dnsx

type Cacher interface {
	Transport
	Clear()
}

type DNS64 interface {
	// Add64 registers DNS64 resolver f to id.
	Add64(id string) bool
	// Remove64 deregisters any current resolver from id.
	Remove64(id string) bool
	// ResetNat64Prefix sets the NAT64 prefix for transport id to ip6prefix.
	ResetNat64Prefix(ip6prefix string) bool
	// D64 synthesizes ans64 (AAAA) from ans6 if required, using resolver f.
	// Returned ans64 is nil if no DNS64 synthesis is needed (not AAAA).
	// Returned ans64 is ans6 if it already has AAAA records.
	D64(network, id, uid string, ans6 *dns.Msg) *dns.Msg
}

type Gateway interface {
	// given an alg or real ip, retrieves assoc real ips as csv, if any
	X(maybeAlg netip.Addr, uid string, tids ...string) (realips []netip.Addr, undidAlg bool)
	// given an alg or real ip, retrieves assoc dns names as csv, if any
	PTR(maybeAlg netip.Addr, uid, tid string, force bool) (domaincsv string, didForce bool)
	// given domain, retrieve assoc alg ips or real ips as csv, if any
	RESOLV(domain, uid, tid string) []netip.Addr
	// given an alg or real ip, retrieve assoc blocklists as csv, if any
	RDNSBL(maybeAlg netip.Addr) (blocklistcsv string)

	// S reveals internal state for debugging
	S() string
	// contains filtered or unexported methods
}

type MDNSTransport interface {
	Transport
	RefreshProto(protos string)
}

type NAT64 interface {
	// Returns true if ip is a NAT64 address from transport id.
	IsNat64(id string, ip netip.Addr) bool
	// Translates ip to IPv4 using the NAT64 prefix for transport id.
	// As a special case, ip is zero addr, output is always IPv4 zero addr.
	X64(id string, ip netip.Addr) netip.Addr
}

type NatPt interface {
	DNS64
	NAT64
}

type QueryError struct {
	// contains filtered or unexported fields
}

type RDNS interface {
	x.RDNS
	OnDeviceBlock() bool // Mode
	// contains filtered or unexported methods
}

type RdnsResolver interface {
	x.RDNSResolver
	// contains filtered or unexported methods
}

type Resolver interface {
	TransportProviderInternal
	TransportMultProviderInternal
	TransportMultInternal
	ResolverSelf
	RdnsResolver
	NatPt

	// IsDnsAddr returns true if the ip:port is resolver's fake endpoint
	IsDnsAddr(ipport netip.AddrPort) bool
	// Serve reads DNS query from conn and writes DNS answer to conn.
	// fid is the flow ID that spawned this DNS query, if Origin is "tunnel".
	Serve(proto string, conn protect.Conn, uid, fid string) (rx, tx int64, errs []error)

	// Gateway implements a DNS ALG transport
	Gateway() Gateway
	// MDNS returns the mdns transport, if available; error otherwise.
	MDNS() (MDNSTransport, error)

	// StopAll stops all transports.
	StopAll()

	// S reveals internal state for debugging
	S() string
}

type ResolverSelf interface {
	// LocalLookup performs resolution on Default and/or Goos DNSes.
	// To be only used by protect.UidSelf.
	LocalLookup(q []byte) (a []byte, tid string, err error)
	// LookupFor performs resolution for uid.
	LookupFor(q []byte, uid string) (a []byte, tid string, err error)
	// Lookup performs resolution on chosen Transport for uid.
	LookupFor2(q []byte, uid string, chosen ...string) (a []byte, tid string, err error)
}

type Transport interface {
	x.DNSTransport
	// Given a DNS query (including ID), returns a DNS response with matching
	// ID, or an error if no response was received.  The error may be accompanied
	// by a SERVFAIL response if appropriate.
	Query(network string, q *dns.Msg, summary *x.DNSSummary) (*dns.Msg, error)
	// IPPorts returns all ip:ports of this server.
	IPPorts() []netip.AddrPort
	// Stop closes the transport.
	Stop() error
}

type TransportMult interface {
	TransportMultInternal
	Transport
}

type TransportMultInternal interface {
	x.DNSTransportMult
	TransportProviderInternal
}

type TransportMultProviderInternal interface {
	x.DNSTransportMultProvider
	// GetMultInternal returns multi-transport, if available
	GetMultInternal(id string) (TransportMult, error)
}

type TransportProviderInternal interface {
	x.DNSTransportProvider
	// GetInternal returns the internal transport interface for the given ID.
	GetInternal(id string) (Transport, error)
}