add bypass

cmd/gost/config.go

@@ -4,6 +4,7 @@ import (
 	"io"
 	"os"
 
+	"github.com/go-gost/gost/pkg/bypass"
 	"github.com/go-gost/gost/pkg/chain"
 	"github.com/go-gost/gost/pkg/components/connector"
 	"github.com/go-gost/gost/pkg/components/dialer"
@@ -16,12 +17,23 @@ import (
 	"github.com/go-gost/gost/pkg/service"
 )
 
+var (
+	chains   = make(map[string]*chain.Chain)
+	bypasses = make(map[string]bypass.Bypass)
+)
+
 func buildService(cfg *config.Config) (services []*service.Service) {
 	if cfg == nil || len(cfg.Services) == 0 {
 		return
 	}
 
-	chains := buildChain(cfg)
+	for _, bypassCfg := range cfg.Bypasses {
+		bypasses[bypassCfg.Name] = bypassFromConfig(&bypassCfg)
+	}
+
+	for _, chainCfg := range cfg.Chains {
+		chains[chainCfg.Name] = chainFromConfig(&chainCfg)
+	}
 
 	for _, svc := range cfg.Services {
 		listenerLogger := log.WithFields(map[string]interface{}{
@@ -37,21 +49,15 @@ func buildService(cfg *config.Config) (services []*service.Service) {
 			listenerLogger.Fatal("init:", err)
 		}
 
-		var chain *chain.Chain
-		for _, ch := range chains {
-			if svc.Chain == ch.Name {
-				chain = ch
-				break
-			}
-		}
-
 		handlerLogger := log.WithFields(map[string]interface{}{
 			"kind":    "handler",
 			"type":    svc.Handler.Type,
 			"service": svc.Name,
 		})
+
 		h := registry.GetHandler(svc.Handler.Type)(
-			handler.ChainOption(chain),
+			handler.ChainOption(chains[svc.Chain]),
+			handler.BypassOption(bypasses[svc.Bypass]),
 			handler.LoggerOption(handlerLogger),
 		)
 		if err := h.Init(metadata.MapMetadata(svc.Handler.Metadata)); err != nil {
@@ -67,27 +73,23 @@ func buildService(cfg *config.Config) (services []*service.Service) {
 	return
 }
 
-func buildChain(cfg *config.Config) (chains []*chain.Chain) {
+func chainFromConfig(cfg *config.ChainConfig) *chain.Chain {
-	if cfg == nil || len(cfg.Chains) == 0 {
+	if cfg == nil {
 		return nil
 	}
 
-	for _, ch := range cfg.Chains {
+	c := &chain.Chain{}
-		c := &chain.Chain{
-			Name: ch.Name,
-		}
 
-		selector := selectorFromConfig(ch.LB)
+	selector := selectorFromConfig(cfg.LB)
-		for _, hop := range ch.Hops {
+	for _, hop := range cfg.Hops {
 		group := &chain.NodeGroup{}
 		for _, v := range hop.Nodes {
-				node := chain.NewNode(v.Name, v.Addr)
 
 			connectorLogger := log.WithFields(map[string]interface{}{
 				"kind": "connector",
 				"type": v.Connector.Type,
 				"hop":  hop.Name,
-					"node": node.Name(),
+				"node": v.Name,
 			})
 			cr := registry.GetConnector(v.Connector.Type)(
 				connector.LoggerOption(connectorLogger),
@@ -100,7 +102,7 @@ func buildChain(cfg *config.Config) (chains []*chain.Chain) {
 				"kind": "dialer",
 				"type": v.Dialer.Type,
 				"hop":  hop.Name,
-					"node": node.Name(),
+				"node": v.Name,
 			})
 			d := registry.GetDialer(v.Dialer.Type)(
 				dialer.LoggerOption(dialerLogger),
@@ -113,7 +115,9 @@ func buildChain(cfg *config.Config) (chains []*chain.Chain) {
 				WithConnector(cr).
 				WithDialer(d)
 
-				node.WithTransport(tr)
+			node := chain.NewNode(v.Name, v.Addr).
+				WithTransport(tr).
+				WithBypass(bypasses[v.Bypass])
 			group.AddNode(node)
 		}
 
@@ -125,10 +129,7 @@ func buildChain(cfg *config.Config) (chains []*chain.Chain) {
 		c.AddNodeGroup(group)
 	}
 
-		chains = append(chains, c)
+	return c
-	}
-
-	return
 }
 
 func logFromConfig(cfg *config.LogConfig) logger.Logger {
@@ -182,3 +183,11 @@ func selectorFromConfig(cfg *config.LoadbalancingConfig) chain.Selector {
 		},
 	)
 }
+
+func bypassFromConfig(cfg *config.BypassConfig) bypass.Bypass {
+	if cfg == nil {
+		return nil
+	}
+
+	return bypass.NewBypassPatterns(cfg.Reverse, cfg.Matchers...)
+}

cmd/gost/gost.yml

@@ -22,6 +22,7 @@ services:
     metadata:
       keepAlive: 15s
   chain: chain01
+  # bypass: bypass01
 
 chains:
 - name: chain01
@@ -41,6 +42,7 @@ chains:
     - name: node01
       addr: ":8081"
       url: "http://gost:gost@:8081"
+      # bypass: bypass01
       connector:
         type: http
         metadata:
@@ -52,11 +54,12 @@ chains:
     - name: node02
       addr: ":8082"
       url: "http://gost:gost@:8082"
+      # bypass: bypass01
       connector:
         type: http
         metadata:
           userAgent: "gost/3.0"
-          auth: user1:pass1
+          auth: user2:pass2
       dialer:
         type: tcp
         metadata: {}
@@ -70,11 +73,42 @@ chains:
     - name: node03
       addr: ":8083"
       url: "http://gost:gost@:8083"
+      # bypass: bypass01
       connector:
         type: http
         metadata:
           userAgent: "gost/3.0"
-          auth: user1:pass1
+          auth: user3:pass3
       dialer:
         type: tcp
         metadata: {}
+
+bypasses:
+- name: bypass01
+  reverse: false
+  matchers:
+  - .baidu.com
+  - "*.example.com"       # domain wildcard
+  - .example.org        # will match example.org and *.example.org
+
+  # From IANA IPv4 Special-Purpose Address Registry
+  # http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
+  - 0.0.0.0/8           # RFC1122: "This host on this network"
+  - 10.0.0.0/8          # RFC1918: Private-Use
+  - 100.64.0.0/10       # RFC6598: Shared Address Space
+  - 127.0.0.0/8         # RFC1122: Loopback
+  - 169.254.0.0/16      # RFC3927: Link Local
+  - 172.16.0.0/12       # RFC1918: Private-Use
+  - 192.0.0.0/24        # RFC6890: IETF Protocol Assignments
+  - 192.0.2.0/24        # RFC5737: Documentation (TEST-NET-1)
+  - 192.88.99.0/24      # RFC3068: 6to4 Relay Anycast
+  - 192.168.0.0/16      # RFC1918: Private-Use
+  - 198.18.0.0/15       # RFC2544: Benchmarking
+  - 198.51.100.0/24     # RFC5737: Documentation (TEST-NET-2)
+  - 203.0.113.0/24      # RFC5737: Documentation (TEST-NET-3)
+  - 240.0.0.0/4         # RFC1112: Reserved
+  - 255.255.255.255/32  # RFC0919: Limited Broadcast
+
+  # From IANA Multicast Address Space Registry
+  # http://www.iana.org/assignments/multicast-addresses/multicast-addresses.xhtml
+  - 224.0.0.0/4         # RFC5771: Multicast/Reserved

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/coreos/go-iptables v0.5.0 // indirect
 	github.com/ginuerzh/tls-dissector v0.0.2-0.20201202075250-98fa925912da
 	github.com/go-gost/gosocks5 v0.3.0
+	github.com/gobwas/glob v0.2.3
 	github.com/golang/snappy v0.0.3
 	github.com/google/gopacket v1.1.19 // indirect
 	github.com/gorilla/websocket v1.4.2

go.sum

@@ -113,6 +113,8 @@ github.com/go-gost/gosocks5 v0.3.0 h1:Hkmp9YDRBSCJd7xywW6dBPT6B9aQTkuWd+3WCheJiJ
 github.com/go-gost/gosocks5 v0.3.0/go.mod h1:1G6I7HP7VFVxveGkoK8mnprnJqSqJjdcASKsdUn4Pp4=
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 h1:p104kn46Q8WdvHunIJ9dAyjPVtrBPhSr3KT2yUst43I=
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
+github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
+github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=

pkg/bypass/bypass.go

@@ -0,0 +1,158 @@
+package bypass
+
+import (
+	"net"
+	"strconv"
+	"strings"
+
+	glob "github.com/gobwas/glob"
+)
+
+// Matcher is a generic pattern matcher,
+// it gives the match result of the given pattern for specific v.
+type Matcher interface {
+	Match(v string) bool
+}
+
+// NewMatcher creates a Matcher for the given pattern.
+// The acutal Matcher depends on the pattern:
+// IP Matcher if pattern is a valid IP address.
+// CIDR Matcher if pattern is a valid CIDR address.
+// Domain Matcher if both of the above are not.
+func NewMatcher(pattern string) Matcher {
+	if pattern == "" {
+		return nil
+	}
+	if ip := net.ParseIP(pattern); ip != nil {
+		return IPMatcher(ip)
+	}
+	if _, inet, err := net.ParseCIDR(pattern); err == nil {
+		return CIDRMatcher(inet)
+	}
+	return DomainMatcher(pattern)
+}
+
+type ipMatcher struct {
+	ip net.IP
+}
+
+// IPMatcher creates a Matcher for a specific IP address.
+func IPMatcher(ip net.IP) Matcher {
+	return &ipMatcher{
+		ip: ip,
+	}
+}
+
+func (m *ipMatcher) Match(ip string) bool {
+	if m == nil {
+		return false
+	}
+	return m.ip.Equal(net.ParseIP(ip))
+}
+
+type cidrMatcher struct {
+	ipNet *net.IPNet
+}
+
+// CIDRMatcher creates a Matcher for a specific CIDR notation IP address.
+func CIDRMatcher(inet *net.IPNet) Matcher {
+	return &cidrMatcher{
+		ipNet: inet,
+	}
+}
+
+func (m *cidrMatcher) Match(ip string) bool {
+	if m == nil || m.ipNet == nil {
+		return false
+	}
+	return m.ipNet.Contains(net.ParseIP(ip))
+}
+
+type domainMatcher struct {
+	pattern string
+	glob    glob.Glob
+}
+
+// DomainMatcher creates a Matcher for a specific domain pattern,
+// the pattern can be a plain domain such as 'example.com',
+// a wildcard such as '*.exmaple.com' or a special wildcard '.example.com'.
+func DomainMatcher(pattern string) Matcher {
+	p := pattern
+	if strings.HasPrefix(pattern, ".") {
+		p = pattern[1:] // trim the prefix '.'
+		pattern = "*" + p
+	}
+	return &domainMatcher{
+		pattern: p,
+		glob:    glob.MustCompile(pattern),
+	}
+}
+
+func (m *domainMatcher) Match(domain string) bool {
+	if m == nil || m.glob == nil {
+		return false
+	}
+
+	if domain == m.pattern {
+		return true
+	}
+	return m.glob.Match(domain)
+}
+
+// Bypass is a filter of address (IP or domain).
+type Bypass interface {
+	// Contains reports whether the bypass includes addr.
+	Contains(addr string) bool
+}
+
+type bypass struct {
+	matchers []Matcher
+	reversed bool
+}
+
+// NewBypass creates and initializes a new Bypass using matchers as its match rules.
+// The rules will be reversed if the reversed is true.
+func NewBypass(reversed bool, matchers ...Matcher) Bypass {
+	return &bypass{
+		matchers: matchers,
+		reversed: reversed,
+	}
+}
+
+// NewBypassPatterns creates and initializes a new Bypass using matcher patterns as its match rules.
+// The rules will be reversed if the reverse is true.
+func NewBypassPatterns(reversed bool, patterns ...string) Bypass {
+	var matchers []Matcher
+	for _, pattern := range patterns {
+		if m := NewMatcher(pattern); m != nil {
+			matchers = append(matchers, m)
+		}
+	}
+	return NewBypass(reversed, matchers...)
+}
+
+func (bp *bypass) Contains(addr string) bool {
+	if addr == "" || bp == nil || len(bp.matchers) == 0 {
+		return false
+	}
+
+	// try to strip the port
+	if host, port, _ := net.SplitHostPort(addr); host != "" && port != "" {
+		if p, _ := strconv.Atoi(port); p > 0 { // port is valid
+			addr = host
+		}
+	}
+
+	var matched bool
+	for _, matcher := range bp.matchers {
+		if matcher == nil {
+			continue
+		}
+		if matcher.Match(addr) {
+			matched = true
+			break
+		}
+	}
+	return !bp.reversed && matched ||
+		bp.reversed && !matched
+}

pkg/chain/chain.go

@@ -1,7 +1,6 @@
 package chain
 
 type Chain struct {
-	Name   string
 	groups []*NodeGroup
 }
 
@@ -9,7 +8,7 @@ func (c *Chain) AddNodeGroup(group *NodeGroup) {
 	c.groups = append(c.groups, group)
 }
 
-func (c *Chain) GetRoute() (r *Route) {
+func (c *Chain) GetRouteFor(addr string) (r *Route) {
 	if c == nil || len(c.groups) == 0 {
 		return
 	}
@@ -20,11 +19,13 @@ func (c *Chain) GetRoute() (r *Route) {
 		if node == nil {
 			return
 		}
-		// TODO: bypass
+		if node.bypass != nil && node.bypass.Contains(addr) {
+			break
+		}
 
-		if node.Transport().IsMultiplex() {
+		if node.transport.IsMultiplex() {
-			tr := node.Transport().WithRoute(r)
+			tr := node.transport.Copy().WithRoute(r)
-			node = node.WithTransport(tr)
+			node = node.Copy().WithTransport(tr)
 			r = &Route{}
 		}
 

pkg/chain/node.go

@@ -3,12 +3,15 @@ package chain
 import (
 	"sync"
 	"time"
+
+	"github.com/go-gost/gost/pkg/bypass"
 )
 
 type Node struct {
 	name      string
 	addr      string
 	transport *Transport
+	bypass    bypass.Bypass
 	marker    *failMarker
 }
 
@@ -28,15 +31,22 @@ func (node *Node) Addr() string {
 	return node.addr
 }
 
-func (node *Node) Transport() *Transport {
-	return node.transport
-}
-
 func (node *Node) WithTransport(tr *Transport) *Node {
 	node.transport = tr
 	return node
 }
 
+func (node *Node) WithBypass(bp bypass.Bypass) *Node {
+	node.bypass = bp
+	return node
+}
+
+func (node *Node) Copy() *Node {
+	n := &Node{}
+	*n = *node
+	return n
+}
+
 type NodeGroup struct {
 	nodes    []*Node
 	selector Selector

pkg/chain/route.go

@@ -20,13 +20,13 @@ func (r *Route) Connect(ctx context.Context) (conn net.Conn, err error) {
 	}
 
 	node := r.nodes[0]
-	cc, err := node.Transport().Dial(ctx, r.nodes[0].Addr())
+	cc, err := node.transport.Dial(ctx, r.nodes[0].Addr())
 	if err != nil {
 		node.marker.Mark()
 		return
 	}
 
-	cn, err := node.Transport().Handshake(ctx, cc)
+	cn, err := node.transport.Handshake(ctx, cc)
 	if err != nil {
 		cc.Close()
 		node.marker.Mark()
@@ -36,7 +36,7 @@ func (r *Route) Connect(ctx context.Context) (conn net.Conn, err error) {
 
 	preNode := node
 	for _, node := range r.nodes[1:] {
-		cc, err = preNode.Transport().Connect(ctx, cn, "tcp", node.Addr())
+		cc, err = preNode.transport.Connect(ctx, cn, "tcp", node.Addr())
 		if err != nil {
 			cn.Close()
 			node.marker.Mark()
@@ -68,7 +68,7 @@ func (r *Route) Dial(ctx context.Context, network, address string) (net.Conn, er
 		return nil, err
 	}
 
-	cc, err := r.Last().Transport().Connect(ctx, conn, network, address)
+	cc, err := r.Last().transport.Connect(ctx, conn, network, address)
 	if err != nil {
 		conn.Close()
 		return nil, err
@@ -93,9 +93,19 @@ func (r *Route) IsEmpty() bool {
 	return r == nil || len(r.nodes) == 0
 }
 
-func (r Route) Last() *Node {
+func (r *Route) Last() *Node {
 	if r.IsEmpty() {
 		return nil
 	}
 	return r.nodes[len(r.nodes)-1]
 }
+
+func (r *Route) Path() (path []*Node) {
+	for _, node := range r.nodes {
+		if node.transport != nil && node.transport.route != nil {
+			path = append(path, node.transport.route.Path()...)
+		}
+		path = append(path, node)
+	}
+	return
+}

pkg/chain/transport.go

@@ -14,6 +14,12 @@ type Transport struct {
 	connector connector.Connector
 }
 
+func (tr *Transport) Copy() *Transport {
+	tr2 := &Transport{}
+	*tr2 = *tr
+	return tr
+}
+
 func (tr *Transport) WithDialer(dialer dialer.Dialer) *Transport {
 	tr.dialer = dialer
 	return tr

pkg/components/connector/http/connector.go

@@ -21,7 +21,7 @@ func init() {
 	registry.RegiserConnector("http", NewConnector)
 }
 
-type Connector struct {
+type httpConnector struct {
 	md     metadata
 	logger logger.Logger
 }
@@ -32,16 +32,16 @@ func NewConnector(opts ...connector.Option) connector.Connector {
 		opt(options)
 	}
 
-	return &Connector{
+	return &httpConnector{
 		logger: options.Logger,
 	}
 }
 
-func (c *Connector) Init(md md.Metadata) (err error) {
+func (c *httpConnector) Init(md md.Metadata) (err error) {
 	return c.parseMetadata(md)
 }
 
-func (c *Connector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
+func (c *httpConnector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
 	req := &http.Request{
 		Method:     http.MethodConnect,
 		URL:        &url.URL{Host: address},
@@ -95,7 +95,7 @@ func (c *Connector) Connect(ctx context.Context, conn net.Conn, network, address
 	return conn, nil
 }
 
-func (c *Connector) parseMetadata(md md.Metadata) (err error) {
+func (c *httpConnector) parseMetadata(md md.Metadata) (err error) {
 	c.md.UserAgent, _ = md.Get(userAgent).(string)
 	if c.md.UserAgent == "" {
 		c.md.UserAgent = defaultUserAgent

pkg/components/dialer/tcp/dialer.go

@@ -14,7 +14,7 @@ func init() {
 	registry.RegisterDialer("tcp", NewDialer)
 }
 
-type Dialer struct {
+type tcpDialer struct {
 	md     metadata
 	logger logger.Logger
 }
@@ -25,16 +25,16 @@ func NewDialer(opts ...dialer.Option) dialer.Dialer {
 		opt(options)
 	}
 
-	return &Dialer{
+	return &tcpDialer{
 		logger: options.Logger,
 	}
 }
 
-func (d *Dialer) Init(md md.Metadata) (err error) {
+func (d *tcpDialer) Init(md md.Metadata) (err error) {
 	return d.parseMetadata(md)
 }
 
-func (d *Dialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (net.Conn, error) {
+func (d *tcpDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (net.Conn, error) {
 	var options dialer.DialOptions
 	for _, opt := range opts {
 		opt(&options)
@@ -71,6 +71,6 @@ func (d *Dialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOptio
 	return conn, err
 }
 
-func (d *Dialer) parseMetadata(md md.Metadata) (err error) {
+func (d *tcpDialer) parseMetadata(md md.Metadata) (err error) {
 	return
 }

pkg/components/handler/http/handler.go

@@ -2,10 +2,12 @@ package http
 
 import (
 	"bufio"
+	"bytes"
 	"context"
 	"encoding/base64"
 	"encoding/binary"
 	"errors"
+	"fmt"
 	"hash/crc32"
 	"net"
 	"net/http"
@@ -16,6 +18,7 @@ import (
 	"time"
 
 	"github.com/go-gost/gost/pkg/auth"
+	"github.com/go-gost/gost/pkg/bypass"
 	"github.com/go-gost/gost/pkg/chain"
 	"github.com/go-gost/gost/pkg/components/handler"
 	md "github.com/go-gost/gost/pkg/components/metadata"
@@ -27,8 +30,9 @@ func init() {
 	registry.RegisterHandler("http", NewHandler)
 }
 
-type Handler struct {
+type httpHandler struct {
 	chain  *chain.Chain
+	bypass bypass.Bypass
 	logger logger.Logger
 	md     metadata
 }
@@ -39,17 +43,18 @@ func NewHandler(opts ...handler.Option) handler.Handler {
 		opt(options)
 	}
 
-	return &Handler{
+	return &httpHandler{
 		chain:  options.Chain,
+		bypass: options.Bypass,
 		logger: options.Logger,
 	}
 }
 
-func (h *Handler) Init(md md.Metadata) error {
+func (h *httpHandler) Init(md md.Metadata) error {
 	return h.parseMetadata(md)
 }
 
-func (h *Handler) parseMetadata(md md.Metadata) error {
+func (h *httpHandler) parseMetadata(md md.Metadata) error {
 	h.md.proxyAgent = md.GetString(proxyAgentKey)
 
 	if v, _ := md.Get(authsKey).([]interface{}); len(v) > 0 {
@@ -81,7 +86,7 @@ func (h *Handler) parseMetadata(md md.Metadata) error {
 	return nil
 }
 
-func (h *Handler) Handle(ctx context.Context, conn net.Conn) {
+func (h *httpHandler) Handle(ctx context.Context, conn net.Conn) {
 	defer conn.Close()
 
 	h.logger = h.logger.WithFields(map[string]interface{}{
@@ -99,7 +104,7 @@ func (h *Handler) Handle(ctx context.Context, conn net.Conn) {
 	h.handleRequest(ctx, conn, req)
 }
 
-func (h *Handler) handleRequest(ctx context.Context, conn net.Conn, req *http.Request) {
+func (h *httpHandler) handleRequest(ctx context.Context, conn net.Conn, req *http.Request) {
 	if req == nil {
 		return
 	}
@@ -156,21 +161,18 @@ func (h *Handler) handleRequest(ctx context.Context, conn net.Conn, req *http.Re
 		}
 	*/
 
-	/*
+	if h.bypass != nil && h.bypass.Contains(host) {
-		if h.options.Bypass.Contains(host) {
 		resp.StatusCode = http.StatusForbidden
 
-			log.Logf("[http] %s - %s bypass %s",
+		if h.logger.IsLevelEnabled(logger.DebugLevel) {
-				conn.RemoteAddr(), conn.LocalAddr(), host)
-			if Debug {
 			dump, _ := httputil.DumpResponse(resp, false)
-				log.Logf("[http] %s <- %s\n%s", conn.RemoteAddr(), conn.LocalAddr(), string(dump))
+			h.logger.Debug(string(dump))
 		}
+		h.logger.Info("bypass: ", host)
 
 		resp.Write(conn)
 		return
 	}
-	*/
 
 	if !h.authenticate(conn, req, resp) {
 		return
@@ -200,6 +202,7 @@ func (h *Handler) handleRequest(ctx context.Context, conn net.Conn, req *http.Re
 			dump, _ := httputil.DumpResponse(resp, false)
 			h.logger.Debug(string(dump))
 		}
+		h.logger.Error(err)
 		return
 	}
 	defer cc.Close()
@@ -227,25 +230,21 @@ func (h *Handler) handleRequest(ctx context.Context, conn net.Conn, req *http.Re
 	handler.Transport(conn, cc)
 }
 
-func (h *Handler) dial(ctx context.Context, addr string) (conn net.Conn, err error) {
+func (h *httpHandler) dial(ctx context.Context, addr string) (conn net.Conn, err error) {
 	count := h.md.retryCount + 1
 	if count <= 0 {
 		count = 1
 	}
 
 	for i := 0; i < count; i++ {
-		route := h.chain.GetRoute()
+		route := h.chain.GetRouteFor(addr)
 
-		/*
 		buf := bytes.Buffer{}
-			fmt.Fprintf(&buf, "%s -> %s -> ",
+		for _, node := range route.Path() {
-				conn.RemoteAddr(), h.options.Node.String())
+			fmt.Fprintf(&buf, "%s@%s -> ", node.Name(), node.Addr())
-			for _, nd := range route.route {
-				fmt.Fprintf(&buf, "%d@%s -> ", nd.ID, nd.String())
 		}
-			fmt.Fprintf(&buf, "%s", host)
+		fmt.Fprintf(&buf, "%s", addr)
-			log.Log("[route]", buf.String())
+		h.logger.Infof("route(retry=%d): %s", i, buf.String())
-		*/
 
 		/*
 			// forward http request
@@ -270,7 +269,7 @@ func (h *Handler) dial(ctx context.Context, addr string) (conn net.Conn, err err
 	return
 }
 
-func (h *Handler) decodeServerName(s string) (string, error) {
+func (h *httpHandler) decodeServerName(s string) (string, error) {
 	b, err := base64.RawURLEncoding.DecodeString(s)
 	if err != nil {
 		return "", err
@@ -288,7 +287,7 @@ func (h *Handler) decodeServerName(s string) (string, error) {
 	return string(v), nil
 }
 
-func (h *Handler) basicProxyAuth(proxyAuth string) (username, password string, ok bool) {
+func (h *httpHandler) basicProxyAuth(proxyAuth string) (username, password string, ok bool) {
 	if proxyAuth == "" {
 		return
 	}
@@ -309,7 +308,7 @@ func (h *Handler) basicProxyAuth(proxyAuth string) (username, password string, o
 	return cs[:s], cs[s+1:], true
 }
 
-func (h *Handler) authenticate(conn net.Conn, req *http.Request, resp *http.Response) (ok bool) {
+func (h *httpHandler) authenticate(conn net.Conn, req *http.Request, resp *http.Response) (ok bool) {
 	u, p, _ := h.basicProxyAuth(req.Header.Get("Proxy-Authorization"))
 	if h.md.authenticator == nil || h.md.authenticator.Authenticate(u, p) {
 		return true

pkg/components/handler/http/middleware.go

@@ -1 +0,0 @@
-package http

pkg/components/handler/option.go

@@ -1,12 +1,14 @@
 package handler
 
 import (
+	"github.com/go-gost/gost/pkg/bypass"
 	"github.com/go-gost/gost/pkg/chain"
 	"github.com/go-gost/gost/pkg/logger"
 )
 
 type Options struct {
 	Chain  *chain.Chain
+	Bypass bypass.Bypass
 	Logger logger.Logger
 }
 
@@ -23,3 +25,9 @@ func ChainOption(chain *chain.Chain) Option {
 		opts.Chain = chain
 	}
 }
+
+func BypassOption(bypass bypass.Bypass) Option {
+	return func(opts *Options) {
+		opts.Bypass = bypass
+	}
+}

pkg/components/handler/ss/handler.go

@@ -7,6 +7,8 @@ import (
 	"time"
 
 	"github.com/go-gost/gosocks5"
+	"github.com/go-gost/gost/pkg/bypass"
+	"github.com/go-gost/gost/pkg/chain"
 	"github.com/go-gost/gost/pkg/components/handler"
 	md "github.com/go-gost/gost/pkg/components/metadata"
 	"github.com/go-gost/gost/pkg/logger"
@@ -19,7 +21,9 @@ func init() {
 	registry.RegisterHandler("ss", NewHandler)
 }
 
-type Handler struct {
+type ssHandler struct {
+	chain  *chain.Chain
+	bypass bypass.Bypass
 	logger logger.Logger
 	md     metadata
 }
@@ -30,18 +34,25 @@ func NewHandler(opts ...handler.Option) handler.Handler {
 		opt(options)
 	}
 
-	return &Handler{
+	return &ssHandler{
+		chain:  options.Chain,
+		bypass: options.Bypass,
 		logger: options.Logger,
 	}
 }
 
-func (h *Handler) Init(md md.Metadata) (err error) {
+func (h *ssHandler) Init(md md.Metadata) (err error) {
 	return h.parseMetadata(md)
 }
 
-func (h *Handler) Handle(ctx context.Context, conn net.Conn) {
+func (h *ssHandler) Handle(ctx context.Context, conn net.Conn) {
 	defer conn.Close()
 
+	h.logger = h.logger.WithFields(map[string]interface{}{
+		"src":   conn.RemoteAddr().String(),
+		"local": conn.LocalAddr().String(),
+	})
+
 	if h.md.cipher != nil {
 		conn = &shadowConn{
 			Conn: h.md.cipher.StreamConn(conn),
@@ -61,9 +72,18 @@ func (h *Handler) Handle(ctx context.Context, conn net.Conn) {
 
 	conn.SetReadDeadline(time.Time{})
 
-	host := addr.String()
+	h.logger = h.logger.WithFields(map[string]interface{}{
-	cc, err := net.Dial("tcp", host)
+		"dst": addr.String(),
+	})
+
+	if h.bypass != nil && h.bypass.Contains(addr.String()) {
+		h.logger.Info("bypass: ", addr.String())
+		return
+	}
+
+	cc, err := h.dial(ctx, addr.String())
 	if err != nil {
+		h.logger.Error(err)
 		return
 	}
 	defer cc.Close()
@@ -71,7 +91,7 @@ func (h *Handler) Handle(ctx context.Context, conn net.Conn) {
 	handler.Transport(conn, cc)
 }
 
-func (h *Handler) parseMetadata(md md.Metadata) (err error) {
+func (h *ssHandler) parseMetadata(md md.Metadata) (err error) {
 	h.md.cipher, err = h.initCipher(
 		md.GetString(method),
 		md.GetString(password),
@@ -82,10 +102,41 @@ func (h *Handler) parseMetadata(md md.Metadata) (err error) {
 	}
 
 	h.md.readTimeout = md.GetDuration(readTimeout)
+	h.md.retryCount = md.GetInt(retryCount)
 	return
 }
 
-func (h *Handler) initCipher(method, password string, key string) (core.Cipher, error) {
+func (h *ssHandler) dial(ctx context.Context, addr string) (conn net.Conn, err error) {
+	count := h.md.retryCount + 1
+	if count <= 0 {
+		count = 1
+	}
+
+	for i := 0; i < count; i++ {
+		route := h.chain.GetRouteFor(addr)
+
+		/*
+			buf := bytes.Buffer{}
+			fmt.Fprintf(&buf, "%s -> %s -> ",
+				conn.RemoteAddr(), h.options.Node.String())
+			for _, nd := range route.route {
+				fmt.Fprintf(&buf, "%d@%s -> ", nd.ID, nd.String())
+			}
+			fmt.Fprintf(&buf, "%s", host)
+			log.Log("[route]", buf.String())
+		*/
+
+		conn, err = route.Dial(ctx, "tcp", addr)
+		if err == nil {
+			break
+		}
+		h.logger.Errorf("route(retry=%d): %s", i, err)
+	}
+
+	return
+}
+
+func (h *ssHandler) initCipher(method, password string, key string) (core.Cipher, error) {
 	if method == "" && password == "" {
 		return nil, nil
 	}

pkg/components/handler/ss/metadata.go

@@ -11,9 +11,11 @@ const (
 	password    = "password"
 	key         = "key"
 	readTimeout = "readTimeout"
+	retryCount  = "retry"
 )
 
 type metadata struct {
 	cipher      core.Cipher
 	readTimeout time.Duration
+	retryCount  int
 }

pkg/config/config.go

@@ -30,6 +30,11 @@ type LoadbalancingConfig struct {
 	FailTimeout time.Duration
 }
 
+type BypassConfig struct {
+	Name     string
+	Reverse  bool
+	Matchers []string
+}
 type ListenerConfig struct {
 	Type     string
 	Metadata map[string]interface{}
@@ -57,6 +62,7 @@ type ServiceConfig struct {
 	Listener *ListenerConfig
 	Handler  *HandlerConfig
 	Chain    string
+	Bypass   string
 }
 
 type ChainConfig struct {
@@ -77,12 +83,14 @@ type NodeConfig struct {
 	Addr      string
 	Dialer    *DialerConfig
 	Connector *ConnectorConfig
+	Bypass    string
 }
 
 type Config struct {
 	Log      *LogConfig
 	Services []ServiceConfig
 	Chains   []ChainConfig
+	Bypasses []BypassConfig
 }
 
 func (c *Config) Load() error {

pkg/logger/logger.go

@@ -85,7 +85,10 @@ func NewLogger(opts ...LoggerOption) Logger {
 
 	switch options.Format {
 	case JSONFormat:
-		log.SetFormatter(&logrus.JSONFormatter{})
+		log.SetFormatter(&logrus.JSONFormatter{
+			DisableHTMLEscape: true,
+			// PrettyPrint:       true,
+		})
 	default:
 		log.SetFormatter(&logrus.TextFormatter{
 			FullTimestamp: true,