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Code Issues Releases Wiki Activity

Feat: add disableFallback & skipFallback option for DNS (#864)

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Loyalsoldier 2021-04-09 10:35:26 +08:00 committed by GitHub
parent f71b45f3e7
commit 3f40089caf
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 184 additions and 136 deletions
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191
app/dns/config.pb.go
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@ -130,6 +130,7 @@ type NameServer struct {
Address *net.Endpoint `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"` 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"` 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"` 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"` 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"` OriginalRules []*NameServer_OriginalRule `protobuf:"bytes,4,rep,name=original_rules,json=originalRules,proto3" json:"original_rules,omitempty"`
@ -181,6 +182,13 @@ func (x *NameServer) GetClientIp() []byte {
return nil return nil
} }
func (x *NameServer) GetSkipFallback() bool {
if x != nil {
return x.SkipFallback
}
return false
}
func (x *NameServer) GetPrioritizedDomain() []*NameServer_PriorityDomain { func (x *NameServer) GetPrioritizedDomain() []*NameServer_PriorityDomain {
if x != nil { if x != nil {
return x.PrioritizedDomain return x.PrioritizedDomain
@ -226,9 +234,10 @@ type Config struct {
StaticHosts []*Config_HostMapping `protobuf:"bytes,4,rep,name=static_hosts,json=staticHosts,proto3" json:"static_hosts,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 is the inbound tag of DNS client.
Tag string `protobuf:"bytes,6,opt,name=tag,proto3" json:"tag,omitempty"` Tag string `protobuf:"bytes,6,opt,name=tag,proto3" json:"tag,omitempty"`
// DisableCache Disable DNS cache // DisableCache disables DNS cache
DisableCache bool `protobuf:"varint,8,opt,name=disableCache,proto3" json:"disableCache,omitempty"` DisableCache bool `protobuf:"varint,8,opt,name=disableCache,proto3" json:"disableCache,omitempty"`
QueryStrategy QueryStrategy `protobuf:"varint,9,opt,name=query_strategy,json=queryStrategy,proto3,enum=v2ray.core.app.dns.QueryStrategy" json:"query_strategy,omitempty"` QueryStrategy QueryStrategy `protobuf:"varint,9,opt,name=query_strategy,json=queryStrategy,proto3,enum=v2ray.core.app.dns.QueryStrategy" json:"query_strategy,omitempty"`
DisableFallback bool `protobuf:"varint,10,opt,name=disableFallback,proto3" json:"disableFallback,omitempty"`
} }
func (x *Config) Reset() { func (x *Config) Reset() {
@ -321,6 +330,13 @@ func (x *Config) GetQueryStrategy() QueryStrategy {
return QueryStrategy_USE_IP return QueryStrategy_USE_IP
} }
func (x *Config) GetDisableFallback() bool {
if x != nil {
return x.DisableFallback
}
return false
}
type NameServer_PriorityDomain struct { type NameServer_PriorityDomain struct {
state protoimpl.MessageState state protoimpl.MessageState
sizeCache protoimpl.SizeCache sizeCache protoimpl.SizeCache
@ -515,95 +531,100 @@ var file_app_dns_config_proto_rawDesc = []byte{
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} }
var ( var (

5
app/dns/config.proto
View File

@ -13,6 +13,7 @@ import "app/router/config.proto";
message NameServer { message NameServer {
v2ray.core.common.net.Endpoint address = 1; v2ray.core.common.net.Endpoint address = 1;
bytes client_ip = 5; bytes client_ip = 5;
bool skipFallback = 6;
message PriorityDomain { message PriorityDomain {
DomainMatchingType type = 1; DomainMatchingType type = 1;
@ -78,8 +79,10 @@ message Config {
reserved 7; reserved 7;
// DisableCache Disable DNS cache // DisableCache disables DNS cache
bool disableCache = 8; bool disableCache = 8;
QueryStrategy query_strategy = 9; QueryStrategy query_strategy = 9;
bool disableFallback = 10;
} }

57
app/dns/dns.go
View File

@ -24,14 +24,15 @@ import (
// DNS is a DNS rely server. // DNS is a DNS rely server.
type DNS struct { type DNS struct {
sync.Mutex sync.Mutex
tag string tag string
disableCache bool disableCache bool
ipOption *dns.IPOption disableFallback bool
hosts *StaticHosts ipOption *dns.IPOption
clients []*Client hosts *StaticHosts
ctx context.Context clients []*Client
domainMatcher strmatcher.IndexMatcher ctx context.Context
matcherInfos []DomainMatcherInfo domainMatcher strmatcher.IndexMatcher
matcherInfos []DomainMatcherInfo
} }
// DomainMatcherInfo contains information attached to index returned by Server.domainMatcher // DomainMatcherInfo contains information attached to index returned by Server.domainMatcher
@ -133,14 +134,15 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
} }
return &DNS{ return &DNS{
tag: tag, tag: tag,
hosts: hosts, hosts: hosts,
ipOption: ipOption, ipOption: ipOption,
clients: clients, clients: clients,
ctx: ctx, ctx: ctx,
domainMatcher: domainMatcher, domainMatcher: domainMatcher,
matcherInfos: matcherInfos, matcherInfos: matcherInfos,
disableCache: config.DisableCache, disableCache: config.DisableCache,
disableFallback: config.DisableFallback,
}, nil }, nil
} }
@ -276,14 +278,16 @@ func (s *DNS) sortClients(domain string) []*Client {
clientNames = append(clientNames, client.Name()) clientNames = append(clientNames, client.Name())
} }
// Default round-robin query if !s.disableFallback {
for idx, client := range s.clients { // Default round-robin query
if clientUsed[idx] { for idx, client := range s.clients {
continue if clientUsed[idx] || client.skipFallback {
continue
}
clientUsed[idx] = true
clients = append(clients, client)
clientNames = append(clientNames, client.Name())
} }
clientUsed[idx] = true
clients = append(clients, client)
clientNames = append(clientNames, client.Name())
} }
if len(domainRules) > 0 { if len(domainRules) > 0 {
@ -292,6 +296,13 @@ func (s *DNS) sortClients(domain string) []*Client {
if len(clientNames) > 0 { if len(clientNames) > 0 {
newError("domain ", domain, " will use DNS in order: ", clientNames).AtDebug().WriteToLog() newError("domain ", domain, " will use DNS in order: ", clientNames).AtDebug().WriteToLog()
} }
if len(clients) == 0 {
clients = append(clients, s.clients[0])
clientNames = append(clientNames, s.clients[0].Name())
newError("domain ", domain, " will use the first DNS: ", clientNames).AtDebug().WriteToLog()
}
return clients return clients
} }

11
app/dns/nameserver.go
View File

@ -27,10 +27,11 @@ type Server interface {
// Client is the interface for DNS client. // Client is the interface for DNS client.
type Client struct { type Client struct {
server Server server Server
clientIP net.IP clientIP net.IP
domains []string skipFallback bool
expectIPs []*router.GeoIPMatcher domains []string
expectIPs []*router.GeoIPMatcher
} }
var errExpectedIPNonMatch = errors.New("expectIPs not match") var errExpectedIPNonMatch = errors.New("expectIPs not match")
@ -67,6 +68,7 @@ func NewServer(dest net.Destination, dispatcher routing.Dispatcher) (Server, err
// NewClient creates a DNS client managing a name server with client IP, domain rules and expected IPs. // NewClient creates a DNS client managing a name server with client IP, domain rules and expected IPs.
func NewClient(ctx context.Context, ns *NameServer, clientIP net.IP, container router.GeoIPMatcherContainer, matcherInfos *[]DomainMatcherInfo, updateDomainRule func(strmatcher.Matcher, int, []DomainMatcherInfo) error) (*Client, error) { func NewClient(ctx context.Context, ns *NameServer, clientIP net.IP, container router.GeoIPMatcherContainer, matcherInfos *[]DomainMatcherInfo, updateDomainRule func(strmatcher.Matcher, int, []DomainMatcherInfo) error) (*Client, error) {
client := &Client{} client := &Client{}
err := core.RequireFeatures(ctx, func(dispatcher routing.Dispatcher) error { err := core.RequireFeatures(ctx, func(dispatcher routing.Dispatcher) error {
// Create a new server for each client for now // Create a new server for each client for now
server, err := NewServer(ns.Address.AsDestination(), dispatcher) server, err := NewServer(ns.Address.AsDestination(), dispatcher)
@ -144,6 +146,7 @@ func NewClient(ctx context.Context, ns *NameServer, clientIP net.IP, container r
client.server = server client.server = server
client.clientIP = clientIP client.clientIP = clientIP
client.skipFallback = ns.SkipFallback
client.domains = rules client.domains = rules
client.expectIPs = matchers client.expectIPs = matchers
return nil return nil

42
infra/conf/dns.go
View File

@ -11,11 +11,12 @@ import (
) )
type NameServerConfig struct { type NameServerConfig struct {
Address *Address Address *Address
ClientIP *Address ClientIP *Address
Port uint16 Port uint16
Domains []string SkipFallback bool
ExpectIPs StringList Domains []string
ExpectIPs StringList
} }
func (c *NameServerConfig) UnmarshalJSON(data []byte) error { func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
@ -26,16 +27,18 @@ func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
} }
var advanced struct { var advanced struct {
Address *Address `json:"address"` Address *Address `json:"address"`
ClientIP *Address `json:"clientIp"` ClientIP *Address `json:"clientIp"`
Port uint16 `json:"port"` Port uint16 `json:"port"`
Domains []string `json:"domains"` SkipFallback bool `json:"skipFallback"`
ExpectIPs StringList `json:"expectIps"` Domains []string `json:"domains"`
ExpectIPs StringList `json:"expectIps"`
} }
if err := json.Unmarshal(data, &advanced); err == nil { if err := json.Unmarshal(data, &advanced); err == nil {
c.Address = advanced.Address c.Address = advanced.Address
c.ClientIP = advanced.ClientIP c.ClientIP = advanced.ClientIP
c.Port = advanced.Port c.Port = advanced.Port
c.SkipFallback = advanced.SkipFallback
c.Domains = advanced.Domains c.Domains = advanced.Domains
c.ExpectIPs = advanced.ExpectIPs c.ExpectIPs = advanced.ExpectIPs
return nil return nil
@ -105,6 +108,7 @@ func (c *NameServerConfig) Build() (*dns.NameServer, error) {
Port: uint32(c.Port), Port: uint32(c.Port),
}, },
ClientIp: myClientIP, ClientIp: myClientIP,
SkipFallback: c.SkipFallback,
PrioritizedDomain: domains, PrioritizedDomain: domains,
Geoip: geoipList, Geoip: geoipList,
OriginalRules: originalRules, OriginalRules: originalRules,
@ -120,12 +124,13 @@ var typeMap = map[router.Domain_Type]dns.DomainMatchingType{
// DNSConfig is a JSON serializable object for dns.Config. // DNSConfig is a JSON serializable object for dns.Config.
type DNSConfig struct { type DNSConfig struct {
Servers []*NameServerConfig `json:"servers"` Servers []*NameServerConfig `json:"servers"`
Hosts map[string]*Address `json:"hosts"` Hosts map[string]*Address `json:"hosts"`
ClientIP *Address `json:"clientIp"` ClientIP *Address `json:"clientIp"`
Tag string `json:"tag"` Tag string `json:"tag"`
QueryStrategy string `json:"queryStrategy"` QueryStrategy string `json:"queryStrategy"`
DisableCache bool `json:"disableCache"` DisableCache bool `json:"disableCache"`
DisableFallback bool `json:"disableFallback"`
} }
func getHostMapping(addr *Address) *dns.Config_HostMapping { func getHostMapping(addr *Address) *dns.Config_HostMapping {
@ -142,8 +147,9 @@ func getHostMapping(addr *Address) *dns.Config_HostMapping {
// Build implements Buildable // Build implements Buildable
func (c *DNSConfig) Build() (*dns.Config, error) { func (c *DNSConfig) Build() (*dns.Config, error) {
config := &dns.Config{ config := &dns.Config{
Tag: c.Tag, Tag: c.Tag,
DisableCache: c.DisableCache, DisableCache: c.DisableCache,
DisableFallback: c.DisableFallback,
} }
if c.ClientIP != nil { if c.ClientIP != nil {

14
infra/conf/dns_test.go
View File

@ -64,6 +64,7 @@ func TestDNSConfigParsing(t *testing.T) {
"address": "8.8.8.8", "address": "8.8.8.8",
"clientIp": "10.0.0.1", "clientIp": "10.0.0.1",
"port": 5353, "port": 5353,
"skipFallback": true,
"domains": ["domain:v2fly.org"] "domains": ["domain:v2fly.org"]
}], }],
"hosts": { "hosts": {
@ -75,7 +76,8 @@ func TestDNSConfigParsing(t *testing.T) {
}, },
"clientIp": "10.0.0.1", "clientIp": "10.0.0.1",
"queryStrategy": "UseIPv4", "queryStrategy": "UseIPv4",
"disableCache": true "disableCache": true,
"disableFallback": true
}`, }`,
Parser: parserCreator(), Parser: parserCreator(),
Output: &dns.Config{ Output: &dns.Config{
@ -90,7 +92,8 @@ func TestDNSConfigParsing(t *testing.T) {
Network: net.Network_UDP, Network: net.Network_UDP,
Port: 5353, Port: 5353,
}, },
ClientIp: []byte{10, 0, 0, 1}, ClientIp: []byte{10, 0, 0, 1},
SkipFallback: true,
PrioritizedDomain: []*dns.NameServer_PriorityDomain{ PrioritizedDomain: []*dns.NameServer_PriorityDomain{
{ {
Type: dns.DomainMatchingType_Subdomain, Type: dns.DomainMatchingType_Subdomain,
@ -132,9 +135,10 @@ func TestDNSConfigParsing(t *testing.T) {
Ip: [][]byte{{127, 0, 0, 1}}, Ip: [][]byte{{127, 0, 0, 1}},
}, },
}, },
ClientIp: []byte{10, 0, 0, 1}, ClientIp: []byte{10, 0, 0, 1},
QueryStrategy: dns.QueryStrategy_USE_IP4, QueryStrategy: dns.QueryStrategy_USE_IP4,
DisableCache: true, DisableCache: true,
DisableFallback: true,
}, },
}, },
}) })