Feat: add disableFallback & skipFallback option for DNS client (#489)

This commit is contained in:
秋のかえで 2021-04-10 00:07:08 +08:00 committed by GitHub
parent 70b63e21a5
commit 6e902b24ae
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
6 changed files with 191 additions and 145 deletions

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@ -1,7 +1,7 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.25.0
// protoc v3.15.6
// protoc v3.15.8
// source: app/dns/config.proto
package dns
@ -184,6 +184,7 @@ 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"`
@ -235,6 +236,13 @@ func (x *NameServer) GetClientIp() []byte {
return nil
}
func (x *NameServer) GetSkipFallback() bool {
if x != nil {
return x.SkipFallback
}
return false
}
func (x *NameServer) GetPrioritizedDomain() []*NameServer_PriorityDomain {
if x != nil {
return x.PrioritizedDomain
@ -280,9 +288,10 @@ type Config struct {
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 Disable DNS cache
CacheStrategy CacheStrategy `protobuf:"varint,8,opt,name=cache_strategy,json=cacheStrategy,proto3,enum=xray.app.dns.CacheStrategy" json:"cache_strategy,omitempty"`
QueryStrategy QueryStrategy `protobuf:"varint,9,opt,name=query_strategy,json=queryStrategy,proto3,enum=xray.app.dns.QueryStrategy" json:"query_strategy,omitempty"`
// DisableCache disables DNS cache
CacheStrategy CacheStrategy `protobuf:"varint,8,opt,name=cache_strategy,json=cacheStrategy,proto3,enum=xray.app.dns.CacheStrategy" json:"cache_strategy,omitempty"`
QueryStrategy QueryStrategy `protobuf:"varint,9,opt,name=query_strategy,json=queryStrategy,proto3,enum=xray.app.dns.QueryStrategy" json:"query_strategy,omitempty"`
DisableFallback bool `protobuf:"varint,10,opt,name=disableFallback,proto3" json:"disableFallback,omitempty"`
}
func (x *Config) Reset() {
@ -375,6 +384,13 @@ func (x *Config) GetQueryStrategy() QueryStrategy {
return QueryStrategy_USE_IP
}
func (x *Config) GetDisableFallback() bool {
if x != nil {
return x.DisableFallback
}
return false
}
type NameServer_PriorityDomain struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -569,96 +585,101 @@ var file_app_dns_config_proto_rawDesc = []byte{
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0x6f, 0x74, 0x6f, 0x33,
}
var (

View file

@ -13,6 +13,7 @@ import "app/router/config.proto";
message NameServer {
xray.common.net.Endpoint address = 1;
bytes client_ip = 5;
bool skipFallback = 6;
message PriorityDomain {
DomainMatchingType type = 1;
@ -84,8 +85,10 @@ message Config {
reserved 7;
// DisableCache Disable DNS cache
// DisableCache disables DNS cache
CacheStrategy cache_strategy = 8;
QueryStrategy query_strategy = 9;
bool disableFallback = 10;
}

View file

@ -22,14 +22,15 @@ import (
// DNS is a DNS rely server.
type DNS struct {
sync.Mutex
tag string
cs CacheStrategy
ipOption *dns.IPOption
hosts *StaticHosts
clients []*Client
ctx context.Context
domainMatcher strmatcher.IndexMatcher
matcherInfos []DomainMatcherInfo
tag string
cs CacheStrategy
disableFallback bool
ipOption *dns.IPOption
hosts *StaticHosts
clients []*Client
ctx context.Context
domainMatcher strmatcher.IndexMatcher
matcherInfos []DomainMatcherInfo
}
// DomainMatcherInfo contains information attached to index returned by Server.domainMatcher
@ -131,14 +132,15 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
}
return &DNS{
tag: tag,
hosts: hosts,
ipOption: ipOption,
clients: clients,
ctx: ctx,
domainMatcher: domainMatcher,
matcherInfos: matcherInfos,
cs: config.CacheStrategy,
tag: tag,
hosts: hosts,
ipOption: ipOption,
clients: clients,
ctx: ctx,
domainMatcher: domainMatcher,
matcherInfos: matcherInfos,
cs: config.CacheStrategy,
disableFallback: config.DisableFallback,
}, nil
}
@ -254,6 +256,11 @@ func (s *DNS) sortClients(domain string, option dns.IPOption) []*Client {
if len(clientNames) > 0 {
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()
}
}()
// Priority domain matching
@ -265,7 +272,6 @@ func (s *DNS) sortClients(domain string, option dns.IPOption) []*Client {
newError("skipping the client " + client.Name()).AtDebug().WriteToLog()
continue
}
domainRules = append(domainRules, fmt.Sprintf("%s(DNS idx:%d)", domainRule, info.clientIdx))
if clientUsed[info.clientIdx] {
continue
@ -275,18 +281,22 @@ func (s *DNS) sortClients(domain string, option dns.IPOption) []*Client {
clientNames = append(clientNames, client.Name())
}
// Default round-robin query
for idx, client := range s.clients {
if clientUsed[idx] {
continue
if !s.disableFallback {
// Default round-robin query
for idx, client := range s.clients {
if clientUsed[idx] || client.skipFallback {
continue
}
if !canQueryOnClient(option, client) {
newError("skipping the client " + client.Name()).AtDebug().WriteToLog()
continue
}
clientUsed[idx] = true
clients = append(clients, client)
clientNames = append(clientNames, client.Name())
}
if !canQueryOnClient(option, client) {
newError("skipping the client " + client.Name()).AtDebug().WriteToLog()
continue
}
clientUsed[idx] = true
clients = append(clients, client)
clientNames = append(clientNames, client.Name())
}
return clients

View file

@ -25,10 +25,11 @@ type Server interface {
// Client is the interface for DNS client.
type Client struct {
server Server
clientIP net.IP
domains []string
expectIPs []*router.GeoIPMatcher
server Server
clientIP net.IP
skipFallback bool
domains []string
expectIPs []*router.GeoIPMatcher
}
var errExpectedIPNonMatch = errors.New("expectIPs not match")
@ -65,6 +66,7 @@ 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.
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{}
err := core.RequireFeatures(ctx, func(dispatcher routing.Dispatcher) error {
// Create a new server for each client for now
server, err := NewServer(ns.Address.AsDestination(), dispatcher)

View file

@ -11,11 +11,12 @@ import (
)
type NameServerConfig struct {
Address *Address
ClientIP *Address
Port uint16
Domains []string
ExpectIPs StringList
Address *Address
ClientIP *Address
Port uint16
SkipFallback bool
Domains []string
ExpectIPs StringList
}
func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
@ -26,16 +27,18 @@ func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
}
var advanced struct {
Address *Address `json:"address"`
ClientIP *Address `json:"clientIp"`
Port uint16 `json:"port"`
Domains []string `json:"domains"`
ExpectIPs StringList `json:"expectIps"`
Address *Address `json:"address"`
ClientIP *Address `json:"clientIp"`
Port uint16 `json:"port"`
SkipFallback bool `json:"skipFallback"`
Domains []string `json:"domains"`
ExpectIPs StringList `json:"expectIps"`
}
if err := json.Unmarshal(data, &advanced); err == nil {
c.Address = advanced.Address
c.ClientIP = advanced.ClientIP
c.Port = advanced.Port
c.SkipFallback = advanced.SkipFallback
c.Domains = advanced.Domains
c.ExpectIPs = advanced.ExpectIPs
return nil
@ -104,6 +107,7 @@ func (c *NameServerConfig) Build() (*dns.NameServer, error) {
Port: uint32(c.Port),
},
ClientIp: myClientIP,
SkipFallback: c.SkipFallback,
PrioritizedDomain: domains,
Geoip: geoipList,
OriginalRules: originalRules,
@ -119,13 +123,14 @@ var typeMap = map[router.Domain_Type]dns.DomainMatchingType{
// DNSConfig is a JSON serializable object for dns.Config.
type DNSConfig struct {
Servers []*NameServerConfig `json:"servers"`
Hosts map[string]*Address `json:"hosts"`
ClientIP *Address `json:"clientIp"`
Tag string `json:"tag"`
QueryStrategy string `json:"queryStrategy"`
CacheStrategy string `json:"cacheStrategy"`
DisableCache bool `json:"disableCache"`
Servers []*NameServerConfig `json:"servers"`
Hosts map[string]*Address `json:"hosts"`
ClientIP *Address `json:"clientIp"`
Tag string `json:"tag"`
QueryStrategy string `json:"queryStrategy"`
CacheStrategy string `json:"cacheStrategy"`
DisableCache bool `json:"disableCache"`
DisableFallback bool `json:"disableFallback"`
}
func getHostMapping(addr *Address) *dns.Config_HostMapping {
@ -143,8 +148,9 @@ func getHostMapping(addr *Address) *dns.Config_HostMapping {
// Build implements Buildable
func (c *DNSConfig) Build() (*dns.Config, error) {
config := &dns.Config{
Tag: c.Tag,
CacheStrategy: dns.CacheStrategy_Cache_ALL,
Tag: c.Tag,
CacheStrategy: dns.CacheStrategy_Cache_ALL,
DisableFallback: c.DisableFallback,
}
if c.DisableCache {

View file

@ -69,6 +69,7 @@ func TestDNSConfigParsing(t *testing.T) {
"address": "8.8.8.8",
"clientIp": "10.0.0.1",
"port": 5353,
"skipFallback": true,
"domains": ["domain:example.com"]
}],
"hosts": {
@ -80,7 +81,8 @@ func TestDNSConfigParsing(t *testing.T) {
},
"clientIp": "10.0.0.1",
"queryStrategy": "UseIPv4",
"disableCache": true
"disableCache": true,
"disableFallback": true
}`,
Parser: parserCreator(),
Output: &dns.Config{
@ -95,7 +97,8 @@ func TestDNSConfigParsing(t *testing.T) {
Network: net.Network_UDP,
Port: 5353,
},
ClientIp: []byte{10, 0, 0, 1},
ClientIp: []byte{10, 0, 0, 1},
SkipFallback: true,
PrioritizedDomain: []*dns.NameServer_PriorityDomain{
{
Type: dns.DomainMatchingType_Subdomain,
@ -137,9 +140,10 @@ func TestDNSConfigParsing(t *testing.T) {
Ip: [][]byte{{8, 8, 4, 4}},
},
},
ClientIp: []byte{10, 0, 0, 1},
QueryStrategy: dns.QueryStrategy_USE_IP4,
CacheStrategy: dns.CacheStrategy_Cache_DISABLE,
ClientIp: []byte{10, 0, 0, 1},
QueryStrategy: dns.QueryStrategy_USE_IP4,
CacheStrategy: dns.CacheStrategy_Cache_DISABLE,
DisableFallback: true,
},
},
})