Merge branch 'feature/router'

2024-04-21 12:42:15 +00:00 · 2020-02-17 06:56:59 +08:00
parent 8cd4fe57ba 899d64a92c
commit dd4444b71c
57 changed files with 1336 additions and 2201 deletions
@@ -4,15 +4,14 @@ FROM golang:1.13-alpine AS compiler
 RUN apk add --no-cache git make

 # enable go modules
-WORKDIR /workdir
+WORKDIR /src
 COPY . .

-# do not worry about downloading dependency, sower will fix this.
 RUN CGO_ENABLED=0 make build


 # Build image
 FROM scratch

-COPY --from=compiler /workdir/sower /sower
+COPY --from=compiler /src/sower /sower
 ENTRYPOINT [ "/sower" ]
@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-  <key>Label</key>
-  <string>cc.wweir.sower</string>
-  <key>ProgramArguments</key>
-  <array>
-	  <string>/usr/local/bin/sower</string>
-    <string>-f</string>
-    <string>/usr/local/etc/sower.toml</string>
-  </array>
-  <key>KeepAlive</key>
-  <true/>
-  <key>RunAtLoad</key>
-  <true/>
-</dict>
-</plist>
@@ -1,127 +0,0 @@
-#!/usr/bin/env bash
-set -e
-[[ -d /tmp/sower ]] || mkdir /tmp/sower
-cd /tmp/sower
-
-echo ========    Install sower to your system    ========
-succ_message(){
-	if [[ -z $IP ]]; then
-		IP=127.0.0.1
-	fi
-	echo
-	echo ========    Installed sower to your system    ========
-	echo The config file is: /usr/local/etc/sower.toml
-	echo please set $IP as the first domain name server manually.
-}
-
-# main logic
-VERSION="$(curl -s "https://api.github.com/repos/wweir/sower/releases/latest" | awk -F '"'  '/tag_name/{printf $4}')"
-case "$(uname -s)" in
-	"Darwin")
-		curl -SLf https://github.com/wweir/sower/releases/download/$VERSION/sower-darwin-amd64.tar.gz | tar xzv
-		sudo mkdir -p /usr/local/bin/
-		sudo mv sower /usr/local/bin/
-
-		if [[ -r /usr/local/etc/sower.toml ]]; then
-			echo The config file already exists, keep the original file
-		else
-			printf "Please enter remote server adddress: "
-			read ADDRESS
-			printf "Please enter remote server password (default: 12345678): "
-			read PASSWORD
-			if [[ -z $PASSWORD ]]; then
-				PASSWORD="12345678"
-			fi
-			printf "Please enter which IP do you wanna listen (default: 127.0.0.1):"
-			read IP
-			if [[ -z $IP ]]; then
-				IP="127.0.0.1"
-			fi
-			echo
-
-			sed -i~ "s/# server_addr=\"remote-server/server_addr=\"$ADDRESS/" sower.toml
-			sed -i~ "s/client_ip=\"127.0.0.1\"/client_ip=\"$IP\"/" sower.toml
-			sed -i~ "s/# clear_dns_cache/clear_dns_cache/" sower.toml
-			sed -i~ "s/\"12345678\"/\"$PASSWORD\"/" sower.toml
-			sudo mkdir -p /usr/local/etc/
-			sudo mv sower.toml /usr/local/etc/
-		fi
-
-		echo
-		echo Register auto start service, root privilege is needed!
-		echo
-		sudo mv cc.wweir.sower.plist /Library/LaunchDaemons/
-		sudo chown root:wheel /Library/LaunchDaemons/cc.wweir.sower.plist
-		sudo launchctl load -w /Library/LaunchDaemons/cc.wweir.sower.plist
-		succ_message
-		;;
-
-	"Linux")
-		if [[ "$(cat /proc/1/comm)" != "systemd" ]]; then
-			echo do not support auto deploy on SysVinit
-			exit 1
-		fi
-		printf "Server side or client side, which do you wanna install [c/s]: "
-		read SIDE
-		echo
-
-		case "$SIDE" in
-			"c")
-				curl -SLf https://github.com/wweir/sower/releases/download/$VERSION/sower-linux-amd64.tar.gz | tar xzv
-
-				sudo mv sower /usr/local/bin/
-
-				if [[ -r /usr/local/etc/sower.toml ]]; then
-					echo The config file already exists, keep the original file
-				else
-					printf "Please enter remote server adddress: "
-					read ADDRESS
-					printf "Please enter remote server password (default: 12345678): "
-					read PASSWORD
-					if [[ -z $PASSWORD ]]; then
-						PASSWORD="12345678"
-					fi
-					printf "Please enter which IP do you wanna listen (default: 127.0.0.1):"
-					read IP
-					if [[ -z $IP ]]; then
-						IP="127.0.0.1"
-					fi
-					echo
-
-					sed -i~ "s/# server_addr=\"remote-server/server_addr=\"$ADDRESS/" sower.toml
-					sed -i~ "s/client_ip=\"127.0.0.1\"/client_ip=\"$IP\"/" sower.toml
-					sed -i~ "s/\"12345678\"/\"$PASSWORD\"/" sower.toml
-					sudo mv sower.toml /usr/local/etc/
-				fi
-
-				sudo mv sower-client.service /etc/systemd/system/
-				sudo systemctl enable sower-client
-				sudo systemctl start sower-client
-				succ_message
-				;;
-
-			"s")
-				curl -SLf https://github.com/wweir/sower/releases/download/$VERSION/sower-linux-amd64.tar.gz | tar xzv
-				printf "Please enter remote server password (default: 12345678): "
-				read PASSWORD
-				echo
-				if [[ -z $PASSWORD ]]; then
-					PASSWORD="12345678"
-				fi
-
-				sudo mv sower /usr/local/bin/
-				sed -i~ "s%bin/sower%bin/sower -p $PASSWORD%" sower-server.service
-				sudo mv sower-server.service /etc/systemd/system/
-				sudo systemctl enable sower-server
-				sudo systemctl start sower-server
-				;;
-
-			*)
-				echo "invalid: $SIDE" && exit 1
-				;;
-		esac
-		;;
-	*)
-		echo Do not support auto deploy on this platform.
-		;;
-esac
@@ -1,14 +0,0 @@
-[Unit]
-Description=Sower client service
-After=network.target
-
-[Install]
-WantedBy=multi-user.target
-
-[Service]
-Type=simple
-User=root
-WorkingDirectory=/tmp
-ExecStart=/usr/local/bin/sower -f /usr/local/etc/sower.toml
-RestartSec=3
-Restart=on-failure
@@ -1,14 +0,0 @@
-[Unit]
-Description=Sower server service
-After=network.target
-
-[Install]
-WantedBy=multi-user.target
-
-[Service]
-Type=simple
-User=nobody
-WorkingDirectory=/tmp
-ExecStart=/usr/local/bin/sower -n TCP -v 1
-RestartSec=3
-Restart=on-failure
@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-set -u -x -e
-
-# main logic
-case "$(uname -s)" in
-	"Darwin")
-		sudo launchctl unload /Library/LaunchDaemons/cc.wweir.sower.plist
-		sudo rm -rf /Library/LaunchDaemons/cc.wweir.sower.plist
-		rm -rf /usr/local/bin/sower /usr/local/etc/sower.toml
-		;;
-	"Linux")
-		sudo systemctl disable sower-client ||true
-		sudo systemctl disable sower-server || true
-		sudo rm -rf /etc/systemd/system/sower-client.service /etc/systemd/system/sower-server.service
-		sudo rm -rf /usr/local/bin/sower /usr/local/etc/sower.toml
-		;;
-	*)
-		echo Do not support auto deploy on this platform.
-		;;
-esac
@@ -1,43 +1,12 @@
-export GO111MODULE=on
-SERVER:=127.0.0.1:5533
-
 default: test build

-generate:
-ifeq ("", "$(shell which stringer)")
-	@echo installing generator
-	go get -v golang.org/x/tools/cmd/stringer
-endif
-	go generate ./...
-
 test:
 	go vet ./...
-	go test ./...
+	go list ./... | grep -v internal | xargs go test
 build:
-	go build -ldflags \
-		"-X main.version=$(shell git describe --tags) \
-		 -X main.date=$(shell date +%Y-%m-%d)"
+	go build -ldflags "-w -s \
+		-X conf.version=$(shell git describe --tags) \
+		-X conf.date=$(shell date +%Y-%m-%d)"
 image:
 	docker build -t sower -f .github/Dockerfile .

-kill:
-	sudo pkill -9 sower || true
-
-client: build kill
-	sudo $(PWD)/sower -s 127.0.0.1:5533 -H "127.0.0.1:8080"
-
-server: build
-	$(PWD)/sower -f ''
-
-run: build kill
-	$(PWD)/sower -f '' &
-	sudo $(PWD)/sower -f '' -s 127.0.0.1:5533 -H "127.0.0.1:8080" &
-
-	@sleep 1
-	HTTP_PROXY=http://127.0.0.1:8080 curl http://baidu.com || true
-	@echo
-	HTTPS_PROXY=http://127.0.0.1:8080 curl https://baidu.com || true
-	@echo
-
-	@sleep 1
-	@sudo pkill -9 sower || true
@@ -6,97 +6,82 @@
 [![GitHub star](https://img.shields.io/github/stars/wweir/sower.svg?style=popout)](https://github.com/wweir/sower/stargazers)
 [![GitHub license](https://img.shields.io/github/license/wweir/sower.svg?style=popout)](LICENSE)

+
 中文介绍见 [Wiki](https://github.com/wweir/sower/wiki)

-The sower is a cross-platform intelligent transparent proxy tool base on DNS solution.
+The sower is a cross-platform intelligent transparent proxy tool.

-The first time you visit a new website, sower will detect if the domain in block list and add it in suggect list. So that, you do not need to care about the rules, sower will handle it in a intelligent way.
+The first time you visit a new website, the sower will detect if the domain in the block list and add it in the dynamic detect list. So, you do not need to care about the rules, sower will handle it in an intelligent way.

-If you wanna enjoy the sower, you need to deploy sower on both server and client side.
-On client side, sower listening UDP `53` and TCP `80`/`443` ports, so that you need run it with privileged.
-On server side, it just listening to a port (default `5533`), parse and relay the request to target server.
+Sower provider both http_proxy/https_proxy and dns-based proxy. All these kinds of proxy support intelligent router. You can also port-forward any tcp request to remote, such as: ssh / smtp / pop3.

-Sower also provides an http(s) proxy listening on `:8080` by default. You can turn it off or use another port at any time.
+You are able to enjoy it by setting http_proxy or your DNS without any other settings.
+
+If you already have another proxy solution, you can use it's socks5(h) service as parent proxy to enjoy sower's intelligent router.


 ## Installation
-After Deployed, please check your config file, it is placed in `/usr/local/etc/sower.toml` by default. Here is the example config file [**conf/sower.toml**](https://github.com/wweir/sower/blob/master/conf/sower.toml)
+To enjoy the sower, you need to deploy sower on both server-side and client-side.

-### Auto deploy
-Auto deploy script support Linux server side and masOS/Linux client side.
+Installation script has been integrated into sower. You can install sower as system service by running `./sower -install 'xxx'`

-```shell
-$ bash -c "$(curl -sL https://git.io/JeZzX)"
+## Server
+*If you already have another proxy solution with socks5h support, you can skip server side.*
+
+At server-side, sower run just like a web server proxy.
+It redirect http request to https, and proxy https requests to the setted upstream http service.
+You can use your own certificate or use the auto generated certificate by sower.
+
+What you must set is the upstream http service. You can set it by parameter `-s`, eg:
+``` shell
+# sower -s 127.0.0.1:8080
 ```

-Then modify the configuration file as needed and set `127.0.0.1` as your first domain name server.
-In most situation, you just need to modify `/etc/resolv.conf`.
-
-If you wanna uninstall sower, run:
-
-```shell
-$ bash -c "$(curl -sL https://git.io/JeZz1)"
+## Client
+The easiest way to run it is:
+``` shell
+# sower -c aa.bb.cc # the `aa.bb.cc` can also be `socks5h://127.0.0.1:1080`
 ```
+But a configuration file is recommended to persist dynamic rules in client side.

-### Manually deploy
-1. Download the precompiled file from https://github.com/wweir/sower/releases
-2. Decompression the file into a folder
-3. Run `./sower -h` for help
-5. Config domain name server
-4. Config auto start
+There are 3 kinds of proxy solutions, they are: http(s)_proxy / dns-based proxy / port-forward.

-### Docker deploy
-The auto build docker images are [wweir/sower](https://hub.docker.com/r/wweir/sower).
+### HTTP(S)_PROXY
+An http(s)_proxy listening on `:8080` is setted by deault if you run sower as client mode.

-It is very simple to use it on the server side. Export the port(5533) and run it directly.
+### dns-based proxy
+You can set the `serve_ip` field in `dns` section in configuration file to start dns-based proxy. You should also set the value of `serve_ip` as your default DNS in OS.

-But the client is more troublesome and needs some understanding of the working mechanism of the sower.
+If you want to enjoy the full experience provided by sower, you can take sower as your private DNS on long running server and setting it as your default DNS in you router.
+
+### port-forward
+The port-forward can be only setted in configuration file, you can set it in section `client.router.port_mapping`, eg:
+``` toml
+[client.router.port_mapping]
+":2222"="aa.bb.cc:22"
+```


 ## Architecture
 ```
-          request target servers
-<-------------+              +------------->
-              |              |
-              |              |
-      +------------server-------------+
-      |       | relay service|        |
-      | +-----+---------------------+ |
-      | |                           | |
-      | | parse http(s) target url  | |
-      | |                           | |
-      | +---------------------------+ |
-      |     shadow service            |
-      +--------^----------------------+
-               |           request domain server
-       quic / KCP / TCP         +---------->
-               |                |
-      +--------+---client+------+-----+
-      |                  |            |
-      |  shadow service  |            |
-      |  relay service   |     dns    |
-      |                  |   service  |
-      |                  |            |
-      |       127.0.0.1 or other      |
-      |                  |            |
-      +-^-----^----------+---^----^---+
-        |     |              |    |
-        |     |              |    |   +----->
-http(s) proxy |   +----------+    |   |
-              2   1               1   2
-              +   +               +   +
-         blocked request      normal request
-
+  relay   <--+       +-> target
+http service |       |   service
+     +-------+-------+----+
+     |    sower server    |
+     +----^-------^-------+
+          80     443
+301 http -+       +----- https
+to https          |     service
+               protected
+                by tls
+          socks5  |
+ dns <---+   ^    |  +--> direct
+relay    |   |    |  |   request
+     +---+---+----+--+----+
+     |    sower client    |
+     +----^--^----^---^---+
+          |  |    |   |
+    dns --+  +    +   +-- port
+            80  http(s)  forward
+           443  proxy
 ```
-For more detail, see [透明代理 Sower 技术剖析](https://wweir.cc/post/%E9%80%8F%E6%98%8E%E4%BB%A3%E7%90%86-sower-%E6%8A%80%E6%9C%AF%E5%89%96%E6%9E%90/)
-
-
-## Todo
- [x] authenticate
- [ ] broker(waiting for QUIC implementation to be stable)
- [x] CI/CD
- [x] relay optimization
- [x] deploy script for all normal platform
- [x] dns rule intelligent suggestions
- [x] use socks5 as upstream proxy
- [ ] multi port http_proxy support
@@ -3,128 +3,169 @@ package conf
 import (
 	"flag"
 	"os"
-	"strconv"
+	"sync"
+	"time"

-	"github.com/golang/glog"
 	toml "github.com/pelletier/go-toml"
 	"github.com/wweir/sower/util"
+	"github.com/wweir/utils/log"
 )

-// Conf define the config items
-var Conf = struct {
-	ConfigFile string
-	NetType    string `toml:"net_type"`
-	Cipher     string `toml:"cipher"`
-	Password   string `toml:"password"`
+type client struct {
+	Address string `toml:"address"`

-	ServerPort string `toml:"server_port"`
-	ServerAddr string `toml:"server_addr"`
-	HTTPProxy  string `toml:"http_proxy"`
+	HTTPProxy struct {
+		Address string `toml:"address"`
+	} `toml:"http_proxy"`

-	DNSServer     string `toml:"dns_server"`
-	ClientIP      string `toml:"client_ip"`
-	SuggestLevel  string `toml:"suggest_level"`
-	ClearDNSCache string `toml:"clear_dns_cache"`
+	DNS struct {
+		ServeIP  string `toml:"serve_ip"`
+		Upstream string `toml:"upstream"`
+		FlushCmd string `toml:"flush_cmd"`
+	} `toml:"dns"`

-	BlockList   []string `toml:"blocklist"`
-	WhiteList   []string `toml:"whitelist"`
-	Suggestions []string `toml:"suggestions"`
-	Verbose     int      `toml:"verbose"`
-	VersionOnly bool     `toml:"-"`
-}{}
+	Router struct {
+		PortMapping   map[string]string `toml:"port_mapping"`
+		DetectLevel   int               `toml:"detect_level"`
+		DetectTimeout string            `toml:"detect_timeout"`
+
+		ProxyList    []string `toml:"proxy_list"`
+		DirectList   []string `toml:"direct_list"`
+		DynamicList  []string `toml:"dynamic_list"`
+		directRules  *util.Node
+		proxyRules   *util.Node
+		dynamicRules *util.Node
+	} `toml:"router"`
+}
+type server struct {
+	Upstream  string `toml:"upstream"`
+	CertFile  string `toml:"cert_file"`
+	KeyFile   string `toml:"key_file"`
+	CertEmail string `toml:"cert_email"`
+}
+
+var (
+	version, date string
+
+	flushOnce = sync.Once{}
+	flushMu   = sync.Mutex{}
+	flushCh   = make(chan struct{})
+
+	Server = server{}
+	Client = client{}
+	conf   = struct {
+		file   string
+		Server *server `toml:"server"`
+		Client *client `toml:"client"`
+	}{"", &Server, &Client}
+	Password      string
+	installCmd    string
+	uninstallFlag bool
+)

 func init() {
-	initArgs()
-	if Conf.VersionOnly {
+	flag.StringVar(&Password, "password", "", "password")
+	flag.StringVar(&Server.Upstream, "s", "", "upstream http service, eg: 127.0.0.1:8080")
+	flag.StringVar(&Server.CertFile, "s_cert", "", "tls cert file, gen cert from letsencrypt if empty")
+	flag.StringVar(&Server.KeyFile, "s_key", "", "tls key file, gen cert from letsencrypt if empty")
+	flag.StringVar(&Client.Address, "c", "", "remote server domain, eg: aa.bb.cc, socks5h://127.0.0.1:1080")
+	flag.StringVar(&Client.HTTPProxy.Address, "http_proxy", ":8080", "http proxy, empty to disable")
+	flag.StringVar(&Client.DNS.ServeIP, "dns_ip", "", "upstream dns, eg: 127.0.0.1, disable dns proxy if empty")
+	flag.StringVar(&Client.DNS.Upstream, "dns_upstream", "", "dns relay server ip, dynamic detect if empty")
+	flag.IntVar(&Client.Router.DetectLevel, "level", 2, "dynamic rule detect level: 0~4")
+	flag.StringVar(&Client.Router.DetectTimeout, "timeout", "300ms", "dynamic rule detect timeout")
+	flag.BoolVar(&uninstallFlag, "uninstall", false, "uninstall service")
+	Init() // execute platform init logic
+
+	if !flag.Parsed() {
+		flag.Parse()
+	}
+	if uninstallFlag {
+		uninstall()
+		os.Exit(0)
+	}
+	if installCmd != "" {
+		install()
+		os.Exit(0)
+	}
+
+	var err error
+	defer func() {
+		if timeout, err = time.ParseDuration(Client.Router.DetectTimeout); err != nil {
+			log.Fatalw("parse dynamic detect timeout", "val", Client.Router.DetectTimeout, "err", err)
+		}
+
+		log.Infow("start", "version", version, "date", date, "conf", &conf)
+		passwordData = []byte(Password)
+	}()
+
+	if conf.file == "" {
 		return
 	}

-	if _, err := os.Stat(Conf.ConfigFile); os.IsNotExist(err) {
-		glog.Warningln("no config file has been load:", Conf.ConfigFile)
-		return
-	}
-	for i := range refreshFns {
-		if action, err := refreshFns[i](); err != nil {
-			glog.Fatalln(action+":", err)
+	for i := range loadConfigFns {
+		if err = loadConfigFns[i].fn(); err != nil {
+			log.Fatalw("load config", "config", conf.file, "step", loadConfigFns[i].step, "err", err)
 		}
 	}
-
-	go addSuggestions()
 }

 // refreshFns will be executed while init and write new config
-var refreshFns = []func() (string, error){
-	func() (string, error) {
-		action := "load config"
-		f, err := os.OpenFile(Conf.ConfigFile, os.O_RDONLY, 0644)
-		if err != nil {
-			return action, err
-		}
-		defer f.Close()
-
-		//safe refresh config
-		file := Conf.ConfigFile
-		if err = toml.NewDecoder(f).Decode(&Conf); err != nil {
-			return action, err
-		}
-		Conf.ConfigFile = file
-
-		return action, flag.Set("v", strconv.Itoa(Conf.Verbose))
-	},
-	func() (string, error) {
-		action := "clear dns cache"
-		if Conf.ClearDNSCache != "" {
-			return action, execute(Conf.ClearDNSCache)
-		}
-		return action, nil
-	},
-}
-
-// AddRefreshFn add refreshh function for reload config
-func AddRefreshFn(init bool, fn func() (string, error)) error {
-	if init {
-		if _, err := fn(); err != nil {
-			return err
-		}
+var loadConfigFns = []struct {
+	step string
+	fn   func() error
+}{{"load_config", func() error {
+	f, err := os.OpenFile(conf.file, os.O_RDONLY, 0644)
+	if err != nil {
+		return err
 	}
+	defer f.Close()

-	refreshFns = append(refreshFns, fn)
+	return toml.NewDecoder(f).Decode(&conf)
+
+}}, {"load_rules", func() error {
+	Client.Router.directRules = util.NewNodeFromRules(Client.Router.DirectList...)
+	Client.Router.proxyRules = util.NewNodeFromRules(Client.Router.ProxyList...)
+	Client.Router.dynamicRules = util.NewNodeFromRules(Client.Router.DynamicList...)
 	return nil
-}

-// SuggestCh add domain into suggestios
-var SuggestCh = make(chan string)
+}}, {"flush_dns", func() error {
+	if Client.DNS.FlushCmd != "" {
+		return execute(Client.DNS.FlushCmd)
+	}
+	return nil
+}}}

-// addSuggestions add new domain into suggest rules
-func addSuggestions() {
-	for domain := range SuggestCh {
-		Conf.Suggestions = append(Conf.Suggestions, domain)
-		Conf.Suggestions = util.NewReverseSecSlice(Conf.Suggestions).Sort().Uniq()
-
-		{ // safe write
-			f, err := os.OpenFile(Conf.ConfigFile+"~", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+func flushConf() {
+	for range flushCh {
+		// safe write
+		if conf.file != "" {
+			f, err := os.OpenFile(conf.file+"~", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
 			if err != nil {
-				glog.Errorln(err)
+				log.Errorw("flush config", "step", "flush", "err", err)
 				continue
 			}

-			if err := toml.NewEncoder(f).ArraysWithOneElementPerLine(true).Encode(Conf); err != nil {
-				glog.Errorln(err)
+			flushMu.Lock()
+			if err := toml.NewEncoder(f).ArraysWithOneElementPerLine(true).Encode(conf); err != nil {
+				log.Errorw("flush config", "step", "flush", "err", err)
+				flushMu.Unlock()
 				f.Close()
 				continue
 			}
+			flushMu.Unlock()
 			f.Close()

-			if err = os.Rename(Conf.ConfigFile+"~", Conf.ConfigFile); err != nil {
-				glog.Errorln(err)
+			if err = os.Rename(conf.file+"~", conf.file); err != nil {
+				log.Errorw("flush config", "step", "flush", "err", err)
 				continue
 			}
 		}

 		// reload config
-		for i := range refreshFns {
-			if action, err := refreshFns[i](); err != nil {
-				glog.Errorln(action+":", err)
+		for i := range loadConfigFns {
+			if err := loadConfigFns[i].fn(); err != nil {
+				log.Errorw("flush config", "step", loadConfigFns[i].step, "err", err)
 			}
 		}
 	}
@@ -0,0 +1,73 @@
+// +build darwin
+
+package conf
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"time"
+
+	"github.com/wweir/utils/log"
+)
+
+const svcPath = "/Library/LaunchDaemons/sower.plist"
+const svcFile = `<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>Label</key>
+  <string>sower</string>
+  <key>ProgramArguments</key>
+  <array>
+    <string>/bin/sh</string>
+    <string>-c</string>
+    <string>%s %s</string>
+  </array>
+  <key>KeepAlive</key>
+  <true/>
+  <key>RunAtLoad</key>
+  <true/>
+</dict>
+</plist>`
+
+func Init() {
+	flag.StringVar(&conf.file, "f", "", "config file, rewrite all other parameters if set")
+	flag.StringVar(&Client.DNS.FlushCmd, "flush_dns", "pkill mDNSResponder || true", "flush dns command")
+	flag.StringVar(&installCmd, "install", "", "install service with cmd, eg: '-f /etc/sower/sower.toml'")
+}
+
+func install() {
+	execFile, err := filepath.Abs(os.Args[0])
+	if err != nil {
+		log.Fatalw("get binary path", "err", err)
+	}
+
+	if err := ioutil.WriteFile(svcPath, []byte(fmt.Sprintf(svcFile, execFile, installCmd)), 0644); err != nil {
+		log.Fatalw("write service file", "err", err)
+	}
+
+	execute("launchctl unload " + svcPath)
+	if err := execute("launchctl load -w " + svcPath); err != nil {
+		log.Fatalw("install service", "err", err)
+	}
+}
+func uninstall() {
+	execute("launchctl unload " + svcPath)
+	os.Remove(svcPath)
+	os.RemoveAll("/etc/sower")
+}
+func execute(cmd string) error {
+	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
+	defer cancel()
+
+	out, err := exec.CommandContext(ctx, "sh", "-c", cmd).CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("cmd: %s, err: %s, output: %s", cmd, err, out)
+	}
+	return nil
+}
@@ -0,0 +1,73 @@
+// +build linux
+
+package conf
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"time"
+
+	"github.com/wweir/utils/log"
+)
+
+const svcPath = "/etc/systemd/system/sower.service"
+const svcFile = `[Unit]
+Description=Sower client service
+After=network.target
+
+[Install]
+WantedBy=multi-user.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/tmp
+ExecStart=%s %s
+RestartSec=3
+Restart=on-failure`
+
+func Init() {
+	flag.StringVar(&conf.file, "f", "", "config file, rewrite all other parameters if set")
+	flag.StringVar(&Client.DNS.FlushCmd, "flush_dns", "", "flush dns command")
+	flag.StringVar(&installCmd, "install", "", "install service with cmd, eg: '-f /etc/sower/sower.toml'")
+}
+func install() {
+	execFile, err := filepath.Abs(os.Args[0])
+	if err != nil {
+		log.Fatalw("get binary path", "err", err)
+	}
+
+	if err := ioutil.WriteFile(svcPath, []byte(fmt.Sprintf(svcFile, execFile, installCmd)), 0644); err != nil {
+		log.Fatalw("write service file", "err", err)
+	}
+	if err := execute("systemctl daemon-reload"); err != nil {
+		log.Fatalw("install service", "err", err)
+	}
+	if err := execute("systemctl enable sower"); err != nil {
+		log.Fatalw("install service", "err", err)
+	}
+	if err := execute("systemctl start sower"); err != nil {
+		log.Fatalw("install service", "err", err)
+	}
+}
+func uninstall() {
+	execute("systemctl stop sower")
+	execute("systemctl disable sower")
+	os.Remove(svcPath)
+	os.RemoveAll("/etc/sower")
+}
+func execute(cmd string) error {
+	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
+	defer cancel()
+
+	out, err := exec.CommandContext(ctx, "sh", "-c", cmd).CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("cmd: %s, err: %s, output: %s", cmd, err, out)
+	}
+	return nil
+}
@@ -1,46 +0,0 @@
-// +build !windows
-
-package conf
-
-import (
-	"context"
-	"flag"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"strings"
-	"time"
-
-	"github.com/pkg/errors"
-	"github.com/wweir/sower/dns"
-	"github.com/wweir/sower/proxy/shadow"
-	"github.com/wweir/sower/proxy/transport"
-)
-
-func initArgs() {
-	cfgFile, _ := filepath.Abs(filepath.Join(filepath.Dir(os.Args[0]), "sower.toml"))
-	flag.StringVar(&Conf.ConfigFile, "f", cfgFile, "config file location")
-	flag.StringVar(&Conf.NetType, "n", "TCP", "net type (socks5 client only): "+strings.Join(transport.ListTransports(), ","))
-	flag.StringVar(&Conf.Cipher, "C", "AES_128_GCM", "cipher type: "+strings.Join(shadow.ListCiphers(), ","))
-	flag.StringVar(&Conf.Password, "p", "12345678", "password")
-	flag.StringVar(&Conf.ServerPort, "P", "5533", "server mode listen port")
-	flag.StringVar(&Conf.ServerAddr, "s", "", "server IP (run in CLIENT mode if set)")
-	flag.StringVar(&Conf.HTTPProxy, "H", "", "http proxy listen addr")
-	flag.StringVar(&Conf.DNSServer, "d", "114.114.114.114", "client dns server")
-	flag.StringVar(&Conf.ClientIP, "c", "127.0.0.1", "client dns service redirect IP")
-	flag.StringVar(&Conf.SuggestLevel, "l", "SPEEDUP", "suggest level setting: "+strings.Join(dns.ListSuggestLevels(), ","))
-	flag.BoolVar(&Conf.VersionOnly, "V", false, "print sower version")
-
-	if !flag.Parsed() {
-		flag.Set("logtostderr", "true")
-		flag.Parse()
-	}
-}
-
-func execute(cmd string) error {
-	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
-	defer cancel()
-
-	out, err := exec.CommandContext(ctx, "sh", "-c", Conf.ClearDNSCache).CombinedOutput()
-	return errors.Wrapf(err, "cmd: %s, output: %s, error", Conf.ClearDNSCache, out)
-}
@@ -13,8 +13,7 @@ import (
 	"syscall"
 	"time"

-	"github.com/golang/glog"
-	"github.com/pkg/errors"
+	"github.com/wweir/utils/log"
 	"golang.org/x/sys/windows"
 	"golang.org/x/sys/windows/svc"
 	"golang.org/x/sys/windows/svc/eventlog"
@@ -24,71 +23,33 @@ import (
 const name = "sower"
 const cmdsAccepted = svc.AcceptStop | svc.AcceptShutdown | svc.AcceptPauseAndContinue

-func initArgs() {
-	cfgFile, _ := filepath.Abs(filepath.Join(filepath.Dir(os.Args[0]), "sower.toml"))
-	flag.StringVar(&Conf.ConfigFile, "f", cfgFile, "config file location")
-	flag.BoolVar(&Conf.VersionOnly, "V", false, "print sower version")
-	install := flag.Bool("install", false, "install sower as a service")
-	uninstall := flag.Bool("uninstall", false, "uninstall sower from service list")
-	exePath,_:=filepath.Abs(os.Args[0])
+var execFile, _ = filepath.Abs(os.Args[0])
+var execDir, _ = filepath.Abs(filepath.Dir(execFile))

-	if !flag.Parsed() {
-		os.Mkdir("log", 0755)
-		flag.Set("log_dir", filepath.Dir(os.Args[0])+"/log")
-		flag.Parse()
-	}
+func Init() {
+	flag.StringVar(&conf.file, "f", filepath.Join(execDir, "sower.toml"), "config file, rewrite all other parameters if set")
+	flag.StringVar(&installCmd, "install", "", "install service with cmd")
+	flag.StringVar(&Client.DNS.FlushCmd, "flush_dns", "ipconfig /flushdnss", "flush dns command")
+	flag.Parse()

 	switch {
-	case *install:
-		mgrDo(func(m *mgr.Mgr) error {
-			s, err := m.OpenService(name)
-			if err == nil {
-				s.Close()
-				return fmt.Errorf("service %s already exists", name)
-			}
-			s, err = m.CreateService(name,  exePath, mgr.Config{
-				DisplayName: "Sower Proxy",
-				StartType:   windows.SERVICE_AUTO_START,
-			})
-			if err != nil {
-				return err
-			}
-			defer s.Close()
-			err = eventlog.InstallAsEventCreate(name, eventlog.Error|eventlog.Warning|eventlog.Info)
-			if err != nil {
-				s.Delete()
-				return fmt.Errorf("SetupEventLogSource() failed: %s", err)
-			}
-
-			return s.Start()
-		})
-		os.Exit(0)
-
-	case *uninstall:
-		serviceDo(func(s *mgr.Service) error {
-			err := s.Delete()
-			if err != nil {
-				return err
-			}
-			return eventlog.Remove(name)
-		})
-		os.Exit(0)
-
+	case installCmd != "":
+	case uninstallFlag:
 	default:
 		os.Chdir(filepath.Dir(os.Args[0]))
 		if active, err := svc.IsAnInteractiveSession(); err != nil {
-			glog.Exitf("failed to determine if we are running in an interactive session: %v", err)
+			log.Fatalf("failed to determine if we are running in an interactive session: %v", err)
 		} else if !active {
 			go func() {
 				elog, err := eventlog.Open(name)
 				if err != nil {
-					glog.Exitln(err)
+					log.Fatalw("install service", "err", err)
 				}
 				defer elog.Close()

 				if err := svc.Run(name, &myservice{}); err != nil {
 					elog.Error(1, fmt.Sprintf("%s service failed: %v", name, err))
-					glog.Exitln(err)
+					log.Fatalw("install service", "err", err)
 				}
 				elog.Info(1, fmt.Sprintf("winsvc.RunAsService: %s service stopped", name))
 				os.Exit(0)
@@ -96,7 +57,39 @@ func initArgs() {
 		}
 	}
 }
+func install() {
+	mgrDo(func(m *mgr.Mgr) error {
+		s, err := m.OpenService(name)
+		if err == nil {
+			s.Close()
+			return fmt.Errorf("service %s already exists", name)
+		}
+		s, err = m.CreateService(name, execFile, mgr.Config{
+			DisplayName: "Sower Proxy",
+			StartType:   windows.SERVICE_AUTO_START,
+		})
+		if err != nil {
+			return err
+		}
+		defer s.Close()
+		err = eventlog.InstallAsEventCreate(name, eventlog.Error|eventlog.Warning|eventlog.Info)
+		if err != nil {
+			s.Delete()
+			return fmt.Errorf("SetupEventLogSource() failed: %s", err)
+		}

+		return s.Start()
+	})
+}
+func uninstall() {
+	serviceDo(func(s *mgr.Service) error {
+		err := s.Delete()
+		if err != nil {
+			return err
+		}
+		return eventlog.Remove(name)
+	})
+}
 func serviceDo(fn func(*mgr.Service) error) {
 	mgrDo(func(m *mgr.Mgr) error {
 		s, err := m.OpenService(name)
@@ -110,12 +103,12 @@ func serviceDo(fn func(*mgr.Service) error) {
 func mgrDo(fn func(m *mgr.Mgr) error) {
 	m, err := mgr.Connect()
 	if err != nil {
-		glog.Exitln(err)
+		log.Fatalw("install service", "err", err)
 	}
 	defer m.Disconnect()

 	if err := fn(m); err != nil {
-		glog.Fatalln(err)
+		log.Fatalw("install service", "err", err)
 	}
 }

@@ -124,7 +117,7 @@ type myservice struct{}
 func (m *myservice) Execute(args []string, r <-chan svc.ChangeRequest, changes chan<- svc.Status) (ssec bool, errno uint32) {
 	elog, err := eventlog.Open(name)
 	if err != nil {
-		glog.Errorln(err)
+		log.Errorw("install service", "err", err)
 		return
 	}
 	defer elog.Close()
@@ -158,7 +151,7 @@ func execute(cmd string) error {
 	defer cancel()

 	var cmds []string
-	for _, cmd := range strings.Split(Conf.ClearDNSCache, " ") {
+	for _, cmd := range strings.Split(Client.DNS.FlushCmd, " ") {
 		if cmd == "" {
 			continue
 		}
@@ -174,6 +167,8 @@ func execute(cmd string) error {

 	command := exec.CommandContext(ctx, cmds[0], cmds[1:]...)
 	command.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
-	out, err := command.CombinedOutput()
-	return errors.Wrapf(err, "cmd: %s, output: %s, error", Conf.ClearDNSCache, out)
+	if out, err := command.CombinedOutput(); err != nil {
+		return fmt.Errorf("cmd: %s, output: %s, err: %w", Client.DNS.FlushCmd, out, err)
+	}
+	return nil
 }
@@ -0,0 +1,142 @@
+package conf
+
+import (
+	"crypto/tls"
+	"net"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/wweir/sower/internal/http"
+	"github.com/wweir/sower/internal/socks5"
+	"github.com/wweir/sower/util"
+	"github.com/wweir/utils/log"
+	"github.com/wweir/utils/mem"
+)
+
+type dynamic struct {
+	port http.Port
+}
+
+var cache = mem.New(2 * time.Hour)
+var detect = &dynamic{}
+var passwordData []byte
+var timeout time.Duration
+
+// ShouldProxy check if the domain shoule request though proxy
+func ShouldProxy(domain string) bool {
+	if domain == Client.Address {
+		return true
+	}
+	if Client.Router.directRules.Match(domain) {
+		return false
+	}
+	if Client.Router.proxyRules.Match(domain) {
+		return true
+	}
+	if Client.Router.dynamicRules.Match(domain) {
+		return true
+	}
+
+	cache.Remember(detect, domain)
+	return Client.Router.dynamicRules.Match(domain)
+}
+
+func (d *dynamic) Get(key interface{}) (err error) {
+	// break deadloop, for ugly wildcard setting dns setting
+	domain := strings.TrimSuffix(key.(string), ".")
+	if strings.Count(domain, ".") > 10 {
+		return nil
+	}
+
+	wg := sync.WaitGroup{}
+	httpScore, httpsScore := new(int32), new(int32)
+	for _, ping := range [...]dynamic{{port: http.HTTP}, {port: http.HTTPS}} {
+		wg.Add(1)
+		go func(ping dynamic) {
+			defer wg.Done()
+
+			if err := ping.port.Ping(domain, timeout); err != nil {
+				return
+			}
+
+			switch ping.port {
+			case http.HTTP:
+				if !atomic.CompareAndSwapInt32(httpScore, 0, 2) {
+					atomic.AddInt32(httpScore, 1)
+				}
+			case http.HTTPS:
+				if !atomic.CompareAndSwapInt32(httpsScore, 0, 2) {
+					atomic.AddInt32(httpScore, 1)
+				}
+			}
+		}(ping)
+	}
+	for _, ping := range [...]dynamic{{port: http.HTTP}, {port: http.HTTPS}} {
+		wg.Add(1)
+		go func(ping dynamic) {
+			defer wg.Done()
+
+			var conn net.Conn
+			if addr, ok := socks5.IsSocks5Schema(Client.Address); ok {
+				conn, err = net.Dial("tcp", addr)
+				conn = socks5.ToSocks5(conn, domain, uint16(ping.port))
+
+			} else {
+				conn, err = tls.Dial("tcp", net.JoinHostPort(Client.Address, "443"), &tls.Config{})
+				if ping.port == http.HTTP {
+					conn = http.NewTgtConn(conn, passwordData, http.TGT_HTTP, "", 80)
+				} else {
+					conn = http.NewTgtConn(conn, passwordData, http.TGT_HTTPS, "", 443)
+				}
+			}
+			if err != nil {
+				log.Errorw("sower dial", "addr", Client.Address, "err", err)
+				return
+			}
+
+			if err := ping.port.PingWithConn(domain, conn, timeout); err != nil {
+				return
+			}
+
+			switch ping.port {
+			case http.HTTP:
+				if !atomic.CompareAndSwapInt32(httpScore, 0, -2) {
+					atomic.AddInt32(httpScore, -1)
+				}
+			case http.HTTPS:
+				if !atomic.CompareAndSwapInt32(httpsScore, 0, -2) {
+					atomic.AddInt32(httpScore, -1)
+				}
+			}
+		}(ping)
+	}
+
+	wg.Wait()
+	if int(*httpScore+*httpsScore)+conf.Client.Router.DetectLevel < 0 {
+		addDynamic(domain)
+		log.Infow("add rule", "domain", domain, "http_score", *httpScore, "https_score", *httpsScore)
+	}
+	return nil
+}
+
+// addDynamic add new domain into dynamic list
+func addDynamic(domain string) {
+	flushMu.Lock()
+	Client.Router.DynamicList = util.NewReverseSecSlice(
+		append(Client.Router.DynamicList, domain)).Sort().Uniq()
+	Client.Router.dynamicRules = util.NewNodeFromRules(Client.Router.DynamicList...)
+	flushMu.Unlock()
+
+	flushOnce.Do(func() {
+		if conf.file != "" {
+			go flushConf()
+		}
+	})
+
+	select {
+	case flushCh <- struct{}{}:
+	default:
+	}
+}
@@ -1,51 +1,57 @@
-net_type="TCP"       # TCP, KCP, QUIC, SOCKS5(client only)
-cipher="AES_128_GCM" # AES_128_GCM, AES_192_GCM, AES_256_GCM, CHACHA20_IETF_POLY1305, XCHACHA20_IETF_POLY1305
-password="12345678"
-server_port="5533"
-# server_addr="remote-server"   # replce it to remote server
-http_proxy=":8080"              # eg: 192.168.0.2:8080
-dns_server=""                   # eg: 223.5.5.5:53, Keep empty for dynamic setting from net env
-client_ip="127.0.0.1"           # listen the IP, dns target is the IP
-# clear_dns_cache="pkill mDNSResponder || true"   # Windows: "ipconfig /flushdnss"
-suggest_level="SPEEDUP"         # DISABLE, BLOCK, SPEEDUP
-blocklist=[
-    "**.google.*", # google
-    "**.goo.gl",
-    "**.googleusercontent.com",
-    "**.googleapis.com",
-    "*.googlesource.com",
-    "**.youtube.com", # youtube
-    "**.ytimg.com",
-    "**.ggpht.com",
-    "**.googlevideo.com",
-    "**.facebook.com", # facebook
-    "**.fbcdn.net",
-    "**.twitter.com", # twitter
-    "**.twimg.com",
-    "**.blogspot.com", # blogspot
-    "**.appspot.com",
-    "**.wikipedia.org", # wikipeida
-    "*.cloudfront.net",
-    "**.amazon.com",
-    "**.amazonaws.com",
-    "*.githubusercontent.com",
-    "*.github.*",
-]
-whitelist=[
-    "**.in-addr.arpa",
-    "imap.*.*",
-    "imap.*.*.*",
-    "smtp.*.*",
-    "smtp.*.*.*",
-    "pop.*.*",
-    "pop.*.*.*",
-    "imap-mail.outlook.com",
-    "**.qq.com",
-    "**.baidu.com",
-    "*.aliyun.com",
-    "**.cn",
-    "**.icloud.com",
-    "**.163.com",
-    "**.weiyun.com",
-]
-verbose=0
+[client]
+  address = "" # aa.bb.cc, socks5h://127.0.0.1:1080
+
+  [client.dns]
+    flush_cmd="" # macOS: pkill mDNSResponder || true, Windows: ipconfig /flushdnss
+    serve_ip = "127.0.0.1"
+    upstream = "" # empty to dynamic detect
+
+  [client.http_proxy]
+    address = ":8080" # empty to disable http_proxy
+
+  [client.router]
+    detect_level = 2 # 0~4, the bigger the harder to add
+    detect_timeout = "300ms"
+    direct_list = [
+      "**.in-addr.arpa",
+      "imap.*.*",
+      "imap.*.*.*",
+      "smtp.*.*",
+      "smtp.*.*.*",
+      "pop.*.*",
+      "pop.*.*.*",
+      "**.cn",
+    ]
+    dynamic_list = []
+    proxy_list = [
+      "**.google.*",
+      "**.goo.gl",
+      "**.googleusercontent.com",
+      "**.googleapis.com",
+      "*.googlesource.com",
+      "**.youtube.com",
+      "**.ytimg.com",
+      "**.ggpht.com",
+      "**.googlevideo.com",
+      "**.facebook.com",
+      "**.fbcdn.net",
+      "**.twitter.com",
+      "**.twimg.com",
+      "**.blogspot.com",
+      "**.appspot.com",
+      "**.wikipedia.org",
+      "*.cloudfront.net",
+      "**.amazon.com",
+      "**.amazonaws.com",
+      "*.githubusercontent.com",
+      "*.github.*",
+    ]
+
+    [client.router.port_mapping]
+      # ":2222"="aa.bb.cc:22"
+
+[server]
+  cert_email = "" # eg: user@aa.bb.cc
+  cert_file = "" # eg: /etc/ssl/server.crt
+  key_file = "" # eg: /etc/ssl/server.key
+  upstream = "" # eg: 127.0.0.1:8080
@@ -1,22 +0,0 @@
-package dns
-
-import (
-	"runtime"
-	"testing"
-)
-
-func TestGetDefaultDNSServer(t *testing.T) {
-	switch runtime.GOOS {
-	case "windows":
-	case "darwin":
-	default:
-		t.Skip("skip for some enviroment not support dhcp and permission set")
-		return
-	}
-
-	if got, err := GetDefaultDNSServer(); err != nil {
-		t.Errorf("GetDefaultDNSServer() return error: %s", err)
-	} else {
-		t.Logf("GetDefaultDNSServer() return IP: %v", got)
-	}
-}
@@ -1,205 +0,0 @@
-package dns
-
-import (
-	"context"
-	"net"
-	"strings"
-	"sync/atomic"
-	"time"
-
-	"github.com/golang/glog"
-	"github.com/miekg/dns"
-	mem "github.com/wweir/mem-go"
-	"github.com/wweir/sower/util"
-)
-
-const colon = byte(':')
-
-func StartDNS(dnsServer, listenIP string, suggestCh chan<- string, level string) {
-	ip := net.ParseIP(listenIP)
-
-	suggest := &intelliSuggest{suggestCh, parseSuggestLevel(level), listenIP, time.Second}
-	mem.DefaultCache = mem.New(time.Hour)
-
-	dhcpCh := make(chan struct{})
-	if dnsServer != "" {
-		if _, _, err := net.SplitHostPort(dnsServer); err != nil {
-			dnsServer = net.JoinHostPort(dnsServer, "53")
-		}
-	} else {
-		go dynamicSetUpstreamDNS(listenIP, &dnsServer, dhcpCh)
-		dhcpCh <- struct{}{}
-	}
-
-	dns.HandleFunc(".", func(w dns.ResponseWriter, r *dns.Msg) {
-		// *Msg r has an TSIG record and it was validated
-		if r.IsTsig() != nil && w.TsigStatus() == nil {
-			lastTsig := r.Extra[len(r.Extra)-1].(*dns.TSIG)
-			r.SetTsig(lastTsig.Hdr.Name, dns.HmacMD5, 300, time.Now().Unix())
-		}
-
-		//https://stackoverflow.com/questions/4082081/requesting-a-and-aaaa-records-in-single-dns-query/4083071#4083071
-		if len(r.Question) == 0 {
-			return
-		}
-
-		domain := r.Question[0].Name
-		if idx := strings.IndexByte(domain, colon); idx > 0 {
-			domain = domain[:idx] // trim port
-		}
-
-		matchAndServe(w, r, domain, listenIP, dnsServer, dhcpCh, ip, suggest)
-	})
-
-	server := &dns.Server{Addr: net.JoinHostPort(listenIP, "53"), Net: "udp"}
-	glog.Fatalln(server.ListenAndServe())
-}
-
-func dynamicSetUpstreamDNS(listenIP string, dnsServer *string, dhcpCh <-chan struct{}) {
-	addr, _ := dns.ReverseAddr(listenIP)
-	msg := &dns.Msg{
-		MsgHdr: dns.MsgHdr{
-			Id:               dns.Id(),
-			RecursionDesired: false,
-		},
-		Question: []dns.Question{{
-			Name:   addr,
-			Qtype:  dns.TypeA,
-			Qclass: dns.ClassINET,
-		}},
-	}
-
-	for {
-		<-dhcpCh
-		if _, err := dns.Exchange(msg, *dnsServer); err == nil {
-			continue
-		}
-
-		host, err := GetDefaultDNSServer()
-		if err != nil {
-			glog.Errorln(err)
-			continue
-		}
-
-		// atomic action
-		*dnsServer = net.JoinHostPort(host, "53")
-		glog.Infoln("set dns server to", host)
-	}
-}
-func matchAndServe(w dns.ResponseWriter, r *dns.Msg, domain, listenIP, dnsServer string,
-	dhcpCh chan struct{}, ipNet net.IP, suggest *intelliSuggest) {
-
-	inWriteList := whiteList.Match(domain)
-	if !inWriteList && (blockList.Match(domain) || suggestList.Match(domain)) {
-		glog.V(2).Infof("match %s suss", domain)
-		w.WriteMsg(localA(r, domain, ipNet))
-		return
-	}
-
-	go mem.Remember(suggest, domain)
-	ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
-	defer cancel()
-
-	msg, err := dns.ExchangeContext(ctx, r, dnsServer)
-	if err != nil {
-		if dhcpCh != nil {
-			select {
-			case dhcpCh <- struct{}{}:
-			default:
-			}
-		}
-		glog.V(1).Infof("get dns of %s from %s fail: %s", domain, dnsServer, err)
-		return
-	} else if msg == nil { // expose any response except nil
-		glog.V(1).Infof("get dns of %s from %s return empty", domain, dnsServer)
-		return
-	}
-
-	w.WriteMsg(msg)
-}
-
-type intelliSuggest struct {
-	suggestCh chan<- string
-	level     level
-	listenIP  string
-	timeout   time.Duration
-}
-
-func (i *intelliSuggest) GetOne(key interface{}) (iface interface{}, e error) {
-	iface, e = struct{}{}, nil
-	if i.level == DISABLE {
-		return
-	}
-
-	// kill deadloop, for ugly wildcard setting dns setting
-	domain := strings.TrimSuffix(key.(string), ".")
-	if strings.Count(domain, ".") > 10 {
-		return
-	}
-
-	ip, err := net.LookupIP(domain)
-	if err != nil || len(ip) == 0 {
-		glog.V(1).Infoln(domain, ip, err)
-		return
-	}
-
-	var (
-		pings = [...]struct {
-			viaAddr string
-			port    util.Port
-		}{
-			{ip[0].String(), util.HTTP},
-			{i.listenIP, util.HTTP},
-			{ip[0].String(), util.HTTPS},
-			{i.listenIP, util.HTTPS},
-		}
-		protos = [...]*int32{
-			new(int32), /*HTTP*/
-			new(int32), /*HTTPS*/
-		}
-		score = new(int32)
-	)
-	for idx := range pings {
-		go func(idx int) {
-			if err := util.HTTPPing(pings[idx].viaAddr, domain, pings[idx].port, i.timeout); err != nil {
-				// local ping fail
-				if pings[idx].viaAddr == i.listenIP {
-					atomic.AddInt32(score, -1)
-					glog.V(1).Infof("remote ping %s fail", domain)
-				} else {
-					atomic.AddInt32(score, 1)
-					glog.V(1).Infof("local ping %s fail", domain)
-				}
-
-				// remote ping faster
-			} else if pings[idx].viaAddr == i.listenIP {
-				if atomic.CompareAndSwapInt32(protos[idx/2], 0, 1) && i.level == SPEEDUP {
-					atomic.AddInt32(score, 1)
-				}
-				glog.V(1).Infof("remote ping %s faster", domain)
-
-			} else {
-				atomic.CompareAndSwapInt32(protos[idx/2], 0, 2)
-				return // score change trigger add suggestion
-			}
-
-			// check all remote pings are faster
-			if atomic.LoadInt32(score) == int32(len(protos)) {
-				for i := range protos {
-					if atomic.LoadInt32(protos[i]) != 1 {
-						return
-					}
-				}
-			}
-
-			// 1. local fail and remote success
-			// 2. all remote pings are faster
-			if atomic.LoadInt32(score) >= int32(len(protos)) {
-				old := atomic.SwapInt32(score, -1) // avoid readd the suggestion
-				i.suggestCh <- domain
-				glog.Infof("suggested domain: %s with score: %d", domain, old)
-			}
-		}(idx)
-	}
-	return
-}
@@ -1,16 +0,0 @@
-// Code generated by "stringer -type=level util.go"; DO NOT EDIT.
-
-package dns
-
-import "strconv"
-
-const _level_name = "DISABLEBLOCKSPEEDUPlevelEnd"
-
-var _level_index = [...]uint8{0, 7, 12, 19, 27}
-
-func (i level) String() string {
-	if i < 0 || i >= level(len(_level_index)-1) {
-		return "level(" + strconv.FormatInt(int64(i), 10) + ")"
-	}
-	return _level_name[_level_index[i]:_level_index[i+1]]
-}
@@ -1,76 +0,0 @@
-package dns
-
-import (
-	"net"
-
-	"github.com/golang/glog"
-	"github.com/miekg/dns"
-	"github.com/wweir/sower/util"
-)
-
-var (
-	blockList   *util.Node
-	suggestList *util.Node
-	whiteList   *util.Node
-)
-
-// LoadRules init rules from config
-func LoadRules(blocklist, suggestions, whitelist []string, host string) {
-	blockList = loadRules("block", blocklist)
-	suggestList = loadRules("suggest", suggestions)
-	whiteList = loadRules("white", whitelist)
-	whiteList.Add(host)
-	glog.V(1).Infoln("reloaded config")
-}
-
-func loadRules(name string, list []string) *util.Node {
-	rule := util.NewNodeFromRules(".", list...)
-	glog.V(3).Infof("load %s rule:\n%s", name, rule)
-	return rule
-}
-
-func localA(r *dns.Msg, domain string, localIP net.IP) *dns.Msg {
-	m := new(dns.Msg)
-	m.SetReply(r)
-	if localIP.To4() != nil {
-		m.Answer = []dns.RR{&dns.A{
-			Hdr: dns.RR_Header{Name: domain, Rrtype: dns.TypeA, Class: dns.ClassINET, Ttl: 20},
-			A:   localIP,
-		}}
-	} else {
-		m.Answer = []dns.RR{&dns.AAAA{
-			Hdr:  dns.RR_Header{Name: domain, Rrtype: dns.TypeAAAA, Class: dns.ClassINET, Ttl: 20},
-			AAAA: localIP,
-		}}
-	}
-	return m
-}
-
-//go:generate stringer -type=level $GOFILE
-type level int32
-
-const (
-	DISABLE level = iota
-	BLOCK
-	SPEEDUP
-	levelEnd
-)
-
-func ListSuggestLevels() []string {
-	list := make([]string, 0, int(levelEnd))
-	for i := level(0); i < levelEnd; i++ {
-		list = append(list, i.String())
-	}
-	return list
-}
-
-func parseSuggestLevel(suggestLevel string) level {
-	for i := level(0); i < levelEnd; i++ {
-		if suggestLevel == i.String() {
-			return i
-		}
-	}
-
-	glog.Exitln("invalid suggest level: " + suggestLevel)
-	return levelEnd
-}
@@ -3,25 +3,12 @@ module github.com/wweir/sower
 go 1.13

 require (
-	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/guregu/null v3.4.0+incompatible // indirect
-	github.com/klauspost/cpuid v1.2.1 // indirect
-	github.com/klauspost/reedsolomon v1.9.2 // indirect
 	github.com/krolaw/dhcp4 v0.0.0-20190909130307-a50d88189771
-	github.com/lib/pq v1.2.0 // indirect
 	github.com/libp2p/go-reuseport v0.0.1
-	github.com/lucas-clemente/quic-go v0.12.0
-	github.com/miekg/dns v1.1.18
-	github.com/pelletier/go-toml v1.4.0
-	github.com/pkg/errors v0.8.1
-	github.com/satori/go.uuid v1.2.0 // indirect
-	github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161 // indirect
-	github.com/templexxx/xor v0.0.0-20181023030647-4e92f724b73b // indirect
-	github.com/tjfoc/gmsm v1.0.1 // indirect
-	github.com/ulule/deepcopier v0.0.0-20171107155558-ca99b135e50f // indirect
-	github.com/wweir/mem-go v0.0.0-20190109100331-8673ab596296
-	github.com/xtaci/kcp-go v5.4.10+incompatible
-	github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae // indirect
-	golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392
-	golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe
+	github.com/miekg/dns v1.1.27
+	github.com/pelletier/go-toml v1.6.0
+	github.com/pkg/errors v0.9.1
+	github.com/wweir/utils v0.0.0-20200214114658-f6f356a08736
+	golang.org/x/crypto v0.0.0-20200214034016-1d94cc7ab1c6
+	golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4
 )
@@ -1,110 +1,100 @@
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
-github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/mock v1.2.0 h1:28o5sBqPkBsMGnC6b4MvE2TzSr5/AT4c/1fLqVGIwlk=
-github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.0 h1:kbxbvI4Un1LUWKxufD+BiE6AEExYYgkQLQmLFqA1LFk=
-github.com/golang/protobuf v1.3.0/go.mod h1:Qd/q+1AKNOZr9uGQzbzCmRO6sUih6GTPZv6a1/R87v0=
+github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
+github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
+github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/guregu/null v3.4.0+incompatible h1:a4mw37gBO7ypcBlTJeZGuMpSxxFTV9qFfFKgWxQSGaM=
 github.com/guregu/null v3.4.0+incompatible/go.mod h1:ePGpQaN9cw0tj45IR5E5ehMvsFlLlQZAkkOXZurJ3NM=
-github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
-github.com/klauspost/cpuid v1.2.1 h1:vJi+O/nMdFt0vqm8NZBI6wzALWdA2X+egi0ogNyrC/w=
-github.com/klauspost/cpuid v1.2.1/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
-github.com/klauspost/reedsolomon v1.9.2 h1:E9CMS2Pqbv+C7tsrYad4YC9MfhnMVWhMRsTi7U0UB18=
-github.com/klauspost/reedsolomon v1.9.2/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4=
+github.com/influxdata/influxdb v1.7.9/go.mod h1:qZna6X/4elxqT3yI9iZYdZrWWdeFOOprn86kgg4+IzY=
+github.com/jmoiron/sqlx v1.2.0/go.mod h1:1FEQNm3xlJgrMD+FBdI9+xvCksHtbpVBBw5dYhBSsks=
+github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/krolaw/dhcp4 v0.0.0-20190909130307-a50d88189771 h1:t2c2B9g1ZVhMYduqmANSEGVD3/1WlsrEYNPtVoFlENk=
 github.com/krolaw/dhcp4 v0.0.0-20190909130307-a50d88189771/go.mod h1:0AqAH3ZogsCrvrtUpvc6EtVKbc3w6xwZhkvGLuqyi3o=
-github.com/lib/pq v1.2.0 h1:LXpIM/LZ5xGFhOpXAQUIMM1HdyqzVYM13zNdjCEEcA0=
-github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
+github.com/lib/pq v1.0.0 h1:X5PMW56eZitiTeO7tKzZxFCSpbFZJtkMMooicw2us9A=
+github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/libp2p/go-reuseport v0.0.1 h1:7PhkfH73VXfPJYKQ6JwS5I/eVcoyYi9IMNGc6FWpFLw=
 github.com/libp2p/go-reuseport v0.0.1/go.mod h1:jn6RmB1ufnQwl0Q1f+YxAj8isJgDCQzaaxIFYDhcYEA=
-github.com/lucas-clemente/quic-go v0.12.0 h1:TRbvZ6F++sofeGbh+Z2IIyIOhl8KyGnYuA06g2yrHdI=
-github.com/lucas-clemente/quic-go v0.12.0/go.mod h1:UXJJPE4RfFef/xPO5wQm0tITK8gNfqwTxjbE7s3Vb8s=
-github.com/marten-seemann/qpack v0.1.0/go.mod h1:LFt1NU/Ptjip0C2CPkhimBz5CGE3WGDAUWqna+CNTrI=
-github.com/marten-seemann/qtls v0.3.2 h1:O7awy4bHEzSX/K3h+fZig3/Vo03s/RxlxgsAk9sYamI=
-github.com/marten-seemann/qtls v0.3.2/go.mod h1:xzjG7avBwGGbdZ8dTGxlBnLArsVKLvwmjgmPuiQEcYk=
-github.com/miekg/dns v1.1.18 h1:S82KA03bsvMvziY41d0WitiplMCt8QhawbSQLtoqsdI=
-github.com/miekg/dns v1.1.18/go.mod h1:WgzbA6oji13JREwiNsRDNfl7jYdPnmz+VEuLrA+/48M=
-github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/ginkgo v1.7.0 h1:WSHQ+IS43OoUrWtD1/bbclrwK8TTH5hzp+umCiuxHgs=
-github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/gomega v1.4.3 h1:RE1xgDvH7imwFD45h+u2SgIfERHlS2yNG4DObb5BSKU=
-github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/pelletier/go-toml v1.4.0 h1:u3Z1r+oOXJIkxqw34zVhyPgjBsm6X2wn21NWs/HfSeg=
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@@ -1,4 +1,4 @@
-package util
+package http

 import (
 	"bytes"
@@ -6,49 +6,46 @@ import (
 	"encoding/binary"
 	"io"
 	"net"
+	"strconv"
 	"time"
 )

-// HTTPPing try connect to a http(s) server with domain though the http addr
-func HTTPPing(viaHost, domain string, port Port, timeout time.Duration) (err error) {
-	conn, err := net.DialTimeout("tcp", port.JoinAddr(viaHost), timeout)
+// Port ==========================
+type Port uint16
+
+const HTTP Port = 80
+const HTTPS Port = 443
+
+// Ping try connect to a http(s) server with domain though the http addr
+func (p Port) Ping(domain string, timeout time.Duration) error {
+	conn, err := net.DialTimeout("tcp", net.JoinHostPort(domain, p.String()), timeout)
 	if err != nil {
 		return err
 	}
 	defer conn.Close()

+	return p.PingWithConn(domain, conn, timeout)
+}
+
+// PingWithConn try connect to a http(s) server with domain though the http addr
+func (p Port) PingWithConn(domain string, conn net.Conn, timeout time.Duration) error {
 	conn.SetDeadline(time.Now().Add(timeout))
-	if _, err = conn.Write(port.PingMsg(domain)); err != nil {
+	if _, err := conn.Write(p.PingMsg(domain)); err != nil {
 		return err
 	}

 	// err -> nil:		read something succ
 	// err -> io.EOF:	no such domain or connection refused
 	// err -> timeout:	tcp package has been dropped
-	_, err = conn.Read(make([]byte, 1))
-	if err == io.EOF && viaHost == domain {
+	_, err := conn.Read(make([]byte, 1))
+	if err == nil || err == io.EOF {
 		return nil
 	}
 	return err
 }

-// Port ==========================
-type Port uint16
-
-const (
-	HTTP Port = iota
-	HTTPS
-)
-
-func (p Port) JoinAddr(addr string) string {
-	switch p {
-	case HTTP:
-		return addr + ":80"
-	case HTTPS:
-		return addr + ":443"
-	default:
-		panic("invalid port")
-	}
+func (p Port) String() string {
+	return strconv.Itoa(int(p))
 }

 func (p Port) PingMsg(domain string) []byte {
@@ -0,0 +1,142 @@
+package http
+
+import (
+	"bufio"
+	"crypto/md5"
+	"encoding/binary"
+	"errors"
+	"io"
+	"net"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/wweir/sower/util"
+)
+
+const (
+	TGT_OTHER byte = iota
+	TGT_HTTP
+	TGT_HTTPS
+)
+
+// Write Addr
+type conn struct {
+	typ      byte
+	password []byte
+	domain   []byte
+	port     uint16
+	init     bool
+	net.Conn
+}
+
+func NewTgtConn(c net.Conn, password []byte, tgtType byte, domain string, port uint16) net.Conn {
+	return &conn{
+		typ:      tgtType,
+		password: password,
+		domain:   []byte(domain),
+		port:     port,
+		init:     true,
+		Conn:     c,
+	}
+}
+
+// other => type + checksum + port + domain_length ++ domain + data
+// http  => type + checksum ++ data
+// https => type + checksum + port ++ data
+type header struct {
+	Type         byte
+	Checksum     byte
+	Port         uint16
+	DomainLength uint8
+}
+
+func (c *conn) Write(b []byte) (n int, err error) {
+	if c.init {
+		c.init = false
+		domainLength := byte(len(c.domain))
+		if err := binary.Write(c.Conn, binary.BigEndian, &header{
+			Type:         c.typ,
+			Checksum:     checksum(c.password, c.port, domainLength),
+			Port:         c.port,
+			DomainLength: domainLength,
+		}); err != nil {
+			return 0, err
+		}
+
+		n, err := c.Conn.Write(append(c.domain, b...))
+		return n - len(c.domain), err
+	}
+
+	return c.Conn.Write(b)
+}
+
+// ParseAddr parse target addr from net.Conn
+func ParseAddr(conn net.Conn, password []byte) (_ net.Conn, domain string, port uint16, err error) {
+	teeConn := &util.TeeConn{Conn: conn}
+	teeConn.StartOrReset()
+	defer teeConn.Stop()
+
+	head := new(header)
+	if err = binary.Read(conn, binary.BigEndian, head); err != nil {
+		return teeConn, "", 0, nil
+	}
+	if head.Checksum != checksum(password, head.Port, head.DomainLength) {
+		return teeConn, "", 0, nil
+	}
+
+	switch head.Type {
+	case TGT_OTHER:
+		buf := make([]byte, int(head.DomainLength))
+		if _, err = io.ReadFull(conn, buf); err != nil {
+			return teeConn, "", 0, err
+		}
+
+		return teeConn, string(buf), head.Port, nil
+
+	case TGT_HTTP:
+		teeConn.DropAndRestart()
+		return ParseHTTP(teeConn)
+
+	case TGT_HTTPS:
+		teeConn.DropAndRestart()
+		conn, domain, err = ParseHTTPS(teeConn)
+		return conn, domain, head.Port, err
+
+	default:
+		return teeConn, "", 0, errors.New("invalid request")
+	}
+}
+func ParseHTTP(teeConn net.Conn) (_ net.Conn, domain string, port uint16, err error) {
+	resp, err := http.ReadRequest(bufio.NewReader(teeConn))
+	if err != nil {
+		return teeConn, "", 0, err
+	}
+
+	idx := strings.LastIndex(resp.Host, ":")
+	if idx == -1 {
+		return teeConn, resp.Host, 80, nil
+	}
+
+	p, err := strconv.ParseUint(resp.Host[idx+1:], 10, 16)
+	if err != nil {
+		return teeConn, "", 0, err
+	}
+	return teeConn, resp.Host[:idx], uint16(p), nil
+}
+func ParseHTTPS(teeConn net.Conn) (_ net.Conn, domain string, err error) {
+	if domain, _, err = extractSNI(teeConn); err != nil {
+		return nil, "", err
+	}
+	return teeConn, domain, nil
+}
+
+var errChecksum = errors.New("invalid checksum")
+
+func checksum(password []byte, port uint16, length uint8) (val byte) {
+	nums := md5.Sum(append(password, byte(port), length))
+	for _, b := range nums {
+		val += b
+	}
+	return val
+}
@@ -0,0 +1,66 @@
+package http
+
+import (
+	"bufio"
+	"bytes"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"testing"
+)
+
+func TestParseAddr1(t *testing.T) {
+	c1, c2 := net.Pipe()
+
+	go func() {
+		c1 = NewTgtConn(c1, nil, TGT_HTTP, "", 0)
+		req, _ := http.NewRequest("GET", "http://wweir.cc", bytes.NewReader([]byte{1, 2, 3}))
+		req.Write(c1)
+	}()
+
+	c2, host, port, err := ParseAddr(c2, nil)
+
+	if err != nil || host != "wweir.cc" || port != 80 {
+		t.Error(err, host, port)
+	}
+
+	req, err := http.ReadRequest(bufio.NewReader(c2))
+	if err != nil {
+		t.Error(err)
+	}
+
+	data, err := ioutil.ReadAll(req.Body)
+	if err != nil || len(data) != 3 || data[0] != 1 {
+		t.Error(err, data)
+	}
+}
+
+func TestParseAddr2(t *testing.T) {
+	c1, c2 := net.Pipe()
+
+	go func() {
+		c1 = NewTgtConn(c1, nil, TGT_HTTPS, "", 443)
+		c1.Write(HTTPS.PingMsg("wweir.cc"))
+	}()
+
+	_, host, port, err := ParseAddr(c2, nil)
+
+	if err != nil || host != "wweir.cc" || port != 443 {
+		t.Error(err, host, port)
+	}
+}
+
+func TestParseAddr3(t *testing.T) {
+	c1, c2 := net.Pipe()
+
+	go func() {
+		c1 = NewTgtConn(c1, nil, TGT_OTHER, "wweir.cc", 1080)
+		c1.Write(HTTPS.PingMsg("wweir.cc"))
+	}()
+
+	_, host, port, err := ParseAddr(c2, nil)
+
+	if err != nil || host != "wweir.cc" || port != 1080 {
+		t.Error(err, host, port)
+	}
+}
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

-package parser
+package http

 import (
 	"encoding/binary"
@@ -1,4 +1,4 @@
-package dns
+package net

 import (
 	"math/rand"
@@ -9,14 +9,13 @@ import (
 	"github.com/krolaw/dhcp4"
 	"github.com/libp2p/go-reuseport"
 	"github.com/pkg/errors"
-	"github.com/wweir/sower/util"
 )

 var xid = make([]byte, 4)
 var broadcastAddr, _ = net.ResolveUDPAddr("udp", "255.255.255.255:67")

 func GetDefaultDNSServer() (string, error) {
-	iface, err := util.PickInterface()
+	iface, err := PickInternetInterface()
 	if err != nil {
 		return "", errors.Wrap(err, "pick interface")
 	}
@@ -0,0 +1,15 @@
+package net_test
+
+import (
+	"fmt"
+
+	"github.com/wweir/sower/internal/net"
+)
+
+func Example_dns() {
+	got, err := net.GetDefaultDNSServer()
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(got)
+}
@@ -1,14 +1,14 @@
 // +build !windows

-package util
+package net

 import (
 	"errors"
 	"net"
 )

-// PickInterface pick the first active net interface
-func PickInterface() (*Iface, error) {
+// PickInternetInterface pick the first active net interface
+func PickInternetInterface() (*Iface, error) {
 	ifaces, err := net.Interfaces()
 	if err != nil {
 		return nil, err
@@ -0,0 +1,15 @@
+package net_test
+
+import (
+	"fmt"
+
+	"github.com/wweir/sower/internal/net"
+)
+
+func Example_iface() {
+	got, err := net.PickInternetInterface()
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(got)
+}
@@ -1,6 +1,6 @@
 // +build windows

-package util
+package net

 import (
 	"bytes"
@@ -11,8 +11,8 @@ import (
 	"unsafe"
 )

-// PickInterface pick the first active net interface
-func PickInterface() (*Iface, error) {
+// PickInternetInterface pick the first active net interface
+func PickInternetInterface() (*Iface, error) {
 	list, err := getAdapterList()
 	if err != nil {
 		return nil, err
@@ -0,0 +1,9 @@
+package net
+
+import "net"
+
+// Iface is net interface address info
+type Iface struct {
+	net.HardwareAddr
+	net.IP
+}
@@ -0,0 +1,44 @@
+package socks5
+
+// https://tools.ietf.org/html/rfc1928
+
+type authReq struct {
+	VER      byte
+	NMETHODS byte
+	METHODS  [1]byte // 1 to 255, fix to no authentication
+}
+
+type authResp struct {
+	VER    byte
+	METHOD byte
+}
+
+type request struct {
+	req
+	DST_ADDR []byte // first byte is length
+	DST_PORT []byte // two bytes
+}
+type req struct {
+	VER  byte
+	CMD  byte
+	RSV  byte
+	ATYP byte
+}
+
+func (r *request) Bytes() []byte {
+	out := []byte{r.VER, r.CMD, r.RSV, r.ATYP}
+	out = append(out, r.DST_ADDR...)
+	return append(out, r.DST_PORT...)
+}
+
+type response struct {
+	resp
+	DST_ADDR []byte // first byte is length
+	DST_PORT []byte // two bytes
+}
+type resp struct {
+	VER  byte
+	REP  byte
+	RSV  byte
+	ATYP byte
+}
@@ -2,17 +2,31 @@ package socks5

 import (
 	"encoding/binary"
+	"fmt"
 	"io"
 	"net"
-	"strconv"
-
-	"github.com/pkg/errors"
+	"strings"
 )

-func ToSocks5(c net.Conn, domain, port string) net.Conn {
-	num, _ := strconv.Atoi(port)
-	bytes := []byte{byte(num >> 8), byte(num)}
-	return &conn{init: make(chan struct{}), Conn: c, domain: domain, port: bytes}
+func IsSocks5Schema(addr string) (string, bool) {
+	if strings.HasPrefix(addr, "socks5://") {
+		return strings.TrimPrefix(addr, "socks5://"), true
+	}
+
+	if strings.HasPrefix(addr, "socks5h://") {
+		return strings.TrimPrefix(addr, "socks5h://"), true
+	}
+
+	return addr, false
+}
+
+func ToSocks5(c net.Conn, domain string, port uint16) net.Conn {
+	return &conn{
+		init:   make(chan struct{}),
+		Conn:   c,
+		domain: domain,
+		port:   []byte{byte(port >> 8), byte(port)},
+	}
 }

 type conn struct {
@@ -75,7 +89,7 @@ func (c *conn) Write(b []byte) (n int, err error) {
 		switch resp.REP {
 		case 0x00:
 		default:
-			return 0, errors.Errorf("socks5 handshake fail, return code: %d", resp.REP)
+			return 0, fmt.Errorf("socks5 handshake fail, return code: %d", resp.REP)
 		}

 		switch resp.ATYP {
@@ -107,44 +121,3 @@ func (c *conn) Write(b []byte) (n int, err error) {
 	close(c.init)
 	return c.Conn.Write(b)
 }
-
-type authReq struct {
-	VER      byte
-	NMETHODS byte
-	METHODS  [1]byte // 1 to 255, fix to no authentication
-}
-
-type authResp struct {
-	VER    byte
-	METHOD byte
-}
-
-type request struct {
-	req
-	DST_ADDR []byte // first byte is length
-	DST_PORT []byte // two bytes
-}
-type req struct {
-	VER  byte
-	CMD  byte
-	RSV  byte
-	ATYP byte
-}
-
-func (r *request) Bytes() []byte {
-	out := []byte{r.VER, r.CMD, r.RSV, r.ATYP}
-	out = append(out, r.DST_ADDR...)
-	return append(out, r.DST_PORT...)
-}
-
-type response struct {
-	resp
-	DST_ADDR []byte // first byte is length
-	DST_PORT []byte // two bytes
-}
-type resp struct {
-	VER  byte
-	REP  byte
-	RSV  byte
-	ATYP byte
-}
@@ -1,50 +1,30 @@
 package main

 import (
-	"encoding/json"
+	"flag"
 	"fmt"
-	"net"

-	"github.com/golang/glog"
 	"github.com/wweir/sower/conf"
-	"github.com/wweir/sower/dns"
 	"github.com/wweir/sower/proxy"
-	"github.com/wweir/sower/proxy/transport"
 )

-var version, date string
-
 func main() {
-	cfg := &conf.Conf
-	if cfg.VersionOnly {
-		config, _ := json.MarshalIndent(cfg, "", "\t")
-		fmt.Printf("Version:\n\t%s %s\nConfig:\n%s", version, date, config)
-		return
-	}
-	glog.Infof("Starting sower(%s %s): %v", version, date, cfg)
-
-	tran, err := transport.GetTransport(cfg.NetType)
-	if err != nil {
-		glog.Exitln(err)
+	if conf.Server.Upstream != "" {
+		proxy.StartServer(conf.Server.Upstream, conf.Password,
+			conf.Server.CertFile, conf.Server.KeyFile, conf.Server.CertEmail)
 	}

-	if cfg.ServerAddr == "" {
-		proxy.StartServer(tran, cfg.ServerPort, cfg.Cipher, cfg.Password)
-
-	} else {
-		conf.AddRefreshFn(true, func() (string, error) {
-			dns.LoadRules(cfg.BlockList, cfg.Suggestions, cfg.WhiteList, cfg.ServerAddr)
-			return "load rules", nil
-		})
-
-		isSocks5 := (cfg.NetType == "SOCKS5")
-		serverAddr := net.JoinHostPort(cfg.ServerAddr, cfg.ServerPort)
-
-		if cfg.HTTPProxy != "" {
-			go proxy.StartHttpProxy(tran, isSocks5, serverAddr, cfg.Cipher, cfg.Password, cfg.HTTPProxy)
+	if conf.Client.Address != "" {
+		if conf.Client.DNS.ServeIP != "" {
+			go proxy.StartDNS(conf.Client.DNS.ServeIP, conf.Client.DNS.Upstream)
 		}

-		go dns.StartDNS(cfg.DNSServer, cfg.ClientIP, conf.SuggestCh, cfg.SuggestLevel)
-		proxy.StartClient(tran, isSocks5, serverAddr, cfg.Cipher, cfg.Password, cfg.ClientIP)
+		proxy.StartClient(conf.Password, conf.Client.Address, conf.Client.HTTPProxy.Address,
+			conf.Client.DNS.ServeIP, conf.Client.Router.PortMapping)
+	}
+
+	if conf.Server.Upstream == "" && conf.Client.Address == "" {
+		fmt.Println()
+		flag.Usage()
 	}
 }
@@ -1,98 +0,0 @@
-package proxy
-
-import (
-	"net"
-
-	"github.com/golang/glog"
-	"github.com/wweir/sower/proxy/parser"
-	"github.com/wweir/sower/proxy/shadow"
-	"github.com/wweir/sower/proxy/socks5"
-	"github.com/wweir/sower/proxy/transport"
-)
-
-func StartClient(tran transport.Transport, isSocks5 bool, server, cipher, password, listenIP string) {
-	conn80 := listenLocal(listenIP, "80")
-	conn443 := listenLocal(listenIP, "443")
-	var isHttp bool
-	var conn net.Conn
-
-	glog.Infoln("Client started.")
-	for {
-		select {
-		case conn = <-conn80:
-			isHttp = true
-		case conn = <-conn443:
-			isHttp = false
-		}
-
-		resolveAddr(&server)
-		glog.V(1).Infof("new conn from (%s) to (%s)", conn.RemoteAddr(), server)
-
-		rc, err := tran.Dial(server)
-		if err != nil {
-			conn.Close()
-			glog.Errorln(err)
-			continue
-		}
-
-		switch {
-		case isSocks5 && isHttp:
-			c, host, port, err := parser.ParseHttpAddr(conn)
-			if err != nil {
-				c.Close()
-				rc.Close()
-				glog.Errorln(err)
-				continue
-			}
-
-			conn = c
-			rc = socks5.ToSocks5(rc, host, port)
-
-		case isSocks5 && !isHttp:
-			c, host, err := parser.ParseHttpsHost(conn)
-			if err != nil {
-				c.Close()
-				rc.Close()
-				glog.Errorln(err)
-				continue
-			}
-
-			conn = c
-			rc = socks5.ToSocks5(rc, host, "443")
-
-		case !isSocks5 && isHttp:
-			rc = shadow.Shadow(rc, cipher, password)
-			rc = parser.NewHttpConn(rc)
-
-		case !isSocks5 && !isHttp:
-			rc = shadow.Shadow(rc, cipher, password)
-			rc = parser.NewHttpsConn(rc, "443")
-		}
-
-		go relay(conn, rc)
-	}
-}
-
-func listenLocal(listenIP string, port string) <-chan net.Conn {
-	connCh := make(chan net.Conn, 10)
-	go func() {
-		ln, err := net.Listen("tcp", net.JoinHostPort(listenIP, port))
-		if err != nil {
-			glog.Fatalln(err)
-		}
-
-		for {
-			conn, err := ln.Accept()
-			if err != nil {
-				glog.Errorln("accept", listenIP+port, "fail:", err)
-				continue
-			}
-
-			conn.(*net.TCPConn).SetKeepAlive(true)
-			connCh <- conn
-		}
-	}()
-
-	glog.Infoln("listening port:", port)
-	return connCh
-}
@@ -0,0 +1,93 @@
+package proxy
+
+import (
+	"net"
+	"strings"
+	"time"
+
+	"github.com/miekg/dns"
+	"github.com/wweir/sower/conf"
+	_net "github.com/wweir/sower/internal/net"
+	"github.com/wweir/utils/log"
+)
+
+func StartDNS(redirectIP, relayServer string) {
+	serveIP := net.ParseIP(redirectIP)
+	if redirectIP == "" || serveIP.String() != redirectIP {
+		log.Fatalw("invalid listen ip", "ip", redirectIP)
+	}
+
+	var err error
+	if relayServer, err = pickRelayAddr(relayServer); err != nil {
+		log.Fatalw("pick upstream dns server", "err", err)
+	}
+	log.Infow("detect upstream dns", "addr", relayServer)
+
+	dns.HandleFunc(".", func(w dns.ResponseWriter, r *dns.Msg) {
+		// *Msg r has an TSIG record and it was validated
+		if r.IsTsig() != nil && w.TsigStatus() == nil {
+			lastTsig := r.Extra[len(r.Extra)-1].(*dns.TSIG)
+			r.SetTsig(lastTsig.Hdr.Name, dns.HmacMD5, 300, time.Now().Unix())
+		}
+
+		//https://stackoverflow.com/questions/4082081/requesting-a-and-aaaa-records-in-single-dns-query/4083071#4083071
+		if len(r.Question) == 0 {
+			return
+		}
+
+		domain := r.Question[0].Name
+		if idx := strings.IndexByte(domain, ':'); idx > 0 {
+			domain = domain[:idx] // trim port
+		}
+
+		if conf.ShouldProxy(domain) {
+			w.WriteMsg(localA(r, domain, serveIP))
+
+		} else if msg, err := dns.Exchange(r, relayServer); err != nil || msg == nil {
+			server, err := pickRelayAddr(relayServer)
+			if err != nil {
+				log.Errorw("detect upstream dns", "err", err)
+			} else if relayServer != server {
+				relayServer = server
+				log.Infow("detect upstream dns", "addr", relayServer)
+			}
+
+		} else {
+			w.WriteMsg(msg)
+		}
+	})
+
+	server := &dns.Server{Addr: net.JoinHostPort(redirectIP, "53"), Net: "udp"}
+	log.Infow("start dns", "addr", server.Addr)
+	log.Fatalw("dns serve fail", "err", server.ListenAndServe())
+}
+
+func pickRelayAddr(relayServer string) (_ string, err error) {
+	if relayServer == "" {
+		if relayServer, err = _net.GetDefaultDNSServer(); err != nil {
+			return "", err
+		}
+	}
+
+	if _, _, err := net.SplitHostPort(relayServer); err != nil {
+		return net.JoinHostPort(relayServer, "53"), nil
+	}
+	return relayServer, nil
+}
+
+func localA(r *dns.Msg, domain string, localIP net.IP) *dns.Msg {
+	m := new(dns.Msg)
+	m.SetReply(r)
+	if localIP.To4() != nil {
+		m.Answer = []dns.RR{&dns.A{
+			Hdr: dns.RR_Header{Name: domain, Rrtype: dns.TypeA, Class: dns.ClassINET, Ttl: 20},
+			A:   localIP,
+		}}
+	} else {
+		m.Answer = []dns.RR{&dns.AAAA{
+			Hdr:  dns.RR_Header{Name: domain, Rrtype: dns.TypeAAAA, Class: dns.ClassINET, Ttl: 20},
+			AAAA: localIP,
+		}}
+	}
+	return m
+}
@@ -6,26 +6,23 @@ import (
 	"io"
 	"net"
 	"net/http"
-	"net/url"
+	"strconv"
 	"time"

-	"github.com/golang/glog"
-	"github.com/wweir/sower/proxy/parser"
-	"github.com/wweir/sower/proxy/shadow"
-	"github.com/wweir/sower/proxy/socks5"
-	"github.com/wweir/sower/proxy/transport"
+	"github.com/wweir/sower/conf"
+	_http "github.com/wweir/sower/internal/http"
+	"github.com/wweir/sower/util"
+	"github.com/wweir/utils/log"
 )

-func StartHttpProxy(tran transport.Transport, isSocks5 bool, server, cipher, password, addr string) {
+func startHTTPProxy(httpProxyAddr, serverAddr string, password []byte) {
 	srv := &http.Server{
-		Addr: addr,
+		Addr: httpProxyAddr,
 		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			resolveAddr(&server)
-
 			if r.Method == http.MethodConnect {
-				httpsProxy(w, r, tran, isSocks5, server, cipher, password)
+				httpsProxy(w, r, serverAddr, password)
 			} else {
-				httpProxy(w, r, tran, isSocks5, server, cipher, password)
+				httpProxy(w, r, serverAddr, password)
 			}
 		}),
 		// Disable HTTP/2.
@@ -33,40 +30,22 @@ func StartHttpProxy(tran transport.Transport, isSocks5 bool, server, cipher, pas
 		IdleTimeout:  90 * time.Second,
 	}

-	glog.Fatalln(srv.ListenAndServe())
+	go log.Fatalw("serve http proxy", "addr", httpProxyAddr, "err", srv.ListenAndServe())
 }

-func httpProxy(w http.ResponseWriter, r *http.Request,
-	tran transport.Transport, isSocks5 bool, server, cipher, password string) {
+func httpProxy(w http.ResponseWriter, r *http.Request, serverAddr string, password []byte) {
+	host, port := util.ParseHostPort(r.Host, 80)

-	roundTripper := &http.Transport{
-		MaxIdleConns:          100,
-		IdleConnTimeout:       90 * time.Second,
-		TLSHandshakeTimeout:   10 * time.Second,
-		ExpectContinueTimeout: 1 * time.Second,
-	}
-
-	if isSocks5 {
-		roundTripper.Proxy = func(*http.Request) (*url.URL, error) {
-			return url.Parse("socks5://" + server)
-		}
-
-	} else {
-		roundTripper.DialContext = func(context.Context, string, string) (net.Conn, error) {
-			conn, err := tran.Dial(server)
-			if err != nil {
-				return nil, err
-			}
-
-			conn = shadow.Shadow(conn, cipher, password)
-			return parser.NewHttpConn(conn), nil
+	roundTripper := &http.Transport{}
+	if conf.ShouldProxy(host) {
+		roundTripper.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
+			return dial(serverAddr, password, _http.TGT_HTTP, host, port)
 		}
 	}

 	resp, err := roundTripper.RoundTrip(r)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusServiceUnavailable)
-		glog.Errorln("serve https proxy, get remote data:", err)
 		return
 	}
 	defer resp.Body.Close()
@@ -80,10 +59,9 @@ func httpProxy(w http.ResponseWriter, r *http.Request,
 	io.Copy(w, resp.Body)
 }

-func httpsProxy(w http.ResponseWriter, r *http.Request,
-	tran transport.Transport, isSocks5 bool, server, cipher, password string) {
+func httpsProxy(w http.ResponseWriter, r *http.Request, serverAddr string, password []byte) {
+	host, port := util.ParseHostPort(r.Host, 443)

-	// local conn
 	conn, _, err := w.(http.Hijacker).Hijack()
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusServiceUnavailable)
@@ -94,34 +72,21 @@ func httpsProxy(w http.ResponseWriter, r *http.Request,
 	if _, err := conn.Write([]byte(r.Proto + " 200 Connection established\r\n\r\n")); err != nil {
 		http.Error(w, err.Error(), http.StatusServiceUnavailable)
 		conn.Close()
-		glog.Errorln("serve https proxy, write data fail:", err)
 		return
 	}

-	// remote conn
-	rc, err := tran.Dial(server)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusServiceUnavailable)
-		conn.Close()
-		glog.Errorln("serve https proxy, dial remote fail:", err)
-		return
-	}
-
-	host, port, err := net.SplitHostPort(r.Host)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusServiceUnavailable)
-		conn.Close()
-		glog.Errorln("serve https proxy, dial remote fail:", err)
-		return
-	}
-
-	if isSocks5 {
-		rc = socks5.ToSocks5(rc, host, port)
-
+	var rc net.Conn
+	if conf.ShouldProxy(host) {
+		rc, err = dial(serverAddr, password, _http.TGT_HTTPS, host, port)
 	} else {
-		rc = shadow.Shadow(rc, cipher, password)
-		rc = parser.NewHttpsConn(rc, port)
+		rc, err = net.Dial("tcp", net.JoinHostPort(host, strconv.Itoa(int(port))))
 	}
+	if err != nil {
+		conn.Write([]byte("sower dial " + serverAddr + " fail: " + err.Error()))
+		conn.Close()
+		return
+	}
+	defer rc.Close()

-	relay(rc, conn)
+	relay(conn, rc)
 }
@@ -1,12 +0,0 @@
-// Package parser transter conn to be a parser conn
-//
-// init request payload:
-//   <type>(1) + <size>(2))(+Overhead) + <data>(size+Overhead)
-// data definition:
-//   0x00(any):   [size](1) + [addr:port] + content
-//   0x01(http):  content
-//   0x02(https): [port](2) + content
-//
-// init response payload:
-//   ([status code](2) + <size>(2))(+Overhead) + <content>(size+Overhead)
-package parser
@@ -1,163 +0,0 @@
-package parser
-
-import (
-	"bufio"
-	"io"
-	"net"
-	"net/http"
-	"strconv"
-	"strings"
-
-	"github.com/pkg/errors"
-	"github.com/wweir/sower/util"
-)
-
-const (
-	OTHER byte = iota
-	HTTP
-	HTTPS
-)
-
-// Write Addr
-type conn struct {
-	typ    byte
-	domain string
-	port   string
-	init   bool
-	net.Conn
-}
-
-func NewOtherConn(c net.Conn, domain, port string) net.Conn {
-	return &conn{
-		typ:    OTHER,
-		domain: domain,
-		port:   port,
-		init:   true,
-		Conn:   c,
-	}
-}
-func NewHttpConn(c net.Conn) net.Conn {
-	return &conn{
-		typ:  HTTP,
-		init: true,
-		Conn: c,
-	}
-}
-func NewHttpsConn(c net.Conn, port string) net.Conn {
-	return &conn{
-		typ:  HTTPS,
-		port: port,
-		init: true,
-		Conn: c,
-	}
-}
-
-func (c *conn) Write(b []byte) (n int, err error) {
-	if c.init {
-		var pkg []byte
-		var prefixLen int
-		switch c.typ {
-		case OTHER:
-			// type + domain + ':' + port + data
-			prefixLen = 1 + len(c.domain) + 1 + len(c.port)
-			pkg = make([]byte, 0, prefixLen+len(b))
-			pkg = append(pkg, OTHER)
-			pkg = append(pkg, byte(len(c.domain)+1+len(c.port)))
-			pkg = append(pkg, []byte(c.domain+":"+c.port)...)
-
-		case HTTP:
-			// type + data
-			prefixLen = 1
-			pkg = make([]byte, 0, prefixLen+len(b))
-			pkg = append(pkg, HTTP)
-
-		case HTTPS:
-			// type + port + data
-			prefixLen = 1 + 2
-			pkg = make([]byte, 0, prefixLen+len(b))
-			pkg = append(pkg, HTTPS)
-			port, _ := strconv.Atoi(c.port)
-			pkg = append(pkg, byte(port>>8), byte(port))
-		}
-
-		c.init = false
-		n, err := c.Conn.Write(append(pkg, b...))
-		// n should larger than prefix length, if not, err is not nil
-		return n - prefixLen, err
-	}
-
-	return c.Conn.Write(b)
-}
-
-// Read Addr
-func ParseAddr(conn net.Conn) (net.Conn, string, string, error) {
-	buf := make([]byte, 1)
-	if _, err := io.ReadFull(conn, buf); err != nil {
-		return conn, "", "", err
-	}
-
-	switch buf[0] {
-	case OTHER:
-		if _, err := io.ReadFull(conn, buf); err != nil {
-			return conn, "", "", err
-		}
-		buf = make([]byte, int(buf[0]))
-		if _, err := io.ReadFull(conn, buf); err != nil {
-			return conn, "", "", err
-		}
-
-		addr := string(buf)
-		if idx := strings.LastIndex(addr, ":"); idx != -1 {
-			return conn, addr[:idx], addr[idx+1:], nil
-		}
-		return conn, "", "", errors.New("invalid payload")
-
-	case HTTP:
-		return ParseHttpAddr(conn)
-
-	case HTTPS:
-		buf = make([]byte, 2)
-		if _, err := io.ReadFull(conn, buf); err != nil {
-			return conn, "", "", err
-		}
-		port := strconv.Itoa(int(buf[0])<<8 + int(buf[1]))
-
-		conn, domain, err := ParseHttpsHost(conn)
-		return conn, domain, port, err
-
-	default:
-		return conn, "", "", errors.Errorf("not supported type (%v)", buf[0])
-	}
-}
-
-func ParseHttpAddr(conn net.Conn) (net.Conn, string, string, error) {
-	teeConn := &util.TeeConn{Conn: conn}
-	teeConn.StartOrReset()
-	defer teeConn.Stop()
-
-	b := bufio.NewReader(teeConn)
-	resp, err := http.ReadRequest(b)
-	if err != nil {
-		return teeConn, "", "", err
-	}
-
-	if idx := strings.LastIndex(resp.Host, ":"); idx != -1 {
-		return teeConn, resp.Host[:idx], resp.Host[idx+1:], nil
-	}
-	return teeConn, resp.Host, "80", nil
-}
-
-func ParseHttpsHost(conn net.Conn) (net.Conn, string, error) {
-	teeConn := &util.TeeConn{Conn: conn}
-	teeConn.StartOrReset()
-	defer teeConn.Stop()
-
-	domain, _, err := extractSNI(teeConn)
-	if err != nil {
-		return teeConn, "", err
-	} else if domain == "" {
-		return teeConn, "", errors.New("ClientHello did not present an SNI extension")
-	}
-
-	return teeConn, domain, nil
-}
@@ -1,97 +0,0 @@
-package parser
-
-import (
-	"bufio"
-	"bytes"
-	"io/ioutil"
-	"net"
-	"net/http"
-	"testing"
-
-	"github.com/wweir/sower/proxy/shadow"
-	"github.com/wweir/sower/util"
-)
-
-func TestParseAddr1(t *testing.T) {
-	c1, c2 := net.Pipe()
-
-	go func() {
-		c1 = NewHttpConn(c1)
-		req, _ := http.NewRequest("GET", "http://wweir.cc", bytes.NewReader([]byte{1, 2, 3}))
-		req.Write(c1)
-	}()
-
-	c2, host, port, err := ParseAddr(c2)
-
-	if err != nil || host != "wweir.cc" || port != "80" {
-		t.Error(err, host, port)
-	}
-
-	req, err := http.ReadRequest(bufio.NewReader(c2))
-	if err != nil {
-		t.Error(err)
-	}
-
-	data, err := ioutil.ReadAll(req.Body)
-	if err != nil || len(data) != 3 || data[0] != 1 {
-		t.Error(err, data)
-	}
-}
-
-func TestParseAddr2(t *testing.T) {
-	c1, c2 := net.Pipe()
-
-	go func() {
-		c1 = NewHttpsConn(c1, "443")
-		c1.Write(util.HTTPS.PingMsg("wweir.cc"))
-	}()
-
-	_, host, port, err := ParseAddr(c2)
-
-	if err != nil || host != "wweir.cc" || port != "443" {
-		t.Error(err, host, port)
-	}
-}
-
-func TestParseAddr3(t *testing.T) {
-	c1, c2 := net.Pipe()
-
-	go func() {
-		c1 = NewOtherConn(c1, "wweir.cc", "1080")
-		c1.Write(util.HTTPS.PingMsg("wweir.cc"))
-	}()
-
-	_, host, port, err := ParseAddr(c2)
-
-	if err != nil || host != "wweir.cc" || port != "1080" {
-		t.Error(err, host, port)
-	}
-}
-
-func TestParseAddr4(t *testing.T) {
-	c1, c2 := net.Pipe()
-
-	go func() {
-		c1 = shadow.Shadow(c1, "AES_128_GCM", "12345678")
-		c1 = NewHttpConn(c1)
-		req, _ := http.NewRequest("GET", "http://wweir.cc", bytes.NewReader([]byte{1, 2, 3}))
-		req.Write(c1)
-	}()
-
-	c2 = shadow.Shadow(c2, "AES_128_GCM", "12345678")
-	c2, host, port, err := ParseAddr(c2)
-
-	if err != nil || host != "wweir.cc" || port != "80" {
-		t.Error(err, host, port)
-	}
-
-	req, err := http.ReadRequest(bufio.NewReader(c2))
-	if err != nil {
-		t.Error(err)
-	}
-
-	data, err := ioutil.ReadAll(req.Body)
-	if err != nil || len(data) != 3 || data[0] != 1 {
-		t.Error(err, data)
-	}
-}
@@ -0,0 +1,158 @@
+package proxy
+
+import (
+	"crypto/tls"
+	"net"
+	"net/http"
+	"strconv"
+
+	_http "github.com/wweir/sower/internal/http"
+	"github.com/wweir/sower/internal/socks5"
+	"github.com/wweir/sower/util"
+	"github.com/wweir/utils/log"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+const configDir = "/etc/sower"
+
+type head struct {
+	checksum byte
+	length   byte
+}
+
+func StartClient(password, serverAddr, httpProxy, dnsServeIP string, forwards map[string]string) {
+	passwordData := []byte(password)
+	_, isSocks5 := socks5.IsSocks5Schema(serverAddr)
+
+	if httpProxy != "" {
+		go startHTTPProxy(httpProxy, serverAddr, passwordData)
+	}
+
+	relayToRemote := func(tgtType byte, lnAddr string, host string, port uint16) {
+		ln, err := net.Listen("tcp", lnAddr)
+		if err != nil {
+			log.Fatalw("tcp listen", "port", lnAddr, "err", err)
+		}
+
+		for {
+			conn, err := ln.Accept()
+			if err != nil {
+				log.Errorw("tcp accept", "port", lnAddr, "err", err)
+				continue
+			}
+
+			go func(conn net.Conn) {
+				defer conn.Close()
+
+				if isSocks5 {
+					teeConn := &util.TeeConn{Conn: conn}
+					teeConn.StartOrReset()
+
+					switch tgtType {
+					case _http.TGT_HTTP:
+						conn, host, port, err = _http.ParseHTTP(teeConn)
+					case _http.TGT_HTTPS:
+						conn, host, err = _http.ParseHTTPS(teeConn)
+					}
+					if err != nil {
+						log.Errorw("parse socks5 target", "err", err)
+						return
+					}
+					teeConn.Stop()
+				}
+
+				rc, err := dial(serverAddr, passwordData, tgtType, host, port)
+				if err != nil {
+					log.Errorw("dial", "addr", serverAddr, "err", err)
+					return
+				}
+				defer rc.Close()
+
+				relay(conn, rc)
+			}(conn)
+		}
+	}
+
+	if dnsServeIP != "" {
+		go relayToRemote(_http.TGT_HTTP, dnsServeIP+":http", "", 80)
+		go relayToRemote(_http.TGT_HTTPS, dnsServeIP+":https", "", 443)
+	}
+
+	for from, to := range forwards {
+		go func(from, to string) {
+			host, port := util.ParseHostPort(to, 0)
+			relayToRemote(_http.TGT_OTHER, from, host, port)
+		}(from, to)
+	}
+
+	select {}
+}
+
+func StartServer(relayTarget, password, certFile, keyFile, email string) {
+	certManager := autocert.Manager{
+		Prompt: autocert.AcceptTOS,
+		Cache:  autocert.DirCache(configDir), //folder for storing certificates
+		Email:  email,
+	}
+	tlsConf := &tls.Config{
+		GetCertificate: certManager.GetCertificate,
+		MinVersion:     tls.VersionTLS12,
+	}
+	if certFile != "" && keyFile != "" {
+		if cert, err := tls.LoadX509KeyPair(certFile, keyFile); err != nil {
+			log.Fatalw("load certificate", "cert", certFile, "key", keyFile, "err", err)
+		} else {
+			tlsConf.GetCertificate = nil
+			tlsConf.Certificates = []tls.Certificate{cert}
+		}
+	}
+
+	// Try to redirect 80 to 443
+	go http.ListenAndServe(":http", certManager.HTTPHandler(http.HandlerFunc(
+		func(w http.ResponseWriter, r *http.Request) {
+			if host, _, err := net.SplitHostPort(r.Host); err != nil {
+				r.URL.Host = r.Host
+			} else {
+				r.URL.Host = host
+			}
+			r.URL.Scheme = "https"
+			http.Redirect(w, r, r.URL.String(), 301)
+		})))
+
+	ln, err := tls.Listen("tcp", ":https", tlsConf)
+	if err != nil {
+		log.Fatalw("tcp listen", "err", err)
+	}
+
+	passwordData := []byte(password)
+	for {
+		conn, err := ln.Accept()
+		if err != nil {
+			log.Errorw("tcp accept", "err", err)
+			continue
+		}
+
+		go func(conn net.Conn) {
+			conn, domain, port, err := _http.ParseAddr(conn, passwordData)
+			if err != nil {
+				log.Errorw("parse relay target", "err", err)
+				return
+			}
+			defer conn.Close()
+
+			addr := relayTarget
+			if domain != "" {
+				addr = net.JoinHostPort(domain, strconv.Itoa(int(port)))
+			}
+
+			rc, err := net.Dial("tcp", addr)
+			if err != nil {
+				log.Errorw("tcp dial", "host", domain, "addr", addr, "err", err)
+				return
+			}
+			defer rc.Close()
+
+			relay(conn, rc)
+		}(conn)
+	}
+}
@@ -1,51 +0,0 @@
-package proxy
-
-import (
-	"net"
-	"strings"
-
-	"github.com/golang/glog"
-	"github.com/wweir/sower/proxy/parser"
-	"github.com/wweir/sower/proxy/shadow"
-	"github.com/wweir/sower/proxy/transport"
-)
-
-func StartServer(tran transport.Transport, port, cipher, password string) {
-	if port == "" {
-		glog.Fatalln("port must set")
-	}
-	if !strings.HasPrefix(port, ":") {
-		port = ":" + port
-	}
-
-	connCh, err := tran.Listen(port)
-	if err != nil {
-		glog.Fatalf("listen %v fail: %s", port, err)
-	}
-
-	glog.Infoln("Server started.")
-	for {
-		go handle(<-connCh, cipher, password)
-	}
-}
-
-func handle(conn net.Conn, cipher, password string) {
-	conn = shadow.Shadow(conn, cipher, password)
-	conn, host, port, err := parser.ParseAddr(conn)
-	if err != nil {
-		conn.Close()
-		glog.Warningln(err)
-		return
-	}
-	glog.V(1).Infof("new conn from %s to %s:%s", conn.RemoteAddr(), host, port)
-
-	rc, err := net.Dial("tcp", net.JoinHostPort(host, port))
-	if err != nil {
-		conn.Close()
-		glog.Warningln(err)
-		return
-	}
-	rc.(*net.TCPConn).SetKeepAlive(true)
-
-	relay(rc, conn)
-}
@@ -1,76 +0,0 @@
-package shadow
-
-import (
-	"crypto/aes"
-	"crypto/cipher"
-
-	"github.com/pkg/errors"
-	"golang.org/x/crypto/chacha20poly1305"
-)
-
-//go:generate stringer -type=typ $GOFILE
-type typ int
-
-const (
-	AES_128_GCM typ = iota
-	AES_192_GCM
-	AES_256_GCM
-	CHACHA20_IETF_POLY1305
-	XCHACHA20_IETF_POLY1305
-	cipherEnd
-)
-
-func ListCiphers() []string {
-	list := make([]string, 0, int(cipherEnd))
-	for i := typ(0); i < cipherEnd; i++ {
-		list = append(list, i.String())
-	}
-	return list
-}
-
-func pickCipher(typ, password string) (cipher.AEAD, error) {
-	var blockSize int
-	switch typ {
-	case AES_128_GCM.String():
-		blockSize = 16
-	case AES_192_GCM.String():
-		blockSize = 24
-	case AES_256_GCM.String():
-		blockSize = 32
-
-	case CHACHA20_IETF_POLY1305.String():
-		return chacha20poly1305.New(genKey(password, 256))
-	case XCHACHA20_IETF_POLY1305.String():
-		return chacha20poly1305.NewX(genKey(password, 256))
-
-	default:
-		return nil, errors.New("do not support cipher type: " + typ)
-	}
-
-	// aes gcm
-	block, err := aes.NewCipher(genKey(password, blockSize))
-	if err != nil {
-		return nil, errors.Wrap(err, "password")
-	}
-
-	aead, err := cipher.NewGCM(block)
-	if err != nil {
-		return nil, errors.Wrap(err, AES_128_GCM.String())
-	}
-	return aead, nil
-}
-
-func genKey(filler string, size int) []byte {
-	res := make([]byte, size)
-	if filler == "" {
-		panic("password should not be empty")
-	}
-
-	fillerByte := []byte(filler)
-	length := len(fillerByte)
-	for i := 0; ; i++ {
-		if copy(res[i*length:], fillerByte) != length {
-			return res
-		}
-	}
-}
@@ -1,5 +0,0 @@
-// Package shadow transter conn to be a crypto conn
-// support aead mode only
-// data payload:
-//   <size>(2+Overhead) + <content>(size+Overhead)
-package shadow
@@ -1,111 +0,0 @@
-package shadow
-
-import (
-	"crypto/cipher"
-	"encoding/binary"
-	"io"
-	"math/rand"
-	"net"
-)
-
-const MAX_SIZE = 0xFFFF
-
-type conn struct {
-	maxSize      int
-	aead         cipher.AEAD
-	encryptNonce func() []byte
-	decryptNonce func() []byte
-	writeBuf     []byte
-	readBuf      []byte
-	readOffset   int
-	net.Conn
-}
-
-func (c *conn) Read(b []byte) (n int, err error) {
-	// read from buffer
-	if c.readOffset != 0 {
-		dataSize := len(c.readBuf) - c.aead.Overhead()
-		n = copy(b, c.readBuf[c.readOffset:dataSize])
-		c.readOffset += n
-
-		if c.readOffset == dataSize {
-			c.readOffset = 0
-		}
-		return
-	}
-
-	// read from conn
-	dataSize := 0
-	{ //read data size
-		c.readBuf = make([]byte, 2+c.aead.Overhead())
-		if _, err = io.ReadFull(c.Conn, c.readBuf); err != nil {
-			return
-		}
-		if _, err = c.aead.Open(c.readBuf[:0], c.decryptNonce(), c.readBuf, nil); err != nil {
-			return
-		}
-		dataSize = int(c.readBuf[0])<<8 + int(c.readBuf[1])
-	}
-	{ // read data
-		c.readBuf = make([]byte, dataSize+c.aead.Overhead())
-		if _, err = io.ReadFull(c.Conn, c.readBuf); err != nil {
-			return
-		}
-		if _, err = c.aead.Open(c.readBuf[:0], c.decryptNonce(), c.readBuf, nil); err != nil {
-			return
-		}
-	}
-
-	// buffer extra data
-	if n = copy(b, c.readBuf[:dataSize]); n < dataSize {
-		c.readOffset = n
-	}
-	return
-}
-
-func (c *conn) Write(b []byte) (n int, err error) {
-	bLen := len(b)
-	dataSize := MAX_SIZE - (2 + c.aead.Overhead()) - c.aead.Overhead()
-	if bLen < c.maxSize {
-		dataSize = bLen
-	}
-
-	// BigEndian
-	c.writeBuf[0], c.writeBuf[1] = byte(dataSize>>8), byte(dataSize)
-
-	c.aead.Seal(c.writeBuf[:0], c.encryptNonce(), c.writeBuf[:2], nil)
-	c.aead.Seal(c.writeBuf[:2+c.aead.Overhead()], c.encryptNonce(), b[:dataSize], nil)
-
-	_, err = c.Conn.Write(c.writeBuf[:dataSize+(2+c.aead.Overhead())+c.aead.Overhead()])
-	if err != nil {
-		return 0, err
-	}
-	return dataSize, err
-}
-
-func Shadow(c net.Conn, cipher, password string) net.Conn {
-	aead, err := pickCipher(cipher, password)
-	if err != nil {
-		panic(err)
-	}
-
-	return &conn{
-		maxSize:      MAX_SIZE - (2 - aead.Overhead()) - aead.Overhead(),
-		aead:         aead,
-		encryptNonce: newNonce(password, aead.NonceSize()),
-		decryptNonce: newNonce(password, aead.NonceSize()),
-		writeBuf:     make([]byte, 0xFFFF),
-		Conn:         c,
-	}
-}
-
-func newNonce(password string, size int) func() []byte {
-	num, _ := binary.Varint([]byte(password))
-	rnd := rand.New(rand.NewSource(num))
-
-	buf := make([]byte, size)
-	return func() []byte {
-		rnd.Read(buf)
-		return buf
-	}
-}
@@ -1,22 +0,0 @@
-package shadow
-
-import (
-	"net"
-	"testing"
-)
-
-func TestShadow(t *testing.T) {
-	c1, c2 := net.Pipe()
-
-	go func() {
-		conn := Shadow(c1, "AES_128_GCM", "12345678")
-		conn.Write([]byte{1, 2})
-	}()
-
-	conn := Shadow(c2, "AES_128_GCM", "12345678")
-	buf := make([]byte, 3)
-	n, _ := conn.Read(buf)
-	if n!=2|| buf[0] != 1 || buf[1] != 2  {
-		t.Error(buf)
-	}
-}
@@ -1,16 +0,0 @@
-// Code generated by "stringer -type=typ cipher.go"; DO NOT EDIT.
-
-package shadow
-
-import "strconv"
-
-const _typ_name = "AES_128_GCMAES_192_GCMAES_256_GCMCHACHA20_IETF_POLY1305XCHACHA20_IETF_POLY1305cipherEnd"
-
-var _typ_index = [...]uint8{0, 11, 22, 33, 55, 78, 87}
-
-func (i typ) String() string {
-	if i < 0 || i >= typ(len(_typ_index)-1) {
-		return "typ(" + strconv.FormatInt(int64(i), 10) + ")"
-	}
-	return _typ_name[_typ_index[i]:_typ_index[i+1]]
-}
@@ -1,115 +0,0 @@
-package transport
-
-import (
-	"net"
-
-	"github.com/golang/glog"
-	"github.com/pkg/errors"
-	kcp "github.com/xtaci/kcp-go"
-)
-
-type kcpTran struct {
-	client
-	server
-}
-type client struct {
-	DataShard    int
-	ParityShard  int
-	DSCP         int
-	SockBuf      int
-	AckNodelay   bool
-	NoDelay      int
-	Interval     int
-	Resend       int
-	NoCongestion int
-	SndWnd       int
-	RcvWnd       int
-	MTU          int
-}
-type server struct {
-	DataShard   int
-	ParityShard int
-	DSCP        int
-	SockBuf     int
-}
-
-func init() {
-	transports["KCP"] = &kcpTran{
-		client: client{
-			DataShard:    10,
-			ParityShard:  3,
-			DSCP:         0,
-			SockBuf:      4194304,
-			NoDelay:      0,
-			Interval:     50,
-			Resend:       0,
-			NoCongestion: 0,
-			SndWnd:       0,
-			RcvWnd:       0,
-			MTU:          1350,
-		},
-		server: server{
-			DataShard:   10,
-			ParityShard: 3,
-			DSCP:        0,
-			SockBuf:     4194304,
-		},
-	}
-}
-
-func (c *client) Dial(server string) (net.Conn, error) {
-	conn, err := kcp.DialWithOptions(server, nil, c.DataShard, c.ParityShard)
-	if err != nil {
-		return nil, errors.Wrap(err, "dial")
-	}
-
-	conn.SetStreamMode(true)
-	conn.SetWriteDelay(false)
-	conn.SetNoDelay(c.NoDelay, c.Interval, c.Resend, c.NoCongestion)
-	conn.SetWindowSize(c.SndWnd, c.RcvWnd)
-	conn.SetMtu(c.MTU)
-	conn.SetACKNoDelay(c.AckNodelay)
-
-	if err := conn.SetDSCP(c.DSCP); err != nil {
-		return nil, errors.Wrap(err, "SetDSCP")
-	}
-	if err := conn.SetReadBuffer(c.SockBuf); err != nil {
-		return nil, errors.Wrap(err, "SetReadBuffer")
-	}
-	if err := conn.SetWriteBuffer(c.SockBuf); err != nil {
-		return nil, errors.Wrap(err, "SetWriteBuffer")
-	}
-
-	return conn, nil
-}
-
-func (s *server) Listen(port string) (<-chan net.Conn, error) {
-	ln, err := kcp.ListenWithOptions(port, nil, s.DataShard, s.ParityShard)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := ln.SetDSCP(s.DSCP); err != nil {
-		return nil, errors.Wrap(err, "SetDSCP")
-	}
-	if err := ln.SetReadBuffer(s.SockBuf); err != nil {
-		return nil, errors.Wrap(err, "SetReadBuffer")
-	}
-	if err := ln.SetWriteBuffer(s.SockBuf); err != nil {
-		return nil, errors.Wrap(err, "SetWriteBuffer")
-	}
-
-	connCh := make(chan net.Conn)
-	go func() {
-		for {
-			conn, err := ln.AcceptKCP()
-			if err != nil {
-				glog.Fatalln("KCP listen:", err)
-			}
-
-			connCh <- conn
-		}
-	}()
-
-	return connCh, nil
-}
@@ -1,137 +0,0 @@
-package transport
-
-import (
-	"context"
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/tls"
-	"crypto/x509"
-	"encoding/pem"
-	"math/big"
-	"net"
-	"time"
-
-	"github.com/golang/glog"
-	quic "github.com/lucas-clemente/quic-go"
-	"github.com/pkg/errors"
-	"github.com/wweir/sower/util"
-)
-
-type quicTran struct {
-	clientConf *quic.Config
-	sess       quic.Session
-
-	serverConf *quic.Config
-}
-
-func init() {
-	transports["QUIC"] = &quicTran{
-
-		clientConf: &quic.Config{
-			HandshakeTimeout: time.Second,
-			KeepAlive:        true,
-			IdleTimeout:      time.Minute,
-		},
-		serverConf: &quic.Config{
-			MaxIncomingStreams: 1024,
-		},
-	}
-}
-
-func (c *quicTran) Dial(server string) (net.Conn, error) {
-	if c.sess == nil {
-		if sess, err := quic.DialAddr(server, &tls.Config{InsecureSkipVerify: true}, c.clientConf); err != nil {
-			return nil, errors.Wrap(err, "session")
-		} else {
-			go func() {
-				<-sess.Context().Done()
-				sess.Close()
-				c.sess = nil
-			}()
-			c.sess = sess
-		}
-	}
-
-	var stream quic.Stream
-	if err := util.WithTimeout(func() (err error) {
-		if stream, err = c.sess.OpenStream(); err != nil {
-			c.sess = nil
-		}
-		return
-	}, time.Second); err != nil {
-		return nil, errors.Wrap(err, "stream")
-	}
-
-	return &streamConn{
-		Stream: stream,
-		sess:   c.sess,
-	}, nil
-}
-
-type streamConn struct {
-	quic.Stream
-	sess quic.Session
-}
-
-func (s *streamConn) LocalAddr() net.Addr {
-	return s.sess.LocalAddr()
-}
-
-func (s *streamConn) RemoteAddr() net.Addr {
-	return s.sess.RemoteAddr()
-}
-
-func mockTlsPem() *tls.Config {
-	key, err := rsa.GenerateKey(rand.Reader, 1024)
-	if err != nil {
-		glog.Fatalln(err)
-	}
-	template := x509.Certificate{SerialNumber: big.NewInt(1)}
-	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
-	if err != nil {
-		glog.Fatalln(err)
-	}
-
-	certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
-	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
-
-	tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
-	if err != nil {
-		glog.Fatalln(err)
-	}
-	return &tls.Config{Certificates: []tls.Certificate{tlsCert}}
-}
-
-func (s *quicTran) Listen(port string) (<-chan net.Conn, error) {
-	ln, err := quic.ListenAddr(port, mockTlsPem(), s.serverConf)
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	connCh := make(chan net.Conn)
-	go func() {
-		for {
-			sess, err := ln.Accept(context.Background())
-			if err != nil {
-				glog.Fatalln(err)
-			}
-			go accept(sess, connCh)
-		}
-	}()
-	return connCh, nil
-}
-
-func accept(sess quic.Session, connCh chan<- net.Conn) {
-	glog.V(1).Infoln("new session from ", sess.RemoteAddr())
-	defer sess.Close()
-
-	for {
-		stream, err := sess.AcceptStream(context.Background())
-		if err != nil {
-			glog.Errorln(err)
-			return
-		}
-
-		connCh <- &streamConn{stream, sess}
-	}
-}
@@ -1,58 +0,0 @@
-package transport
-
-import (
-	"net"
-	"time"
-
-	"github.com/golang/glog"
-)
-
-type tcp struct {
-	DialTimeout time.Duration
-	isSocks5    bool
-}
-
-func init() {
-	transports["TCP"] = &tcp{
-		DialTimeout: 5 * time.Second,
-	}
-	transports["SOCKS5"] = &tcp{
-		DialTimeout: 5 * time.Second,
-		isSocks5:    true,
-	}
-}
-
-func (t *tcp) Dial(server string) (net.Conn, error) {
-	conn, err := net.DialTimeout("tcp", server, t.DialTimeout)
-	if err != nil {
-		return nil, err
-	}
-
-	conn.(*net.TCPConn).SetKeepAlive(true)
-	return conn, nil
-}
-
-func (t *tcp) Listen(port string) (<-chan net.Conn, error) {
-	if t.isSocks5 {
-		panic("not support run as socks5 server")
-	}
-
-	ln, err := net.Listen("tcp", port)
-	if err != nil {
-		return nil, err
-	}
-
-	connCh := make(chan net.Conn)
-	go func() {
-		for {
-			conn, err := ln.Accept()
-			if err != nil {
-				glog.Fatalln("TCP listen:", err)
-			}
-
-			conn.(*net.TCPConn).SetKeepAlive(true)
-			connCh <- conn
-		}
-	}()
-	return connCh, nil
-}
@@ -1,30 +0,0 @@
-package transport
-
-import (
-	"net"
-
-	"github.com/pkg/errors"
-)
-
-type Transport interface {
-	Dial(server string) (net.Conn, error)
-	Listen(port string) (<-chan net.Conn, error)
-}
-
-var transports = map[string]Transport{}
-
-func ListTransports() []string {
-	list := make([]string, 0, len(transports))
-	for key := range transports {
-		list = append(list, key)
-	}
-	return list
-}
-
-func GetTransport(netType string) (Transport, error) {
-	tran, ok := transports[netType]
-	if !ok {
-		return nil, errors.New("invalid net type: " + netType)
-	}
-	return tran, nil
-}
@@ -1,28 +1,31 @@
 package proxy

 import (
+	"crypto/tls"
 	"io"
 	"net"
 	"sync"
 	"sync/atomic"
 	"time"

-	"github.com/golang/glog"
+	"github.com/wweir/sower/internal/http"
+	"github.com/wweir/sower/internal/socks5"
 )

-// race safe
-var resolved = false
-
-func resolveAddr(server *string) {
-	if !resolved {
-		if addr, err := net.ResolveTCPAddr("tcp", *server); err != nil {
-			glog.Errorln(err)
-		} else {
-			glog.Infof("remote server (%s)=>(%s)", *server, addr)
-			*server = addr.String()
-			resolved = true
+func dial(serverAddr string, password []byte, tgtType byte, domain string, port uint16) (net.Conn, error) {
+	if addr, ok := socks5.IsSocks5Schema(serverAddr); ok {
+		conn, err := net.Dial("tcp", addr)
+		if err != nil {
+			return nil, err
 		}
+		return socks5.ToSocks5(conn, domain, port), nil
 	}
+
+	conn, err := tls.Dial("tcp", net.JoinHostPort(serverAddr, "443"), &tls.Config{})
+	if err != nil {
+		return nil, err
+	}
+	return http.NewTgtConn(conn, password, tgtType, domain, port), nil
 }

 func relay(conn1, conn2 net.Conn) {
@@ -35,18 +38,13 @@ func relay(conn1, conn2 net.Conn) {
 }

 func redirect(dst, src net.Conn, wg *sync.WaitGroup, exitFlag *int32) {
-	if _, err := io.Copy(dst, src); err != nil {
-		glog.V(1).Infof("%s<>%s -> %s<>%s: %s", src.RemoteAddr(), src.LocalAddr(), dst.LocalAddr(), dst.RemoteAddr(), err)
-	}
+	io.Copy(dst, src)

 	if atomic.CompareAndSwapInt32(exitFlag, 0, 1) {
 		// wakeup blocked goroutine
 		now := time.Now()
 		src.SetDeadline(now)
 		dst.SetDeadline(now)
-	} else {
-		src.Close()
-		dst.Close()
 	}

 	wg.Done()
@@ -1,23 +0,0 @@
-package util
-
-import (
-	"runtime"
-	"testing"
-)
-
-func TestPickInterface(t *testing.T) {
-	switch runtime.GOOS {
-	case "windows":
-	case "darwin":
-	default:
-		t.Skip("skip for some enviroment not have net interface")
-		return
-	}
-
-	got, err := PickInterface()
-	if err != nil {
-		t.Errorf("PickInterface() error = %v", err)
-	} else {
-		t.Logf("PickInterface() got: MAC: %s IP: %s", got.HardwareAddr, got.IP)
-	}
-}
@@ -14,11 +14,8 @@ type node struct {
 	node map[string]*node
 }

-func NewNode(sep string) *Node {
-	return &Node{node{node: map[string]*node{}}, sep, &sync.RWMutex{}}
-}
-func NewNodeFromRules(sep string, rules ...string) *Node {
-	n := NewNode(sep)
+func NewNodeFromRules(rules ...string) *Node {
+	n := &Node{node{node: map[string]*node{}}, ".", &sync.RWMutex{}}
 	for i := range rules {
 		n.Add(rules[i])
 	}
@@ -69,6 +66,9 @@ func (n *node) add(secs []string) {
 }

 func (n *Node) Match(item string) bool {
+	if n == nil {
+		return false
+	}
 	return n.matchSecs(strings.Split(n.trim(item), n.sep), false)
 }

@@ -15,14 +15,14 @@ func TestNode_Match(t *testing.T) {
 		tests []test
 	}{{
 		"simple",
-		NewNodeFromRules(".", "a.wweir.cc", "b.wweir.cc"),
+		NewNodeFromRules("a.wweir.cc", "b.wweir.cc"),
 		[]test{
 			{"a.wweir.cc", true},
 			{"b.wweir.cc", true},
 		},
 	}, {
 		"parent",
-		NewNodeFromRules(".", "wweir.cc", "a.wweir.cc"),
+		NewNodeFromRules("wweir.cc", "a.wweir.cc"),
 		[]test{
 			{"wweir.cc", true},
 			{"a.wweir.cc", true},
@@ -30,7 +30,7 @@ func TestNode_Match(t *testing.T) {
 		},
 	}, {
 		"fuzz1",
-		NewNodeFromRules(".", "wweir.cc", "a.wweir.cc", "*.wweir.cc"),
+		NewNodeFromRules("wweir.cc", "a.wweir.cc", "*.wweir.cc"),
 		[]test{
 			{"wweir.cc", true},
 			{"a.wweir.cc", true},
@@ -39,7 +39,7 @@ func TestNode_Match(t *testing.T) {
 		},
 	}, {
 		"fuzz2",
-		NewNodeFromRules(".", "a.*.cc", "c.wweir.*"),
+		NewNodeFromRules("a.*.cc", "c.wweir.*"),
 		[]test{
 			{"wweir.cc", false},
 			{"a.wweir.cc", true},
@@ -48,7 +48,7 @@ func TestNode_Match(t *testing.T) {
 		},
 	}, {
 		"fuzz3",
-		NewNodeFromRules(".", "*.*.cc", "iamp.*.*"),
+		NewNodeFromRules("*.*.cc", "iamp.*.*"),
 		[]test{
 			{"wweir.cc", false},
 			{"a.wweir.cc", true},
@@ -57,7 +57,7 @@ func TestNode_Match(t *testing.T) {
 		},
 	}, {
 		"fuzz4",
-		NewNodeFromRules(".", "**.cc", "a.**.com", "**.wweir.*"),
+		NewNodeFromRules("**.cc", "a.**.com", "**.wweir.*"),
 		[]test{
 			{"wweir.cc", true},
 			{"a.wweir.cc", true},
@@ -15,6 +15,10 @@ func (t *TeeConn) StartOrReset() {
 	t.offset = 0
 	t.tee = true
 }
+func (t *TeeConn) DropAndRestart() {
+	t.buf = []byte{}
+	t.tee = true
+}
 func (t *TeeConn) Stop() {
 	t.offset = 0
 	t.tee = false
@@ -1,30 +1,19 @@
 package util

 import (
-	"errors"
 	"net"
-	"time"
+	"strconv"
 )

-// Iface is net interface address info
-type Iface struct {
-	net.HardwareAddr
-	net.IP
-}
-
-func WithTimeout(fn func() error, timeout time.Duration) error {
-	var okCh = make(chan struct{})
-	var err error
-
-	go func() {
-		err = fn()
-		close(okCh)
-	}()
-
-	select {
-	case <-okCh:
-		return err
-	case <-time.After(timeout):
-		return errors.New("timeout: " + timeout.String())
+func ParseHostPort(addr string, defaultPort uint16) (string, uint16) {
+	h, p, err := net.SplitHostPort(addr)
+	if err != nil {
+		if defaultPort == 0 {
+			panic("parse port fail with no default, addr: " + addr)
+		}
+		return addr, defaultPort
 	}
+
+	pNum, _ := strconv.ParseUint(p, 10, 16)
+	return h, uint16(pNum)
 }