add node ID

chain.go

 package gost
 
 import (
+	"bytes"
 	"errors"
+	"fmt"
 	"net"
-	"strings"
 
 	"github.com/go-log/log"
 )
@@ -124,29 +125,6 @@ func (c *Chain) Conn() (conn net.Conn, err error) {
 	return
 }
 
-func (c *Chain) selectRoute() (route *Chain, err error) {
-	route = NewChain()
-	for _, group := range c.nodeGroups {
-		selector := group.Selector
-		if selector == nil {
-			selector = &defaultSelector{}
-		}
-		// select node from node group
-		node, err := selector.Select(group.Nodes(), group.Options...)
-		if err != nil {
-			return nil, err
-		}
-		if node.Client.Transporter.Multiplex() {
-			node.DialOptions = append(node.DialOptions,
-				ChainDialOption(route),
-			)
-			route = NewChain() // cutoff the chain for multiplex
-		}
-		route.AddNode(node)
-	}
-	return
-}
-
 func (c *Chain) getConn(route *Chain) (conn net.Conn, err error) {
 	if route.IsEmpty() {
 		err = ErrEmptyChain
@@ -155,11 +133,7 @@ func (c *Chain) getConn(route *Chain) (conn net.Conn, err error) {
 	nodes := route.Nodes()
 	node := nodes[0]
 
-	addr, err := selectIP(&node)
-	if err != nil {
-		return
-	}
-	cn, err := node.Client.Dial(addr, node.DialOptions...)
+	cn, err := node.Client.Dial(node.Addr, node.DialOptions...)
 	if err != nil {
 		return
 	}
@@ -171,13 +145,8 @@ func (c *Chain) getConn(route *Chain) (conn net.Conn, err error) {
 
 	preNode := node
 	for _, node := range nodes[1:] {
-		addr, err = selectIP(&node)
-		if err != nil {
-			return
-		}
-
 		var cc net.Conn
-		cc, err = preNode.Client.Connect(cn, addr)
+		cc, err = preNode.Client.Connect(cn, node.Addr)
 		if err != nil {
 			cn.Close()
 			return
@@ -195,8 +164,37 @@ func (c *Chain) getConn(route *Chain) (conn net.Conn, err error) {
 	return
 }
 
+func (c *Chain) selectRoute() (route *Chain, err error) {
+	buf := bytes.Buffer{}
+	route = NewChain()
+	for _, group := range c.nodeGroups {
+		selector := group.Selector
+		if selector == nil {
+			selector = &defaultSelector{}
+		}
+		// select node from node group
+		node, err := selector.Select(group.Nodes(), group.Options...)
+		if err != nil {
+			return nil, err
+		}
+		if _, err := selectIP(&node); err != nil {
+			return nil, err
+		}
+		buf.WriteString(fmt.Sprintf("%d@%s -> ", node.ID, node.Addr))
+
+		if node.Client.Transporter.Multiplex() {
+			node.DialOptions = append(node.DialOptions,
+				ChainDialOption(route),
+			)
+			route = NewChain() // cutoff the chain for multiplex
+		}
+		route.AddNode(node)
+	}
+	log.Log("select route:", buf.String())
+	return
+}
+
 func selectIP(node *Node) (string, error) {
-	addr := node.Addr
 	s := node.IPSelector
 	if s == nil {
 		s = &RandomIPSelector{}
@@ -207,17 +205,9 @@ func selectIP(node *Node) (string, error) {
 		return "", err
 	}
 	if ip != "" {
-		if !strings.Contains(ip, ":") {
-			_, sport, err := net.SplitHostPort(addr)
-			if err != nil {
-				return "", err
-			}
-			ip = ip + ":" + sport
-		}
-		addr = ip
 		// override the original address
-		node.HandshakeOptions = append(node.HandshakeOptions, AddrHandshakeOption(addr))
+		node.Addr = ip
+		node.HandshakeOptions = append(node.HandshakeOptions, AddrHandshakeOption(node.Addr))
 	}
-	log.Log("select IP:", node.Addr, node.IPs, addr)
-	return addr, nil
+	return node.Addr, nil
 }

cmd/gost/main.go

@@ -94,6 +94,9 @@ func initChain() (*gost.Chain, error) {
 			return nil, err
 		}
 
+		id := 1 // start from 1
+
+		node.ID = id
 		ngroup := gost.NewNodeGroup(node)
 
 		// parse node peers if exists
@@ -110,6 +113,8 @@ func initChain() (*gost.Chain, error) {
 			if err != nil {
 				return nil, err
 			}
+			id++
+			node.ID = id
 			ngroup.AddNode(node)
 		}
 
@@ -126,6 +131,15 @@ func parseChainNode(ns string) (node gost.Node, err error) {
 	}
 
 	node.IPs = parseIP(node.Values.Get("ip"))
+	for i, ip := range node.IPs {
+		if !strings.Contains(ip, ":") {
+			_, sport, _ := net.SplitHostPort(node.Addr)
+			if sport == "" {
+				sport = "8080" // default port
+			}
+			node.IPs[i] = ip + ":" + sport
+		}
+	}
 	node.IPSelector = &gost.RoundRobinIPSelector{}
 
 	users, err := parseUsers(node.Values.Get("secrets"))
@@ -592,11 +606,12 @@ func loadPeerConfig(peer string) (config peerConfig, err error) {
 
 func parseStrategy(s string) gost.Strategy {
 	switch s {
-	case "round":
-		return &gost.RoundStrategy{}
 	case "random":
+		return &gost.RandomStrategy{}
+	case "round":
 		fallthrough
 	default:
-		return &gost.RandomStrategy{}
+		return &gost.RoundStrategy{}
+
 	}
 }

gost.go

@@ -56,6 +56,7 @@ func SetLogger(logger log.Logger) {
 	log.DefaultLogger = logger
 }
 
+// GenCertificate generates a random TLS certificate
 func GenCertificate() (cert tls.Certificate, err error) {
 	rawCert, rawKey, err := generateKeyPair()
 	if err != nil {

http.go

@@ -93,6 +93,13 @@ func (h *httpHandler) Handle(conn net.Conn) {
 		return
 	}
 
+	h.handleRequest(conn, req)
+}
+
+func (h *httpHandler) handleRequest(conn net.Conn, req *http.Request) {
+	if req == nil {
+		return
+	}
 	if Debug {
 		dump, _ := httputil.DumpRequest(req, false)
 		log.Logf("[http] %s -> %s\n%s", conn.RemoteAddr(), req.Host, string(dump))

node.go

@@ -3,10 +3,12 @@ package gost
 import (
 	"net/url"
 	"strings"
+	"sync"
 )
 
 // Node is a proxy node, mainly used to construct a proxy chain.
 type Node struct {
+	ID               int
 	Addr             string
 	IPs              []string
 	Protocol         string
@@ -81,15 +83,21 @@ func ParseNode(s string) (node Node, err error) {
 
 // NodeGroup is a group of nodes.
 type NodeGroup struct {
-	nodes    []Node
-	Options  []SelectOption
-	Selector NodeSelector
+	nodes       []Node
+	Options     []SelectOption
+	Selector    NodeSelector
+	mutex       sync.Mutex
+	mFails      map[string]int // node -> fail count
+	MaxFails    int
+	FailTimeout int
+	Retries     int
 }
 
 // NewNodeGroup creates a node group
 func NewNodeGroup(nodes ...Node) *NodeGroup {
 	return &NodeGroup{
-		nodes: nodes,
+		nodes:  nodes,
+		mFails: make(map[string]int),
 	}
 }
 

sni.go

@@ -11,6 +11,7 @@ import (
 	"hash/crc32"
 	"io"
 	"net"
+	"net/http"
 	"strings"
 	"sync"
 
@@ -53,15 +54,22 @@ func (h *sniHandler) Handle(conn net.Conn) {
 		return
 	}
 	conn = &bufferdConn{br: br, Conn: conn}
+	defer conn.Close()
 
 	if hdr[0] != dissector.Handshake {
-		// We assume that it is HTTP request
-		HTTPHandler(h.options...).Handle(conn)
+		// We assume it is an HTTP request
+		req, err := http.ReadRequest(bufio.NewReader(conn))
+		if !req.URL.IsAbs() {
+			req.URL.Scheme = "http" // make sure that the URL is absolute
+		}
+		if err != nil {
+			log.Logf("[sni] %s - %s : %s", conn.RemoteAddr(), conn.LocalAddr(), err)
+			return
+		}
+		HTTPHandler(h.options...).(*httpHandler).handleRequest(conn, req)
 		return
 	}
 
-	defer conn.Close()
-
 	b, host, err := readClientHelloRecord(conn, "", false)
 	if err != nil {
 		log.Log("[sni]", err)