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Refactor: MainResolver

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This commit is contained in:
yaling888 2022-03-28 00:44:13 +08:00
parent 9bab2c504e
commit 4502776513
8 changed files with 128 additions and 75 deletions
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2
adapter/outbound/direct.go
View file

@ -14,6 +14,7 @@ type Direct struct {
// DialContext implements C.ProxyAdapter
func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
opts = append(opts, dialer.WithDirect())
c, err := dialer.DialContext(ctx, "tcp", metadata.RemoteAddress(), d.Base.DialOptions(opts...)...)
if err != nil {
return nil, err
@ -24,6 +25,7 @@ func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...
// ListenPacketContext implements C.ProxyAdapter
func (d *Direct) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
opts = append(opts, dialer.WithDirect())
pc, err := dialer.ListenPacket(ctx, "udp", "", d.Base.DialOptions(opts...)...)
if err != nil {
return nil, err

2
adapter/outbound/util.go
View file

@ -44,7 +44,7 @@ func resolveUDPAddr(network, address string) (*net.UDPAddr, error) {
return nil, err
}
ip, err := resolver.ResolveIP(host)
ip, err := resolver.ResolveProxyServerHost(host)
if err != nil {
return nil, err
}

22
component/dialer/dialer.go
View file

@ -32,14 +32,14 @@ func DialContext(ctx context.Context, network, address string, options ...Option
var ip net.IP
switch network {
case "tcp4", "udp4":
if opt.interfaceName != "" {
ip, err = resolver.ResolveIPv4WithMain(host)
if !opt.direct {
ip, err = resolver.ResolveIPv4ProxyServerHost(host)
} else {
ip, err = resolver.ResolveIPv4(host)
}
default:
if opt.interfaceName != "" {
ip, err = resolver.ResolveIPv6WithMain(host)
if !opt.direct {
ip, err = resolver.ResolveIPv6ProxyServerHost(host)
} else {
ip, err = resolver.ResolveIPv6(host)
}
@ -121,7 +121,7 @@ func dualStackDialContext(ctx context.Context, network, address string, opt *opt
results := make(chan dialResult)
var primary, fallback dialResult
startRacer := func(ctx context.Context, network, host string, ipv6 bool) {
startRacer := func(ctx context.Context, network, host string, direct bool, ipv6 bool) {
result := dialResult{ipv6: ipv6, done: true}
defer func() {
select {
@ -135,14 +135,14 @@ func dualStackDialContext(ctx context.Context, network, address string, opt *opt
var ip net.IP
if ipv6 {
if opt.interfaceName != "" {
ip, result.error = resolver.ResolveIPv6WithMain(host)
if !direct {
ip, result.error = resolver.ResolveIPv6ProxyServerHost(host)
} else {
ip, result.error = resolver.ResolveIPv6(host)
}
} else {
if opt.interfaceName != "" {
ip, result.error = resolver.ResolveIPv4WithMain(host)
if !direct {
ip, result.error = resolver.ResolveIPv4ProxyServerHost(host)
} else {
ip, result.error = resolver.ResolveIPv4(host)
}
@ -155,8 +155,8 @@ func dualStackDialContext(ctx context.Context, network, address string, opt *opt
result.Conn, result.error = dialContext(ctx, network, ip, port, opt)
}
go startRacer(ctx, network+"4", host, false)
go startRacer(ctx, network+"6", host, true)
go startRacer(ctx, network+"4", host, opt.direct, false)
go startRacer(ctx, network+"6", host, opt.direct, true)
for res := range results {
if res.error == nil {

7
component/dialer/options.go
View file

@ -12,6 +12,7 @@ type option struct {
interfaceName string
addrReuse bool
routingMark int
direct bool
}
type Option func(opt *option)
@ -33,3 +34,9 @@ func WithRoutingMark(mark int) Option {
opt.routingMark = mark
}
}
func WithDirect() Option {
return func(opt *option) {
opt.direct = true
}
}

89
component/resolver/resolver.go
View file

@ -15,8 +15,8 @@ var (
// DefaultResolver aim to resolve ip
DefaultResolver Resolver
// MainResolver resolve ip with main domain server
MainResolver Resolver
// ProxyServerHostResolver resolve ip to proxies server host
ProxyServerHostResolver Resolver
// DisableIPv6 means don't resolve ipv6 host
// default value is true
@ -46,10 +46,6 @@ func ResolveIPv4(host string) (net.IP, error) {
return ResolveIPv4WithResolver(host, DefaultResolver)
}
func ResolveIPv4WithMain(host string) (net.IP, error) {
return ResolveIPv4WithResolver(host, MainResolver)
}
func ResolveIPv4WithResolver(host string, r Resolver) (net.IP, error) {
if node := DefaultHosts.Search(host); node != nil {
if ip := node.Data.(net.IP).To4(); ip != nil {
@ -69,16 +65,20 @@ func ResolveIPv4WithResolver(host string, r Resolver) (net.IP, error) {
return r.ResolveIPv4(host)
}
ctx, cancel := context.WithTimeout(context.Background(), DefaultDNSTimeout)
defer cancel()
ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip4", host)
if err != nil {
return nil, err
} else if len(ipAddrs) == 0 {
return nil, ErrIPNotFound
if DefaultResolver == nil {
ctx, cancel := context.WithTimeout(context.Background(), DefaultDNSTimeout)
defer cancel()
ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip4", host)
if err != nil {
return nil, err
} else if len(ipAddrs) == 0 {
return nil, ErrIPNotFound
}
return ipAddrs[rand.Intn(len(ipAddrs))], nil
}
return ipAddrs[rand.Intn(len(ipAddrs))], nil
return nil, ErrIPNotFound
}
// ResolveIPv6 with a host, return ipv6
@ -86,10 +86,6 @@ func ResolveIPv6(host string) (net.IP, error) {
return ResolveIPv6WithResolver(host, DefaultResolver)
}
func ResolveIPv6WithMain(host string) (net.IP, error) {
return ResolveIPv6WithResolver(host, MainResolver)
}
func ResolveIPv6WithResolver(host string, r Resolver) (net.IP, error) {
if DisableIPv6 {
return nil, ErrIPv6Disabled
@ -113,16 +109,20 @@ func ResolveIPv6WithResolver(host string, r Resolver) (net.IP, error) {
return r.ResolveIPv6(host)
}
ctx, cancel := context.WithTimeout(context.Background(), DefaultDNSTimeout)
defer cancel()
ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip6", host)
if err != nil {
return nil, err
} else if len(ipAddrs) == 0 {
return nil, ErrIPNotFound
if DefaultResolver == nil {
ctx, cancel := context.WithTimeout(context.Background(), DefaultDNSTimeout)
defer cancel()
ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip6", host)
if err != nil {
return nil, err
} else if len(ipAddrs) == 0 {
return nil, ErrIPNotFound
}
return ipAddrs[rand.Intn(len(ipAddrs))], nil
}
return ipAddrs[rand.Intn(len(ipAddrs))], nil
return nil, ErrIPNotFound
}
// ResolveIPWithResolver same as ResolveIP, but with a resolver
@ -145,12 +145,16 @@ func ResolveIPWithResolver(host string, r Resolver) (net.IP, error) {
return ip, nil
}
ipAddr, err := net.ResolveIPAddr("ip", host)
if err != nil {
return nil, err
if DefaultResolver == nil {
ipAddr, err := net.ResolveIPAddr("ip", host)
if err != nil {
return nil, err
}
return ipAddr.IP, nil
}
return ipAddr.IP, nil
return nil, ErrIPNotFound
}
// ResolveIP with a host, return ip
@ -158,7 +162,26 @@ func ResolveIP(host string) (net.IP, error) {
return ResolveIPWithResolver(host, DefaultResolver)
}
// ResolveIPWithMainResolver with a host, use main resolver, return ip
func ResolveIPWithMainResolver(host string) (net.IP, error) {
return ResolveIPWithResolver(host, MainResolver)
// ResolveIPv4ProxyServerHost proxies server host only
func ResolveIPv4ProxyServerHost(host string) (net.IP, error) {
if ProxyServerHostResolver != nil {
return ResolveIPv4WithResolver(host, ProxyServerHostResolver)
}
return ResolveIPv4(host)
}
// ResolveIPv6ProxyServerHost proxies server host only
func ResolveIPv6ProxyServerHost(host string) (net.IP, error) {
if ProxyServerHostResolver != nil {
return ResolveIPv6WithResolver(host, ProxyServerHostResolver)
}
return ResolveIPv6(host)
}
// ResolveProxyServerHost proxies server host only
func ResolveProxyServerHost(host string) (net.IP, error) {
if ProxyServerHostResolver != nil {
return ResolveIPWithResolver(host, ProxyServerHostResolver)
}
return ResolveIP(host)
}

52
config/config.go
View file

@ -63,17 +63,18 @@ type Controller struct {
// DNS config
type DNS struct {
Enable bool `yaml:"enable"`
IPv6 bool `yaml:"ipv6"`
NameServer []dns.NameServer `yaml:"nameserver"`
Fallback []dns.NameServer `yaml:"fallback"`
FallbackFilter FallbackFilter `yaml:"fallback-filter"`
Listen string `yaml:"listen"`
EnhancedMode C.DNSMode `yaml:"enhanced-mode"`
DefaultNameserver []dns.NameServer `yaml:"default-nameserver"`
FakeIPRange *fakeip.Pool
Hosts *trie.DomainTrie
NameServerPolicy map[string]dns.NameServer
Enable bool `yaml:"enable"`
IPv6 bool `yaml:"ipv6"`
NameServer []dns.NameServer `yaml:"nameserver"`
Fallback []dns.NameServer `yaml:"fallback"`
FallbackFilter FallbackFilter `yaml:"fallback-filter"`
Listen string `yaml:"listen"`
EnhancedMode C.DNSMode `yaml:"enhanced-mode"`
DefaultNameserver []dns.NameServer `yaml:"default-nameserver"`
FakeIPRange *fakeip.Pool
Hosts *trie.DomainTrie
NameServerPolicy map[string]dns.NameServer
ProxyServerNameserver []dns.NameServer
}
// FallbackFilter config
@ -125,18 +126,19 @@ type Config struct {
}
type RawDNS struct {
Enable bool `yaml:"enable"`
IPv6 bool `yaml:"ipv6"`
UseHosts bool `yaml:"use-hosts"`
NameServer []string `yaml:"nameserver"`
Fallback []string `yaml:"fallback"`
FallbackFilter RawFallbackFilter `yaml:"fallback-filter"`
Listen string `yaml:"listen"`
EnhancedMode C.DNSMode `yaml:"enhanced-mode"`
FakeIPRange string `yaml:"fake-ip-range"`
FakeIPFilter []string `yaml:"fake-ip-filter"`
DefaultNameserver []string `yaml:"default-nameserver"`
NameServerPolicy map[string]string `yaml:"nameserver-policy"`
Enable bool `yaml:"enable"`
IPv6 bool `yaml:"ipv6"`
UseHosts bool `yaml:"use-hosts"`
NameServer []string `yaml:"nameserver"`
Fallback []string `yaml:"fallback"`
FallbackFilter RawFallbackFilter `yaml:"fallback-filter"`
Listen string `yaml:"listen"`
EnhancedMode C.DNSMode `yaml:"enhanced-mode"`
FakeIPRange string `yaml:"fake-ip-range"`
FakeIPFilter []string `yaml:"fake-ip-filter"`
DefaultNameserver []string `yaml:"default-nameserver"`
NameServerPolicy map[string]string `yaml:"nameserver-policy"`
ProxyServerNameserver []string `yaml:"proxy-server-nameserver"`
}
type RawFallbackFilter struct {
@ -679,6 +681,10 @@ func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS,
return nil, err
}
if dnsCfg.ProxyServerNameserver, err = parseNameServer(cfg.ProxyServerNameserver); err != nil {
return nil, err
}
if len(cfg.DefaultNameserver) == 0 {
return nil, errors.New("default nameserver should have at least one nameserver")
}

15
dns/resolver.go
View file

@ -41,6 +41,7 @@ type Resolver struct {
group singleflight.Group
lruCache *cache.LruCache
policy *trie.DomainTrie
proxyServer []dnsClient
}
// ResolveIP request with TypeA and TypeAAAA, priority return TypeA
@ -301,6 +302,11 @@ func (r *Resolver) asyncExchange(ctx context.Context, client []dnsClient, msg *D
return ch
}
// HasProxyServer has proxy server dns client
func (r *Resolver) HasProxyServer() bool {
return len(r.main) > 0
}
type NameServer struct {
Net string
Addr string
@ -319,6 +325,7 @@ type FallbackFilter struct {
type Config struct {
Main, Fallback []NameServer
Default []NameServer
ProxyServer []NameServer
IPv6 bool
EnhancedMode C.DNSMode
FallbackFilter FallbackFilter
@ -344,6 +351,10 @@ func NewResolver(config Config) *Resolver {
r.fallback = transform(config.Fallback, defaultResolver)
}
if len(config.ProxyServer) != 0 {
r.proxyServer = transform(config.ProxyServer, defaultResolver)
}
if len(config.Policy) != 0 {
r.policy = trie.New()
for domain, nameserver := range config.Policy {
@ -377,10 +388,10 @@ func NewResolver(config Config) *Resolver {
return r
}
func NewMainResolver(old *Resolver) *Resolver {
func NewProxyServerHostResolver(old *Resolver) *Resolver {
r := &Resolver{
ipv6: old.ipv6,
main: old.main,
main: old.proxyServer,
lruCache: old.lruCache,
hosts: old.hosts,
policy: old.policy,

14
hub/executor/executor.go
View file

@ -130,12 +130,13 @@ func updateDNS(c *config.DNS, t *config.Tun) {
Domain: c.FallbackFilter.Domain,
GeoSite: c.FallbackFilter.GeoSite,
},
Default: c.DefaultNameserver,
Policy: c.NameServerPolicy,
Default: c.DefaultNameserver,
Policy: c.NameServerPolicy,
ProxyServer: c.ProxyServerNameserver,
}
r := dns.NewResolver(cfg)
mr := dns.NewMainResolver(r)
pr := dns.NewProxyServerHostResolver(r)
m := dns.NewEnhancer(cfg)
// reuse cache of old host mapper
@ -144,9 +145,12 @@ func updateDNS(c *config.DNS, t *config.Tun) {
}
resolver.DefaultResolver = r
resolver.MainResolver = mr
resolver.DefaultHostMapper = m
if pr.HasProxyServer() {
resolver.ProxyServerHostResolver = pr
}
if t.Enable {
resolver.DefaultLocalServer = dns.NewLocalServer(r, m)
}
@ -156,9 +160,9 @@ func updateDNS(c *config.DNS, t *config.Tun) {
} else {
if !t.Enable {
resolver.DefaultResolver = nil
resolver.MainResolver = nil
resolver.DefaultHostMapper = nil
resolver.DefaultLocalServer = nil
resolver.ProxyServerHostResolver = nil
}
dns.ReCreateServer("", nil, nil)
}