dns

package
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 Go to latest Published: Mar 25, 2022 License: MPL-2.0 Imports: 39 Imported by: 0

Documentation

Overview

Package dns is an implementation of core.DNS feature.

Index

Constants

View Source 
const NextProtoDQ = "doq-i00"

NextProtoDQ - During connection establishment, DNS/QUIC support is indicated by selecting the ALPN token "dq" in the crypto handshake.

Variables

View Source 
var (
	DomainMatchingType_name = map[int32]string{
		0: "Full",
		1: "Subdomain",
		2: "Keyword",
		3: "Regex",
	}
	DomainMatchingType_value = map[string]int32{
		"Full":      0,
		"Subdomain": 1,
		"Keyword":   2,
		"Regex":     3,
	}
)

Enum value maps for DomainMatchingType.

View Source 
var (
	QueryStrategy_name = map[int32]string{
		0: "USE_IP",
		1: "USE_IP4",
		2: "USE_IP6",
	}
	QueryStrategy_value = map[string]int32{
		"USE_IP":  0,
		"USE_IP4": 1,
		"USE_IP6": 2,
	}
)

Enum value maps for QueryStrategy.

View Source 
var File_app_dns_config_proto protoreflect.FileDescriptor

Functions

func Fqdn 

func Fqdn(domain string) string

Fqdn normalizes domain make sure it ends with '.'

Types

type ClassicNameServer 

type ClassicNameServer struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

ClassicNameServer implemented traditional UDP DNS.

func NewClassicNameServer 

func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher) *ClassicNameServer

NewClassicNameServer creates udp server object for remote resolving.

func (*ClassicNameServer) Cleanup 

func (s *ClassicNameServer) Cleanup() error

Cleanup clears expired items from cache

func (*ClassicNameServer) HandleResponse 

func (s *ClassicNameServer) HandleResponse(ctx context.Context, packet *udp_proto.Packet)

HandleResponse handles udp response packet from remote DNS server.

func (*ClassicNameServer) Name 

func (s *ClassicNameServer) Name() string

Name implements Server.

func (*ClassicNameServer) QueryIP 

func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error)

QueryIP implements Server.

type Client 

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

Client is the interface for DNS client.

func NewClient 

func NewClient(ctx context.Context, ns *NameServer, clientIP net.IP, container router.GeoIPMatcherContainer, matcherInfos *[]*DomainMatcherInfo, updateDomainRule func(strmatcher.Matcher, int, []*DomainMatcherInfo) error) (*Client, error)

NewClient creates a DNS client managing a name server with client IP, domain rules and expected IPs.

func NewLocalDNSClient 

func NewLocalDNSClient() *Client

NewLocalDNSClient creates localdns client object for directly lookup in system DNS.

func NewSimpleClient 

func NewSimpleClient(ctx context.Context, endpoint *net.Endpoint, clientIP net.IP) (*Client, error)

NewSimpleClient creates a DNS client with a simple destination.

func (*Client) MatchExpectedIPs 

func (c *Client) MatchExpectedIPs(domain string, ips []net.IP) ([]net.IP, error)

MatchExpectedIPs matches queried domain IPs with expected IPs and returns matched ones.

func (*Client) Name 

func (c *Client) Name() string

Name returns the server name the client manages.

func (*Client) QueryIP 

func (c *Client) QueryIP(ctx context.Context, domain string, option dns.IPOption, disableCache bool) ([]net.IP, error)

QueryIP sends DNS query to the name server with the client's IP.

type Config 

type Config struct {

	// Nameservers used by this DNS. Only traditional UDP servers are support at
	// the moment. A special value 'localhost' as a domain address can be set to
	// use DNS on local system.
	//
	// Deprecated: Do not use.
	NameServers []*net.Endpoint `protobuf:"bytes,1,rep,name=NameServers,proto3" json:"NameServers,omitempty"`
	// NameServer list used by this DNS client.
	NameServer []*NameServer `protobuf:"bytes,5,rep,name=name_server,json=nameServer,proto3" json:"name_server,omitempty"`
	// Static hosts. Domain to IP.
	// Deprecated. Use static_hosts.
	//
	// Deprecated: Do not use.
	Hosts map[string]*net.IPOrDomain `` /* 151-byte string literal not displayed */
	// Client IP for EDNS client subnet. Must be 4 bytes (IPv4) or 16 bytes
	// (IPv6).
	ClientIp    []byte                `protobuf:"bytes,3,opt,name=client_ip,json=clientIp,proto3" json:"client_ip,omitempty"`
	StaticHosts []*Config_HostMapping `protobuf:"bytes,4,rep,name=static_hosts,json=staticHosts,proto3" json:"static_hosts,omitempty"`
	// Tag is the inbound tag of DNS client.
	Tag string `protobuf:"bytes,6,opt,name=tag,proto3" json:"tag,omitempty"`
	// DisableCache disables DNS cache
	DisableCache           bool          `protobuf:"varint,8,opt,name=disableCache,proto3" json:"disableCache,omitempty"`
	QueryStrategy          QueryStrategy `` /* 133-byte string literal not displayed */
	DisableFallback        bool          `protobuf:"varint,10,opt,name=disableFallback,proto3" json:"disableFallback,omitempty"`
	DisableFallbackIfMatch bool          `protobuf:"varint,11,opt,name=disableFallbackIfMatch,proto3" json:"disableFallbackIfMatch,omitempty"`
	// contains filtered or unexported fields
}

func (*Config) Descriptor deprecated 

func (*Config) Descriptor() ([]byte, []int)

Deprecated: Use Config.ProtoReflect.Descriptor instead.

func (*Config) GetClientIp 

func (x *Config) GetClientIp() []byte

func (*Config) GetDisableCache 

func (x *Config) GetDisableCache() bool

func (*Config) GetDisableFallback 

func (x *Config) GetDisableFallback() bool

func (*Config) GetDisableFallbackIfMatch 

func (x *Config) GetDisableFallbackIfMatch() bool

func (*Config) GetHosts deprecated 

func (x *Config) GetHosts() map[string]*net.IPOrDomain

Deprecated: Do not use.

func (*Config) GetNameServer 

func (x *Config) GetNameServer() []*NameServer

func (*Config) GetNameServers deprecated 

func (x *Config) GetNameServers() []*net.Endpoint

Deprecated: Do not use.

func (*Config) GetQueryStrategy 

func (x *Config) GetQueryStrategy() QueryStrategy

func (*Config) GetStaticHosts 

func (x *Config) GetStaticHosts() []*Config_HostMapping

func (*Config) GetTag 

func (x *Config) GetTag() string

func (*Config) ProtoMessage 

func (*Config) ProtoMessage()

func (*Config) ProtoReflect 

func (x *Config) ProtoReflect() protoreflect.Message

func (*Config) Reset 

func (x *Config) Reset()

func (*Config) String 

func (x *Config) String() string

type Config_HostMapping 

type Config_HostMapping struct {
	Type   DomainMatchingType `protobuf:"varint,1,opt,name=type,proto3,enum=xray.app.dns.DomainMatchingType" json:"type,omitempty"`
	Domain string             `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
	Ip     [][]byte           `protobuf:"bytes,3,rep,name=ip,proto3" json:"ip,omitempty"`
	// ProxiedDomain indicates the mapped domain has the same IP address on this
	// domain. Xray will use this domain for IP queries.
	ProxiedDomain string `protobuf:"bytes,4,opt,name=proxied_domain,json=proxiedDomain,proto3" json:"proxied_domain,omitempty"`
	// contains filtered or unexported fields
}

func (*Config_HostMapping) Descriptor deprecated 

func (*Config_HostMapping) Descriptor() ([]byte, []int)

Deprecated: Use Config_HostMapping.ProtoReflect.Descriptor instead.

func (*Config_HostMapping) GetDomain 

func (x *Config_HostMapping) GetDomain() string

func (*Config_HostMapping) GetIp 

func (x *Config_HostMapping) GetIp() [][]byte

func (*Config_HostMapping) GetProxiedDomain 

func (x *Config_HostMapping) GetProxiedDomain() string

func (*Config_HostMapping) GetType 

func (x *Config_HostMapping) GetType() DomainMatchingType

func (*Config_HostMapping) ProtoMessage 

func (*Config_HostMapping) ProtoMessage()

func (*Config_HostMapping) ProtoReflect 

func (x *Config_HostMapping) ProtoReflect() protoreflect.Message

func (*Config_HostMapping) Reset 

func (x *Config_HostMapping) Reset()

func (*Config_HostMapping) String 

func (x *Config_HostMapping) String() string

type DNS 

type DNS struct {
	sync.Mutex
	// contains filtered or unexported fields
}

DNS is a DNS rely server.

func New 

func New(ctx context.Context, config *Config) (*DNS, error)

New creates a new DNS server with given configuration.

func (*DNS) Close 

func (s *DNS) Close() error

Close implements common.Closable.

func (*DNS) GetIPOption 

func (s *DNS) GetIPOption() *dns.IPOption

GetIPOption implements ClientWithIPOption. 

func (s *DNS) IsOwnLink(ctx context.Context) bool

IsOwnLink implements proxy.dns.ownLinkVerifier

func (*DNS) LookupHosts 

func (s *DNS) LookupHosts(domain string) *net.Address

LookupHosts implements dns.HostsLookup.

func (*DNS) LookupIP 

func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, error)

LookupIP implements dns.Client.

func (*DNS) SetFakeDNSOption 

func (s *DNS) SetFakeDNSOption(isFakeEnable bool)

SetFakeDNSOption implements ClientWithIPOption.

func (*DNS) SetQueryOption 

func (s *DNS) SetQueryOption(isIPv4Enable, isIPv6Enable bool)

SetQueryOption implements ClientWithIPOption.

func (*DNS) Start 

func (s *DNS) Start() error

Start implements common.Runnable.

func (*DNS) Type 

func (*DNS) Type() interface{}

Type implements common.HasType.

type DoHNameServer 

type DoHNameServer struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

DoHNameServer implemented DNS over HTTPS (RFC8484) Wire Format, which is compatible with traditional dns over udp(RFC1035), thus most of the DOH implementation is copied from udpns.go

func NewDoHLocalNameServer 

func NewDoHLocalNameServer(url *url.URL) *DoHNameServer

NewDoHLocalNameServer creates DOH client object for local resolving

func NewDoHNameServer 

func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher) (*DoHNameServer, error)

NewDoHNameServer creates DOH server object for remote resolving.

func (*DoHNameServer) Cleanup 

func (s *DoHNameServer) Cleanup() error

Cleanup clears expired items from cache

func (*DoHNameServer) Name 

func (s *DoHNameServer) Name() string

Name implements Server.

func (*DoHNameServer) QueryIP 

func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error)

QueryIP implements Server.

type DomainMatcherInfo 

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

DomainMatcherInfo contains information attached to index returned by Server.domainMatcher

type DomainMatchingType 

type DomainMatchingType int32
const (
	DomainMatchingType_Full      DomainMatchingType = 0
	DomainMatchingType_Subdomain DomainMatchingType = 1
	DomainMatchingType_Keyword   DomainMatchingType = 2
	DomainMatchingType_Regex     DomainMatchingType = 3
)

func (DomainMatchingType) Descriptor 

func (DomainMatchingType) Descriptor() protoreflect.EnumDescriptor

func (DomainMatchingType) Enum 

func (x DomainMatchingType) Enum() *DomainMatchingType

func (DomainMatchingType) EnumDescriptor deprecated 

func (DomainMatchingType) EnumDescriptor() ([]byte, []int)

Deprecated: Use DomainMatchingType.Descriptor instead.

func (DomainMatchingType) Number 

func (x DomainMatchingType) Number() protoreflect.EnumNumber

func (DomainMatchingType) String 

func (x DomainMatchingType) String() string

func (DomainMatchingType) Type 

func (DomainMatchingType) Type() protoreflect.EnumType

type FakeDNSServer 

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

func NewFakeDNSServer 

func NewFakeDNSServer() *FakeDNSServer

func (FakeDNSServer) Name 

func (FakeDNSServer) Name() string

func (*FakeDNSServer) QueryIP 

func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ net.IP, opt dns.IPOption, _ bool) ([]net.IP, error)

type IPRecord 

type IPRecord struct {
	ReqID  uint16
	IP     []net.Address
	Expire time.Time
	RCode  dnsmessage.RCode
}

IPRecord is a cacheable item for a resolved domain

type LocalNameServer 

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

LocalNameServer is an wrapper over local DNS feature.

func NewLocalNameServer 

func NewLocalNameServer() *LocalNameServer

NewLocalNameServer creates localdns server object for directly lookup in system DNS.

func (*LocalNameServer) Name 

func (s *LocalNameServer) Name() string

Name implements Server.

func (*LocalNameServer) QueryIP 

func (s *LocalNameServer) QueryIP(_ context.Context, domain string, _ net.IP, option dns.IPOption, _ bool) (ips []net.IP, err error)

QueryIP implements Server.

type NameServer 

type NameServer struct {
	Address           *net.Endpoint                `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
	ClientIp          []byte                       `protobuf:"bytes,5,opt,name=client_ip,json=clientIp,proto3" json:"client_ip,omitempty"`
	SkipFallback      bool                         `protobuf:"varint,6,opt,name=skipFallback,proto3" json:"skipFallback,omitempty"`
	PrioritizedDomain []*NameServer_PriorityDomain `protobuf:"bytes,2,rep,name=prioritized_domain,json=prioritizedDomain,proto3" json:"prioritized_domain,omitempty"`
	Geoip             []*router.GeoIP              `protobuf:"bytes,3,rep,name=geoip,proto3" json:"geoip,omitempty"`
	OriginalRules     []*NameServer_OriginalRule   `protobuf:"bytes,4,rep,name=original_rules,json=originalRules,proto3" json:"original_rules,omitempty"`
	// contains filtered or unexported fields
}

func (*NameServer) Descriptor deprecated 

func (*NameServer) Descriptor() ([]byte, []int)

Deprecated: Use NameServer.ProtoReflect.Descriptor instead.

func (*NameServer) GetAddress 

func (x *NameServer) GetAddress() *net.Endpoint

func (*NameServer) GetClientIp 

func (x *NameServer) GetClientIp() []byte

func (*NameServer) GetGeoip 

func (x *NameServer) GetGeoip() []*router.GeoIP

func (*NameServer) GetOriginalRules 

func (x *NameServer) GetOriginalRules() []*NameServer_OriginalRule

func (*NameServer) GetPrioritizedDomain 

func (x *NameServer) GetPrioritizedDomain() []*NameServer_PriorityDomain

func (*NameServer) GetSkipFallback 

func (x *NameServer) GetSkipFallback() bool

func (*NameServer) ProtoMessage 

func (*NameServer) ProtoMessage()

func (*NameServer) ProtoReflect 

func (x *NameServer) ProtoReflect() protoreflect.Message

func (*NameServer) Reset 

func (x *NameServer) Reset()

func (*NameServer) String 

func (x *NameServer) String() string

type NameServer_OriginalRule 

type NameServer_OriginalRule struct {
	Rule string `protobuf:"bytes,1,opt,name=rule,proto3" json:"rule,omitempty"`
	Size uint32 `protobuf:"varint,2,opt,name=size,proto3" json:"size,omitempty"`
	// contains filtered or unexported fields
}

func (*NameServer_OriginalRule) Descriptor deprecated 

func (*NameServer_OriginalRule) Descriptor() ([]byte, []int)

Deprecated: Use NameServer_OriginalRule.ProtoReflect.Descriptor instead.

func (*NameServer_OriginalRule) GetRule 

func (x *NameServer_OriginalRule) GetRule() string

func (*NameServer_OriginalRule) GetSize 

func (x *NameServer_OriginalRule) GetSize() uint32

func (*NameServer_OriginalRule) ProtoMessage 

func (*NameServer_OriginalRule) ProtoMessage()

func (*NameServer_OriginalRule) ProtoReflect 

func (x *NameServer_OriginalRule) ProtoReflect() protoreflect.Message

func (*NameServer_OriginalRule) Reset 

func (x *NameServer_OriginalRule) Reset()

func (*NameServer_OriginalRule) String 

func (x *NameServer_OriginalRule) String() string

type NameServer_PriorityDomain 

type NameServer_PriorityDomain struct {
	Type   DomainMatchingType `protobuf:"varint,1,opt,name=type,proto3,enum=xray.app.dns.DomainMatchingType" json:"type,omitempty"`
	Domain string             `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
	// contains filtered or unexported fields
}

func (*NameServer_PriorityDomain) Descriptor deprecated 

func (*NameServer_PriorityDomain) Descriptor() ([]byte, []int)

Deprecated: Use NameServer_PriorityDomain.ProtoReflect.Descriptor instead.

func (*NameServer_PriorityDomain) GetDomain 

func (x *NameServer_PriorityDomain) GetDomain() string

func (*NameServer_PriorityDomain) GetType 

func (x *NameServer_PriorityDomain) GetType() DomainMatchingType

func (*NameServer_PriorityDomain) ProtoMessage 

func (*NameServer_PriorityDomain) ProtoMessage()

func (*NameServer_PriorityDomain) ProtoReflect 

func (x *NameServer_PriorityDomain) ProtoReflect() protoreflect.Message

func (*NameServer_PriorityDomain) Reset 

func (x *NameServer_PriorityDomain) Reset()

func (*NameServer_PriorityDomain) String 

func (x *NameServer_PriorityDomain) String() string

type QUICNameServer 

type QUICNameServer struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

QUICNameServer implemented DNS over QUIC

func NewQUICNameServer 

func NewQUICNameServer(url *url.URL) (*QUICNameServer, error)

NewQUICNameServer creates DNS-over-QUIC client object for local resolving

func (*QUICNameServer) Cleanup 

func (s *QUICNameServer) Cleanup() error

Cleanup clears expired items from cache

func (*QUICNameServer) Name 

func (s *QUICNameServer) Name() string

Name returns client name

func (*QUICNameServer) QueryIP 

func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error)

QueryIP is called from dns.Server->queryIPTimeout

type QueryStrategy 

type QueryStrategy int32
const (
	QueryStrategy_USE_IP  QueryStrategy = 0
	QueryStrategy_USE_IP4 QueryStrategy = 1
	QueryStrategy_USE_IP6 QueryStrategy = 2
)

func (QueryStrategy) Descriptor 

func (QueryStrategy) Descriptor() protoreflect.EnumDescriptor

func (QueryStrategy) Enum 

func (x QueryStrategy) Enum() *QueryStrategy

func (QueryStrategy) EnumDescriptor deprecated 

func (QueryStrategy) EnumDescriptor() ([]byte, []int)

Deprecated: Use QueryStrategy.Descriptor instead.

func (QueryStrategy) Number 

func (x QueryStrategy) Number() protoreflect.EnumNumber

func (QueryStrategy) String 

func (x QueryStrategy) String() string

func (QueryStrategy) Type 

func (QueryStrategy) Type() protoreflect.EnumType

type Server 

type Server interface {
	// Name of the Client.
	Name() string
	// QueryIP sends IP queries to its configured server.
	QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns.IPOption, disableCache bool) ([]net.IP, error)
}

Server is the interface for Name Server.

func NewServer 

func NewServer(dest net.Destination, dispatcher routing.Dispatcher) (Server, error)

NewServer creates a name server object according to the network destination url.

type StaticHosts 

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

StaticHosts represents static domain-ip mapping in DNS server.

func NewStaticHosts 

func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDomain) (*StaticHosts, error)

NewStaticHosts creates a new StaticHosts instance.

func (*StaticHosts) Lookup 

func (h *StaticHosts) Lookup(domain string, option dns.IPOption) []net.Address

Lookup returns IP addresses or proxied domain for the given domain, if exists in this StaticHosts.

type TCPNameServer 

type TCPNameServer struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

TCPNameServer implemented DNS over TCP (RFC7766).

func NewTCPLocalNameServer 

func NewTCPLocalNameServer(url *url.URL) (*TCPNameServer, error)

NewTCPLocalNameServer creates DNS over TCP client object for local resolving

func NewTCPNameServer 

func NewTCPNameServer(url *url.URL, dispatcher routing.Dispatcher) (*TCPNameServer, error)

NewTCPNameServer creates DNS over TCP server object for remote resolving.

func (*TCPNameServer) Cleanup 

func (s *TCPNameServer) Cleanup() error

Cleanup clears expired items from cache

func (*TCPNameServer) Name 

func (s *TCPNameServer) Name() string

Name implements Server.

func (*TCPNameServer) QueryIP 

func (s *TCPNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error)

QueryIP implements Server.

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