forked from abh/geodns
/
types.go
1753 lines (1512 loc) · 46.6 KB
/
types.go
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package dns
import (
"encoding/base64"
"fmt"
"net"
"strconv"
"strings"
"time"
)
type (
// Type is a DNS type.
Type uint16
// Class is a DNS class.
Class uint16
// Name is a DNS domain name.
Name string
)
// Packet formats
// Wire constants and supported types.
const (
// valid RR_Header.Rrtype and Question.qtype
TypeNone uint16 = 0
TypeA uint16 = 1
TypeNS uint16 = 2
TypeMD uint16 = 3
TypeMF uint16 = 4
TypeCNAME uint16 = 5
TypeSOA uint16 = 6
TypeMB uint16 = 7
TypeMG uint16 = 8
TypeMR uint16 = 9
TypeNULL uint16 = 10
TypeWKS uint16 = 11
TypePTR uint16 = 12
TypeHINFO uint16 = 13
TypeMINFO uint16 = 14
TypeMX uint16 = 15
TypeTXT uint16 = 16
TypeRP uint16 = 17
TypeAFSDB uint16 = 18
TypeX25 uint16 = 19
TypeISDN uint16 = 20
TypeRT uint16 = 21
TypeNSAP uint16 = 22
TypeNSAPPTR uint16 = 23
TypeSIG uint16 = 24
TypeKEY uint16 = 25
TypePX uint16 = 26
TypeGPOS uint16 = 27
TypeAAAA uint16 = 28
TypeLOC uint16 = 29
TypeNXT uint16 = 30
TypeEID uint16 = 31
TypeNIMLOC uint16 = 32
TypeSRV uint16 = 33
TypeATMA uint16 = 34
TypeNAPTR uint16 = 35
TypeKX uint16 = 36
TypeCERT uint16 = 37
TypeDNAME uint16 = 39
TypeOPT uint16 = 41 // EDNS
TypeDS uint16 = 43
TypeSSHFP uint16 = 44
TypeIPSECKEY uint16 = 45
TypeRRSIG uint16 = 46
TypeNSEC uint16 = 47
TypeDNSKEY uint16 = 48
TypeDHCID uint16 = 49
TypeNSEC3 uint16 = 50
TypeNSEC3PARAM uint16 = 51
TypeTLSA uint16 = 52
TypeHIP uint16 = 55
TypeNINFO uint16 = 56
TypeRKEY uint16 = 57
TypeTALINK uint16 = 58
TypeCDS uint16 = 59
TypeCDNSKEY uint16 = 60
TypeOPENPGPKEY uint16 = 61
TypeSPF uint16 = 99
TypeUINFO uint16 = 100
TypeUID uint16 = 101
TypeGID uint16 = 102
TypeUNSPEC uint16 = 103
TypeNID uint16 = 104
TypeL32 uint16 = 105
TypeL64 uint16 = 106
TypeLP uint16 = 107
TypeEUI48 uint16 = 108
TypeEUI64 uint16 = 109
TypeTKEY uint16 = 249
TypeTSIG uint16 = 250
// valid Question.Qtype only
TypeIXFR uint16 = 251
TypeAXFR uint16 = 252
TypeMAILB uint16 = 253
TypeMAILA uint16 = 254
TypeANY uint16 = 255
TypeURI uint16 = 256
TypeCAA uint16 = 257
TypeTA uint16 = 32768
TypeDLV uint16 = 32769
TypeReserved uint16 = 65535
// valid Question.Qclass
ClassINET = 1
ClassCSNET = 2
ClassCHAOS = 3
ClassHESIOD = 4
ClassNONE = 254
ClassANY = 255
// Msg.rcode
RcodeSuccess = 0
RcodeFormatError = 1
RcodeServerFailure = 2
RcodeNameError = 3
RcodeNotImplemented = 4
RcodeRefused = 5
RcodeYXDomain = 6
RcodeYXRrset = 7
RcodeNXRrset = 8
RcodeNotAuth = 9
RcodeNotZone = 10
RcodeBadSig = 16 // TSIG
RcodeBadVers = 16 // EDNS0
RcodeBadKey = 17
RcodeBadTime = 18
RcodeBadMode = 19 // TKEY
RcodeBadName = 20
RcodeBadAlg = 21
RcodeBadTrunc = 22 // TSIG
// Opcode, there is no 3
OpcodeQuery = 0
OpcodeIQuery = 1
OpcodeStatus = 2
OpcodeNotify = 4
OpcodeUpdate = 5
)
// The wire format for the DNS packet header.
type Header struct {
Id uint16
Bits uint16
Qdcount, Ancount, Nscount, Arcount uint16
}
const (
headerSize = 12
// Header.Bits
_QR = 1 << 15 // query/response (response=1)
_AA = 1 << 10 // authoritative
_TC = 1 << 9 // truncated
_RD = 1 << 8 // recursion desired
_RA = 1 << 7 // recursion available
_Z = 1 << 6 // Z
_AD = 1 << 5 // authticated data
_CD = 1 << 4 // checking disabled
LOC_EQUATOR = 1 << 31 // RFC 1876, Section 2.
LOC_PRIMEMERIDIAN = 1 << 31 // RFC 1876, Section 2.
LOC_HOURS = 60 * 1000
LOC_DEGREES = 60 * LOC_HOURS
LOC_ALTITUDEBASE = 100000
)
// RFC 4398, Section 2.1
const (
CertPKIX = 1 + iota
CertSPKI
CertPGP
CertIPIX
CertISPKI
CertIPGP
CertACPKIX
CertIACPKIX
CertURI = 253
CertOID = 254
)
var CertTypeToString = map[uint16]string{
CertPKIX: "PKIX",
CertSPKI: "SPKI",
CertPGP: "PGP",
CertIPIX: "IPIX",
CertISPKI: "ISPKI",
CertIPGP: "IPGP",
CertACPKIX: "ACPKIX",
CertIACPKIX: "IACPKIX",
CertURI: "URI",
CertOID: "OID",
}
var StringToCertType = reverseInt16(CertTypeToString)
// Question holds a DNS question. There can be multiple questions in the
// question section of a message. Usually there is just one.
type Question struct {
Name string `dns:"cdomain-name"` // "cdomain-name" specifies encoding (and may be compressed)
Qtype uint16
Qclass uint16
}
func (q *Question) String() (s string) {
// prefix with ; (as in dig)
s = ";" + sprintName(q.Name) + "\t"
s += Class(q.Qclass).String() + "\t"
s += " " + Type(q.Qtype).String()
return s
}
func (q *Question) len() int {
l := len(q.Name) + 1
return l + 4
}
type ANY struct {
Hdr RR_Header
// Does not have any rdata
}
func (rr *ANY) Header() *RR_Header { return &rr.Hdr }
func (rr *ANY) copy() RR { return &ANY{*rr.Hdr.copyHeader()} }
func (rr *ANY) String() string { return rr.Hdr.String() }
func (rr *ANY) len() int { return rr.Hdr.len() }
type CNAME struct {
Hdr RR_Header
Target string `dns:"cdomain-name"`
}
func (rr *CNAME) Header() *RR_Header { return &rr.Hdr }
func (rr *CNAME) copy() RR { return &CNAME{*rr.Hdr.copyHeader(), sprintName(rr.Target)} }
func (rr *CNAME) String() string { return rr.Hdr.String() + rr.Target }
func (rr *CNAME) len() int { return rr.Hdr.len() + len(rr.Target) + 1 }
type HINFO struct {
Hdr RR_Header
Cpu string
Os string
}
func (rr *HINFO) Header() *RR_Header { return &rr.Hdr }
func (rr *HINFO) copy() RR { return &HINFO{*rr.Hdr.copyHeader(), rr.Cpu, rr.Os} }
func (rr *HINFO) String() string {
return rr.Hdr.String() + sprintTxt([]string{rr.Cpu, rr.Os})
}
func (rr *HINFO) len() int { return rr.Hdr.len() + len(rr.Cpu) + len(rr.Os) }
type MB struct {
Hdr RR_Header
Mb string `dns:"cdomain-name"`
}
func (rr *MB) Header() *RR_Header { return &rr.Hdr }
func (rr *MB) copy() RR { return &MB{*rr.Hdr.copyHeader(), sprintName(rr.Mb)} }
func (rr *MB) String() string { return rr.Hdr.String() + rr.Mb }
func (rr *MB) len() int { return rr.Hdr.len() + len(rr.Mb) + 1 }
type MG struct {
Hdr RR_Header
Mg string `dns:"cdomain-name"`
}
func (rr *MG) Header() *RR_Header { return &rr.Hdr }
func (rr *MG) copy() RR { return &MG{*rr.Hdr.copyHeader(), rr.Mg} }
func (rr *MG) len() int { l := len(rr.Mg) + 1; return rr.Hdr.len() + l }
func (rr *MG) String() string { return rr.Hdr.String() + sprintName(rr.Mg) }
type MINFO struct {
Hdr RR_Header
Rmail string `dns:"cdomain-name"`
Email string `dns:"cdomain-name"`
}
func (rr *MINFO) Header() *RR_Header { return &rr.Hdr }
func (rr *MINFO) copy() RR { return &MINFO{*rr.Hdr.copyHeader(), rr.Rmail, rr.Email} }
func (rr *MINFO) String() string {
return rr.Hdr.String() + sprintName(rr.Rmail) + " " + sprintName(rr.Email)
}
func (rr *MINFO) len() int {
l := len(rr.Rmail) + 1
n := len(rr.Email) + 1
return rr.Hdr.len() + l + n
}
type MR struct {
Hdr RR_Header
Mr string `dns:"cdomain-name"`
}
func (rr *MR) Header() *RR_Header { return &rr.Hdr }
func (rr *MR) copy() RR { return &MR{*rr.Hdr.copyHeader(), rr.Mr} }
func (rr *MR) len() int { l := len(rr.Mr) + 1; return rr.Hdr.len() + l }
func (rr *MR) String() string {
return rr.Hdr.String() + sprintName(rr.Mr)
}
type MF struct {
Hdr RR_Header
Mf string `dns:"cdomain-name"`
}
func (rr *MF) Header() *RR_Header { return &rr.Hdr }
func (rr *MF) copy() RR { return &MF{*rr.Hdr.copyHeader(), rr.Mf} }
func (rr *MF) len() int { return rr.Hdr.len() + len(rr.Mf) + 1 }
func (rr *MF) String() string {
return rr.Hdr.String() + sprintName(rr.Mf)
}
type MD struct {
Hdr RR_Header
Md string `dns:"cdomain-name"`
}
func (rr *MD) Header() *RR_Header { return &rr.Hdr }
func (rr *MD) copy() RR { return &MD{*rr.Hdr.copyHeader(), rr.Md} }
func (rr *MD) len() int { return rr.Hdr.len() + len(rr.Md) + 1 }
func (rr *MD) String() string {
return rr.Hdr.String() + sprintName(rr.Md)
}
type MX struct {
Hdr RR_Header
Preference uint16
Mx string `dns:"cdomain-name"`
}
func (rr *MX) Header() *RR_Header { return &rr.Hdr }
func (rr *MX) copy() RR { return &MX{*rr.Hdr.copyHeader(), rr.Preference, rr.Mx} }
func (rr *MX) len() int { l := len(rr.Mx) + 1; return rr.Hdr.len() + l + 2 }
func (rr *MX) String() string {
return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Mx)
}
type AFSDB struct {
Hdr RR_Header
Subtype uint16
Hostname string `dns:"cdomain-name"`
}
func (rr *AFSDB) Header() *RR_Header { return &rr.Hdr }
func (rr *AFSDB) copy() RR { return &AFSDB{*rr.Hdr.copyHeader(), rr.Subtype, rr.Hostname} }
func (rr *AFSDB) len() int { l := len(rr.Hostname) + 1; return rr.Hdr.len() + l + 2 }
func (rr *AFSDB) String() string {
return rr.Hdr.String() + strconv.Itoa(int(rr.Subtype)) + " " + sprintName(rr.Hostname)
}
type X25 struct {
Hdr RR_Header
PSDNAddress string
}
func (rr *X25) Header() *RR_Header { return &rr.Hdr }
func (rr *X25) copy() RR { return &X25{*rr.Hdr.copyHeader(), rr.PSDNAddress} }
func (rr *X25) len() int { return rr.Hdr.len() + len(rr.PSDNAddress) + 1 }
func (rr *X25) String() string {
return rr.Hdr.String() + rr.PSDNAddress
}
type RT struct {
Hdr RR_Header
Preference uint16
Host string `dns:"cdomain-name"`
}
func (rr *RT) Header() *RR_Header { return &rr.Hdr }
func (rr *RT) copy() RR { return &RT{*rr.Hdr.copyHeader(), rr.Preference, rr.Host} }
func (rr *RT) len() int { l := len(rr.Host) + 1; return rr.Hdr.len() + l + 2 }
func (rr *RT) String() string {
return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Host)
}
type NS struct {
Hdr RR_Header
Ns string `dns:"cdomain-name"`
}
func (rr *NS) Header() *RR_Header { return &rr.Hdr }
func (rr *NS) len() int { l := len(rr.Ns) + 1; return rr.Hdr.len() + l }
func (rr *NS) copy() RR { return &NS{*rr.Hdr.copyHeader(), rr.Ns} }
func (rr *NS) String() string {
return rr.Hdr.String() + sprintName(rr.Ns)
}
type PTR struct {
Hdr RR_Header
Ptr string `dns:"cdomain-name"`
}
func (rr *PTR) Header() *RR_Header { return &rr.Hdr }
func (rr *PTR) copy() RR { return &PTR{*rr.Hdr.copyHeader(), rr.Ptr} }
func (rr *PTR) len() int { l := len(rr.Ptr) + 1; return rr.Hdr.len() + l }
func (rr *PTR) String() string {
return rr.Hdr.String() + sprintName(rr.Ptr)
}
type RP struct {
Hdr RR_Header
Mbox string `dns:"domain-name"`
Txt string `dns:"domain-name"`
}
func (rr *RP) Header() *RR_Header { return &rr.Hdr }
func (rr *RP) copy() RR { return &RP{*rr.Hdr.copyHeader(), rr.Mbox, rr.Txt} }
func (rr *RP) len() int { return rr.Hdr.len() + len(rr.Mbox) + 1 + len(rr.Txt) + 1 }
func (rr *RP) String() string {
return rr.Hdr.String() + rr.Mbox + " " + sprintTxt([]string{rr.Txt})
}
type SOA struct {
Hdr RR_Header
Ns string `dns:"cdomain-name"`
Mbox string `dns:"cdomain-name"`
Serial uint32
Refresh uint32
Retry uint32
Expire uint32
Minttl uint32
}
func (rr *SOA) Header() *RR_Header { return &rr.Hdr }
func (rr *SOA) copy() RR {
return &SOA{*rr.Hdr.copyHeader(), rr.Ns, rr.Mbox, rr.Serial, rr.Refresh, rr.Retry, rr.Expire, rr.Minttl}
}
func (rr *SOA) String() string {
return rr.Hdr.String() + sprintName(rr.Ns) + " " + sprintName(rr.Mbox) +
" " + strconv.FormatInt(int64(rr.Serial), 10) +
" " + strconv.FormatInt(int64(rr.Refresh), 10) +
" " + strconv.FormatInt(int64(rr.Retry), 10) +
" " + strconv.FormatInt(int64(rr.Expire), 10) +
" " + strconv.FormatInt(int64(rr.Minttl), 10)
}
func (rr *SOA) len() int {
l := len(rr.Ns) + 1
n := len(rr.Mbox) + 1
return rr.Hdr.len() + l + n + 20
}
type TXT struct {
Hdr RR_Header
Txt []string `dns:"txt"`
}
func (rr *TXT) Header() *RR_Header { return &rr.Hdr }
func (rr *TXT) copy() RR {
cp := make([]string, len(rr.Txt), cap(rr.Txt))
copy(cp, rr.Txt)
return &TXT{*rr.Hdr.copyHeader(), cp}
}
func (rr *TXT) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) }
func sprintName(s string) string {
src := []byte(s)
dst := make([]byte, 0, len(src))
for i := 0; i < len(src); {
if i+1 < len(src) && src[i] == '\\' && src[i+1] == '.' {
dst = append(dst, src[i:i+2]...)
i += 2
} else {
b, n := nextByte(src, i)
if n == 0 {
i++ // dangling back slash
} else if b == '.' {
dst = append(dst, b)
} else {
dst = appendDomainNameByte(dst, b)
}
i += n
}
}
return string(dst)
}
func sprintTxtOctet(s string) string {
src := []byte(s)
dst := make([]byte, 0, len(src))
dst = append(dst, '"')
for i := 0; i < len(src); {
if i+1 < len(src) && src[i] == '\\' && src[i+1] == '.' {
dst = append(dst, src[i:i+2]...)
i += 2
} else {
b, n := nextByte(src, i)
if n == 0 {
i++ // dangling back slash
} else if b == '.' {
dst = append(dst, b)
} else {
if b < ' ' || b > '~' {
dst = appendByte(dst, b)
} else {
dst = append(dst, b)
}
}
i += n
}
}
dst = append(dst, '"')
return string(dst)
}
func sprintTxt(txt []string) string {
var out []byte
for i, s := range txt {
if i > 0 {
out = append(out, ` "`...)
} else {
out = append(out, '"')
}
bs := []byte(s)
for j := 0; j < len(bs); {
b, n := nextByte(bs, j)
if n == 0 {
break
}
out = appendTXTStringByte(out, b)
j += n
}
out = append(out, '"')
}
return string(out)
}
func appendDomainNameByte(s []byte, b byte) []byte {
switch b {
case '.', ' ', '\'', '@', ';', '(', ')': // additional chars to escape
return append(s, '\\', b)
}
return appendTXTStringByte(s, b)
}
func appendTXTStringByte(s []byte, b byte) []byte {
switch b {
case '\t':
return append(s, '\\', 't')
case '\r':
return append(s, '\\', 'r')
case '\n':
return append(s, '\\', 'n')
case '"', '\\':
return append(s, '\\', b)
}
if b < ' ' || b > '~' {
return appendByte(s, b)
}
return append(s, b)
}
func appendByte(s []byte, b byte) []byte {
var buf [3]byte
bufs := strconv.AppendInt(buf[:0], int64(b), 10)
s = append(s, '\\')
for i := 0; i < 3-len(bufs); i++ {
s = append(s, '0')
}
for _, r := range bufs {
s = append(s, r)
}
return s
}
func nextByte(b []byte, offset int) (byte, int) {
if offset >= len(b) {
return 0, 0
}
if b[offset] != '\\' {
// not an escape sequence
return b[offset], 1
}
switch len(b) - offset {
case 1: // dangling escape
return 0, 0
case 2, 3: // too short to be \ddd
default: // maybe \ddd
if isDigit(b[offset+1]) && isDigit(b[offset+2]) && isDigit(b[offset+3]) {
return dddToByte(b[offset+1:]), 4
}
}
// not \ddd, maybe a control char
switch b[offset+1] {
case 't':
return '\t', 2
case 'r':
return '\r', 2
case 'n':
return '\n', 2
default:
return b[offset+1], 2
}
}
func (rr *TXT) len() int {
l := rr.Hdr.len()
for _, t := range rr.Txt {
l += len(t) + 1
}
return l
}
type SPF struct {
Hdr RR_Header
Txt []string `dns:"txt"`
}
func (rr *SPF) Header() *RR_Header { return &rr.Hdr }
func (rr *SPF) copy() RR {
cp := make([]string, len(rr.Txt), cap(rr.Txt))
copy(cp, rr.Txt)
return &SPF{*rr.Hdr.copyHeader(), cp}
}
func (rr *SPF) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) }
func (rr *SPF) len() int {
l := rr.Hdr.len()
for _, t := range rr.Txt {
l += len(t) + 1
}
return l
}
type SRV struct {
Hdr RR_Header
Priority uint16
Weight uint16
Port uint16
Target string `dns:"domain-name"`
}
func (rr *SRV) Header() *RR_Header { return &rr.Hdr }
func (rr *SRV) len() int { l := len(rr.Target) + 1; return rr.Hdr.len() + l + 6 }
func (rr *SRV) copy() RR {
return &SRV{*rr.Hdr.copyHeader(), rr.Priority, rr.Weight, rr.Port, rr.Target}
}
func (rr *SRV) String() string {
return rr.Hdr.String() +
strconv.Itoa(int(rr.Priority)) + " " +
strconv.Itoa(int(rr.Weight)) + " " +
strconv.Itoa(int(rr.Port)) + " " + sprintName(rr.Target)
}
type NAPTR struct {
Hdr RR_Header
Order uint16
Preference uint16
Flags string
Service string
Regexp string
Replacement string `dns:"domain-name"`
}
func (rr *NAPTR) Header() *RR_Header { return &rr.Hdr }
func (rr *NAPTR) copy() RR {
return &NAPTR{*rr.Hdr.copyHeader(), rr.Order, rr.Preference, rr.Flags, rr.Service, rr.Regexp, rr.Replacement}
}
func (rr *NAPTR) String() string {
return rr.Hdr.String() +
strconv.Itoa(int(rr.Order)) + " " +
strconv.Itoa(int(rr.Preference)) + " " +
"\"" + rr.Flags + "\" " +
"\"" + rr.Service + "\" " +
"\"" + rr.Regexp + "\" " +
rr.Replacement
}
func (rr *NAPTR) len() int {
return rr.Hdr.len() + 4 + len(rr.Flags) + 1 + len(rr.Service) + 1 +
len(rr.Regexp) + 1 + len(rr.Replacement) + 1
}
// See RFC 4398.
type CERT struct {
Hdr RR_Header
Type uint16
KeyTag uint16
Algorithm uint8
Certificate string `dns:"base64"`
}
func (rr *CERT) Header() *RR_Header { return &rr.Hdr }
func (rr *CERT) copy() RR {
return &CERT{*rr.Hdr.copyHeader(), rr.Type, rr.KeyTag, rr.Algorithm, rr.Certificate}
}
func (rr *CERT) String() string {
var (
ok bool
certtype, algorithm string
)
if certtype, ok = CertTypeToString[rr.Type]; !ok {
certtype = strconv.Itoa(int(rr.Type))
}
if algorithm, ok = AlgorithmToString[rr.Algorithm]; !ok {
algorithm = strconv.Itoa(int(rr.Algorithm))
}
return rr.Hdr.String() + certtype +
" " + strconv.Itoa(int(rr.KeyTag)) +
" " + algorithm +
" " + rr.Certificate
}
func (rr *CERT) len() int {
return rr.Hdr.len() + 5 +
base64.StdEncoding.DecodedLen(len(rr.Certificate))
}
// See RFC 2672.
type DNAME struct {
Hdr RR_Header
Target string `dns:"domain-name"`
}
func (rr *DNAME) Header() *RR_Header { return &rr.Hdr }
func (rr *DNAME) copy() RR { return &DNAME{*rr.Hdr.copyHeader(), rr.Target} }
func (rr *DNAME) len() int { l := len(rr.Target) + 1; return rr.Hdr.len() + l }
func (rr *DNAME) String() string {
return rr.Hdr.String() + sprintName(rr.Target)
}
type A struct {
Hdr RR_Header
A net.IP `dns:"a"`
}
func (rr *A) Header() *RR_Header { return &rr.Hdr }
func (rr *A) copy() RR { return &A{*rr.Hdr.copyHeader(), copyIP(rr.A)} }
func (rr *A) len() int { return rr.Hdr.len() + net.IPv4len }
func (rr *A) String() string {
if rr.A == nil {
return rr.Hdr.String()
}
return rr.Hdr.String() + rr.A.String()
}
type AAAA struct {
Hdr RR_Header
AAAA net.IP `dns:"aaaa"`
}
func (rr *AAAA) Header() *RR_Header { return &rr.Hdr }
func (rr *AAAA) copy() RR { return &AAAA{*rr.Hdr.copyHeader(), copyIP(rr.AAAA)} }
func (rr *AAAA) len() int { return rr.Hdr.len() + net.IPv6len }
func (rr *AAAA) String() string {
if rr.AAAA == nil {
return rr.Hdr.String()
}
return rr.Hdr.String() + rr.AAAA.String()
}
type PX struct {
Hdr RR_Header
Preference uint16
Map822 string `dns:"domain-name"`
Mapx400 string `dns:"domain-name"`
}
func (rr *PX) Header() *RR_Header { return &rr.Hdr }
func (rr *PX) copy() RR { return &PX{*rr.Hdr.copyHeader(), rr.Preference, rr.Map822, rr.Mapx400} }
func (rr *PX) String() string {
return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Map822) + " " + sprintName(rr.Mapx400)
}
func (rr *PX) len() int { return rr.Hdr.len() + 2 + len(rr.Map822) + 1 + len(rr.Mapx400) + 1 }
type GPOS struct {
Hdr RR_Header
Longitude string
Latitude string
Altitude string
}
func (rr *GPOS) Header() *RR_Header { return &rr.Hdr }
func (rr *GPOS) copy() RR { return &GPOS{*rr.Hdr.copyHeader(), rr.Longitude, rr.Latitude, rr.Altitude} }
func (rr *GPOS) len() int {
return rr.Hdr.len() + len(rr.Longitude) + len(rr.Latitude) + len(rr.Altitude) + 3
}
func (rr *GPOS) String() string {
return rr.Hdr.String() + rr.Longitude + " " + rr.Latitude + " " + rr.Altitude
}
type LOC struct {
Hdr RR_Header
Version uint8
Size uint8
HorizPre uint8
VertPre uint8
Latitude uint32
Longitude uint32
Altitude uint32
}
func (rr *LOC) Header() *RR_Header { return &rr.Hdr }
func (rr *LOC) len() int { return rr.Hdr.len() + 4 + 12 }
func (rr *LOC) copy() RR {
return &LOC{*rr.Hdr.copyHeader(), rr.Version, rr.Size, rr.HorizPre, rr.VertPre, rr.Latitude, rr.Longitude, rr.Altitude}
}
// cmToM takes a cm value expressed in RFC1876 SIZE mantissa/exponent
// format and returns a string in m (two decimals for the cm)
func cmToM(m, e uint8) string {
if e < 2 {
if e == 1 {
m *= 10
}
return fmt.Sprintf("0.%02d", m)
}
s := fmt.Sprintf("%d", m)
for e > 2 {
s += "0"
e--
}
return s
}
// String returns a string version of a LOC
func (rr *LOC) String() string {
s := rr.Hdr.String()
lat := rr.Latitude
ns := "N"
if lat > LOC_EQUATOR {
lat = lat - LOC_EQUATOR
} else {
ns = "S"
lat = LOC_EQUATOR - lat
}
h := lat / LOC_DEGREES
lat = lat % LOC_DEGREES
m := lat / LOC_HOURS
lat = lat % LOC_HOURS
s += fmt.Sprintf("%02d %02d %0.3f %s ", h, m, (float64(lat) / 1000), ns)
lon := rr.Longitude
ew := "E"
if lon > LOC_PRIMEMERIDIAN {
lon = lon - LOC_PRIMEMERIDIAN
} else {
ew = "W"
lon = LOC_PRIMEMERIDIAN - lon
}
h = lon / LOC_DEGREES
lon = lon % LOC_DEGREES
m = lon / LOC_HOURS
lon = lon % LOC_HOURS
s += fmt.Sprintf("%02d %02d %0.3f %s ", h, m, (float64(lon) / 1000), ew)
var alt = float64(rr.Altitude) / 100
alt -= LOC_ALTITUDEBASE
if rr.Altitude%100 != 0 {
s += fmt.Sprintf("%.2fm ", alt)
} else {
s += fmt.Sprintf("%.0fm ", alt)
}
s += cmToM((rr.Size&0xf0)>>4, rr.Size&0x0f) + "m "
s += cmToM((rr.HorizPre&0xf0)>>4, rr.HorizPre&0x0f) + "m "
s += cmToM((rr.VertPre&0xf0)>>4, rr.VertPre&0x0f) + "m"
return s
}
// SIG is identical to RRSIG and nowadays only used for SIG(0), RFC2931.
type SIG struct {
RRSIG
}
type RRSIG struct {
Hdr RR_Header
TypeCovered uint16
Algorithm uint8
Labels uint8
OrigTtl uint32
Expiration uint32
Inception uint32
KeyTag uint16
SignerName string `dns:"domain-name"`
Signature string `dns:"base64"`
}
func (rr *RRSIG) Header() *RR_Header { return &rr.Hdr }
func (rr *RRSIG) copy() RR {
return &RRSIG{*rr.Hdr.copyHeader(), rr.TypeCovered, rr.Algorithm, rr.Labels, rr.OrigTtl, rr.Expiration, rr.Inception, rr.KeyTag, rr.SignerName, rr.Signature}
}
func (rr *RRSIG) String() string {
s := rr.Hdr.String()
s += Type(rr.TypeCovered).String()
s += " " + strconv.Itoa(int(rr.Algorithm)) +
" " + strconv.Itoa(int(rr.Labels)) +
" " + strconv.FormatInt(int64(rr.OrigTtl), 10) +
" " + TimeToString(rr.Expiration) +
" " + TimeToString(rr.Inception) +
" " + strconv.Itoa(int(rr.KeyTag)) +
" " + sprintName(rr.SignerName) +
" " + rr.Signature
return s
}
func (rr *RRSIG) len() int {
return rr.Hdr.len() + len(rr.SignerName) + 1 +
base64.StdEncoding.DecodedLen(len(rr.Signature)) + 18
}
type NSEC struct {
Hdr RR_Header
NextDomain string `dns:"domain-name"`
TypeBitMap []uint16 `dns:"nsec"`
}
func (rr *NSEC) Header() *RR_Header { return &rr.Hdr }
func (rr *NSEC) copy() RR {
cp := make([]uint16, len(rr.TypeBitMap), cap(rr.TypeBitMap))
copy(cp, rr.TypeBitMap)
return &NSEC{*rr.Hdr.copyHeader(), rr.NextDomain, cp}
}
func (rr *NSEC) String() string {
s := rr.Hdr.String() + sprintName(rr.NextDomain)
for i := 0; i < len(rr.TypeBitMap); i++ {
s += " " + Type(rr.TypeBitMap[i]).String()
}
return s
}
func (rr *NSEC) len() int {
l := rr.Hdr.len() + len(rr.NextDomain) + 1
lastwindow := uint32(2 ^ 32 + 1)
for _, t := range rr.TypeBitMap {
window := t / 256
if uint32(window) != lastwindow {
l += 1 + 32
}
lastwindow = uint32(window)
}
return l
}
type DLV struct {
DS
}
type CDS struct {
DS
}
type DS struct {
Hdr RR_Header
KeyTag uint16
Algorithm uint8
DigestType uint8
Digest string `dns:"hex"`
}
func (rr *DS) Header() *RR_Header { return &rr.Hdr }
func (rr *DS) len() int { return rr.Hdr.len() + 4 + len(rr.Digest)/2 }
func (rr *DS) copy() RR {
return &DS{*rr.Hdr.copyHeader(), rr.KeyTag, rr.Algorithm, rr.DigestType, rr.Digest}
}
func (rr *DS) String() string {
return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) +
" " + strconv.Itoa(int(rr.Algorithm)) +