832 lines
17 KiB
Go
832 lines
17 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
// Extended and bugfixes by Miek Gieben
|
|
|
|
package dns
|
|
|
|
import (
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// Packet formats
|
|
|
|
// Wire constants and supported types.
|
|
const (
|
|
// valid RR_Header.Rrtype and Question.qtype
|
|
TypeA = 1
|
|
TypeNS = 2
|
|
TypeMD = 3
|
|
TypeMF = 4
|
|
TypeCNAME = 5
|
|
TypeSOA = 6
|
|
TypeMB = 7
|
|
TypeMG = 8
|
|
TypeMR = 9
|
|
TypeNULL = 10
|
|
TypeWKS = 11
|
|
TypePTR = 12
|
|
TypeHINFO = 13
|
|
TypeMINFO = 14
|
|
TypeMX = 15
|
|
TypeTXT = 16
|
|
TypeAAAA = 28
|
|
TypeLOC = 29
|
|
TypeSRV = 33
|
|
TypeNAPTR = 35
|
|
TypeKX = 36
|
|
TypeCERT = 37
|
|
TypeDNAME = 39
|
|
|
|
// EDNS
|
|
TypeOPT = 41
|
|
|
|
TypeSIG = 24
|
|
TypeKEY = 25
|
|
TypeNXT = 30
|
|
TypeDS = 43
|
|
TypeSSHFP = 44
|
|
TypeIPSECKEY = 45 // No type implemented
|
|
TypeRRSIG = 46
|
|
TypeNSEC = 47
|
|
TypeDNSKEY = 48
|
|
TypeDHCID = 49
|
|
TypeNSEC3 = 50
|
|
TypeNSEC3PARAM = 51
|
|
TypeTALINK = 58
|
|
TypeSPF = 99
|
|
|
|
TypeTKEY = 249
|
|
TypeTSIG = 250
|
|
// valid Question.Qtype only
|
|
TypeIXFR = 251
|
|
TypeAXFR = 252
|
|
TypeMAILB = 253
|
|
TypeMAILA = 254
|
|
TypeALL = 255
|
|
// newly defined types
|
|
TypeURI = 256
|
|
|
|
TypeTA = 32768
|
|
TypeDLV = 32769
|
|
|
|
// 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
|
|
RcodeBadKey = 17
|
|
RcodeBadTime = 18
|
|
RcodeBadMode = 19 // TKEY
|
|
RcodeBadName = 20
|
|
RcodeBadAlg = 21
|
|
RcodeBadTrunc = 22 // TSIG
|
|
|
|
// Opcode
|
|
OpcodeQuery = 0
|
|
OpcodeIQuery = 1
|
|
OpcodeStatus = 2
|
|
// There is no 3
|
|
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 (
|
|
// 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
|
|
)
|
|
|
|
// DNS queries.
|
|
type Question struct {
|
|
Name string "domain-name" // "domain-name" specifies encoding
|
|
Qtype uint16
|
|
Qclass uint16
|
|
}
|
|
|
|
func (q *Question) String() string {
|
|
// prefix with ; (as in dig)
|
|
s := ";" + q.Name + "\t"
|
|
s = s + Class_str[q.Qclass] + "\t"
|
|
if _, ok := Rr_str[q.Qtype]; ok {
|
|
s += " " + Rr_str[q.Qtype]
|
|
} else {
|
|
s += " " + "TYPE" + strconv.Itoa(int(q.Qtype))
|
|
}
|
|
return s
|
|
}
|
|
|
|
type RR_CNAME struct {
|
|
Hdr RR_Header
|
|
Cname string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_CNAME) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_CNAME) String() string {
|
|
return rr.Hdr.String() + rr.Cname
|
|
}
|
|
|
|
type RR_HINFO struct {
|
|
Hdr RR_Header
|
|
Cpu string
|
|
Os string
|
|
}
|
|
|
|
func (rr *RR_HINFO) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_HINFO) String() string {
|
|
return rr.Hdr.String() + rr.Cpu + " " + rr.Os
|
|
}
|
|
|
|
type RR_MB struct {
|
|
Hdr RR_Header
|
|
Mb string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_MB) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_MB) String() string {
|
|
return rr.Hdr.String() + rr.Mb
|
|
}
|
|
|
|
type RR_MG struct {
|
|
Hdr RR_Header
|
|
Mg string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_MG) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_MG) String() string {
|
|
return rr.Hdr.String() + rr.Mg
|
|
}
|
|
|
|
type RR_MINFO struct {
|
|
Hdr RR_Header
|
|
Rmail string "domain-name"
|
|
Email string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_MINFO) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_MINFO) String() string {
|
|
return rr.Hdr.String() + rr.Rmail + " " + rr.Email
|
|
}
|
|
|
|
type RR_MR struct {
|
|
Hdr RR_Header
|
|
Mr string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_MR) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_MR) String() string {
|
|
return rr.Hdr.String() + rr.Mr
|
|
}
|
|
|
|
type RR_MX struct {
|
|
Hdr RR_Header
|
|
Pref uint16
|
|
Mx string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_MX) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_MX) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.Pref)) + " " + rr.Mx
|
|
}
|
|
|
|
type RR_NS struct {
|
|
Hdr RR_Header
|
|
Ns string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_NS) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_NS) String() string {
|
|
return rr.Hdr.String() + rr.Ns
|
|
}
|
|
|
|
type RR_PTR struct {
|
|
Hdr RR_Header
|
|
Ptr string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_PTR) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_PTR) String() string {
|
|
return rr.Hdr.String() + rr.Ptr
|
|
}
|
|
|
|
type RR_SOA struct {
|
|
Hdr RR_Header
|
|
Ns string "domain-name"
|
|
Mbox string "domain-name"
|
|
Serial uint32
|
|
Refresh uint32
|
|
Retry uint32
|
|
Expire uint32
|
|
Minttl uint32
|
|
}
|
|
|
|
func (rr *RR_SOA) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_SOA) String() string {
|
|
return rr.Hdr.String() + rr.Ns + " " + rr.Mbox +
|
|
" " + strconv.Itoa(int(rr.Serial)) +
|
|
" " + strconv.Itoa(int(rr.Refresh)) +
|
|
" " + strconv.Itoa(int(rr.Retry)) +
|
|
" " + strconv.Itoa(int(rr.Expire)) +
|
|
" " + strconv.Itoa(int(rr.Minttl))
|
|
}
|
|
|
|
type RR_TXT struct {
|
|
Hdr RR_Header
|
|
Txt string "txt"
|
|
}
|
|
|
|
func (rr *RR_TXT) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_TXT) String() string {
|
|
return rr.Hdr.String() + "\"" + rr.Txt + "\""
|
|
}
|
|
|
|
type RR_SRV struct {
|
|
Hdr RR_Header
|
|
Priority uint16
|
|
Weight uint16
|
|
Port uint16
|
|
Target string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_SRV) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_SRV) String() string {
|
|
return rr.Hdr.String() +
|
|
strconv.Itoa(int(rr.Priority)) + " " +
|
|
strconv.Itoa(int(rr.Weight)) + " " +
|
|
strconv.Itoa(int(rr.Port)) + " " + rr.Target
|
|
}
|
|
|
|
type RR_NAPTR struct {
|
|
Hdr RR_Header
|
|
Order uint16
|
|
Preference uint16
|
|
Flags string
|
|
Service string
|
|
Regexp string
|
|
Replacement string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_NAPTR) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *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
|
|
}
|
|
|
|
// See RFC 4398.
|
|
type RR_CERT struct {
|
|
Hdr RR_Header
|
|
Type uint16
|
|
KeyTag uint16
|
|
Algorithm uint8
|
|
Certificate string "base64"
|
|
}
|
|
|
|
func (rr *RR_CERT) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_CERT) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.Type)) +
|
|
" " + strconv.Itoa(int(rr.KeyTag)) +
|
|
" " + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + rr.Certificate
|
|
}
|
|
|
|
// See RFC 2672.
|
|
type RR_DNAME struct {
|
|
Hdr RR_Header
|
|
Target string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_DNAME) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_DNAME) String() string {
|
|
return rr.Hdr.String() + rr.Target
|
|
}
|
|
|
|
type RR_A struct {
|
|
Hdr RR_Header
|
|
A net.IP "A"
|
|
}
|
|
|
|
func (rr *RR_A) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_A) String() string {
|
|
return rr.Hdr.String() + rr.A.String()
|
|
}
|
|
|
|
type RR_AAAA struct {
|
|
Hdr RR_Header
|
|
AAAA net.IP "AAAA"
|
|
}
|
|
|
|
func (rr *RR_AAAA) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_AAAA) String() string {
|
|
return rr.Hdr.String() + rr.AAAA.String()
|
|
}
|
|
|
|
type RR_LOC struct {
|
|
Hdr RR_Header
|
|
Version uint8
|
|
Size uint8
|
|
HorizPre uint8
|
|
VertPre uint8
|
|
Latitude uint32
|
|
Longitude uint32
|
|
Altitude uint32
|
|
}
|
|
|
|
func (rr *RR_LOC) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_LOC) String() string {
|
|
// Version is not shown
|
|
return rr.Hdr.String() + "TODO"
|
|
}
|
|
|
|
// DNSSEC types
|
|
type RR_RRSIG struct {
|
|
Hdr RR_Header
|
|
TypeCovered uint16
|
|
Algorithm uint8
|
|
Labels uint8
|
|
OrigTtl uint32
|
|
Expiration uint32
|
|
Inception uint32
|
|
KeyTag uint16
|
|
SignerName string "domain-name"
|
|
Signature string "base64"
|
|
}
|
|
|
|
func (rr *RR_RRSIG) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_RRSIG) String() string {
|
|
return rr.Hdr.String() + Rr_str[rr.TypeCovered] +
|
|
" " + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + strconv.Itoa(int(rr.Labels)) +
|
|
" " + strconv.Itoa(int(rr.OrigTtl)) +
|
|
" " + timeToDate(rr.Expiration) +
|
|
" " + timeToDate(rr.Inception) +
|
|
" " + strconv.Itoa(int(rr.KeyTag)) +
|
|
" " + rr.SignerName +
|
|
" " + rr.Signature
|
|
}
|
|
|
|
type RR_NSEC struct {
|
|
Hdr RR_Header
|
|
NextDomain string "domain-name"
|
|
TypeBitMap []uint16 "NSEC"
|
|
}
|
|
|
|
func (rr *RR_NSEC) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_NSEC) String() string {
|
|
s := rr.Hdr.String() + rr.NextDomain
|
|
for i := 0; i < len(rr.TypeBitMap); i++ {
|
|
if _, ok := Rr_str[rr.TypeBitMap[i]]; ok {
|
|
s += " " + Rr_str[rr.TypeBitMap[i]]
|
|
} else {
|
|
s += " " + "TYPE" + strconv.Itoa(int(rr.TypeBitMap[i]))
|
|
}
|
|
}
|
|
return s
|
|
}
|
|
|
|
type RR_DS struct {
|
|
Hdr RR_Header
|
|
KeyTag uint16
|
|
Algorithm uint8
|
|
DigestType uint8
|
|
Digest string "hex"
|
|
}
|
|
|
|
func (rr *RR_DS) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_DS) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) +
|
|
" " + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + strconv.Itoa(int(rr.DigestType)) +
|
|
" " + strings.ToUpper(rr.Digest)
|
|
}
|
|
|
|
type RR_DLV struct {
|
|
Hdr RR_Header
|
|
KeyTag uint16
|
|
Algorithm uint8
|
|
DigestType uint8
|
|
Digest string "hex"
|
|
}
|
|
|
|
func (rr *RR_DLV) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_DLV) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) +
|
|
" " + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + strconv.Itoa(int(rr.DigestType)) +
|
|
" " + strings.ToUpper(rr.Digest)
|
|
}
|
|
|
|
type RR_KX struct {
|
|
Hdr RR_Header
|
|
Preference uint16
|
|
Exchanger string "domain-name"
|
|
}
|
|
|
|
func (rr *RR_KX) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_KX) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) +
|
|
" " + rr.Exchanger
|
|
}
|
|
|
|
type RR_TA struct {
|
|
Hdr RR_Header
|
|
KeyTag uint16
|
|
Algorithm uint8
|
|
DigestType uint8
|
|
Digest string "hex"
|
|
}
|
|
|
|
func (rr *RR_TA) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_TA) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) +
|
|
" " + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + strconv.Itoa(int(rr.DigestType)) +
|
|
" " + strings.ToUpper(rr.Digest)
|
|
}
|
|
|
|
type RR_TALINK struct {
|
|
Hdr RR_Header
|
|
PreviousName string "domain"
|
|
NextName string "domain"
|
|
}
|
|
|
|
func (rr *RR_TALINK) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_TALINK) String() string {
|
|
return rr.Hdr.String() +
|
|
" " + rr.PreviousName + " " + rr.NextName
|
|
}
|
|
|
|
type RR_SSHFP struct {
|
|
Hdr RR_Header
|
|
Algorithm uint8
|
|
Type uint8
|
|
FingerPrint string "hex"
|
|
}
|
|
|
|
func (rr *RR_SSHFP) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_SSHFP) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + strconv.Itoa(int(rr.Type)) +
|
|
" " + strings.ToUpper(rr.FingerPrint)
|
|
}
|
|
|
|
type RR_DNSKEY struct {
|
|
Hdr RR_Header
|
|
Flags uint16
|
|
Protocol uint8
|
|
Algorithm uint8
|
|
PublicKey string "base64"
|
|
}
|
|
|
|
func (rr *RR_DNSKEY) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_DNSKEY) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.Flags)) +
|
|
" " + strconv.Itoa(int(rr.Protocol)) +
|
|
" " + strconv.Itoa(int(rr.Algorithm)) +
|
|
" " + rr.PublicKey
|
|
}
|
|
|
|
type RR_NSEC3 struct {
|
|
Hdr RR_Header
|
|
Hash uint8
|
|
Flags uint8
|
|
Iterations uint16
|
|
SaltLength uint8
|
|
Salt string "size-hex"
|
|
HashLength uint8
|
|
NextDomain string "size-base32"
|
|
TypeBitMap []uint16 "NSEC"
|
|
}
|
|
|
|
func (rr *RR_NSEC3) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_NSEC3) String() string {
|
|
s := rr.Hdr.String()
|
|
s += strconv.Itoa(int(rr.Hash)) +
|
|
" " + strconv.Itoa(int(rr.Flags)) +
|
|
" " + strconv.Itoa(int(rr.Iterations)) +
|
|
" " + strings.ToUpper(rr.Salt) +
|
|
" " + rr.NextDomain
|
|
for i := 0; i < len(rr.TypeBitMap); i++ {
|
|
if _, ok := Rr_str[rr.TypeBitMap[i]]; ok {
|
|
s += " " + Rr_str[rr.TypeBitMap[i]]
|
|
} else {
|
|
s += " " + "TYPE" + strconv.Itoa(int(rr.TypeBitMap[i]))
|
|
}
|
|
}
|
|
return s
|
|
}
|
|
|
|
type RR_NSEC3PARAM struct {
|
|
Hdr RR_Header
|
|
Hash uint8
|
|
Flags uint8
|
|
Iterations uint16
|
|
SaltLength uint8
|
|
Salt string "hex"
|
|
}
|
|
|
|
func (rr *RR_NSEC3PARAM) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_NSEC3PARAM) String() string {
|
|
s := rr.Hdr.String()
|
|
s += strconv.Itoa(int(rr.Hash)) +
|
|
" " + strconv.Itoa(int(rr.Flags)) +
|
|
" " + strconv.Itoa(int(rr.Iterations)) +
|
|
" " + strings.ToUpper(rr.Salt)
|
|
return s
|
|
}
|
|
|
|
// See RFC 4408.
|
|
type RR_SPF struct {
|
|
Hdr RR_Header
|
|
Txt string
|
|
}
|
|
|
|
func (rr *RR_SPF) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_SPF) String() string {
|
|
return rr.Hdr.String() + "\"" + rr.Txt + "\""
|
|
}
|
|
|
|
type RR_TKEY struct {
|
|
Hdr RR_Header
|
|
Algorithm string "domain-name"
|
|
Inception uint32
|
|
Expiration uint32
|
|
Mode uint16
|
|
Error uint16
|
|
KeySize uint16
|
|
Key string
|
|
Otherlen uint16
|
|
OtherData string
|
|
}
|
|
|
|
func (rr *RR_TKEY) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_TKEY) String() string {
|
|
// It has no presentation format
|
|
return ""
|
|
}
|
|
|
|
// Unknown RR representation
|
|
type RR_RFC3597 struct {
|
|
Hdr RR_Header
|
|
Rdata string "hex"
|
|
}
|
|
|
|
func (rr *RR_RFC3597) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_RFC3597) String() string {
|
|
s := rr.Hdr.String()
|
|
s += "\\# " + strconv.Itoa(len(rr.Rdata)/2) + " " + rr.Rdata
|
|
return s
|
|
}
|
|
|
|
type RR_URI struct {
|
|
Hdr RR_Header
|
|
Priority uint16
|
|
Weight uint16
|
|
Target string
|
|
}
|
|
|
|
func (rr *RR_URI) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_URI) String() string {
|
|
return rr.Hdr.String() + strconv.Itoa(int(rr.Priority)) +
|
|
" " + strconv.Itoa(int(rr.Weight)) +
|
|
" " + rr.Target
|
|
}
|
|
|
|
type RR_DHCID struct {
|
|
Hdr RR_Header
|
|
Digest string "base64"
|
|
}
|
|
|
|
func (rr *RR_DHCID) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
func (rr *RR_DHCID) String() string {
|
|
return rr.Hdr.String() + rr.Digest
|
|
}
|
|
|
|
// RFC 2845.
|
|
type RR_TSIG struct {
|
|
Hdr RR_Header
|
|
Algorithm string "domain-name"
|
|
TimeSigned uint64
|
|
Fudge uint16
|
|
MACSize uint16
|
|
MAC string "size-hex"
|
|
OrigId uint16
|
|
Error uint16
|
|
OtherLen uint16
|
|
OtherData string "size-hex"
|
|
}
|
|
|
|
func (rr *RR_TSIG) Header() *RR_Header {
|
|
return &rr.Hdr
|
|
}
|
|
|
|
// TSIG has no official presentation format, but this will suffice.
|
|
func (rr *RR_TSIG) String() string {
|
|
return rr.Hdr.String() +
|
|
" " + rr.Algorithm +
|
|
" " + tsigTimeToDate(rr.TimeSigned) +
|
|
" " + strconv.Itoa(int(rr.Fudge)) +
|
|
" " + strconv.Itoa(int(rr.MACSize)) +
|
|
" " + strings.ToUpper(rr.MAC) +
|
|
" " + strconv.Itoa(int(rr.OrigId)) +
|
|
" " + strconv.Itoa(int(rr.Error)) +
|
|
" " + strconv.Itoa(int(rr.OtherLen)) +
|
|
" " + rr.OtherData
|
|
}
|
|
|
|
// Translate the RRSIG's incep. and expir. time to the correct date.
|
|
// Taking into account serial arithmetic (RFC 1982)
|
|
func timeToDate(t uint32) string {
|
|
utc := time.UTC().Seconds()
|
|
mod := (int64(t) - utc) / Year68
|
|
|
|
// If needed assume wrap around(s)
|
|
ti := time.SecondsToUTC(int64(t) + (mod * Year68)) // abs()? TODO
|
|
return ti.Format("20060102030405")
|
|
}
|
|
|
|
// Translate the TSIG time signed into a date. There is no
|
|
// need for RFC1982 calculations as this date is 48 bits
|
|
func tsigTimeToDate(t uint64) string {
|
|
// only use the lower 48 bits, TODO(mg), check for 48 bit size
|
|
ti := time.SecondsToUTC(int64(t))
|
|
return ti.Format("20060102030405")
|
|
}
|
|
|
|
// Map of constructors for each RR wire type.
|
|
var rr_mk = map[int]func() RR{
|
|
TypeCNAME: func() RR { return new(RR_CNAME) },
|
|
TypeHINFO: func() RR { return new(RR_HINFO) },
|
|
TypeMB: func() RR { return new(RR_MB) },
|
|
TypeMG: func() RR { return new(RR_MG) },
|
|
TypeMINFO: func() RR { return new(RR_MINFO) },
|
|
TypeMR: func() RR { return new(RR_MR) },
|
|
TypeMX: func() RR { return new(RR_MX) },
|
|
TypeNS: func() RR { return new(RR_NS) },
|
|
TypePTR: func() RR { return new(RR_PTR) },
|
|
TypeSOA: func() RR { return new(RR_SOA) },
|
|
TypeTXT: func() RR { return new(RR_TXT) },
|
|
TypeSRV: func() RR { return new(RR_SRV) },
|
|
TypeNAPTR: func() RR { return new(RR_NAPTR) },
|
|
TypeDNAME: func() RR { return new(RR_DNAME) },
|
|
TypeA: func() RR { return new(RR_A) },
|
|
TypeAAAA: func() RR { return new(RR_AAAA) },
|
|
TypeLOC: func() RR { return new(RR_LOC) },
|
|
TypeOPT: func() RR { return new(RR_OPT) },
|
|
TypeDS: func() RR { return new(RR_DS) },
|
|
TypeCERT: func() RR { return new(RR_CERT) },
|
|
TypeKX: func() RR { return new(RR_KX) },
|
|
TypeSPF: func() RR { return new(RR_SPF) },
|
|
TypeTALINK: func() RR { return new(RR_TALINK) },
|
|
TypeSSHFP: func() RR { return new(RR_SSHFP) },
|
|
TypeRRSIG: func() RR { return new(RR_RRSIG) },
|
|
TypeNSEC: func() RR { return new(RR_NSEC) },
|
|
TypeDNSKEY: func() RR { return new(RR_DNSKEY) },
|
|
TypeNSEC3: func() RR { return new(RR_NSEC3) },
|
|
TypeDHCID: func() RR { return new(RR_DHCID) },
|
|
TypeNSEC3PARAM: func() RR { return new(RR_NSEC3PARAM) },
|
|
TypeTKEY: func() RR { return new(RR_TKEY) },
|
|
TypeTSIG: func() RR { return new(RR_TSIG) },
|
|
TypeURI: func() RR { return new(RR_URI) },
|
|
TypeTA: func() RR { return new(RR_TA) },
|
|
TypeDLV: func() RR { return new(RR_DLV) },
|
|
}
|