xdns

package
v0.0.0-...-99b537f Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Nov 8, 2024 License: MPL-2.0 Imports: 12 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	ClientMagicLen = 8
)

Variables

View Source 
var (
	CertMagic               = [4]byte{0x44, 0x4e, 0x53, 0x43}
	ServerMagic             = [8]byte{0x72, 0x36, 0x66, 0x6e, 0x76, 0x57, 0x6a, 0x38}
	MinDNSPacketSize        = 12 + 5
	MaxDNSPacketSize        = 4096
	MaxDNSUDPPacketSize     = 4096
	MaxDNSUDPSafePacketSize = 1252
	BlockTTL                = uint32(5)
	AnsTTL                  = uint32(60)
	MaxMTU                  = 0xffff // 65k, ought to be enough for everybody
)
View Source 
var (
	MDNSAddr4 = &net.UDPAddr{
		IP:   net.ParseIP(mdnsip4),
		Port: mdnsPort,
	}
	MDNSAddr6 = &net.UDPAddr{
		IP:   net.ParseIP(mdnsip6),
		Port: mdnsPort,
	}
)

Functions

func AAAAAnswer 

func AAAAAnswer(msg *dns.Msg) []netip.Addr

func AAnswer 

func AAnswer(msg *dns.Msg) []netip.Addr

func AName 

func AName(ans dns.RR) (string, error)

func AQuadAForQuery 

func AQuadAForQuery(q *dns.Msg, ips ...netip.Addr) (a *dns.Msg, err error)

func AQuadAUnspecified 

func AQuadAUnspecified(msg *dns.Msg) bool

func AddEDNS0PaddingIfNoneFound 

func AddEDNS0PaddingIfNoneFound(msg *dns.Msg)

func Ans 

func Ans(msg *dns.Msg) (s string)

func AsMsg 

func AsMsg(packet []byte) *dns.Msg

func AsMsg2 

func AsMsg2(packet []byte) (*dns.Msg, error)

func BlockResponseFromMessage 

func BlockResponseFromMessage(q []byte) (*dns.Msg, error)

func ComputePaddingSize 

func ComputePaddingSize(msg *dns.Msg) int

Compute the number of padding bytes needed, excluding headers.

func DnsIPPort 

func DnsIPPort(s string) (ipp netip.AddrPort, err error)

func EDNS0PadLen 

func EDNS0PadLen(msg *dns.Msg) int

func EmptyResponseFromMessage 

func EmptyResponseFromMessage(srcMsg *dns.Msg) *dns.Msg

func ExtractMDNSDomain 

func ExtractMDNSDomain(msg *dns.Msg) (svc, tld string)

func FindUnique 

func FindUnique(s []string, n []string) (u []string)

returns unique strings in n not in s as new array

func GetBlocklistStampFromURL 

func GetBlocklistStampFromURL(rawurl string) (string, error)

TODO: Move to dnsx?

func GetBlocklistStampHeaderKey 

func GetBlocklistStampHeaderKey() string

GetBlocklistStampHeaderKey returns the http-header key for blocklists stamp

func GetInterestingRData 

func GetInterestingRData(msg *dns.Msg) string

func GetRethinkDNSRegionHeaderKey1 

func GetRethinkDNSRegionHeaderKey1() string

GetBlocklistStampHeaderKey1 returns the http-header key for region set by rdns upstream on Fly

func GetRethinkDNSRegionHeaderKey2 

func GetRethinkDNSRegionHeaderKey2() (r string)

GetBlocklistStampHeaderKey2 returns the http-header key for region set by rdns upstream on Cloudflare

func HasAAAAAnswer 

func HasAAAAAnswer(msg *dns.Msg) bool

func HasAAAAQuestion 

func HasAAAAQuestion(msg *dns.Msg) bool

whether the given msg (ans/query) has a AAAA question section

func HasAAnswer 

func HasAAnswer(msg *dns.Msg) bool

func HasAQuadAQuestion 

func HasAQuadAQuestion(msg *dns.Msg) bool

whether the given msg (ans/query) has a a/aaaa question section

func HasAQuestion 

func HasAQuestion(msg *dns.Msg) bool

whether the given msg (ans/query) has a A question section

func HasAnyAnswer 

func HasAnyAnswer(msg *dns.Msg) bool

func HasAnyQuestion 

func HasAnyQuestion(msg *dns.Msg) bool

func HasHTTPQuestion 

func HasHTTPQuestion(msg *dns.Msg) (ok bool)

whether the given msg (ans/query) has a https question section

func HasRcodeSuccess 

func HasRcodeSuccess(msg *dns.Msg) bool

func HasSVCBQuestion 

func HasSVCBQuestion(msg *dns.Msg) (ok bool)

whether the given msg (ans/query) has a svcb question section

func HasTCFlag 

func HasTCFlag(msg *dns.Msg) bool

func HasTCFlag2 

func HasTCFlag2(packet []byte) bool

func IPHints 

func IPHints(msg *dns.Msg, x dns.SVCBKey) []netip.Addr

func IsAAAAQType 

func IsAAAAQType(qtype uint16) bool

whether the qtype code is a aaaa qtype

func IsAQType 

func IsAQType(qtype uint16) bool

whether the qtype code is a A qtype

func IsARecord 

func IsARecord(rr dns.RR) bool

func IsHTTPQuestion 

func IsHTTPQuestion(q *dns.Question) bool

whether question q is a https question

func IsHTTPSQType 

func IsHTTPSQType(qtype uint16) bool

whether the qtype code is a https qtype

func IsMDNSQuery 

func IsMDNSQuery(qname string) bool

func IsNXDomain 

func IsNXDomain(msg *dns.Msg) bool

func IsSVCBQType 

func IsSVCBQType(qtype uint16) bool

whether the qtype code is a svcb qtype

func IsSVCBQuestion 

func IsSVCBQuestion(q *dns.Question) bool

whether question q is a svcb question

func IsServFailOrInvalid 

func IsServFailOrInvalid(msg *dns.Msg) bool

func Len 

func Len(msg *dns.Msg) int

func MakeAAAARecord 

func MakeAAAARecord(name string, ip6 string, expiry int) *dns.AAAA

func MakeARecord 

func MakeARecord(name string, ip4 string, expiry int) *dns.A

func Max 

func Max(a, b int) int

func MaybeToQuadA 

func MaybeToQuadA(answer dns.RR, prefix *net.IPNet, minttl uint32) *dns.AAAA

MaybeToQuadA translates an A record to a AAAA record if the prefix is not nil. The ttl of the new record is the minimum of the original ttl and minttl. If the prefix is nil or answer has an empty A record, it returns nil.

func Min 

func Min(a, b int) int

func Net2ProxyID 

func Net2ProxyID(network string) (proto string, pids []string)

Net2ProxyID splits network string into proto and pid; proto is the network protocol and pid is the proxy ID. May return empty strings.

func NetAndProxyID 

func NetAndProxyID(proto string, pidcsv ...string) string

NetAndProxyID joins proto and pid into a network string. proto is the network protocol and pid is the proxy ID. May return just the separator ":", if both proto, pid are empty.

func NormalizeQName 

func NormalizeQName(str string) (string, error)

func PrefixWithSize 

func PrefixWithSize(packet []byte) ([]byte, error)

func QName 

func QName(msg *dns.Msg) string

func QType 

func QType(msg *dns.Msg) uint16

func Question 

func Question(domain string, qtyp uint16) ([]byte, error)

func RTtl 

func RTtl(msg *dns.Msg) int

func Rcode 

func Rcode(msg *dns.Msg) int

func ReadPrefixed 

func ReadPrefixed(conn *net.Conn) ([]byte, error)

TODO: merge this with doh.Accept

func RefusedResponseFromMessage 

func RefusedResponseFromMessage(srcMsg *dns.Msg) (dstMsg *dns.Msg, err error)

func RemoveEDNS0Options 

func RemoveEDNS0Options(msg *dns.Msg) bool

func Request4FromRequest6 

func Request4FromRequest6(msg6 *dns.Msg) *dns.Msg

func Request4FromResponse6 

func Request4FromResponse6(msg6 *dns.Msg) *dns.Msg

func RequestFromResponse 

func RequestFromResponse(msg *dns.Msg) *dns.Msg

func Servfail 

func Servfail(q *dns.Msg) *dns.Msg

Servfail returns a SERVFAIL response to the query q.

func Size 

func Size(msg *dns.Msg) int

func StringReverse 

func StringReverse(s string) string

func SubstAAAARecords 

func SubstAAAARecords(out *dns.Msg, subip6s netip.Addr, ttl int) bool

func SubstARecords 

func SubstARecords(out *dns.Msg, subip4s netip.Addr, ttl int) bool

func SubstSVCBRecordIPs 

func SubstSVCBRecordIPs(out *dns.Msg, x dns.SVCBKey, subiphints netip.Addr, ttl int) bool

func Targets 

func Targets(msg *dns.Msg) (targets []string)

func ToIp6Hint 

func ToIp6Hint(answer dns.RR, prefix *net.IPNet) dns.RR

func TruncatedResponse 

func TruncatedResponse(packet []byte) ([]byte, error)

func WithTtl 

func WithTtl(msg *dns.Msg, secs uint32) (ok bool)

Types

type CryptoConstruction 

type CryptoConstruction uint16
const (
	UndefinedConstruction CryptoConstruction = iota
	XSalsa20Poly1305
	XChacha20Poly1305
)

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.