Fix: crash when dns not set

* Fix: add chunkSize limit in TLSObfs

* Chore: add length var for len(b)

README.md

@@ -5,7 +5,7 @@
   <br>
 </h1>
 
-<h4 align="center">A rule based proxy in Go.</h4>
+<h4 align="center">A rule based tunnel in Go.</h4>
 
 <p align="center">
   <a href="https://travis-ci.org/Dreamacro/clash">
@@ -22,16 +22,12 @@
 
 ## Features
 
-- HTTP/HTTPS and SOCKS proxy
+- HTTP/HTTPS and SOCKS protocol
 - Surge like configuration
 - GeoIP rule support
 - Support Vmess/Shadowsocks/Socks5
 - Support for Netfilter TCP redirect
 
-## Discussion
-
-[Telegram Group](https://t.me/clash_discuss)
-
 ## Install
 
 You can build from source:
@@ -42,7 +38,7 @@ go get -u -v github.com/Dreamacro/clash
 
 Pre-built binaries are available: [release](https://github.com/Dreamacro/clash/releases)
 
-Requires Go >= 1.10.
+Requires Go >= 1.11.
 
 ## Daemon
 
@@ -85,7 +81,7 @@ port: 7890
 # port of SOCKS5
 socks-port: 7891
 
-# redir proxy for Linux and macOS
+# redir port for Linux and macOS
 # redir-port: 7892
 
 allow-lan: false
@@ -94,7 +90,7 @@ allow-lan: false
 mode: Rule
 
 # set log level to stdout (default is info)
-# info / warning / error / debug
+# info / warning / error / debug / silent
 log-level: info
 
 # A RESTful API for clash
@@ -103,6 +99,17 @@ external-controller: 127.0.0.1:9090
 # Secret for RESTful API (Optional)
 # secret: ""
 
+dns:
+  # enable: true # set true to enable dns (default is false)
+  # ipv6: false # default is false
+  # listen: 0.0.0.0:53
+  # enhanced-mode: redir-host
+  # nameserver:
+  #   - 114.114.114.114
+  #   - tls://dns.rubyfish.cn:853 # dns over tls
+  # fallback: # concurrent request with nameserver, fallback used when GEOIP country isn't CN
+  #   - 8.8.8.8
+
 Proxy:
 
 # shadowsocks
@@ -126,11 +133,22 @@ Proxy:
 
 # socks5
 - { name: "socks", type: socks5, server: server, port: 443 }
+# socks5 with authentication
+- { name: "socks", type: socks5, server: server, port: 443, username: "username", password: "password" }
 # with tls
 - { name: "socks", type: socks5, server: server, port: 443, tls: true }
 # with tls and skip-cert-verify
 - { name: "socks", type: socks5, server: server, port: 443, tls: true, skip-cert-verify: true }
 
+# http
+- { name: "http", type: http, server: server, port: 443 }
+# http with authentication
+- { name: "http", type: http, server: server, port: 443, username: "username", password: "password" }
+# with tls (https)
+- { name: "http", type: http, server: server, port: 443, tls: true }
+# with tls (https) and skip-cert-verify
+- { name: "http", type: http, server: server, port: 443, tls: true, skip-cert-verify: true }
+
 Proxy Group:
 # url-test select which proxy will be used by benchmarking speed to a URL.
 - { name: "auto", type: url-test, proxies: ["ss1", "ss2", "vmess1"], url: http://www.gstatic.com/generate_204, interval: 300 }
@@ -149,8 +167,9 @@ Rule:
 - DOMAIN-SUFFIX,ad.com,REJECT
 - IP-CIDR,127.0.0.0/8,DIRECT
 - GEOIP,CN,DIRECT
-# note: there is two ","
+# FINAL would remove after prerelease
-- FINAL,,Proxy
+# you also can use `FINAL,Proxy` or `FINAL,,Proxy` now
+- MATCH,Proxy
 ```
 
 ## Thanks

adapters/inbound/socket.go

@@ -29,9 +29,12 @@ func (s *SocketAdapter) Conn() net.Conn {
 }
 
 // NewSocket is SocketAdapter generator
-func NewSocket(target socks.Addr, conn net.Conn) *SocketAdapter {
+func NewSocket(target socks.Addr, conn net.Conn, source C.SourceType) *SocketAdapter {
+	metadata := parseSocksAddr(target)
+	metadata.Source = source
+
 	return &SocketAdapter{
 		conn:     conn,
-		metadata: parseSocksAddr(target),
+		metadata: metadata,
 	}
 }

adapters/inbound/util.go

@@ -10,32 +10,26 @@ import (
 )
 
 func parseSocksAddr(target socks.Addr) *C.Metadata {
-	var host, port string
+	metadata := &C.Metadata{
-	var ip net.IP
+		NetWork:  C.TCP,
+		AddrType: int(target[0]),
+	}
 
 	switch target[0] {
 	case socks.AtypDomainName:
-		host = string(target[2 : 2+target[1]])
+		metadata.Host = string(target[2 : 2+target[1]])
-		port = strconv.Itoa((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
+		metadata.Port = strconv.Itoa((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
-		ipAddr, err := net.ResolveIPAddr("ip", host)
-		if err == nil {
-			ip = ipAddr.IP
-		}
 	case socks.AtypIPv4:
-		ip = net.IP(target[1 : 1+net.IPv4len])
+		ip := net.IP(target[1 : 1+net.IPv4len])
-		port = strconv.Itoa((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
+		metadata.IP = &ip
+		metadata.Port = strconv.Itoa((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
 	case socks.AtypIPv6:
-		ip = net.IP(target[1 : 1+net.IPv6len])
+		ip := net.IP(target[1 : 1+net.IPv6len])
-		port = strconv.Itoa((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
+		metadata.IP = &ip
+		metadata.Port = strconv.Itoa((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
 	}
 
-	return &C.Metadata{
+	return metadata
-		NetWork:  C.TCP,
-		AddrType: int(target[0]),
-		Host:     host,
-		IP:       &ip,
-		Port:     port,
-	}
 }
 
 func parseHTTPAddr(request *http.Request) *C.Metadata {
@@ -44,28 +38,26 @@ func parseHTTPAddr(request *http.Request) *C.Metadata {
 	if port == "" {
 		port = "80"
 	}
-	ipAddr, err := net.ResolveIPAddr("ip", host)
-	var resolveIP *net.IP
-	if err == nil {
-		resolveIP = &ipAddr.IP
-	}
 
-	var addType int
+	metadata := &C.Metadata{
-	ip := net.ParseIP(host)
-	switch {
-	case ip == nil:
-		addType = socks.AtypDomainName
-	case ip.To4() == nil:
-		addType = socks.AtypIPv6
-	default:
-		addType = socks.AtypIPv4
-	}
-
-	return &C.Metadata{
 		NetWork:  C.TCP,
-		AddrType: addType,
+		Source:   C.HTTP,
+		AddrType: C.AtypDomainName,
 		Host:     host,
-		IP:       resolveIP,
+		IP:       nil,
 		Port:     port,
 	}
+
+	ip := net.ParseIP(host)
+	if ip != nil {
+		switch {
+		case ip.To4() == nil:
+			metadata.AddrType = C.AtypIPv6
+		default:
+			metadata.AddrType = C.AtypIPv4
+		}
+		metadata.IP = &ip
+	}
+
+	return metadata
 }

adapters/outbound/direct.go

@@ -1,6 +1,7 @@
 package adapters
 
 import (
+	"encoding/json"
 	"net"
 
 	C "github.com/Dreamacro/clash/constant"
@@ -32,7 +33,12 @@ func (d *Direct) Type() C.AdapterType {
 }
 
 func (d *Direct) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err error) {
-	c, err := net.DialTimeout("tcp", net.JoinHostPort(metadata.String(), metadata.Port), tcpTimeout)
+	address := net.JoinHostPort(metadata.Host, metadata.Port)
+	if metadata.IP != nil {
+		address = net.JoinHostPort(metadata.IP.String(), metadata.Port)
+	}
+
+	c, err := net.DialTimeout("tcp", address, tcpTimeout)
 	if err != nil {
 		return
 	}
@@ -40,6 +46,12 @@ func (d *Direct) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err er
 	return &DirectAdapter{conn: c}, nil
 }
 
+func (d *Direct) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]string{
+		"type": d.Type().String(),
+	})
+}
+
 func NewDirect() *Direct {
 	return &Direct{}
 }

adapters/outbound/fallback.go

@@ -1,6 +1,7 @@
 package adapters
 
 import (
+	"encoding/json"
 	"errors"
 	"sync"
 	"time"
@@ -63,6 +64,18 @@ func (f *Fallback) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err
 	return f.proxies[0].RawProxy.Generator(metadata)
 }
 
+func (f *Fallback) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range f.proxies {
+		all = append(all, proxy.RawProxy.Name())
+	}
+	return json.Marshal(map[string]interface{}{
+		"type": f.Type().String(),
+		"now":  f.Now(),
+		"all":  all,
+	})
+}
+
 func (f *Fallback) Close() {
 	f.done <- struct{}{}
 }

adapters/outbound/http.go

@@ -0,0 +1,148 @@
+package adapters
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"strconv"
+
+	C "github.com/Dreamacro/clash/constant"
+)
+
+// HTTPAdapter is a proxy adapter
+type HTTPAdapter struct {
+	conn net.Conn
+}
+
+// Close is used to close connection
+func (ha *HTTPAdapter) Close() {
+	ha.conn.Close()
+}
+
+func (ha *HTTPAdapter) Conn() net.Conn {
+	return ha.conn
+}
+
+type Http struct {
+	addr           string
+	name           string
+	user           string
+	pass           string
+	tls            bool
+	skipCertVerify bool
+	tlsConfig      *tls.Config
+}
+
+type HttpOption struct {
+	Name           string `proxy:"name"`
+	Server         string `proxy:"server"`
+	Port           int    `proxy:"port"`
+	UserName       string `proxy:"username,omitempty"`
+	Password       string `proxy:"password,omitempty"`
+	TLS            bool   `proxy:"tls,omitempty"`
+	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
+}
+
+func (h *Http) Name() string {
+	return h.name
+}
+
+func (h *Http) Type() C.AdapterType {
+	return C.Http
+}
+
+func (h *Http) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err error) {
+	c, err := net.DialTimeout("tcp", h.addr, tcpTimeout)
+	if err == nil && h.tls {
+		cc := tls.Client(c, h.tlsConfig)
+		err = cc.Handshake()
+		c = cc
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error", h.addr)
+	}
+	tcpKeepAlive(c)
+	if err := h.shakeHand(metadata, c); err != nil {
+		return nil, err
+	}
+
+	return &HTTPAdapter{conn: c}, nil
+}
+
+func (h *Http) shakeHand(metadata *C.Metadata, rw io.ReadWriter) error {
+	var buf bytes.Buffer
+	var err error
+
+	buf.WriteString("CONNECT ")
+	buf.WriteString(net.JoinHostPort(metadata.Host, metadata.Port))
+	buf.WriteString(" HTTP/1.1\r\n")
+	buf.WriteString("Proxy-Connection: Keep-Alive\r\n")
+
+	if h.user != "" && h.pass != "" {
+		auth := h.user + ":" + h.pass
+		buf.WriteString("Proxy-Authorization: Basic " + base64.StdEncoding.EncodeToString([]byte(auth)) + "\r\n")
+	}
+	// header ended
+	buf.WriteString("\r\n")
+
+	_, err = rw.Write(buf.Bytes())
+	if err != nil {
+		return err
+	}
+
+	var req http.Request
+	resp, err := http.ReadResponse(bufio.NewReader(rw), &req)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode == 200 {
+		return nil
+	}
+
+	if resp.StatusCode == 407 {
+		return errors.New("HTTP need auth")
+	}
+
+	if resp.StatusCode == 405 {
+		return errors.New("CONNECT method not allowed by proxy")
+	}
+	return fmt.Errorf("can not connect remote err code: %d", resp.StatusCode)
+}
+
+func (h *Http) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]string{
+		"type": h.Type().String(),
+	})
+}
+
+func NewHttp(option HttpOption) *Http {
+	var tlsConfig *tls.Config
+	if option.TLS {
+		tlsConfig = &tls.Config{
+			InsecureSkipVerify: option.SkipCertVerify,
+			ClientSessionCache: getClientSessionCache(),
+			MinVersion:         tls.VersionTLS11,
+			MaxVersion:         tls.VersionTLS12,
+			ServerName:         option.Server,
+		}
+	}
+
+	return &Http{
+		addr:           net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+		name:           option.Name,
+		user:           option.UserName,
+		pass:           option.Password,
+		tls:            option.TLS,
+		skipCertVerify: option.SkipCertVerify,
+		tlsConfig:      tlsConfig,
+	}
+}

adapters/outbound/reject.go

@@ -1,6 +1,7 @@
 package adapters
 
 import (
+	"encoding/json"
 	"io"
 	"net"
 	"time"
@@ -36,6 +37,12 @@ func (r *Reject) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err er
 	return &RejectAdapter{conn: &NopConn{}}, nil
 }
 
+func (r *Reject) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]string{
+		"type": r.Type().String(),
+	})
+}
+
 func NewReject() *Reject {
 	return &Reject{}
 }
@@ -43,7 +50,7 @@ func NewReject() *Reject {
 type NopConn struct{}
 
 func (rw *NopConn) Read(b []byte) (int, error) {
-	return len(b), nil
+	return 0, io.EOF
 }
 
 func (rw *NopConn) Write(b []byte) (int, error) {

adapters/outbound/selector.go

@@ -1,6 +1,7 @@
 package adapters
 
 import (
+	"encoding/json"
 	"errors"
 	"sort"
 
@@ -30,17 +31,21 @@ func (s *Selector) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err
 	return s.selected.Generator(metadata)
 }
 
-func (s *Selector) Now() string {
+func (s *Selector) MarshalJSON() ([]byte, error) {
-	return s.selected.Name()
-}
-
-func (s *Selector) All() []string {
 	var all []string
 	for k := range s.proxies {
 		all = append(all, k)
 	}
 	sort.Strings(all)
-	return all
+	return json.Marshal(map[string]interface{}{
+		"type": s.Type().String(),
+		"now":  s.Now(),
+		"all":  all,
+	})
+}
+
+func (s *Selector) Now() string {
+	return s.selected.Name()
 }
 
 func (s *Selector) Set(name string) error {

adapters/outbound/shadowsocks.go

@@ -2,6 +2,7 @@ package adapters
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"net"
 	"strconv"
@@ -71,8 +72,14 @@ func (ss *ShadowSocks) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter,
 	return &ShadowsocksAdapter{conn: c}, err
 }
 
+func (ss *ShadowSocks) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]string{
+		"type": ss.Type().String(),
+	})
+}
+
 func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
-	server := fmt.Sprintf("%s:%d", option.Server, option.Port)
+	server := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
 	cipher := option.Cipher
 	password := option.Password
 	ciph, err := core.PickCipher(cipher, nil, password)

adapters/outbound/socks5.go

@@ -3,10 +3,12 @@ package adapters
 import (
 	"bytes"
 	"crypto/tls"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
 	"net"
+	"strconv"
 
 	C "github.com/Dreamacro/clash/constant"
 
@@ -30,14 +32,19 @@ func (ss *Socks5Adapter) Conn() net.Conn {
 type Socks5 struct {
 	addr           string
 	name           string
+	user           string
+	pass           string
 	tls            bool
 	skipCertVerify bool
+	tlsConfig      *tls.Config
 }
 
 type Socks5Option struct {
 	Name           string `proxy:"name"`
 	Server         string `proxy:"server"`
 	Port           int    `proxy:"port"`
+	UserName       string `proxy:"username,omitempty"`
+	Password       string `proxy:"password,omitempty"`
 	TLS            bool   `proxy:"tls,omitempty"`
 	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
 }
@@ -54,11 +61,9 @@ func (ss *Socks5) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err e
 	c, err := net.DialTimeout("tcp", ss.addr, tcpTimeout)
 
 	if err == nil && ss.tls {
-		tlsConfig := tls.Config{
+		cc := tls.Client(c, ss.tlsConfig)
-			InsecureSkipVerify: ss.skipCertVerify,
+		err = cc.Handshake()
-			MaxVersion:         tls.VersionTLS12,
+		c = cc
-		}
-		c = tls.Client(c, &tlsConfig)
 	}
 
 	if err != nil {
@@ -71,21 +76,55 @@ func (ss *Socks5) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err e
 	return &Socks5Adapter{conn: c}, nil
 }
 
+func (ss *Socks5) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]string{
+		"type": ss.Type().String(),
+	})
+}
+
 func (ss *Socks5) shakeHand(metadata *C.Metadata, rw io.ReadWriter) error {
 	buf := make([]byte, socks.MaxAddrLen)
+	var err error
 
-	// VER, CMD, RSV
+	// VER, NMETHODS, METHODS
-	_, err := rw.Write([]byte{5, 1, 0})
+	if len(ss.user) > 0 {
+		_, err = rw.Write([]byte{5, 1, 2})
+	} else {
+		_, err = rw.Write([]byte{5, 1, 0})
+	}
 	if err != nil {
 		return err
 	}
 
+	// VER, METHOD
 	if _, err := io.ReadFull(rw, buf[:2]); err != nil {
 		return err
 	}
 
 	if buf[0] != 5 {
 		return errors.New("SOCKS version error")
+	}
+
+	if buf[1] == 2 {
+		// password protocol version
+		authMsg := &bytes.Buffer{}
+		authMsg.WriteByte(1)
+		authMsg.WriteByte(uint8(len(ss.user)))
+		authMsg.WriteString(ss.user)
+		authMsg.WriteByte(uint8(len(ss.pass)))
+		authMsg.WriteString(ss.pass)
+
+		if _, err := rw.Write(authMsg.Bytes()); err != nil {
+			return err
+		}
+
+		if _, err := io.ReadFull(rw, buf[:2]); err != nil {
+			return err
+		}
+
+		if buf[1] != 0 {
+			return errors.New("rejected username/password")
+		}
 	} else if buf[1] != 0 {
 		return errors.New("SOCKS need auth")
 	}
@@ -103,10 +142,24 @@ func (ss *Socks5) shakeHand(metadata *C.Metadata, rw io.ReadWriter) error {
 }
 
 func NewSocks5(option Socks5Option) *Socks5 {
+	var tlsConfig *tls.Config
+	if option.TLS {
+		tlsConfig = &tls.Config{
+			InsecureSkipVerify: option.SkipCertVerify,
+			ClientSessionCache: getClientSessionCache(),
+			MinVersion:         tls.VersionTLS11,
+			MaxVersion:         tls.VersionTLS12,
+			ServerName:         option.Server,
+		}
+	}
+
 	return &Socks5{
-		addr:           fmt.Sprintf("%s:%d", option.Server, option.Port),
+		addr:           net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
 		name:           option.Name,
+		user:           option.UserName,
+		pass:           option.Password,
 		tls:            option.TLS,
 		skipCertVerify: option.SkipCertVerify,
+		tlsConfig:      tlsConfig,
 	}
 }

adapters/outbound/urltest.go

@@ -1,7 +1,9 @@
 package adapters
 
 import (
+	"encoding/json"
 	"errors"
+	"sort"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -46,6 +48,19 @@ func (u *URLTest) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err e
 	return a, err
 }
 
+func (u *URLTest) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range u.proxies {
+		all = append(all, proxy.Name())
+	}
+	sort.Strings(all)
+	return json.Marshal(map[string]interface{}{
+		"type": u.Type().String(),
+		"now":  u.Now(),
+		"all":  all,
+	})
+}
+
 func (u *URLTest) Close() {
 	u.done <- struct{}{}
 }

adapters/outbound/util.go

@@ -1,10 +1,12 @@
 package adapters
 
 import (
+	"crypto/tls"
 	"fmt"
 	"net"
 	"net/http"
 	"net/url"
+	"sync"
 	"time"
 
 	C "github.com/Dreamacro/clash/constant"
@@ -14,6 +16,11 @@ const (
 	tcpTimeout = 5 * time.Second
 )
 
+var (
+	globalClientSessionCache tls.ClientSessionCache
+	once                     sync.Once
+)
+
 // DelayTest get the delay for the specified URL
 func DelayTest(proxy C.Proxy, url string) (t int16, err error) {
 	addr, err := urlToMetadata(url)
@@ -95,3 +102,10 @@ func tcpKeepAlive(c net.Conn) {
 		tcp.SetKeepAlivePeriod(30 * time.Second)
 	}
 }
+
+func getClientSessionCache() tls.ClientSessionCache {
+	once.Do(func() {
+		globalClientSessionCache = tls.NewLRUClientSessionCache(128)
+	})
+	return globalClientSessionCache
+}

adapters/outbound/vmess.go

@@ -1,6 +1,7 @@
 package adapters
 
 import (
+	"encoding/json"
 	"fmt"
 	"net"
 	"strconv"
@@ -43,24 +44,30 @@ type VmessOption struct {
 	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
 }
 
-func (ss *Vmess) Name() string {
+func (v *Vmess) Name() string {
-	return ss.name
+	return v.name
 }
 
-func (ss *Vmess) Type() C.AdapterType {
+func (v *Vmess) Type() C.AdapterType {
 	return C.Vmess
 }
 
-func (ss *Vmess) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err error) {
+func (v *Vmess) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err error) {
-	c, err := net.DialTimeout("tcp", ss.server, tcpTimeout)
+	c, err := net.DialTimeout("tcp", v.server, tcpTimeout)
 	if err != nil {
-		return nil, fmt.Errorf("%s connect error", ss.server)
+		return nil, fmt.Errorf("%s connect error", v.server)
 	}
 	tcpKeepAlive(c)
-	c, err = ss.client.New(c, parseVmessAddr(metadata))
+	c, err = v.client.New(c, parseVmessAddr(metadata))
 	return &VmessAdapter{conn: c}, err
 }
 
+func (v *Vmess) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]interface{}{
+		"type": v.Type().String(),
+	})
+}
+
 func NewVmess(option VmessOption) (*Vmess, error) {
 	security := strings.ToLower(option.Cipher)
 	client, err := vmess.NewClient(vmess.Config{
@@ -68,10 +75,12 @@ func NewVmess(option VmessOption) (*Vmess, error) {
 		AlterID:        uint16(option.AlterID),
 		Security:       security,
 		TLS:            option.TLS,
-		Host:           fmt.Sprintf("%s:%d", option.Server, option.Port),
+		HostName:       option.Server,
+		Port:           strconv.Itoa(option.Port),
 		NetWork:        option.Network,
 		WebSocketPath:  option.WSPath,
 		SkipCertVerify: option.SkipCertVerify,
+		SessionCacahe:  getClientSessionCache(),
 	})
 	if err != nil {
 		return nil, err
@@ -79,7 +88,7 @@ func NewVmess(option VmessOption) (*Vmess, error) {
 
 	return &Vmess{
 		name:   option.Name,
-		server: fmt.Sprintf("%s:%d", option.Server, option.Port),
+		server: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
 		client: client,
 	}, nil
 }

common/cache/cache.go

@@ -0,0 +1,91 @@
+package cache
+
+import (
+	"runtime"
+	"sync"
+	"time"
+)
+
+// Cache store element with a expired time
+type Cache struct {
+	*cache
+}
+
+type cache struct {
+	mapping sync.Map
+	janitor *janitor
+}
+
+type element struct {
+	Expired time.Time
+	Payload interface{}
+}
+
+// Put element in Cache with its ttl
+func (c *cache) Put(key interface{}, payload interface{}, ttl time.Duration) {
+	c.mapping.Store(key, &element{
+		Payload: payload,
+		Expired: time.Now().Add(ttl),
+	})
+}
+
+// Get element in Cache, and drop when it expired
+func (c *cache) Get(key interface{}) interface{} {
+	item, exist := c.mapping.Load(key)
+	if !exist {
+		return nil
+	}
+	elm := item.(*element)
+	// expired
+	if time.Since(elm.Expired) > 0 {
+		c.mapping.Delete(key)
+		return nil
+	}
+	return elm.Payload
+}
+
+func (c *cache) cleanup() {
+	c.mapping.Range(func(k, v interface{}) bool {
+		key := k.(string)
+		elm := v.(*element)
+		if time.Since(elm.Expired) > 0 {
+			c.mapping.Delete(key)
+		}
+		return true
+	})
+}
+
+type janitor struct {
+	interval time.Duration
+	stop     chan struct{}
+}
+
+func (j *janitor) process(c *cache) {
+	ticker := time.NewTicker(j.interval)
+	for {
+		select {
+		case <-ticker.C:
+			c.cleanup()
+		case <-j.stop:
+			ticker.Stop()
+			return
+		}
+	}
+}
+
+func stopJanitor(c *Cache) {
+	c.janitor.stop <- struct{}{}
+}
+
+// New return *Cache
+func New(interval time.Duration) *Cache {
+	j := &janitor{
+		interval: interval,
+		stop:     make(chan struct{}),
+	}
+	c := &cache{janitor: j}
+	go j.process(c)
+	C := &Cache{c}
+	runtime.SetFinalizer(C, stopJanitor)
+	return C
+}

common/cache/cache_test.go

@@ -0,0 +1,70 @@
+package cache
+
+import (
+	"runtime"
+	"testing"
+	"time"
+)
+
+func TestCache_Basic(t *testing.T) {
+	interval := 200 * time.Millisecond
+	ttl := 20 * time.Millisecond
+	c := New(interval)
+	c.Put("int", 1, ttl)
+	c.Put("string", "a", ttl)
+
+	i := c.Get("int")
+	if i.(int) != 1 {
+		t.Error("should recv 1")
+	}
+
+	s := c.Get("string")
+	if s.(string) != "a" {
+		t.Error("should recv 'a'")
+	}
+}
+
+func TestCache_TTL(t *testing.T) {
+	interval := 200 * time.Millisecond
+	ttl := 20 * time.Millisecond
+	c := New(interval)
+	c.Put("int", 1, ttl)
+
+	i := c.Get("int")
+	if i.(int) != 1 {
+		t.Error("should recv 1")
+	}
+
+	time.Sleep(ttl * 2)
+	i = c.Get("int")
+	if i != nil {
+		t.Error("should recv nil")
+	}
+}
+
+func TestCache_AutoCleanup(t *testing.T) {
+	interval := 10 * time.Millisecond
+	ttl := 15 * time.Millisecond
+	c := New(interval)
+	c.Put("int", 1, ttl)
+
+	time.Sleep(ttl * 2)
+	i := c.Get("int")
+	if i != nil {
+		t.Error("should recv nil")
+	}
+}
+
+func TestCache_AutoGC(t *testing.T) {
+	sign := make(chan struct{})
+	go func() {
+		interval := 10 * time.Millisecond
+		ttl := 15 * time.Millisecond
+		c := New(interval)
+		c.Put("int", 1, ttl)
+		sign <- struct{}{}
+	}()
+
+	<-sign
+	runtime.GC()
+}

common/picker/picker.go

@@ -0,0 +1,22 @@
+package picker
+
+import "context"
+
+func SelectFast(ctx context.Context, in <-chan interface{}) <-chan interface{} {
+	out := make(chan interface{})
+	go func() {
+		select {
+		case p, open := <-in:
+			if open {
+				out <- p
+			}
+		case <-ctx.Done():
+		}
+
+		close(out)
+		for range in {
+		}
+	}()
+
+	return out
+}

common/picker/picker_test.go

@@ -0,0 +1,44 @@
+package picker
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func sleepAndSend(delay int, in chan<- interface{}, input interface{}) {
+	time.Sleep(time.Millisecond * time.Duration(delay))
+	in <- input
+}
+
+func sleepAndClose(delay int, in chan interface{}) {
+	time.Sleep(time.Millisecond * time.Duration(delay))
+	close(in)
+}
+
+func TestPicker_Basic(t *testing.T) {
+	in := make(chan interface{})
+	fast := SelectFast(context.Background(), in)
+	go sleepAndSend(20, in, 1)
+	go sleepAndSend(30, in, 2)
+	go sleepAndClose(40, in)
+
+	number, exist := <-fast
+	if !exist || number != 1 {
+		t.Error("should recv 1", exist, number)
+	}
+}
+
+func TestPicker_Timeout(t *testing.T) {
+	in := make(chan interface{})
+	ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*5)
+	defer cancel()
+	fast := SelectFast(ctx, in)
+	go sleepAndSend(20, in, 1)
+	go sleepAndClose(30, in)
+
+	_, exist := <-fast
+	if exist {
+		t.Error("should recv false")
+	}
+}

component/simple-obfs/tls.go

@@ -14,6 +14,10 @@ func init() {
 	rand.Seed(time.Now().Unix())
 }
 
+const (
+	chunkSize = 1 << 14 // 2 ** 14 == 16 * 1024
+)
+
 var bufPool = sync.Pool{New: func() interface{} { return make([]byte, 2048) }}
 
 // TLSObfs is shadowsocks tls simple-obfs implementation
@@ -75,8 +79,23 @@ func (to *TLSObfs) Read(b []byte) (int, error) {
 	// type + ver = 3
 	return to.read(b, 3)
 }
-
 func (to *TLSObfs) Write(b []byte) (int, error) {
+	length := len(b)
+	for i := 0; i < length; i += chunkSize {
+		end := i + chunkSize
+		if end > length {
+			end = length
+		}
+
+		n, err := to.write(b[i:end])
+		if err != nil {
+			return n, err
+		}
+	}
+	return length, nil
+}
+
+func (to *TLSObfs) write(b []byte) (int, error) {
 	if to.firstRequest {
 		helloMsg := makeClientHelloMsg(b, to.server)
 		_, err := to.Conn.Write(helloMsg)
@@ -107,9 +126,8 @@ func NewTLSObfs(conn net.Conn, server string) net.Conn {
 }
 
 func makeClientHelloMsg(data []byte, server string) []byte {
-	random := make([]byte, 32)
+	random := make([]byte, 28)
 	sessionID := make([]byte, 32)
-	size := make([]byte, 2)
 	rand.Read(random)
 	rand.Read(sessionID)
 
@@ -124,12 +142,12 @@ func makeClientHelloMsg(data []byte, server string) []byte {
 
 	// clientHello, length, TLS 1.2 version
 	buf.WriteByte(1)
-	binary.BigEndian.PutUint16(size, uint16(208+len(data)+len(server)))
 	buf.WriteByte(0)
-	buf.Write(size)
+	binary.Write(buf, binary.BigEndian, uint16(208+len(data)+len(server)))
 	buf.Write([]byte{0x03, 0x03})
 
-	// random, sid len, sid
+	// random with timestamp, sid len, sid
+	binary.Write(buf, binary.BigEndian, uint32(time.Now().Unix()))
 	buf.Write(random)
 	buf.WriteByte(32)
 	buf.Write(sessionID)
@@ -147,24 +165,19 @@ func makeClientHelloMsg(data []byte, server string) []byte {
 	buf.Write([]byte{0x01, 0x00})
 
 	// extension length
-	binary.BigEndian.PutUint16(size, uint16(79+len(data)+len(server)))
+	binary.Write(buf, binary.BigEndian, uint16(79+len(data)+len(server)))
-	buf.Write(size)
 
 	// session ticket
 	buf.Write([]byte{0x00, 0x23})
-	binary.BigEndian.PutUint16(size, uint16(len(data)))
+	binary.Write(buf, binary.BigEndian, uint16(len(data)))
-	buf.Write(size)
 	buf.Write(data)
 
 	// server name
 	buf.Write([]byte{0x00, 0x00})
-	binary.BigEndian.PutUint16(size, uint16(len(server)+5))
+	binary.Write(buf, binary.BigEndian, uint16(len(server)+5))
-	buf.Write(size)
+	binary.Write(buf, binary.BigEndian, uint16(len(server)+3))
-	binary.BigEndian.PutUint16(size, uint16(len(server)+3))
-	buf.Write(size)
 	buf.WriteByte(0)
-	binary.BigEndian.PutUint16(size, uint16(len(server)))
+	binary.Write(buf, binary.BigEndian, uint16(len(server)))
-	buf.Write(size)
 	buf.Write([]byte(server))
 
 	// ec_point

component/vmess/conn.go

@@ -65,11 +65,10 @@ func (vc *Conn) Read(b []byte) (int, error) {
 }
 
 func (vc *Conn) sendRequest() error {
-	timestamp := make([]byte, 8)
+	timestamp := time.Now()
-	binary.BigEndian.PutUint64(timestamp, uint64(time.Now().UTC().Unix()))
 
 	h := hmac.New(md5.New, vc.id.UUID.Bytes())
-	h.Write(timestamp)
+	binary.Write(h, binary.BigEndian, uint64(timestamp.Unix()))
 	_, err := vc.Conn.Write(h.Sum(nil))
 	if err != nil {
 		return err
@@ -111,7 +110,7 @@ func (vc *Conn) sendRequest() error {
 		return err
 	}
 
-	stream := cipher.NewCFBEncrypter(block, hashTimestamp(time.Now().UTC()))
+	stream := cipher.NewCFBEncrypter(block, hashTimestamp(timestamp))
 	stream.XORKeyStream(buf.Bytes(), buf.Bytes())
 	_, err = vc.Conn.Write(buf.Bytes())
 	return err
@@ -145,7 +144,7 @@ func (vc *Conn) recvResponse() error {
 func hashTimestamp(t time.Time) []byte {
 	md5hash := md5.New()
 	ts := make([]byte, 8)
-	binary.BigEndian.PutUint64(ts, uint64(t.UTC().Unix()))
+	binary.BigEndian.PutUint64(ts, uint64(t.Unix()))
 	md5hash.Write(ts)
 	md5hash.Write(ts)
 	md5hash.Write(ts)

component/vmess/vmess.go

@@ -5,12 +5,10 @@ import (
 	"fmt"
 	"math/rand"
 	"net"
-	"net/url"
 	"runtime"
-	"time"
+	"sync"
 
 	"github.com/gofrs/uuid"
-	"github.com/gorilla/websocket"
 )
 
 // Version of vmess
@@ -39,6 +37,11 @@ var CipherMapping = map[string]byte{
 	"chacha20-poly1305": SecurityCHACHA20POLY1305,
 }
 
+var (
+	clientSessionCache tls.ClientSessionCache
+	once               sync.Once
+)
+
 // Command types
 const (
 	CommandTCP byte = 1
@@ -61,14 +64,13 @@ type DstAddr struct {
 
 // Client is vmess connection generator
 type Client struct {
-	user           []*ID
+	user      []*ID
-	uuid           *uuid.UUID
+	uuid      *uuid.UUID
-	security       Security
+	security  Security
-	tls            bool
+	tls       bool
-	host           string
+	host      string
-	websocket      bool
+	wsConfig  *websocketConfig
-	websocketPath  string
+	tlsConfig *tls.Config
-	skipCertVerify bool
 }
 
 // Config of vmess
@@ -77,58 +79,25 @@ type Config struct {
 	AlterID        uint16
 	Security       string
 	TLS            bool
-	Host           string
+	HostName       string
+	Port           string
 	NetWork        string
 	WebSocketPath  string
 	SkipCertVerify bool
+	SessionCacahe  tls.ClientSessionCache
 }
 
 // New return a Conn with net.Conn and DstAddr
 func (c *Client) New(conn net.Conn, dst *DstAddr) (net.Conn, error) {
+	var err error
 	r := rand.Intn(len(c.user))
-	if c.websocket {
+	if c.wsConfig != nil {
-		dialer := &websocket.Dialer{
+		conn, err = newWebsocketConn(conn, c.wsConfig)
-			NetDial: func(network, addr string) (net.Conn, error) {
-				return conn, nil
-			},
-			ReadBufferSize:   4 * 1024,
-			WriteBufferSize:  4 * 1024,
-			HandshakeTimeout: time.Second * 8,
-		}
-		scheme := "ws"
-		if c.tls {
-			scheme = "wss"
-			dialer.TLSClientConfig = &tls.Config{
-				InsecureSkipVerify: c.skipCertVerify,
-			}
-		}
-
-		host, port, err := net.SplitHostPort(c.host)
-		if (scheme == "ws" && port != "80") || (scheme == "wss" && port != "443") {
-			host = c.host
-		}
-
-		uri := url.URL{
-			Scheme: scheme,
-			Host:   host,
-			Path:   c.websocketPath,
-		}
-
-		wsConn, resp, err := dialer.Dial(uri.String(), nil)
 		if err != nil {
-			var reason string
+			return nil, err
-			if resp != nil {
-				reason = resp.Status
-			}
-			println(uri.String(), err.Error())
-			return nil, fmt.Errorf("Dial %s error: %s", host, reason)
 		}
-
-		conn = newWebsocketConn(wsConn, conn.RemoteAddr())
 	} else if c.tls {
-		conn = tls.Client(conn, &tls.Config{
+		conn = tls.Client(conn, c.tlsConfig)
-			InsecureSkipVerify: c.skipCertVerify,
-		})
 	}
 	return newConn(conn, c.user[r], dst, c.security), nil
 }
@@ -161,13 +130,44 @@ func NewClient(config Config) (*Client, error) {
 		return nil, fmt.Errorf("Unknown network type: %s", config.NetWork)
 	}
 
+	host := net.JoinHostPort(config.HostName, config.Port)
+
+	var tlsConfig *tls.Config
+	if config.TLS {
+		tlsConfig = &tls.Config{
+			ServerName:         config.HostName,
+			InsecureSkipVerify: config.SkipCertVerify,
+			ClientSessionCache: config.SessionCacahe,
+		}
+		if tlsConfig.ClientSessionCache == nil {
+			tlsConfig.ClientSessionCache = getClientSessionCache()
+		}
+	}
+
+	var wsConfig *websocketConfig
+	if config.NetWork == "ws" {
+		wsConfig = &websocketConfig{
+			host:      host,
+			path:      config.WebSocketPath,
+			tls:       config.TLS,
+			tlsConfig: tlsConfig,
+		}
+	}
+
 	return &Client{
-		user:          newAlterIDs(newID(&uid), config.AlterID),
+		user:      newAlterIDs(newID(&uid), config.AlterID),
-		uuid:          &uid,
+		uuid:      &uid,
-		security:      security,
+		security:  security,
-		tls:           config.TLS,
+		tls:       config.TLS,
-		host:          config.Host,
+		host:      host,
-		websocket:     config.NetWork == "ws",
+		wsConfig:  wsConfig,
-		websocketPath: config.WebSocketPath,
+		tlsConfig: tlsConfig,
 	}, nil
 }
+
+func getClientSessionCache() tls.ClientSessionCache {
+	once.Do(func() {
+		clientSessionCache = tls.NewLRUClientSessionCache(128)
+	})
+	return clientSessionCache
+}

component/vmess/websocket.go

@@ -1,9 +1,11 @@
 package vmess
 
 import (
+	"crypto/tls"
 	"fmt"
 	"io"
 	"net"
+	"net/url"
 	"strings"
 	"time"
 
@@ -16,6 +18,13 @@ type websocketConn struct {
 	remoteAddr net.Addr
 }
 
+type websocketConfig struct {
+	host      string
+	path      string
+	tls       bool
+	tlsConfig *tls.Config
+}
+
 // Read implements net.Conn.Read()
 func (wsc *websocketConn) Read(b []byte) (int, error) {
 	for {
@@ -91,9 +100,44 @@ func (wsc *websocketConn) SetWriteDeadline(t time.Time) error {
 	return wsc.conn.SetWriteDeadline(t)
 }
 
-func newWebsocketConn(conn *websocket.Conn, remoteAddr net.Addr) net.Conn {
+func newWebsocketConn(conn net.Conn, c *websocketConfig) (net.Conn, error) {
-	return &websocketConn{
+	dialer := &websocket.Dialer{
-		conn:       conn,
+		NetDial: func(network, addr string) (net.Conn, error) {
-		remoteAddr: remoteAddr,
+			return conn, nil
+		},
+		ReadBufferSize:   4 * 1024,
+		WriteBufferSize:  4 * 1024,
+		HandshakeTimeout: time.Second * 8,
 	}
+
+	scheme := "ws"
+	if c.tls {
+		scheme = "wss"
+		dialer.TLSClientConfig = c.tlsConfig
+	}
+
+	host, port, err := net.SplitHostPort(c.host)
+	if (scheme == "ws" && port != "80") || (scheme == "wss" && port != "443") {
+		host = c.host
+	}
+
+	uri := url.URL{
+		Scheme: scheme,
+		Host:   host,
+		Path:   c.path,
+	}
+
+	wsConn, resp, err := dialer.Dial(uri.String(), nil)
+	if err != nil {
+		var reason string
+		if resp != nil {
+			reason = resp.Status
+		}
+		return nil, fmt.Errorf("Dial %s error: %s", host, reason)
+	}
+
+	return &websocketConn{
+		conn:       wsConn,
+		remoteAddr: conn.RemoteAddr(),
+	}, nil
 }

config/config.go

@@ -3,94 +3,82 @@ package config
 import (
 	"fmt"
 	"io/ioutil"
+	"net"
+	"net/url"
 	"os"
 	"strings"
-	"sync"
-	"time"
 
 	adapters "github.com/Dreamacro/clash/adapters/outbound"
-	"github.com/Dreamacro/clash/common/observable"
 	"github.com/Dreamacro/clash/common/structure"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/dns"
+	"github.com/Dreamacro/clash/log"
 	R "github.com/Dreamacro/clash/rules"
+	T "github.com/Dreamacro/clash/tunnel"
 
-	log "github.com/sirupsen/logrus"
 	yaml "gopkg.in/yaml.v2"
 )
 
-var (
-	config *Config
-	once   sync.Once
-)
-
 // General config
 type General struct {
-	Port      int
+	Port               int          `json:"port"`
-	SocksPort int
+	SocksPort          int          `json:"socks-port"`
-	RedirPort int
+	RedirPort          int          `json:"redir-port"`
-	AllowLan  bool
+	AllowLan           bool         `json:"allow-lan"`
-	Mode      Mode
+	Mode               T.Mode       `json:"mode"`
-	LogLevel  C.LogLevel
+	LogLevel           log.LogLevel `json:"log-level"`
+	ExternalController string       `json:"external-controller,omitempty"`
+	Secret             string       `json:"secret,omitempty"`
 }
 
-// ProxyConfig is update proxy schema
+// DNS config
-type ProxyConfig struct {
+type DNS struct {
-	Port      *int
+	Enable       bool             `yaml:"enable"`
-	SocksPort *int
+	IPv6         bool             `yaml:"ipv6"`
-	RedirPort *int
+	NameServer   []dns.NameServer `yaml:"nameserver"`
-	AllowLan  *bool
+	Fallback     []dns.NameServer `yaml:"fallback"`
+	Listen       string           `yaml:"listen"`
+	EnhancedMode dns.EnhancedMode `yaml:"enhanced-mode"`
 }
 
-// RawConfig is raw config struct
+// Config is clash config manager
-type RawConfig struct {
+type Config struct {
-	Port               int    `yaml:"port"`
+	General *General
-	SocksPort          int    `yaml:"socks-port"`
+	DNS     *DNS
-	RedirPort          int    `yaml:"redir-port"`
+	Rules   []C.Rule
-	AllowLan           bool   `yaml:"allow-lan"`
+	Proxies map[string]C.Proxy
-	Mode               string `yaml:"mode"`
+}
-	LogLevel           string `yaml:"log-level"`
-	ExternalController string `yaml:"external-controller"`
-	Secret             string `yaml:"secret"`
 
+type rawDNS struct {
+	Enable       bool             `yaml:"enable"`
+	IPv6         bool             `yaml:"ipv6"`
+	NameServer   []string         `yaml:"nameserver"`
+	Fallback     []string         `yaml:"fallback"`
+	Listen       string           `yaml:"listen"`
+	EnhancedMode dns.EnhancedMode `yaml:"enhanced-mode"`
+}
+
+type rawConfig struct {
+	Port               int          `yaml:"port"`
+	SocksPort          int          `yaml:"socks-port"`
+	RedirPort          int          `yaml:"redir-port"`
+	AllowLan           bool         `yaml:"allow-lan"`
+	Mode               T.Mode       `yaml:"mode"`
+	LogLevel           log.LogLevel `yaml:"log-level"`
+	ExternalController string       `yaml:"external-controller"`
+	Secret             string       `yaml:"secret"`
+
+	DNS        *rawDNS                  `yaml:"dns"`
 	Proxy      []map[string]interface{} `yaml:"Proxy"`
 	ProxyGroup []map[string]interface{} `yaml:"Proxy Group"`
 	Rule       []string                 `yaml:"Rule"`
 }
 
-// Config is clash config manager
+func readConfig(path string) (*rawConfig, error) {
-type Config struct {
+	if _, err := os.Stat(path); os.IsNotExist(err) {
-	general    *General
-	rules      []C.Rule
-	proxies    map[string]C.Proxy
-	lastUpdate time.Time
-
-	event      chan<- interface{}
-	reportCh   chan interface{}
-	observable *observable.Observable
-}
-
-// Event is event of clash config
-type Event struct {
-	Type    string
-	Payload interface{}
-}
-
-// Subscribe config stream
-func (c *Config) Subscribe() observable.Subscription {
-	sub, _ := c.observable.Subscribe()
-	return sub
-}
-
-// Report return a channel for collecting report message
-func (c *Config) Report() chan<- interface{} {
-	return c.reportCh
-}
-
-func (c *Config) readConfig() (*RawConfig, error) {
-	if _, err := os.Stat(C.Path.Config()); os.IsNotExist(err) {
 		return nil, err
 	}
-	data, err := ioutil.ReadFile(C.Path.Config())
+	data, err := ioutil.ReadFile(path)
 	if err != nil {
 		return nil, err
 	}
@@ -100,144 +88,81 @@ func (c *Config) readConfig() (*RawConfig, error) {
 	}
 
 	// config with some default value
-	rawConfig := &RawConfig{
+	rawConfig := &rawConfig{
 		AllowLan:   false,
-		Mode:       Rule.String(),
+		Mode:       T.Rule,
-		LogLevel:   C.INFO.String(),
+		LogLevel:   log.INFO,
 		Rule:       []string{},
 		Proxy:      []map[string]interface{}{},
 		ProxyGroup: []map[string]interface{}{},
+		DNS: &rawDNS{
+			Enable: false,
+		},
 	}
 	err = yaml.Unmarshal([]byte(data), &rawConfig)
 	return rawConfig, err
 }
 
 // Parse config
-func (c *Config) Parse() error {
+func Parse(path string) (*Config, error) {
-	cfg, err := c.readConfig()
+	config := &Config{}
+
+	rawCfg, err := readConfig(path)
 	if err != nil {
-		return err
+		return nil, err
 	}
 
-	if err := c.parseGeneral(cfg); err != nil {
+	general, err := parseGeneral(rawCfg)
-		return err
-	}
-
-	if err := c.parseProxies(cfg); err != nil {
-		return err
-	}
-
-	return c.parseRules(cfg)
-}
-
-// Proxies return proxies of clash
-func (c *Config) Proxies() map[string]C.Proxy {
-	return c.proxies
-}
-
-// Rules return rules of clash
-func (c *Config) Rules() []C.Rule {
-	return c.rules
-}
-
-// SetMode change mode of clash
-func (c *Config) SetMode(mode Mode) {
-	c.general.Mode = mode
-	c.event <- &Event{Type: "mode", Payload: mode}
-}
-
-// SetLogLevel change log level of clash
-func (c *Config) SetLogLevel(level C.LogLevel) {
-	c.general.LogLevel = level
-	c.event <- &Event{Type: "log-level", Payload: level}
-}
-
-// General return clash general config
-func (c *Config) General() General {
-	return *c.general
-}
-
-// UpdateRules is a function for hot reload rules
-func (c *Config) UpdateRules() error {
-	cfg, err := c.readConfig()
 	if err != nil {
-		return err
+		return nil, err
 	}
+	config.General = general
 
-	return c.parseRules(cfg)
+	proxies, err := parseProxies(rawCfg)
+	if err != nil {
+		return nil, err
+	}
+	config.Proxies = proxies
+
+	rules, err := parseRules(rawCfg)
+	if err != nil {
+		return nil, err
+	}
+	config.Rules = rules
+
+	dnsCfg, err := parseDNS(rawCfg.DNS)
+	if err != nil {
+		return nil, err
+	}
+	config.DNS = dnsCfg
+
+	return config, nil
 }
 
-func (c *Config) parseGeneral(cfg *RawConfig) error {
+func parseGeneral(cfg *rawConfig) (*General, error) {
 	port := cfg.Port
 	socksPort := cfg.SocksPort
 	redirPort := cfg.RedirPort
 	allowLan := cfg.AllowLan
-	logLevelString := cfg.LogLevel
+	externalController := cfg.ExternalController
-	modeString := cfg.Mode
+	secret := cfg.Secret
+	mode := cfg.Mode
+	logLevel := cfg.LogLevel
 
-	mode, exist := ModeMapping[modeString]
+	general := &General{
-	if !exist {
+		Port:               port,
-		return fmt.Errorf("General.mode value invalid")
+		SocksPort:          socksPort,
+		RedirPort:          redirPort,
+		AllowLan:           allowLan,
+		Mode:               mode,
+		LogLevel:           logLevel,
+		ExternalController: externalController,
+		Secret:             secret,
 	}
-
+	return general, nil
-	logLevel, exist := C.LogLevelMapping[logLevelString]
-	if !exist {
-		return fmt.Errorf("General.log-level value invalid")
-	}
-
-	c.general = &General{
-		Port:      port,
-		SocksPort: socksPort,
-		RedirPort: redirPort,
-		AllowLan:  allowLan,
-		Mode:      mode,
-		LogLevel:  logLevel,
-	}
-
-	if restAddr := cfg.ExternalController; restAddr != "" {
-		c.event <- &Event{Type: "external-controller", Payload: restAddr}
-		c.event <- &Event{Type: "secret", Payload: cfg.Secret}
-	}
-
-	c.UpdateGeneral(*c.general)
-	return nil
 }
 
-// UpdateGeneral dispatch update event
+func parseProxies(cfg *rawConfig) (map[string]C.Proxy, error) {
-func (c *Config) UpdateGeneral(general General) {
-	c.UpdateProxy(ProxyConfig{
-		Port:      &general.Port,
-		SocksPort: &general.SocksPort,
-		RedirPort: &general.RedirPort,
-		AllowLan:  &general.AllowLan,
-	})
-	c.event <- &Event{Type: "mode", Payload: general.Mode}
-	c.event <- &Event{Type: "log-level", Payload: general.LogLevel}
-}
-
-// UpdateProxy dispatch update proxy event
-func (c *Config) UpdateProxy(pc ProxyConfig) {
-	if pc.AllowLan != nil {
-		c.general.AllowLan = *pc.AllowLan
-	}
-
-	c.general.Port = *or(pc.Port, &c.general.Port)
-	if c.general.Port != 0 && (pc.AllowLan != nil || pc.Port != nil) {
-		c.event <- &Event{Type: "http-addr", Payload: genAddr(c.general.Port, c.general.AllowLan)}
-	}
-
-	c.general.SocksPort = *or(pc.SocksPort, &c.general.SocksPort)
-	if c.general.SocksPort != 0 && (pc.AllowLan != nil || pc.SocksPort != nil) {
-		c.event <- &Event{Type: "socks-addr", Payload: genAddr(c.general.SocksPort, c.general.AllowLan)}
-	}
-
-	c.general.RedirPort = *or(pc.RedirPort, &c.general.RedirPort)
-	if c.general.RedirPort != 0 && (pc.AllowLan != nil || pc.RedirPort != nil) {
-		c.event <- &Event{Type: "redir-addr", Payload: genAddr(c.general.RedirPort, c.general.AllowLan)}
-	}
-}
-
-func (c *Config) parseProxies(cfg *RawConfig) error {
 	proxies := make(map[string]C.Proxy)
 	proxiesConfig := cfg.Proxy
 	groupsConfig := cfg.ProxyGroup
@@ -251,7 +176,7 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 	for idx, mapping := range proxiesConfig {
 		proxyType, existType := mapping["type"].(string)
 		if !existType {
-			return fmt.Errorf("Proxy %d missing type", idx)
+			return nil, fmt.Errorf("Proxy %d missing type", idx)
 		}
 
 		var proxy C.Proxy
@@ -271,6 +196,13 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 				break
 			}
 			proxy = adapters.NewSocks5(*socksOption)
+		case "http":
+			httpOption := &adapters.HttpOption{}
+			err = decoder.Decode(mapping, httpOption)
+			if err != nil {
+				break
+			}
+			proxy = adapters.NewHttp(*httpOption)
 		case "vmess":
 			vmessOption := &adapters.VmessOption{}
 			err = decoder.Decode(mapping, vmessOption)
@@ -279,15 +211,15 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 			}
 			proxy, err = adapters.NewVmess(*vmessOption)
 		default:
-			return fmt.Errorf("Unsupport proxy type: %s", proxyType)
+			return nil, fmt.Errorf("Unsupport proxy type: %s", proxyType)
 		}
 
 		if err != nil {
-			return fmt.Errorf("Proxy [%d]: %s", idx, err.Error())
+			return nil, fmt.Errorf("Proxy [%d]: %s", idx, err.Error())
 		}
 
 		if _, exist := proxies[proxy.Name()]; exist {
-			return fmt.Errorf("Proxy %s is the duplicate name", proxy.Name())
+			return nil, fmt.Errorf("Proxy %s is the duplicate name", proxy.Name())
 		}
 		proxies[proxy.Name()] = proxy
 	}
@@ -297,11 +229,11 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 		groupType, existType := mapping["type"].(string)
 		groupName, existName := mapping["name"].(string)
 		if !existType && existName {
-			return fmt.Errorf("ProxyGroup %d: missing type or name", idx)
+			return nil, fmt.Errorf("ProxyGroup %d: missing type or name", idx)
 		}
 
 		if _, exist := proxies[groupName]; exist {
-			return fmt.Errorf("ProxyGroup %s: the duplicate name", groupName)
+			return nil, fmt.Errorf("ProxyGroup %s: the duplicate name", groupName)
 		}
 		var group C.Proxy
 		var err error
@@ -315,7 +247,7 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 
 			ps, err := getProxies(proxies, urlTestOption.Proxies)
 			if err != nil {
-				return fmt.Errorf("ProxyGroup %s: %s", groupName, err.Error())
+				return nil, fmt.Errorf("ProxyGroup %s: %s", groupName, err.Error())
 			}
 			group, err = adapters.NewURLTest(*urlTestOption, ps)
 		case "select":
@@ -327,7 +259,7 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 
 			ps, err := getProxies(proxies, selectorOption.Proxies)
 			if err != nil {
-				return fmt.Errorf("ProxyGroup %s: %s", groupName, err.Error())
+				return nil, fmt.Errorf("ProxyGroup %s: %s", groupName, err.Error())
 			}
 			group, err = adapters.NewSelector(selectorOption.Name, ps)
 		case "fallback":
@@ -339,12 +271,12 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 
 			ps, err := getProxies(proxies, fallbackOption.Proxies)
 			if err != nil {
-				return fmt.Errorf("ProxyGroup %s: %s", groupName, err.Error())
+				return nil, fmt.Errorf("ProxyGroup %s: %s", groupName, err.Error())
 			}
 			group, err = adapters.NewFallback(*fallbackOption, ps)
 		}
 		if err != nil {
-			return fmt.Errorf("Proxy %s: %s", groupName, err.Error())
+			return nil, fmt.Errorf("Proxy %s: %s", groupName, err.Error())
 		}
 		proxies[groupName] = group
 	}
@@ -355,97 +287,124 @@ func (c *Config) parseProxies(cfg *RawConfig) error {
 	}
 
 	proxies["GLOBAL"], _ = adapters.NewSelector("GLOBAL", ps)
-
+	return proxies, nil
-	// close old goroutine
-	for _, proxy := range c.proxies {
-		switch raw := proxy.(type) {
-		case *adapters.URLTest:
-			raw.Close()
-		case *adapters.Fallback:
-			raw.Close()
-		}
-	}
-	c.proxies = proxies
-	c.event <- &Event{Type: "proxies", Payload: proxies}
-	return nil
 }
 
-func (c *Config) parseRules(cfg *RawConfig) error {
+func parseRules(cfg *rawConfig) ([]C.Rule, error) {
 	rules := []C.Rule{}
 
 	rulesConfig := cfg.Rule
 	// parse rules
-	for _, line := range rulesConfig {
+	for idx, line := range rulesConfig {
-		rule := strings.Split(line, ",")
+		rule := trimArr(strings.Split(line, ","))
-		if len(rule) < 3 {
+		var (
-			continue
+			payload string
+			target  string
+		)
+
+		switch len(rule) {
+		case 2:
+			target = rule[1]
+		case 3:
+			payload = rule[1]
+			target = rule[2]
+		default:
+			return nil, fmt.Errorf("Rules[%d] error: format invalid", idx)
 		}
+
 		rule = trimArr(rule)
 		switch rule[0] {
 		case "DOMAIN":
-			rules = append(rules, R.NewDomain(rule[1], rule[2]))
+			rules = append(rules, R.NewDomain(payload, target))
 		case "DOMAIN-SUFFIX":
-			rules = append(rules, R.NewDomainSuffix(rule[1], rule[2]))
+			rules = append(rules, R.NewDomainSuffix(payload, target))
 		case "DOMAIN-KEYWORD":
-			rules = append(rules, R.NewDomainKeyword(rule[1], rule[2]))
+			rules = append(rules, R.NewDomainKeyword(payload, target))
 		case "GEOIP":
-			rules = append(rules, R.NewGEOIP(rule[1], rule[2]))
+			rules = append(rules, R.NewGEOIP(payload, target))
 		case "IP-CIDR", "IP-CIDR6":
-			rules = append(rules, R.NewIPCIDR(rule[1], rule[2]))
+			rules = append(rules, R.NewIPCIDR(payload, target))
+		case "MATCH":
+			fallthrough
 		case "FINAL":
-			rules = append(rules, R.NewFinal(rule[2]))
+			rules = append(rules, R.NewFinal(target))
 		}
 	}
 
-	c.rules = rules
+	return rules, nil
-	c.event <- &Event{Type: "rules", Payload: rules}
-	return nil
 }
 
-func (c *Config) handleResponseMessage() {
+func hostWithDefaultPort(host string, defPort string) (string, error) {
-	for elm := range c.reportCh {
+	if !strings.Contains(host, ":") {
-		event := elm.(*Event)
+		host += ":"
-		switch event.Type {
+	}
-		case "http-addr":
+
-			if event.Payload.(bool) == false {
+	hostname, port, err := net.SplitHostPort(host)
-				log.Errorf("Listening HTTP proxy at %d error", c.general.Port)
+	if err != nil {
-				c.general.Port = 0
+		return "", err
-			}
+	}
-		case "socks-addr":
+
-			if event.Payload.(bool) == false {
+	if port == "" {
-				log.Errorf("Listening SOCKS proxy at %d error", c.general.SocksPort)
+		port = defPort
-				c.general.SocksPort = 0
+	}
-			}
+
-		case "redir-addr":
+	return net.JoinHostPort(hostname, port), nil
-			if event.Payload.(bool) == false {
+}
-				log.Errorf("Listening Redir proxy at %d error", c.general.RedirPort)
+
-				c.general.RedirPort = 0
+func parseNameServer(servers []string) ([]dns.NameServer, error) {
-			}
+	nameservers := []dns.NameServer{}
+	log.Debugln("%#v", servers)
+
+	for idx, server := range servers {
+		// parse without scheme .e.g 8.8.8.8:53
+		if host, err := hostWithDefaultPort(server, "53"); err == nil {
+			nameservers = append(
+				nameservers,
+				dns.NameServer{Addr: host},
+			)
+			continue
 		}
+
+		u, err := url.Parse(server)
+		if err != nil {
+			return nil, fmt.Errorf("DNS NameServer[%d] format error: %s", idx, err.Error())
+		}
+
+		if u.Scheme != "tls" {
+			return nil, fmt.Errorf("DNS NameServer[%d] unsupport scheme: %s", idx, u.Scheme)
+		}
+
+		host, err := hostWithDefaultPort(u.Host, "853")
+		nameservers = append(
+			nameservers,
+			dns.NameServer{
+				Net:  "tcp-tls",
+				Addr: host,
+			},
+		)
 	}
+
+	return nameservers, nil
 }
 
-func newConfig() *Config {
+func parseDNS(cfg *rawDNS) (*DNS, error) {
-	event := make(chan interface{})
+	if cfg.Enable && len(cfg.NameServer) == 0 {
-	reportCh := make(chan interface{})
+		return nil, fmt.Errorf("If DNS configuration is turned on, NameServer cannot be empty")
-	config := &Config{
-		general:    &General{},
-		proxies:    make(map[string]C.Proxy),
-		rules:      []C.Rule{},
-		lastUpdate: time.Now(),
-
-		event:      event,
-		reportCh:   reportCh,
-		observable: observable.NewObservable(event),
 	}
-	go config.handleResponseMessage()
-	return config
-}
 
-// Instance return singleton instance of Config
+	dnsCfg := &DNS{
-func Instance() *Config {
+		Enable:       cfg.Enable,
-	once.Do(func() {
+		Listen:       cfg.Listen,
-		config = newConfig()
+		EnhancedMode: cfg.EnhancedMode,
-	})
+	}
-	return config
+
+	if nameserver, err := parseNameServer(cfg.NameServer); err == nil {
+		dnsCfg.NameServer = nameserver
+	}
+
+	if fallback, err := parseNameServer(cfg.Fallback); err == nil {
+		dnsCfg.Fallback = fallback
+	}
+
+	return dnsCfg, nil
 }

config/initial.go

@@ -3,6 +3,7 @@ package config
 import (
 	"archive/tar"
 	"compress/gzip"
+	"fmt"
 	"io"
 	"net/http"
 	"os"
@@ -54,15 +55,15 @@ func downloadMMDB(path string) (err error) {
 }
 
 // Init prepare necessary files
-func Init() {
+func Init(dir string) error {
 	// initial homedir
-	if _, err := os.Stat(C.Path.HomeDir()); os.IsNotExist(err) {
+	if _, err := os.Stat(dir); os.IsNotExist(err) {
-		if err := os.MkdirAll(C.Path.HomeDir(), 0777); err != nil {
+		if err := os.MkdirAll(dir, 0777); err != nil {
-			log.Fatalf("Can't create config directory %s: %s", C.Path.HomeDir(), err.Error())
+			return fmt.Errorf("Can't create config directory %s: %s", dir, err.Error())
 		}
 	}
 
-	// initial config.ini
+	// initial config.yml
 	if _, err := os.Stat(C.Path.Config()); os.IsNotExist(err) {
 		log.Info("Can't find config, create a empty file")
 		os.OpenFile(C.Path.Config(), os.O_CREATE|os.O_WRONLY, 0644)
@@ -73,7 +74,8 @@ func Init() {
 		log.Info("Can't find MMDB, start download")
 		err := downloadMMDB(C.Path.MMDB())
 		if err != nil {
-			log.Fatalf("Can't download MMDB: %s", err.Error())
+			return fmt.Errorf("Can't download MMDB: %s", err.Error())
 		}
 	}
+	return nil
 }

config/mode.go

@@ -1,31 +0,0 @@
-package config
-
-type Mode int
-
-var (
-	// ModeMapping is a mapping for Mode enum
-	ModeMapping = map[string]Mode{
-		"Global": Global,
-		"Rule":   Rule,
-		"Direct": Direct,
-	}
-)
-
-const (
-	Global Mode = iota
-	Rule
-	Direct
-)
-
-func (m Mode) String() string {
-	switch m {
-	case Global:
-		return "Global"
-	case Rule:
-		return "Rule"
-	case Direct:
-		return "Direct"
-	default:
-		return "Unknow"
-	}
-}

config/utils.go

@@ -14,13 +14,6 @@ func trimArr(arr []string) (r []string) {
 	return
 }
 
-func genAddr(port int, allowLan bool) string {
-	if allowLan {
-		return fmt.Sprintf(":%d", port)
-	}
-	return fmt.Sprintf("127.0.0.1:%d", port)
-}
-
 func getProxies(mapping map[string]C.Proxy, list []string) ([]C.Proxy, error) {
 	var ps []C.Proxy
 	for _, name := range list {

constant/adapters.go

@@ -12,6 +12,7 @@ const (
 	Selector
 	Shadowsocks
 	Socks5
+	Http
 	URLTest
 	Vmess
 )
@@ -30,6 +31,7 @@ type Proxy interface {
 	Name() string
 	Type() AdapterType
 	Generator(metadata *Metadata) (ProxyAdapter, error)
+	MarshalJSON() ([]byte, error)
 }
 
 // AdapterType is enum of adapter type
@@ -49,6 +51,8 @@ func (at AdapterType) String() string {
 		return "Shadowsocks"
 	case Socks5:
 		return "Socks5"
+	case Http:
+		return "Http"
 	case URLTest:
 		return "URLTest"
 	case Vmess:

constant/config.go

@@ -1,10 +0,0 @@
-package constant
-
-type General struct {
-	Mode      *string `json:"mode,omitempty"`
-	AllowLan  *bool   `json:"allow-lan,omitempty"`
-	Port      *int    `json:"port,omitempty"`
-	SocksPort *int    `json:"socks-port,omitempty"`
-	RedirPort *int    `json:"redir-port,omitempty"`
-	LogLevel  *string `json:"log-level,omitempty"`
-}

constant/log.go

@@ -1,35 +0,0 @@
-package constant
-
-var (
-	// LogLevelMapping is a mapping for LogLevel enum
-	LogLevelMapping = map[string]LogLevel{
-		"error":   ERROR,
-		"warning": WARNING,
-		"info":    INFO,
-		"debug":   DEBUG,
-	}
-)
-
-const (
-	ERROR LogLevel = iota
-	WARNING
-	INFO
-	DEBUG
-)
-
-type LogLevel int
-
-func (l LogLevel) String() string {
-	switch l {
-	case INFO:
-		return "info"
-	case WARNING:
-		return "warning"
-	case ERROR:
-		return "error"
-	case DEBUG:
-		return "debug"
-	default:
-		return "unknow"
-	}
-}

constant/metadata.go

@@ -15,6 +15,7 @@ const (
 
 	HTTP SourceType = iota
 	SOCKS
+	REDIR
 )
 
 type NetWork int

constant/proxy.go

@@ -1,7 +0,0 @@
-package constant
-
-// ProxySignal is used to handle graceful shutdown of proxy
-type ProxySignal struct {
-	Done   chan<- struct{}
-	Closed <-chan struct{}
-}

dns/client.go

@@ -0,0 +1,265 @@
+package dns
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"net"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/Dreamacro/clash/common/cache"
+	"github.com/Dreamacro/clash/common/picker"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
+
+	D "github.com/miekg/dns"
+	geoip2 "github.com/oschwald/geoip2-golang"
+)
+
+var (
+	globalSessionCache = tls.NewLRUClientSessionCache(64)
+
+	mmdb     *geoip2.Reader
+	once     sync.Once
+	resolver *Resolver
+)
+
+type Resolver struct {
+	ipv6     bool
+	mapping  bool
+	fallback []*nameserver
+	main     []*nameserver
+	cache    *cache.Cache
+}
+
+type result struct {
+	Msg   *D.Msg
+	Error error
+}
+
+func isIPRequest(q D.Question) bool {
+	if q.Qclass == D.ClassINET && (q.Qtype == D.TypeA || q.Qtype == D.TypeAAAA) {
+		return true
+	}
+	return false
+}
+
+func (r *Resolver) Exchange(m *D.Msg) (msg *D.Msg, err error) {
+	if len(m.Question) == 0 {
+		return nil, errors.New("should have one question at least")
+	}
+
+	q := m.Question[0]
+	cache := r.cache.Get(q.String())
+	if cache != nil {
+		return cache.(*D.Msg).Copy(), nil
+	}
+	defer func() {
+		if msg != nil {
+			putMsgToCache(r.cache, q.String(), msg)
+			if r.mapping {
+				ips, err := r.msgToIP(msg)
+				if err != nil {
+					log.Debugln("[DNS] msg to ip error: %s", err.Error())
+					return
+				}
+				for _, ip := range ips {
+					putMsgToCache(r.cache, ip.String(), msg)
+				}
+			}
+		}
+	}()
+
+	isIPReq := isIPRequest(q)
+	if isIPReq {
+		msg, err = r.resolveIP(m)
+		return
+	}
+
+	msg, err = r.exchange(r.main, m)
+	return
+}
+
+func (r *Resolver) exchange(servers []*nameserver, m *D.Msg) (msg *D.Msg, err error) {
+	in := make(chan interface{})
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	fast := picker.SelectFast(ctx, in)
+
+	wg := sync.WaitGroup{}
+	wg.Add(len(servers))
+	for _, server := range servers {
+		go func(s *nameserver) {
+			defer wg.Done()
+			msg, _, err := s.Client.Exchange(m, s.Address)
+			if err != nil || msg.Rcode != D.RcodeSuccess {
+				return
+			}
+			in <- &result{Msg: msg, Error: err}
+		}(server)
+	}
+
+	// release in channel
+	go func() {
+		wg.Wait()
+		close(in)
+	}()
+
+	elm, exist := <-fast
+	if !exist {
+		return nil, errors.New("All DNS requests failed")
+	}
+
+	resp := elm.(*result)
+	msg, err = resp.Msg, resp.Error
+	return
+}
+
+func (r *Resolver) resolveIP(m *D.Msg) (msg *D.Msg, err error) {
+	msgCh := r.resolve(r.main, m)
+	if r.fallback == nil {
+		res := <-msgCh
+		msg, err = res.Msg, res.Error
+		return
+	}
+	fallbackMsg := r.resolve(r.fallback, m)
+	res := <-msgCh
+	if res.Error == nil {
+		if mmdb == nil {
+			return nil, errors.New("GeoIP can't use")
+		}
+
+		ips, _ := r.msgToIP(res.Msg)
+		if record, _ := mmdb.Country(ips[0]); record.Country.IsoCode == "CN" || record.Country.IsoCode == "" {
+			// release channel
+			go func() { <-fallbackMsg }()
+			msg = res.Msg
+			return
+		}
+	}
+
+	res = <-fallbackMsg
+	msg, err = res.Msg, res.Error
+	return
+}
+
+func (r *Resolver) ResolveIP(host string) (ip net.IP, err error) {
+	query := &D.Msg{}
+	dnsType := D.TypeA
+	if r.ipv6 {
+		dnsType = D.TypeAAAA
+	}
+	query.SetQuestion(D.Fqdn(host), dnsType)
+
+	msg, err := r.Exchange(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var ips []net.IP
+	ips, err = r.msgToIP(msg)
+	if err != nil {
+		return nil, err
+	}
+
+	ip = ips[0]
+	return
+}
+
+func (r *Resolver) msgToIP(msg *D.Msg) ([]net.IP, error) {
+	var ips []net.IP
+
+	for _, answer := range msg.Answer {
+		if r.ipv6 {
+			ans, ok := answer.(*D.AAAA)
+			if !ok {
+				continue
+			}
+			ips = append(ips, ans.AAAA)
+			continue
+		}
+
+		ans, ok := answer.(*D.A)
+		if !ok {
+			continue
+		}
+		ips = append(ips, ans.A)
+	}
+
+	if len(ips) == 0 {
+		return nil, errors.New("Can't parse msg")
+	}
+
+	return ips, nil
+}
+
+func (r *Resolver) IPToHost(ip net.IP) (string, bool) {
+	cache := r.cache.Get(ip.String())
+	if cache == nil {
+		return "", false
+	}
+	fqdn := cache.(*D.Msg).Question[0].Name
+	return strings.TrimRight(fqdn, "."), true
+}
+
+func (r *Resolver) resolve(client []*nameserver, msg *D.Msg) <-chan *result {
+	ch := make(chan *result)
+	go func() {
+		res, err := r.exchange(client, msg)
+		ch <- &result{Msg: res, Error: err}
+	}()
+	return ch
+}
+
+type NameServer struct {
+	Net  string
+	Addr string
+}
+
+type nameserver struct {
+	Client  *D.Client
+	Address string
+}
+
+type Config struct {
+	Main, Fallback []NameServer
+	IPv6           bool
+	EnhancedMode   EnhancedMode
+}
+
+func transform(servers []NameServer) []*nameserver {
+	var ret []*nameserver
+	for _, s := range servers {
+		ret = append(ret, &nameserver{
+			Client: &D.Client{
+				Net: s.Net,
+				TLSConfig: &tls.Config{
+					ClientSessionCache: globalSessionCache,
+				},
+			},
+			Address: s.Addr,
+		})
+	}
+	return ret
+}
+
+func New(config Config) *Resolver {
+	once.Do(func() {
+		mmdb, _ = geoip2.Open(C.Path.MMDB())
+	})
+
+	println(config.EnhancedMode)
+
+	r := &Resolver{
+		main:    transform(config.Main),
+		ipv6:    config.IPv6,
+		cache:   cache.New(time.Second * 60),
+		mapping: config.EnhancedMode == MAPPING,
+	}
+	if config.Fallback != nil {
+		r.fallback = transform(config.Fallback)
+	}
+	return r
+}

dns/server.go

@@ -0,0 +1,62 @@
+package dns
+
+import (
+	"net"
+
+	D "github.com/miekg/dns"
+)
+
+var (
+	address string
+	server  = &Server{}
+)
+
+type Server struct {
+	*D.Server
+	r *Resolver
+}
+
+func (s *Server) ServeDNS(w D.ResponseWriter, r *D.Msg) {
+	msg, err := s.r.Exchange(r)
+
+	if err != nil {
+		D.HandleFailed(w, r)
+		return
+	}
+	msg.SetReply(r)
+	w.WriteMsg(msg)
+}
+
+func ReCreateServer(addr string, resolver *Resolver) error {
+	if server.Server != nil {
+		server.Shutdown()
+	}
+
+	if addr == address {
+		return nil
+	}
+
+	_, port, err := net.SplitHostPort(addr)
+	if port == "0" || port == "" || err != nil {
+		return nil
+	}
+
+	udpAddr, err := net.ResolveUDPAddr("udp", addr)
+	if err != nil {
+		return err
+	}
+
+	p, err := net.ListenUDP("udp", udpAddr)
+	if err != nil {
+		return err
+	}
+
+	address = addr
+	server = &Server{r: resolver}
+	server.Server = &D.Server{Addr: addr, PacketConn: p, Handler: server}
+
+	go func() {
+		server.ActivateAndServe()
+	}()
+	return nil
+}

dns/util.go

@@ -0,0 +1,89 @@
+package dns
+
+import (
+	"encoding/json"
+	"errors"
+	"time"
+
+	"github.com/Dreamacro/clash/common/cache"
+	"github.com/Dreamacro/clash/log"
+	yaml "gopkg.in/yaml.v2"
+
+	D "github.com/miekg/dns"
+)
+
+var (
+	// EnhancedModeMapping is a mapping for EnhancedMode enum
+	EnhancedModeMapping = map[string]EnhancedMode{
+		NORMAL.String():  NORMAL,
+		FAKEIP.String():  FAKEIP,
+		MAPPING.String(): MAPPING,
+	}
+)
+
+const (
+	NORMAL EnhancedMode = iota
+	FAKEIP
+	MAPPING
+)
+
+type EnhancedMode int
+
+// UnmarshalYAML unserialize EnhancedMode with yaml
+func (e *EnhancedMode) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var tp string
+	if err := unmarshal(&tp); err != nil {
+		return err
+	}
+	mode, exist := EnhancedModeMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*e = mode
+	return nil
+}
+
+// MarshalYAML serialize EnhancedMode with yaml
+func (e EnhancedMode) MarshalYAML() ([]byte, error) {
+	return yaml.Marshal(e.String())
+}
+
+// UnmarshalJSON unserialize EnhancedMode with json
+func (e *EnhancedMode) UnmarshalJSON(data []byte) error {
+	var tp string
+	json.Unmarshal(data, &tp)
+	mode, exist := EnhancedModeMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*e = mode
+	return nil
+}
+
+// MarshalJSON serialize EnhancedMode with json
+func (e EnhancedMode) MarshalJSON() ([]byte, error) {
+	return json.Marshal(e.String())
+}
+
+func (e EnhancedMode) String() string {
+	switch e {
+	case NORMAL:
+		return "normal"
+	case FAKEIP:
+		return "fakeip"
+	case MAPPING:
+		return "redir-host"
+	default:
+		return "unknown"
+	}
+}
+
+func putMsgToCache(c *cache.Cache, key string, msg *D.Msg) {
+	if len(msg.Answer) == 0 {
+		log.Debugln("[DNS] answer length is zero: %#v", msg)
+		return
+	}
+
+	ttl := time.Duration(msg.Answer[0].Header().Ttl) * time.Second
+	c.Put(key, msg, ttl)
+}

go.mod

@@ -1,17 +1,20 @@
 module github.com/Dreamacro/clash
 
 require (
-	github.com/Dreamacro/go-shadowsocks2 v0.1.2-0.20181019110427-0a03f1a25270
+	github.com/Dreamacro/go-shadowsocks2 v0.1.2
 	github.com/eapache/queue v1.1.0 // indirect
 	github.com/go-chi/chi v3.3.3+incompatible
 	github.com/go-chi/cors v1.0.0
 	github.com/go-chi/render v1.0.1
 	github.com/gofrs/uuid v3.1.0+incompatible
 	github.com/gorilla/websocket v1.4.0
+	github.com/miekg/dns v1.1.0
 	github.com/oschwald/geoip2-golang v1.2.1
 	github.com/oschwald/maxminddb-golang v1.3.0 // indirect
-	github.com/sirupsen/logrus v1.1.0
+	github.com/sirupsen/logrus v1.2.0
-	golang.org/x/crypto v0.0.0-20181009213950-7c1a557ab941
+	golang.org/x/crypto v0.0.0-20181127143415-eb0de9b17e85
+	golang.org/x/net v0.0.0-20181108082009-03003ca0c849 // indirect
+	golang.org/x/sync v0.0.0-20181108010431-42b317875d0f // indirect
 	gopkg.in/eapache/channels.v1 v1.1.0
-	gopkg.in/yaml.v2 v2.2.1
+	gopkg.in/yaml.v2 v2.2.2
 )

go.sum

@@ -1,5 +1,5 @@
-github.com/Dreamacro/go-shadowsocks2 v0.1.2-0.20181019110427-0a03f1a25270 h1:ugkI+Yw5ArFnhF8KTbJxyWIyvxMCa8jWyUF+wIAulhM=
+github.com/Dreamacro/go-shadowsocks2 v0.1.2 h1:8KgWbwAw5PJF+i6F3tI2iW/Em9WDtAuDG4obot8bGLM=
-github.com/Dreamacro/go-shadowsocks2 v0.1.2-0.20181019110427-0a03f1a25270/go.mod h1:DlkXRxmh5K+99aTPQaVjsZ1fAZNFw42vXGcOjR3Otps=
+github.com/Dreamacro/go-shadowsocks2 v0.1.2/go.mod h1:J5YbNUiKtaD7EJmQ4O9ruUTY9+IgrflPgm63K1nUE0I=
 github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da h1:KjTM2ks9d14ZYCvmHS9iAKVt9AyzRSqNU1qabPih5BY=
 github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da/go.mod h1:eHEWzANqSiWQsof+nXEI9bUVUyV6F53Fp89EuCh2EAA=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -16,22 +16,28 @@ github.com/gofrs/uuid v3.1.0+incompatible h1:q2rtkjaKT4YEr6E1kamy0Ha4RtepWlQBedy
 github.com/gofrs/uuid v3.1.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
 github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
-github.com/konsorten/go-windows-terminal-sequences v0.0.0-20180402223658-b729f2633dfe h1:CHRGQ8V7OlCYtwaKPJi3iA7J+YdNKdo8j7nG5IgDhjs=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
-github.com/konsorten/go-windows-terminal-sequences v0.0.0-20180402223658-b729f2633dfe/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/miekg/dns v1.1.0 h1:yv9O9RJbvVFkvW8PKYqp4x7HQkc5RWwmUY/L8MdUaIg=
+github.com/miekg/dns v1.1.0/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
 github.com/oschwald/geoip2-golang v1.2.1 h1:3iz+jmeJc6fuCyWeKgtXSXu7+zvkxJbHFXkMT5FVebU=
 github.com/oschwald/geoip2-golang v1.2.1/go.mod h1:0LTTzix/Ao1uMvOhAV4iLU0Lz7eCrP94qZWBTDKf0iE=
 github.com/oschwald/maxminddb-golang v1.3.0 h1:oTh8IBSj10S5JNlUDg5WjJ1QdBMdeaZIkPEVfESSWgE=
 github.com/oschwald/maxminddb-golang v1.3.0/go.mod h1:3jhIUymTJ5VREKyIhWm66LJiQt04F0UCDdodShpjWsY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/sirupsen/logrus v1.1.0 h1:65VZabgUiV9ktjGM5nTq0+YurgTyX+YI2lSSfDjI+qU=
+github.com/sirupsen/logrus v1.2.0 h1:juTguoYk5qI21pwyTXY3B3Y5cOTH3ZUyZCg1v/mihuo=
-github.com/sirupsen/logrus v1.1.0/go.mod h1:zrgwTnHtNr00buQ1vSptGe8m1f/BbgsPukg8qsT7A+A=
+github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20181009213950-7c1a557ab941 h1:qBTHLajHecfu+xzRI9PqVDcqx7SdHj9d4B+EzSn3tAc=
+golang.org/x/crypto v0.0.0-20181127143415-eb0de9b17e85 h1:et7+NAX3lLIk5qUCTA9QelBjGE/NkhzYw/mhnr0s7nI=
-golang.org/x/crypto v0.0.0-20181009213950-7c1a557ab941/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20181127143415-eb0de9b17e85/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33 h1:I6FyU15t786LL7oL/hn43zqTuEGr4PN7F4XJ1p4E3Y8=
+golang.org/x/net v0.0.0-20181108082009-03003ca0c849 h1:FSqE2GGG7wzsYUsWiQ8MZrvEd1EOyU3NCF0AW3Wtltg=
+golang.org/x/net v0.0.0-20181108082009-03003ca0c849/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20181108010431-42b317875d0f h1:Bl/8QSvNqXvPGPGXa2z5xUTmV7VDcZyvRZ+QQXkXTZQ=
+golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181005133103-4497e2df6f9e h1:EfdBzeKbFSvOjoIqSZcfS8wp0FBLokGBEs9lz1OtSg0=
 golang.org/x/sys v0.0.0-20181005133103-4497e2df6f9e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -39,5 +45,5 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/eapache/channels.v1 v1.1.0 h1:5bGAyKKvyCTWjSj7mhefG6Lc68VyN4MH1v8/7OoeeB4=
 gopkg.in/eapache/channels.v1 v1.1.0/go.mod h1:BHIBujSvu9yMTrTYbTCjDD43gUhtmaOtTWDe7sTv1js=
-gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

hub/common.go

@@ -1,33 +0,0 @@
-package hub
-
-import (
-	"github.com/Dreamacro/clash/config"
-	"github.com/Dreamacro/clash/proxy"
-	T "github.com/Dreamacro/clash/tunnel"
-)
-
-var (
-	tunnel   = T.Instance()
-	cfg      = config.Instance()
-	listener = proxy.Instance()
-)
-
-type Error struct {
-	Error string `json:"error"`
-}
-
-type Errors struct {
-	Errors map[string]string `json:"errors"`
-}
-
-func formatErrors(errorsMap map[string]error) (bool, Errors) {
-	errors := make(map[string]string)
-	hasError := false
-	for key, err := range errorsMap {
-		if err != nil {
-			errors[key] = err.Error()
-			hasError = true
-		}
-	}
-	return hasError, Errors{Errors: errors}
-}

hub/configs.go

@@ -1,96 +0,0 @@
-package hub
-
-import (
-	"fmt"
-	"net/http"
-
-	"github.com/Dreamacro/clash/config"
-	C "github.com/Dreamacro/clash/constant"
-
-	"github.com/go-chi/chi"
-	"github.com/go-chi/render"
-)
-
-func configRouter() http.Handler {
-	r := chi.NewRouter()
-	r.Get("/", getConfigs)
-	r.Put("/", updateConfigs)
-	return r
-}
-
-type configSchema struct {
-	Port      int    `json:"port"`
-	SocksPort int    `json:"socket-port"`
-	RedirPort int    `json:"redir-port"`
-	AllowLan  bool   `json:"allow-lan"`
-	Mode      string `json:"mode"`
-	LogLevel  string `json:"log-level"`
-}
-
-func getConfigs(w http.ResponseWriter, r *http.Request) {
-	general := cfg.General()
-	render.JSON(w, r, configSchema{
-		Port:      general.Port,
-		SocksPort: general.SocksPort,
-		RedirPort: general.RedirPort,
-		AllowLan:  general.AllowLan,
-		Mode:      general.Mode.String(),
-		LogLevel:  general.LogLevel.String(),
-	})
-}
-
-func updateConfigs(w http.ResponseWriter, r *http.Request) {
-	general := &C.General{}
-	err := render.DecodeJSON(r.Body, general)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, Error{
-			Error: "Format error",
-		})
-		return
-	}
-
-	// update errors
-	var modeErr, logLevelErr error
-
-	// update mode
-	if general.Mode != nil {
-		mode, ok := config.ModeMapping[*general.Mode]
-		if !ok {
-			modeErr = fmt.Errorf("Mode error")
-		} else {
-			cfg.SetMode(mode)
-		}
-	}
-
-	// update log-level
-	if general.LogLevel != nil {
-		level, ok := C.LogLevelMapping[*general.LogLevel]
-		if !ok {
-			logLevelErr = fmt.Errorf("Log Level error")
-		} else {
-			cfg.SetLogLevel(level)
-		}
-	}
-
-	hasError, errors := formatErrors(map[string]error{
-		"mode":      modeErr,
-		"log-level": logLevelErr,
-	})
-
-	if hasError {
-		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, errors)
-		return
-	}
-
-	// update proxy
-	cfg.UpdateProxy(config.ProxyConfig{
-		AllowLan:  general.AllowLan,
-		Port:      general.Port,
-		SocksPort: general.SocksPort,
-		RedirPort: general.RedirPort,
-	})
-
-	w.WriteHeader(http.StatusNoContent)
-}

hub/executor/executor.go

@@ -0,0 +1,101 @@
+package executor
+
+import (
+	adapters "github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/config"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/dns"
+	"github.com/Dreamacro/clash/log"
+	P "github.com/Dreamacro/clash/proxy"
+	T "github.com/Dreamacro/clash/tunnel"
+)
+
+// Parse config with default config path
+func Parse() (*config.Config, error) {
+	return ParseWithPath(C.Path.Config())
+}
+
+// ParseWithPath parse config with custom config path
+func ParseWithPath(path string) (*config.Config, error) {
+	return config.Parse(path)
+}
+
+// ApplyConfig dispatch configure to all parts
+func ApplyConfig(cfg *config.Config, force bool) {
+	if force {
+		updateGeneral(cfg.General)
+	}
+	updateProxies(cfg.Proxies)
+	updateRules(cfg.Rules)
+	updateGeneral(cfg.General)
+	updateDNS(cfg.DNS)
+}
+
+func GetGeneral() *config.General {
+	ports := P.GetPorts()
+	return &config.General{
+		Port:      ports.Port,
+		SocksPort: ports.SocksPort,
+		RedirPort: ports.RedirPort,
+		AllowLan:  P.AllowLan(),
+		Mode:      T.Instance().Mode(),
+		LogLevel:  log.Level(),
+	}
+}
+
+func updateDNS(c *config.DNS) {
+	if c.Enable == false {
+		T.Instance().SetResolver(nil)
+		dns.ReCreateServer("", nil)
+		return
+	}
+	r := dns.New(dns.Config{
+		Main:         c.NameServer,
+		Fallback:     c.Fallback,
+		IPv6:         c.IPv6,
+		EnhancedMode: c.EnhancedMode,
+	})
+	T.Instance().SetResolver(r)
+	dns.ReCreateServer(c.Listen, r)
+}
+
+func updateProxies(proxies map[string]C.Proxy) {
+	tunnel := T.Instance()
+	oldProxies := tunnel.Proxies()
+
+	// close old goroutine
+	for _, proxy := range oldProxies {
+		switch raw := proxy.(type) {
+		case *adapters.URLTest:
+			raw.Close()
+		case *adapters.Fallback:
+			raw.Close()
+		}
+	}
+
+	tunnel.UpdateProxies(proxies)
+}
+
+func updateRules(rules []C.Rule) {
+	T.Instance().UpdateRules(rules)
+}
+
+func updateGeneral(general *config.General) {
+	log.SetLevel(general.LogLevel)
+	T.Instance().SetMode(general.Mode)
+
+	allowLan := general.AllowLan
+
+	P.SetAllowLan(allowLan)
+	if err := P.ReCreateHTTP(general.Port); err != nil {
+		log.Errorln("Start HTTP server error: %s", err.Error())
+	}
+
+	if err := P.ReCreateSocks(general.SocksPort); err != nil {
+		log.Errorln("Start SOCKS5 server error: %s", err.Error())
+	}
+
+	if err := P.ReCreateRedir(general.RedirPort); err != nil {
+		log.Errorln("Start Redir server error: %s", err.Error())
+	}
+}

hub/hub.go

@@ -0,0 +1,21 @@
+package hub
+
+import (
+	"github.com/Dreamacro/clash/hub/executor"
+	"github.com/Dreamacro/clash/hub/route"
+)
+
+// Parse call at the beginning of clash
+func Parse() error {
+	cfg, err := executor.Parse()
+	if err != nil {
+		return err
+	}
+
+	if cfg.General.ExternalController != "" {
+		go route.Start(cfg.General.ExternalController, cfg.General.Secret)
+	}
+
+	executor.ApplyConfig(cfg, true)
+	return nil
+}

hub/proxies.go

@@ -1,217 +0,0 @@
-package hub
-
-import (
-	"context"
-	"fmt"
-	"net/http"
-	"net/url"
-	"strconv"
-	"time"
-
-	A "github.com/Dreamacro/clash/adapters/outbound"
-	C "github.com/Dreamacro/clash/constant"
-
-	"github.com/go-chi/chi"
-	"github.com/go-chi/render"
-)
-
-func proxyRouter() http.Handler {
-	r := chi.NewRouter()
-	r.Get("/", getProxies)
-	r.With(parseProxyName).Get("/{name}", getProxy)
-	r.With(parseProxyName).Get("/{name}/delay", getProxyDelay)
-	r.With(parseProxyName).Put("/{name}", updateProxy)
-	return r
-}
-
-// When name is composed of a partial escape string, Golang does not unescape it
-func parseProxyName(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		name := chi.URLParam(r, "name")
-		if newName, err := url.PathUnescape(name); err == nil {
-			name = newName
-		}
-		ctx := context.WithValue(r.Context(), contextKey("proxy name"), name)
-		next.ServeHTTP(w, r.WithContext(ctx))
-	})
-}
-
-type SampleProxy struct {
-	Type string `json:"type"`
-}
-
-type Selector struct {
-	Type string   `json:"type"`
-	Now  string   `json:"now"`
-	All  []string `json:"all"`
-}
-
-type URLTest struct {
-	Type string `json:"type"`
-	Now  string `json:"now"`
-}
-
-type Fallback struct {
-	Type string `json:"type"`
-	Now  string `json:"now"`
-}
-
-func transformProxy(proxy C.Proxy) interface{} {
-	t := proxy.Type()
-	switch t {
-	case C.Selector:
-		selector := proxy.(*A.Selector)
-		return Selector{
-			Type: t.String(),
-			Now:  selector.Now(),
-			All:  selector.All(),
-		}
-	case C.URLTest:
-		return URLTest{
-			Type: t.String(),
-			Now:  proxy.(*A.URLTest).Now(),
-		}
-	case C.Fallback:
-		return Fallback{
-			Type: t.String(),
-			Now:  proxy.(*A.Fallback).Now(),
-		}
-	default:
-		return SampleProxy{
-			Type: proxy.Type().String(),
-		}
-	}
-}
-
-type GetProxiesResponse struct {
-	Proxies map[string]interface{} `json:"proxies"`
-}
-
-func getProxies(w http.ResponseWriter, r *http.Request) {
-	rawProxies := cfg.Proxies()
-	proxies := make(map[string]interface{})
-	for name, proxy := range rawProxies {
-		proxies[name] = transformProxy(proxy)
-	}
-	render.JSON(w, r, GetProxiesResponse{Proxies: proxies})
-}
-
-func getProxy(w http.ResponseWriter, r *http.Request) {
-	name := r.Context().Value(contextKey("proxy name")).(string)
-	proxies := cfg.Proxies()
-	proxy, exist := proxies[name]
-	if !exist {
-		w.WriteHeader(http.StatusNotFound)
-		render.JSON(w, r, Error{
-			Error: "Proxy not found",
-		})
-		return
-	}
-	render.JSON(w, r, transformProxy(proxy))
-}
-
-type UpdateProxyRequest struct {
-	Name string `json:"name"`
-}
-
-func updateProxy(w http.ResponseWriter, r *http.Request) {
-	req := UpdateProxyRequest{}
-	if err := render.DecodeJSON(r.Body, &req); err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, Error{
-			Error: "Format error",
-		})
-		return
-	}
-
-	name := r.Context().Value(contextKey("proxy name")).(string)
-	proxies := cfg.Proxies()
-	proxy, exist := proxies[name]
-	if !exist {
-		w.WriteHeader(http.StatusNotFound)
-		render.JSON(w, r, Error{
-			Error: "Proxy not found",
-		})
-		return
-	}
-
-	selector, ok := proxy.(*A.Selector)
-	if !ok {
-		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, Error{
-			Error: "Proxy can't update",
-		})
-		return
-	}
-
-	if err := selector.Set(req.Name); err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, Error{
-			Error: fmt.Sprintf("Selector update error: %s", err.Error()),
-		})
-		return
-	}
-
-	w.WriteHeader(http.StatusNoContent)
-}
-
-type GetProxyDelayRequest struct {
-	URL     string `json:"url"`
-	Timeout int16  `json:"timeout"`
-}
-
-type GetProxyDelayResponse struct {
-	Delay int16 `json:"delay"`
-}
-
-func getProxyDelay(w http.ResponseWriter, r *http.Request) {
-	query := r.URL.Query()
-	url := query.Get("url")
-	timeout, err := strconv.ParseInt(query.Get("timeout"), 10, 16)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, Error{
-			Error: "Format error",
-		})
-		return
-	}
-
-	name := r.Context().Value(contextKey("proxy name")).(string)
-	proxies := cfg.Proxies()
-	proxy, exist := proxies[name]
-	if !exist {
-		w.WriteHeader(http.StatusNotFound)
-		render.JSON(w, r, Error{
-			Error: "Proxy not found",
-		})
-		return
-	}
-
-	sigCh := make(chan int16)
-	go func() {
-		t, err := A.DelayTest(proxy, url)
-		if err != nil {
-			sigCh <- 0
-		}
-		sigCh <- t
-	}()
-
-	select {
-	case <-time.After(time.Millisecond * time.Duration(timeout)):
-		w.WriteHeader(http.StatusRequestTimeout)
-		render.JSON(w, r, Error{
-			Error: "Proxy delay test timeout",
-		})
-	case t := <-sigCh:
-		if t == 0 {
-			w.WriteHeader(http.StatusServiceUnavailable)
-			render.JSON(w, r, Error{
-				Error: "An error occurred in the delay test",
-			})
-		} else {
-			render.JSON(w, r, GetProxyDelayResponse{
-				Delay: t,
-			})
-		}
-	}
-}

hub/route/configs.go

@@ -0,0 +1,102 @@
+package route
+
+import (
+	"net/http"
+	"path/filepath"
+
+	"github.com/Dreamacro/clash/hub/executor"
+	"github.com/Dreamacro/clash/log"
+	P "github.com/Dreamacro/clash/proxy"
+	T "github.com/Dreamacro/clash/tunnel"
+
+	"github.com/go-chi/chi"
+	"github.com/go-chi/render"
+)
+
+func configRouter() http.Handler {
+	r := chi.NewRouter()
+	r.Get("/", getConfigs)
+	r.Put("/", updateConfigs)
+	r.Patch("/", patchConfigs)
+	return r
+}
+
+type configSchema struct {
+	Port      *int          `json:"port"`
+	SocksPort *int          `json:"socket-port"`
+	RedirPort *int          `json:"redir-port"`
+	AllowLan  *bool         `json:"allow-lan"`
+	Mode      *T.Mode       `json:"mode"`
+	LogLevel  *log.LogLevel `json:"log-level"`
+}
+
+func getConfigs(w http.ResponseWriter, r *http.Request) {
+	general := executor.GetGeneral()
+	render.Respond(w, r, general)
+}
+
+func pointerOrDefault(p *int, def int) int {
+	if p != nil {
+		return *p
+	}
+
+	return def
+}
+
+func patchConfigs(w http.ResponseWriter, r *http.Request) {
+	general := &configSchema{}
+	if err := render.DecodeJSON(r.Body, general); err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, ErrBadRequest)
+		return
+	}
+
+	if general.AllowLan != nil {
+		P.SetAllowLan(*general.AllowLan)
+	}
+
+	ports := P.GetPorts()
+	P.ReCreateHTTP(pointerOrDefault(general.Port, ports.Port))
+	P.ReCreateSocks(pointerOrDefault(general.SocksPort, ports.SocksPort))
+	P.ReCreateRedir(pointerOrDefault(general.RedirPort, ports.RedirPort))
+
+	if general.Mode != nil {
+		T.Instance().SetMode(*general.Mode)
+	}
+
+	if general.LogLevel != nil {
+		log.SetLevel(*general.LogLevel)
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+type updateConfigRequest struct {
+	Path string `json:"path"`
+}
+
+func updateConfigs(w http.ResponseWriter, r *http.Request) {
+	req := updateConfigRequest{}
+	if err := render.DecodeJSON(r.Body, &req); err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, ErrBadRequest)
+		return
+	}
+
+	if !filepath.IsAbs(req.Path) {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, newError("path is not a absoluted path"))
+		return
+	}
+
+	force := r.URL.Query().Get("force") == "true"
+	cfg, err := executor.ParseWithPath(req.Path)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, newError(err.Error()))
+		return
+	}
+
+	executor.ApplyConfig(cfg, force)
+	w.WriteHeader(http.StatusNoContent)
+}

hub/route/ctxkeys.go

@@ -0,0 +1,12 @@
+package route
+
+var (
+	CtxKeyProxyName = contextKey("proxy name")
+	CtxKeyProxy     = contextKey("proxy")
+)
+
+type contextKey string
+
+func (c contextKey) String() string {
+	return "clash context key " + string(c)
+}

hub/route/errors.go

@@ -0,0 +1,22 @@
+package route
+
+var (
+	ErrUnauthorized   = newError("Unauthorized")
+	ErrBadRequest     = newError("Body invalid")
+	ErrForbidden      = newError("Forbidden")
+	ErrNotFound       = newError("Resource not found")
+	ErrRequestTimeout = newError("Timeout")
+)
+
+// HTTPError is custom HTTP error for API
+type HTTPError struct {
+	Message string `json:"message"`
+}
+
+func (e *HTTPError) Error() string {
+	return e.Message
+}
+
+func newError(msg string) *HTTPError {
+	return &HTTPError{Message: msg}
+}

hub/route/proxies.go

@@ -0,0 +1,137 @@
+package route
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+
+	A "github.com/Dreamacro/clash/adapters/outbound"
+	C "github.com/Dreamacro/clash/constant"
+	T "github.com/Dreamacro/clash/tunnel"
+
+	"github.com/go-chi/chi"
+	"github.com/go-chi/render"
+)
+
+func proxyRouter() http.Handler {
+	r := chi.NewRouter()
+	r.Get("/", getProxies)
+
+	r.Route("/{name}", func(r chi.Router) {
+		r.Use(parseProxyName, findProxyByName)
+		r.Get("/", getProxy)
+		r.Get("/delay", getProxyDelay)
+		r.Put("/", updateProxy)
+	})
+	return r
+}
+
+// When name is composed of a partial escape string, Golang does not unescape it
+func parseProxyName(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		name := chi.URLParam(r, "name")
+		if newName, err := url.PathUnescape(name); err == nil {
+			name = newName
+		}
+		ctx := context.WithValue(r.Context(), CtxKeyProxyName, name)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func findProxyByName(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		name := r.Context().Value(CtxKeyProxyName).(string)
+		proxies := T.Instance().Proxies()
+		proxy, exist := proxies[name]
+		if !exist {
+			w.WriteHeader(http.StatusNotFound)
+			render.Respond(w, r, ErrNotFound)
+			return
+		}
+
+		ctx := context.WithValue(r.Context(), CtxKeyProxy, proxy)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func getProxies(w http.ResponseWriter, r *http.Request) {
+	proxies := T.Instance().Proxies()
+	render.Respond(w, r, map[string]map[string]C.Proxy{
+		"proxies": proxies,
+	})
+}
+
+func getProxy(w http.ResponseWriter, r *http.Request) {
+	proxy := r.Context().Value(CtxKeyProxy).(C.Proxy)
+	render.Respond(w, r, proxy)
+}
+
+type UpdateProxyRequest struct {
+	Name string `json:"name"`
+}
+
+func updateProxy(w http.ResponseWriter, r *http.Request) {
+	req := UpdateProxyRequest{}
+	if err := render.DecodeJSON(r.Body, &req); err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, ErrBadRequest)
+		return
+	}
+
+	proxy := r.Context().Value(CtxKeyProxy).(C.Proxy)
+
+	selector, ok := proxy.(*A.Selector)
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, ErrBadRequest)
+		return
+	}
+
+	if err := selector.Set(req.Name); err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, newError(fmt.Sprintf("Selector update error: %s", err.Error())))
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+func getProxyDelay(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+	url := query.Get("url")
+	timeout, err := strconv.ParseInt(query.Get("timeout"), 10, 16)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		render.Respond(w, r, ErrBadRequest)
+		return
+	}
+
+	proxy := r.Context().Value(CtxKeyProxy).(C.Proxy)
+
+	sigCh := make(chan int16)
+	go func() {
+		t, err := A.DelayTest(proxy, url)
+		if err != nil {
+			sigCh <- 0
+		}
+		sigCh <- t
+	}()
+
+	select {
+	case <-time.After(time.Millisecond * time.Duration(timeout)):
+		w.WriteHeader(http.StatusRequestTimeout)
+		render.Respond(w, r, ErrRequestTimeout)
+	case t := <-sigCh:
+		if t == 0 {
+			w.WriteHeader(http.StatusServiceUnavailable)
+			render.Respond(w, r, newError("An error occurred in the delay test"))
+		} else {
+			render.Respond(w, r, map[string]int16{
+				"delay": t,
+			})
+		}
+	}
+}

hub/route/rules.go

@@ -1,8 +1,10 @@
-package hub
+package route
 
 import (
 	"net/http"
 
+	T "github.com/Dreamacro/clash/tunnel"
+
 	"github.com/go-chi/chi"
 	"github.com/go-chi/render"
 )
@@ -10,7 +12,6 @@ import (
 func ruleRouter() http.Handler {
 	r := chi.NewRouter()
 	r.Get("/", getRules)
-	r.Put("/", updateRules)
 	return r
 }
 
@@ -20,12 +21,8 @@ type Rule struct {
 	Proxy   string `json:"proxy"`
 }
 
-type GetRulesResponse struct {
-	Rules []Rule `json:"rules"`
-}
-
 func getRules(w http.ResponseWriter, r *http.Request) {
-	rawRules := cfg.Rules()
+	rawRules := T.Instance().Rules()
 
 	var rules []Rule
 	for _, rule := range rawRules {
@@ -37,19 +34,7 @@ func getRules(w http.ResponseWriter, r *http.Request) {
 	}
 
 	w.WriteHeader(http.StatusOK)
-	render.JSON(w, r, GetRulesResponse{
+	render.Respond(w, r, map[string][]Rule{
-		Rules: rules,
+		"rules": rules,
 	})
 }
-
-func updateRules(w http.ResponseWriter, r *http.Request) {
-	err := cfg.UpdateRules()
-	if err != nil {
-		w.WriteHeader(http.StatusInternalServerError)
-		render.JSON(w, r, Error{
-			Error: err.Error(),
-		})
-		return
-	}
-	w.WriteHeader(http.StatusNoContent)
-}

hub/route/server.go

@@ -1,4 +1,4 @@
-package hub
+package route
 
 import (
 	"encoding/json"
@@ -6,44 +6,32 @@ import (
 	"strings"
 	"time"
 
-	"github.com/Dreamacro/clash/config"
+	"github.com/Dreamacro/clash/log"
-	C "github.com/Dreamacro/clash/constant"
 	T "github.com/Dreamacro/clash/tunnel"
 
 	"github.com/go-chi/chi"
 	"github.com/go-chi/cors"
 	"github.com/go-chi/render"
-	log "github.com/sirupsen/logrus"
 )
 
-var secret = ""
+var (
+	serverSecret = ""
+	serverAddr   = ""
+)
 
 type Traffic struct {
 	Up   int64 `json:"up"`
 	Down int64 `json:"down"`
 }
 
-func newHub(signal chan struct{}) {
+func Start(addr string, secret string) {
-	var addr string
+	if serverAddr != "" {
-	ch := config.Instance().Subscribe()
+		return
-	signal <- struct{}{}
-	count := 0
-	for {
-		elm := <-ch
-		event := elm.(*config.Event)
-		switch event.Type {
-		case "external-controller":
-			addr = event.Payload.(string)
-			count++
-		case "secret":
-			secret = event.Payload.(string)
-			count++
-		}
-		if count == 2 {
-			break
-		}
 	}
 
+	serverAddr = addr
+	serverSecret = secret
+
 	r := chi.NewRouter()
 
 	cors := cors.New(cors.Options{
@@ -61,10 +49,10 @@ func newHub(signal chan struct{}) {
 	r.Mount("/proxies", proxyRouter())
 	r.Mount("/rules", ruleRouter())
 
-	log.Infof("RESTful API listening at: %s", addr)
+	log.Infoln("RESTful API listening at: %s", addr)
 	err := http.ListenAndServe(addr, r)
 	if err != nil {
-		log.Errorf("External controller error: %s", err.Error())
+		log.Errorln("External controller error: %s", err.Error())
 	}
 }
 
@@ -81,18 +69,16 @@ func authentication(next http.Handler) http.Handler {
 		header := r.Header.Get("Authorization")
 		text := strings.SplitN(header, " ", 2)
 
-		if secret == "" {
+		if serverSecret == "" {
 			next.ServeHTTP(w, r)
 			return
 		}
 
 		hasUnvalidHeader := text[0] != "Bearer"
-		hasUnvalidSecret := len(text) == 2 && text[1] != secret
+		hasUnvalidSecret := len(text) == 2 && text[1] != serverSecret
 		if hasUnvalidHeader || hasUnvalidSecret {
 			w.WriteHeader(http.StatusUnauthorized)
-			render.JSON(w, r, Error{
+			render.Respond(w, r, ErrUnauthorized)
-				Error: "Authentication failed",
-			})
 			return
 		}
 		next.ServeHTTP(w, r)
@@ -100,17 +86,11 @@ func authentication(next http.Handler) http.Handler {
 	return http.HandlerFunc(fn)
 }
 
-type contextKey string
-
-func (c contextKey) String() string {
-	return "clash context key " + string(c)
-}
-
 func traffic(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 
 	tick := time.NewTicker(time.Second)
-	t := tunnel.Traffic()
+	t := T.Instance().Traffic()
 	for range tick.C {
 		up, down := t.Now()
 		if err := json.NewEncoder(w).Encode(Traffic{
@@ -134,29 +114,18 @@ func getLogs(w http.ResponseWriter, r *http.Request) {
 		levelText = "info"
 	}
 
-	level, ok := C.LogLevelMapping[levelText]
+	level, ok := log.LogLevelMapping[levelText]
 	if !ok {
 		w.WriteHeader(http.StatusBadRequest)
-		render.JSON(w, r, Error{
+		render.Respond(w, r, ErrBadRequest)
-			Error: "Level error",
-		})
 		return
 	}
 
-	src := tunnel.Log()
+	sub := log.Subscribe()
-	sub, err := src.Subscribe()
-	defer src.UnSubscribe(sub)
-	if err != nil {
-		w.WriteHeader(http.StatusInternalServerError)
-		render.JSON(w, r, Error{
-			Error: err.Error(),
-		})
-		return
-	}
 	render.Status(r, http.StatusOK)
 	for elm := range sub {
-		log := elm.(T.Log)
+		log := elm.(*log.Event)
-		if log.LogLevel > level {
+		if log.LogLevel < level {
 			continue
 		}
 
@@ -169,10 +138,3 @@ func getLogs(w http.ResponseWriter, r *http.Request) {
 		w.(http.Flusher).Flush()
 	}
 }
-
-// Run initial hub
-func Run() {
-	signal := make(chan struct{})
-	go newHub(signal)
-	<-signal
-}

log/level.go

@@ -0,0 +1,73 @@
+package log
+
+import (
+	"encoding/json"
+	"errors"
+)
+
+var (
+	// LogLevelMapping is a mapping for LogLevel enum
+	LogLevelMapping = map[string]LogLevel{
+		ERROR.String():   ERROR,
+		WARNING.String(): WARNING,
+		INFO.String():    INFO,
+		DEBUG.String():   DEBUG,
+		SILENT.String():  SILENT,
+	}
+)
+
+const (
+	DEBUG LogLevel = iota
+	INFO
+	WARNING
+	ERROR
+	SILENT
+)
+
+type LogLevel int
+
+// UnmarshalYAML unserialize LogLevel with yaml
+func (l *LogLevel) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var tp string
+	unmarshal(&tp)
+	level, exist := LogLevelMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*l = level
+	return nil
+}
+
+// UnmarshalJSON unserialize LogLevel with json
+func (l *LogLevel) UnmarshalJSON(data []byte) error {
+	var tp string
+	json.Unmarshal(data, &tp)
+	level, exist := LogLevelMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*l = level
+	return nil
+}
+
+// MarshalJSON serialize LogLevel with json
+func (l LogLevel) MarshalJSON() ([]byte, error) {
+	return json.Marshal(l.String())
+}
+
+func (l LogLevel) String() string {
+	switch l {
+	case INFO:
+		return "info"
+	case WARNING:
+		return "warning"
+	case ERROR:
+		return "error"
+	case DEBUG:
+		return "debug"
+	case SILENT:
+		return "silent"
+	default:
+		return "unknown"
+	}
+}

log/log.go

@@ -0,0 +1,93 @@
+package log
+
+import (
+	"fmt"
+
+	"github.com/Dreamacro/clash/common/observable"
+
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	logCh  = make(chan interface{})
+	source = observable.NewObservable(logCh)
+	level  = INFO
+)
+
+func init() {
+	log.SetLevel(log.DebugLevel)
+}
+
+type Event struct {
+	LogLevel LogLevel
+	Payload  string
+}
+
+func (e *Event) Type() string {
+	return e.LogLevel.String()
+}
+
+func Infoln(format string, v ...interface{}) {
+	event := newLog(INFO, format, v...)
+	logCh <- event
+	print(event)
+}
+
+func Warnln(format string, v ...interface{}) {
+	event := newLog(WARNING, format, v...)
+	logCh <- event
+	print(event)
+}
+
+func Errorln(format string, v ...interface{}) {
+	event := newLog(ERROR, format, v...)
+	logCh <- event
+	print(event)
+}
+
+func Debugln(format string, v ...interface{}) {
+	event := newLog(DEBUG, format, v...)
+	logCh <- event
+	print(event)
+}
+
+func Fatalln(format string, v ...interface{}) {
+	log.Fatalf(format, v...)
+}
+
+func Subscribe() observable.Subscription {
+	sub, _ := source.Subscribe()
+	return sub
+}
+
+func Level() LogLevel {
+	return level
+}
+
+func SetLevel(newLevel LogLevel) {
+	level = newLevel
+}
+
+func print(data *Event) {
+	if data.LogLevel < level {
+		return
+	}
+
+	switch data.LogLevel {
+	case INFO:
+		log.Infoln(data.Payload)
+	case WARNING:
+		log.Warnln(data.Payload)
+	case ERROR:
+		log.Errorln(data.Payload)
+	case DEBUG:
+		log.Debugln(data.Payload)
+	}
+}
+
+func newLog(logLevel LogLevel, format string, v ...interface{}) *Event {
+	return &Event{
+		LogLevel: logLevel,
+		Payload:  fmt.Sprintf(format, v...),
+	}
+}

main.go

@@ -1,17 +1,15 @@
 package main
 
 import (
+	"flag"
 	"os"
 	"os/signal"
+	"path/filepath"
 	"syscall"
-	"flag"
-	"path"
 
 	"github.com/Dreamacro/clash/config"
-	"github.com/Dreamacro/clash/hub"
-	"github.com/Dreamacro/clash/proxy"
-	"github.com/Dreamacro/clash/tunnel"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/hub"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -26,21 +24,19 @@ func init() {
 }
 
 func main() {
-	tunnel.Instance().Run()
+	if homedir != "" {
-	proxy.Instance().Run()
+		if !filepath.IsAbs(homedir) {
-	hub.Run()
-
-	if (homedir != "") {
-		if !path.IsAbs(homedir) {
 			currentDir, _ := os.Getwd()
-			homedir = path.Join(currentDir, homedir)
+			homedir = filepath.Join(currentDir, homedir)
 		}
 		C.SetHomeDir(homedir)
 	}
 
-	config.Init()
+	if err := config.Init(C.Path.HomeDir()); err != nil {
-	err := config.Instance().Parse()
+		log.Fatalf("Initial configuration directory error: %s", err.Error())
-	if err != nil {
+	}
+
+	if err := hub.Parse(); err != nil {
 		log.Fatalf("Parse config error: %s", err.Error())
 	}
 

proxy/http/server.go

@@ -6,35 +6,33 @@ import (
 	"net/http"
 
 	"github.com/Dreamacro/clash/adapters/inbound"
-	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/tunnel"
-
-	log "github.com/sirupsen/logrus"
 )
 
 var (
 	tun = tunnel.Instance()
 )
 
-func NewHttpProxy(addr string) (*C.ProxySignal, error) {
+type HttpListener struct {
+	net.Listener
+	address string
+	closed  bool
+}
+
+func NewHttpProxy(addr string) (*HttpListener, error) {
 	l, err := net.Listen("tcp", addr)
 	if err != nil {
 		return nil, err
 	}
-
+	hl := &HttpListener{l, addr, false}
-	done := make(chan struct{})
-	closed := make(chan struct{})
-	signal := &C.ProxySignal{
-		Done:   done,
-		Closed: closed,
-	}
 
 	go func() {
-		log.Infof("HTTP proxy listening at: %s", addr)
+		log.Infoln("HTTP proxy listening at: %s", addr)
 		for {
-			c, err := l.Accept()
+			c, err := hl.Accept()
 			if err != nil {
-				if _, open := <-done; !open {
+				if hl.closed {
 					break
 				}
 				continue
@@ -43,14 +41,16 @@ func NewHttpProxy(addr string) (*C.ProxySignal, error) {
 		}
 	}()
 
-	go func() {
+	return hl, nil
-		<-done
+}
-		close(done)
-		l.Close()
-		closed <- struct{}{}
-	}()
 
-	return signal, nil
+func (l *HttpListener) Close() {
+	l.closed = true
+	l.Listener.Close()
+}
+
+func (l *HttpListener) Address() string {
+	return l.address
 }
 
 func handleConn(conn net.Conn) {

proxy/listener.go

@@ -1,116 +1,150 @@
 package proxy
 
 import (
-	"sync"
+	"fmt"
+	"net"
+	"strconv"
 
-	"github.com/Dreamacro/clash/config"
-	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/proxy/http"
 	"github.com/Dreamacro/clash/proxy/redir"
 	"github.com/Dreamacro/clash/proxy/socks"
 )
 
 var (
-	listener *Listener
+	allowLan = false
-	once     sync.Once
+
+	socksListener *socks.SockListener
+	httpListener  *http.HttpListener
+	redirListener *redir.RedirListener
 )
 
-type Listener struct {
+type listener interface {
-	// signal for update
+	Close()
-	httpSignal  *C.ProxySignal
+	Address() string
-	socksSignal *C.ProxySignal
-	redirSignal *C.ProxySignal
 }
 
-func (l *Listener) updateHTTP(addr string) error {
+type Ports struct {
-	if l.httpSignal != nil {
+	Port      int `json:"port"`
-		signal := l.httpSignal
+	SocksPort int `json:"socks-port"`
-		signal.Done <- struct{}{}
+	RedirPort int `json:"redir-port"`
-		<-signal.Closed
-		l.httpSignal = nil
-	}
-
-	signal, err := http.NewHttpProxy(addr)
-	if err != nil {
-		return err
-	}
-
-	l.httpSignal = signal
-	return nil
 }
 
-func (l *Listener) updateSocks(addr string) error {
+func AllowLan() bool {
-	if l.socksSignal != nil {
+	return allowLan
-		signal := l.socksSignal
-		signal.Done <- struct{}{}
-		<-signal.Closed
-		l.socksSignal = nil
-	}
-
-	signal, err := socks.NewSocksProxy(addr)
-	if err != nil {
-		return err
-	}
-
-	l.socksSignal = signal
-	return nil
 }
 
-func (l *Listener) updateRedir(addr string) error {
+func SetAllowLan(al bool) {
-	if l.redirSignal != nil {
+	allowLan = al
-		signal := l.redirSignal
-		signal.Done <- struct{}{}
-		<-signal.Closed
-		l.redirSignal = nil
-	}
-
-	signal, err := redir.NewRedirProxy(addr)
-	if err != nil {
-		return err
-	}
-
-	l.redirSignal = signal
-	return nil
 }
 
-func (l *Listener) process(signal chan<- struct{}) {
+func ReCreateHTTP(port int) error {
-	sub := config.Instance().Subscribe()
+	addr := genAddr(port, allowLan)
-	signal <- struct{}{}
+
-	reportCH := config.Instance().Report()
+	if httpListener != nil {
-	for elm := range sub {
+		if httpListener.Address() == addr {
-		event := elm.(*config.Event)
+			return nil
-		switch event.Type {
-		case "http-addr":
-			addr := event.Payload.(string)
-			err := l.updateHTTP(addr)
-			reportCH <- &config.Event{Type: "http-addr", Payload: err == nil}
-		case "socks-addr":
-			addr := event.Payload.(string)
-			err := l.updateSocks(addr)
-			reportCH <- &config.Event{Type: "socks-addr", Payload: err == nil}
-		case "redir-addr":
-			addr := event.Payload.(string)
-			err := l.updateRedir(addr)
-			reportCH <- &config.Event{Type: "redir-addr", Payload: err == nil}
 		}
+		httpListener.Close()
+		httpListener = nil
 	}
+
+	if portIsZero(addr) {
+		return nil
+	}
+
+	var err error
+	httpListener, err = http.NewHttpProxy(addr)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
-// Run ensure config monitoring
+func ReCreateSocks(port int) error {
-func (l *Listener) Run() {
+	addr := genAddr(port, allowLan)
-	signal := make(chan struct{})
+
-	go l.process(signal)
+	if socksListener != nil {
-	<-signal
+		if socksListener.Address() == addr {
+			return nil
+		}
+		socksListener.Close()
+		socksListener = nil
+	}
+
+	if portIsZero(addr) {
+		return nil
+	}
+
+	var err error
+	socksListener, err = socks.NewSocksProxy(addr)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
-func newListener() *Listener {
+func ReCreateRedir(port int) error {
-	return &Listener{}
+	addr := genAddr(port, allowLan)
+
+	if redirListener != nil {
+		if redirListener.Address() == addr {
+			return nil
+		}
+		redirListener.Close()
+		redirListener = nil
+	}
+
+	if portIsZero(addr) {
+		return nil
+	}
+
+	var err error
+	redirListener, err = redir.NewRedirProxy(addr)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
-// Instance return singleton instance of Listener
+// GetPorts return the ports of proxy servers
-func Instance() *Listener {
+func GetPorts() *Ports {
-	once.Do(func() {
+	ports := &Ports{}
-		listener = newListener()
+
-	})
+	if httpListener != nil {
-	return listener
+		_, portStr, _ := net.SplitHostPort(httpListener.Address())
+		port, _ := strconv.Atoi(portStr)
+		ports.Port = port
+	}
+
+	if socksListener != nil {
+		_, portStr, _ := net.SplitHostPort(socksListener.Address())
+		port, _ := strconv.Atoi(portStr)
+		ports.SocksPort = port
+	}
+
+	if redirListener != nil {
+		_, portStr, _ := net.SplitHostPort(redirListener.Address())
+		port, _ := strconv.Atoi(portStr)
+		ports.RedirPort = port
+	}
+
+	return ports
+}
+
+func portIsZero(addr string) bool {
+	_, port, err := net.SplitHostPort(addr)
+	if port == "0" || port == "" || err != nil {
+		return true
+	}
+	return false
+}
+
+func genAddr(port int, allowLan bool) string {
+	if allowLan {
+		return fmt.Sprintf(":%d", port)
+	}
+	return fmt.Sprintf("127.0.0.1:%d", port)
 }

proxy/redir/tcp.go

@@ -5,34 +5,33 @@ import (
 
 	"github.com/Dreamacro/clash/adapters/inbound"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/tunnel"
-
-	log "github.com/sirupsen/logrus"
 )
 
 var (
 	tun = tunnel.Instance()
 )
 
-func NewRedirProxy(addr string) (*C.ProxySignal, error) {
+type RedirListener struct {
+	net.Listener
+	address string
+	closed  bool
+}
+
+func NewRedirProxy(addr string) (*RedirListener, error) {
 	l, err := net.Listen("tcp", addr)
 	if err != nil {
 		return nil, err
 	}
-
+	rl := &RedirListener{l, addr, false}
-	done := make(chan struct{})
-	closed := make(chan struct{})
-	signal := &C.ProxySignal{
-		Done:   done,
-		Closed: closed,
-	}
 
 	go func() {
-		log.Infof("Redir proxy listening at: %s", addr)
+		log.Infoln("Redir proxy listening at: %s", addr)
 		for {
 			c, err := l.Accept()
 			if err != nil {
-				if _, open := <-done; !open {
+				if rl.closed {
 					break
 				}
 				continue
@@ -41,14 +40,16 @@ func NewRedirProxy(addr string) (*C.ProxySignal, error) {
 		}
 	}()
 
-	go func() {
+	return rl, nil
-		<-done
+}
-		close(done)
-		l.Close()
-		closed <- struct{}{}
-	}()
 
-	return signal, nil
+func (l *RedirListener) Close() {
+	l.closed = true
+	l.Listener.Close()
+}
+
+func (l *RedirListener) Address() string {
+	return l.address
 }
 
 func handleRedir(conn net.Conn) {
@@ -58,5 +59,5 @@ func handleRedir(conn net.Conn) {
 		return
 	}
 	conn.(*net.TCPConn).SetKeepAlive(true)
-	tun.Add(adapters.NewSocket(target, conn))
+	tun.Add(adapters.NewSocket(target, conn, C.REDIR))
 }

proxy/socks/tcp.go

@@ -5,35 +5,35 @@ import (
 
 	"github.com/Dreamacro/clash/adapters/inbound"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/tunnel"
 
 	"github.com/Dreamacro/go-shadowsocks2/socks"
-	log "github.com/sirupsen/logrus"
 )
 
 var (
 	tun = tunnel.Instance()
 )
 
-func NewSocksProxy(addr string) (*C.ProxySignal, error) {
+type SockListener struct {
+	net.Listener
+	address string
+	closed  bool
+}
+
+func NewSocksProxy(addr string) (*SockListener, error) {
 	l, err := net.Listen("tcp", addr)
 	if err != nil {
 		return nil, err
 	}
 
-	done := make(chan struct{})
+	sl := &SockListener{l, addr, false}
-	closed := make(chan struct{})
-	signal := &C.ProxySignal{
-		Done:   done,
-		Closed: closed,
-	}
-
 	go func() {
-		log.Infof("SOCKS proxy listening at: %s", addr)
+		log.Infoln("SOCKS proxy listening at: %s", addr)
 		for {
 			c, err := l.Accept()
 			if err != nil {
-				if _, open := <-done; !open {
+				if sl.closed {
 					break
 				}
 				continue
@@ -42,14 +42,16 @@ func NewSocksProxy(addr string) (*C.ProxySignal, error) {
 		}
 	}()
 
-	go func() {
+	return sl, nil
-		<-done
+}
-		close(done)
-		l.Close()
-		closed <- struct{}{}
-	}()
 
-	return signal, nil
+func (l *SockListener) Close() {
+	l.closed = true
+	l.Listener.Close()
+}
+
+func (l *SockListener) Address() string {
+	return l.address
 }
 
 func handleSocks(conn net.Conn) {
@@ -59,5 +61,5 @@ func handleSocks(conn net.Conn) {
 		return
 	}
 	conn.(*net.TCPConn).SetKeepAlive(true)
-	tun.Add(adapters.NewSocket(target, conn))
+	tun.Add(adapters.NewSocket(target, conn, C.SOCKS))
 }

rules/domain.go

@@ -1,6 +1,8 @@
 package rules
 
 import (
+	"strings"
+
 	C "github.com/Dreamacro/clash/constant"
 )
 
@@ -30,7 +32,7 @@ func (d *Domain) Payload() string {
 
 func NewDomain(domain string, adapter string) *Domain {
 	return &Domain{
-		domain:  domain,
+		domain:  strings.ToLower(domain),
 		adapter: adapter,
 	}
 }

rules/domain_keyword.go

@@ -33,7 +33,7 @@ func (dk *DomainKeyword) Payload() string {
 
 func NewDomainKeyword(keyword string, adapter string) *DomainKeyword {
 	return &DomainKeyword{
-		keyword: keyword,
+		keyword: strings.ToLower(keyword),
 		adapter: adapter,
 	}
 }

rules/domain_suffix.go

@@ -33,7 +33,7 @@ func (ds *DomainSuffix) Payload() string {
 
 func NewDomainSuffix(suffix string, adapter string) *DomainSuffix {
 	return &DomainSuffix{
-		suffix:  suffix,
+		suffix:  strings.ToLower(suffix),
 		adapter: adapter,
 	}
 }

tunnel/log.go

@@ -1,51 +0,0 @@
-package tunnel
-
-import (
-	"fmt"
-
-	C "github.com/Dreamacro/clash/constant"
-
-	log "github.com/sirupsen/logrus"
-)
-
-type Log struct {
-	LogLevel C.LogLevel
-	Payload  string
-}
-
-func (l *Log) Type() string {
-	return l.LogLevel.String()
-}
-
-func print(data Log) {
-	switch data.LogLevel {
-	case C.INFO:
-		log.Infoln(data.Payload)
-	case C.WARNING:
-		log.Warnln(data.Payload)
-	case C.ERROR:
-		log.Errorln(data.Payload)
-	case C.DEBUG:
-		log.Debugln(data.Payload)
-	}
-}
-
-func (t *Tunnel) subscribeLogs() {
-	sub, err := t.observable.Subscribe()
-	if err != nil {
-		log.Fatalf("Can't subscribe tunnel log: %s", err.Error())
-	}
-	for elm := range sub {
-		data := elm.(Log)
-		if data.LogLevel <= t.logLevel {
-			print(data)
-		}
-	}
-}
-
-func newLog(logLevel C.LogLevel, format string, v ...interface{}) Log {
-	return Log{
-		LogLevel: logLevel,
-		Payload:  fmt.Sprintf(format, v...),
-	}
-}

tunnel/mode.go

@@ -0,0 +1,65 @@
+package tunnel
+
+import (
+	"encoding/json"
+	"errors"
+)
+
+type Mode int
+
+var (
+	// ModeMapping is a mapping for Mode enum
+	ModeMapping = map[string]Mode{
+		Global.String(): Global,
+		Rule.String():   Rule,
+		Direct.String(): Direct,
+	}
+)
+
+const (
+	Global Mode = iota
+	Rule
+	Direct
+)
+
+// UnmarshalJSON unserialize Mode
+func (m *Mode) UnmarshalJSON(data []byte) error {
+	var tp string
+	json.Unmarshal(data, &tp)
+	mode, exist := ModeMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*m = mode
+	return nil
+}
+
+// UnmarshalYAML unserialize Mode with yaml
+func (m *Mode) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var tp string
+	unmarshal(&tp)
+	mode, exist := ModeMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*m = mode
+	return nil
+}
+
+// MarshalJSON serialize Mode
+func (m Mode) MarshalJSON() ([]byte, error) {
+	return json.Marshal(m.String())
+}
+
+func (m Mode) String() string {
+	switch m {
+	case Global:
+		return "Global"
+	case Rule:
+		return "Rule"
+	case Direct:
+		return "Direct"
+	default:
+		return "Unknow"
+	}
+}

tunnel/tunnel.go

@@ -1,13 +1,14 @@
 package tunnel
 
 import (
+	"net"
 	"sync"
 	"time"
 
 	InboundAdapter "github.com/Dreamacro/clash/adapters/inbound"
-	"github.com/Dreamacro/clash/common/observable"
-	cfg "github.com/Dreamacro/clash/config"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/dns"
+	"github.com/Dreamacro/clash/log"
 
 	"gopkg.in/eapache/channels.v1"
 )
@@ -24,14 +25,10 @@ type Tunnel struct {
 	proxies    map[string]C.Proxy
 	configLock *sync.RWMutex
 	traffic    *C.Traffic
+	resolver   *dns.Resolver
 
 	// Outbound Rule
-	mode cfg.Mode
+	mode Mode
-
-	// Log
-	logCh      chan interface{}
-	observable *observable.Observable
-	logLevel   C.LogLevel
 }
 
 // Add request to queue
@@ -44,33 +41,43 @@ func (t *Tunnel) Traffic() *C.Traffic {
 	return t.traffic
 }
 
-// Log return clash log stream
+// Rules return all rules
-func (t *Tunnel) Log() *observable.Observable {
+func (t *Tunnel) Rules() []C.Rule {
-	return t.observable
+	return t.rules
 }
 
-func (t *Tunnel) configMonitor(signal chan<- struct{}) {
+// UpdateRules handle update rules
-	sub := cfg.Instance().Subscribe()
+func (t *Tunnel) UpdateRules(rules []C.Rule) {
-	signal <- struct{}{}
+	t.configLock.Lock()
-	for elm := range sub {
+	t.rules = rules
-		event := elm.(*cfg.Event)
+	t.configLock.Unlock()
-		switch event.Type {
+}
-		case "proxies":
+
-			proxies := event.Payload.(map[string]C.Proxy)
+// Proxies return all proxies
-			t.configLock.Lock()
+func (t *Tunnel) Proxies() map[string]C.Proxy {
-			t.proxies = proxies
+	return t.proxies
-			t.configLock.Unlock()
+}
-		case "rules":
+
-			rules := event.Payload.([]C.Rule)
+// UpdateProxies handle update proxies
-			t.configLock.Lock()
+func (t *Tunnel) UpdateProxies(proxies map[string]C.Proxy) {
-			t.rules = rules
+	t.configLock.Lock()
-			t.configLock.Unlock()
+	t.proxies = proxies
-		case "mode":
+	t.configLock.Unlock()
-			t.mode = event.Payload.(cfg.Mode)
+}
-		case "log-level":
+
-			t.logLevel = event.Payload.(C.LogLevel)
+// Mode return current mode
-		}
+func (t *Tunnel) Mode() Mode {
-	}
+	return t.mode
+}
+
+// SetMode change the mode of tunnel
+func (t *Tunnel) SetMode(mode Mode) {
+	t.mode = mode
+}
+
+// SetResolver change the resolver of tunnel
+func (t *Tunnel) SetResolver(resolver *dns.Resolver) {
+	t.resolver = resolver
 }
 
 func (t *Tunnel) process() {
@@ -82,15 +89,46 @@ func (t *Tunnel) process() {
 	}
 }
 
+func (t *Tunnel) resolveIP(host string) (net.IP, error) {
+	if t.resolver == nil {
+		ipAddr, err := net.ResolveIPAddr("ip", host)
+		if err != nil {
+			return nil, err
+		}
+
+		return ipAddr.IP, nil
+	}
+
+	return t.resolver.ResolveIP(host)
+}
+
 func (t *Tunnel) handleConn(localConn C.ServerAdapter) {
 	defer localConn.Close()
 	metadata := localConn.Metadata()
 
+	if metadata.Source == C.REDIR && t.resolver != nil {
+		host, exist := t.resolver.IPToHost(*metadata.IP)
+		if exist {
+			metadata.Host = host
+			metadata.AddrType = C.AtypDomainName
+		}
+	} else if metadata.IP == nil && metadata.AddrType == C.AtypDomainName {
+		ip, err := t.resolveIP(metadata.Host)
+		if err != nil {
+			log.Debugln("[DNS] resolve %s error: %s", metadata.Host, err.Error())
+		} else {
+			log.Debugln("[DNS] %s --> %s", metadata.Host, ip.String())
+			metadata.IP = &ip
+		}
+	} else {
+		log.Debugln("[DNS] unknown%#v", metadata)
+	}
+
 	var proxy C.Proxy
 	switch t.mode {
-	case cfg.Direct:
+	case Direct:
 		proxy = t.proxies["DIRECT"]
-	case cfg.Global:
+	case Global:
 		proxy = t.proxies["GLOBAL"]
 	// Rule
 	default:
@@ -98,7 +136,7 @@ func (t *Tunnel) handleConn(localConn C.ServerAdapter) {
 	}
 	remoConn, err := proxy.Generator(metadata)
 	if err != nil {
-		t.logCh <- newLog(C.WARNING, "Proxy connect error: %s", err.Error())
+		log.Warnln("Proxy[%s] connect [%s] error: %s", proxy.Name(), metadata.String(), err.Error())
 		return
 	}
 	defer remoConn.Close()
@@ -121,34 +159,21 @@ func (t *Tunnel) match(metadata *C.Metadata) C.Proxy {
 			if !ok {
 				continue
 			}
-			t.logCh <- newLog(C.INFO, "%v match %s using %s", metadata.String(), rule.RuleType().String(), rule.Adapter())
+			log.Infoln("%v match %s using %s", metadata.String(), rule.RuleType().String(), rule.Adapter())
 			return a
 		}
 	}
-	t.logCh <- newLog(C.INFO, "%v doesn't match any rule using DIRECT", metadata.String())
+	log.Infoln("%v doesn't match any rule using DIRECT", metadata.String())
 	return t.proxies["DIRECT"]
 }
 
-// Run initial task
-func (t *Tunnel) Run() {
-	go t.process()
-	go t.subscribeLogs()
-	signal := make(chan struct{})
-	go t.configMonitor(signal)
-	<-signal
-}
-
 func newTunnel() *Tunnel {
-	logCh := make(chan interface{})
 	return &Tunnel{
 		queue:      channels.NewInfiniteChannel(),
 		proxies:    make(map[string]C.Proxy),
-		observable: observable.NewObservable(logCh),
-		logCh:      logCh,
 		configLock: &sync.RWMutex{},
 		traffic:    C.NewTraffic(time.Second),
-		mode:       cfg.Rule,
+		mode:       Rule,
-		logLevel:   C.INFO,
 	}
 }
 
@@ -156,6 +181,7 @@ func newTunnel() *Tunnel {
 func Instance() *Tunnel {
 	once.Do(func() {
 		tunnel = newTunnel()
+		go tunnel.process()
 	})
 	return tunnel
 }