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mojocn
2024-12-02 09:43:07 +08:00
committed by JohnDoo
commit eeaf48178a
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.github/workflows/deploy.sh
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#!/bin/bash
echo "$SSH_KEY" > key.pem
chmod 600 key.pem
scp -o StrictHostKeyChecking=no -i key.pem cmd/node/unchain cmd/node/unchain.service $SSH_USER@$SSH_HOST:~
ssh -o StrictHostKeyChecking=no -i key.pem $SSH_USER@$SSH_HOST << EOF
cd ~ && pwd
sudo rm -rf /app && sudo mkdir /app
sudo mv unchain /app/unchain
sudo chmod +x /app/unchain
echo "$CONFIG_TOML" | sudo tee /app/config.toml > /dev/null
sudo mv unchain.service /etc/systemd/system/unchain.service
sudo rm -rf /etc/systemd/system/emissary.service
sudo systemctl daemon-reload
sudo systemctl stop emissary.service || true
sudo systemctl stop unchain.service || true
sudo systemctl start unchain.service
sudo systemctl status unchain.service
EOF
.github/workflows/deploy.yml
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name: Go
on:
push:
branches: [ "main" ]
pull_request:
branches: [ "main" ]
jobs:
build:
runs-on: ubuntu-latest
environment: production
env:
GIT_SHA: ${{ github.sha }}
GIT_REF_NAME: ${{ github.ref_name }}
GIT_REPO: ${{ github.repository }}
steps:
- name: Checkout code
uses: actions/checkout@v4
- name: install ssh-scp
run: sudo apt-get install -y openssh-client
- name: Set up Go
uses: actions/setup-go@v4
with:
go-version: '1.23'
- name: Get build time
id: build-time
run: echo "buildTime=$(date -u +"%Y-%m-%dT%H:%M:%SZ")" >> $GITHUB_ENV
- name: Build
env:
CGO_ENABLED: '1'
GOARCH: 'amd64'
GIT_SHA: ${{ github.sha }}
GIT_REF_NAME: ${{ github.ref_name }}
GIT_REPO: ${{ github.repository }}
run: |
echo "Building Go application with gitHash=${{ env.gitHash }} and buildTime=${{ env.buildTime }}"
go build -ldflags="-X 'github.com/unchainese/unchain/internal/global.gitHash=${{ github.sha }}' -X 'github.com/unchainese/unchain/internal/global.buildTime=${{ env.buildTime }}'" -o cmd/node/unchain cmd/node/main.go
- name: Deploy to AWS EC2
env:
SSH_HOST: ${{ secrets.EC2_HOST }}
SSH_USER: ${{ secrets.EC2_USER }}
SSH_KEY: ${{ secrets.EC2_KEY }}
CONFIG_TOML: ${{ vars.CONFIG_TOML }}
run: bash .github/workflows/deploy.sh
- name: Deploy to AliCould ECS
env:
SSH_HOST: ${{ secrets.ECS_HOST }}
SSH_USER: ${{ secrets.ECS_USER }}
SSH_KEY: ${{ secrets.ECS_KEY }}
CONFIG_TOML: ${{ vars.CONFIG_TOML }}
run: bash .github/workflows/deploy.sh
.gitignore
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.idea
*.log
LICENSE
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README.md
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# unchain
"Unchainese" – a blend of "unchain" and "Chinese" – represents breaking free from internet restrictions and embracing true digital freedom.
Unchain is design in Go to be a simple and easy to use proxy server
that can be used to bypass network restrictions,censorship and surveillance.
Unchain accepts traffic from the client eg: v2rayN,v2rayA,v2rayNG,shadowRocket etc.
Processes the traffic and forwards it to the destination server.
## Unchain Architecture
Unchain is a dead simple VLESS over websocket proxy server.
The core biz logic is only 200 lines of code. [app_ws_vless.go](/internal/node/app_ws_vless.go).
Unchain server uses a simple architecture that is VLESS over WebSocket (WS) + TLS.
```
V2rayN,V2rayA,Clash or ShadowRocket
+------------------+
| VLESS Client |
| +-----------+ |
| | TLS Layer | |
| +-----------+ |
| | WebSocket | |
| +-----------+ |
+--------|---------+
|
| Encrypted VLESS Traffic (wss://)
|
+--------------------------------------+
| Internet (TLS Secured) |
+--------------------------------------+
|
|
+-----------------------------------+
| Reverse Proxy Server |
| (e.g., Nginx or Cloudflare) |
| |
| +---------------------------+ |
| | HTTPS/TLS Termination | |
| +---------------------------+ |
| | WebSocket Proxy (wss://) | |
| +---------------------------+ |
| Forward to VLESS Server |
+------------------|----------------+
|
+--------------------------------+
| Unchain Server |
| |
| +------------------------+ |
| | WebSocket Handler | |
| +------------------------+ |
| | VLESS Core Processing | |
| +------------------------+ |
| |
| Forward Traffic to Target |
+------------------|-------------+
|
+-----------------+
| Target Server |
| or Destination |
+-----------------+
```
cmd/node/.gitignore
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config.toml
cmd/node/config.example.standalone.toml
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#
#
# Warnning use ' for string not " if you want to use deploy.sh
SubAddresses = ['n-us1.libgragen.cn:80'] # host can be visited by internet,addr of cloudflare or nginx
ListenAddr = '0.0.0.0:80' # websocket server listen address
RegisterUrl = '' #the master admin server for user auth,data traffic. can be empty if you only want to use the node for yourself
RegisterToken = ''# can be empty string if you only want to use the node for yourself
AllowUsers = '6fe57e3f-e618-4873-ba96-a76adec22ccd,6fe57e3f-e618-4873-ba96-a76adec22cce' # UUID string eg. '6fe57e3f-e618-4873-ba96-a76adec22ccd,6fe57e3f-e618-4873-ba96-a76adec22cce' can not be empty if you want to use the node for yourself in standalone mode
LogFile = '' # can be empty if you don't want to log to file, so the log will be print to stdout
DebugLevel = 'debug' # debug, info, warn, error
cmd/node/config.example.toml
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#
#
# Warnning use ' for string not " if you want to use deploy.sh
SubAddresses = ['cf-us1.libragen.cn:443', 'n-us1.libgragen.cn:80'] # hosts for generate vless URL
ListenAddr = '0.0.0.0:80' # websocket server listen address
RegisterUrl = 'https://admin.cf.workers.cn/api/nodes' #the master admin server for user auth,data traffic. can be empty if you only want to use the node for stand alone
RegisterToken = 'unchain.people.from.censorship.and.surveillance'# can be empty string if you only want to use the node for yourself
AllowUsers = '' # UUID string eg. '6fe57e3f-e618-4873-ba96-a76adec22ccd,6fe57e3f-e618-4873-ba96-a76adec22cce' can not be empty if you want to use the node for yourself in standalone mode
LogFile = 'unchain.log' # can be empty if you don't want to log to file, so the log will be print to stdout
DebugLevel = 'debug' # debug, info, warn, error
cmd/node/main.go
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package main
import (
"context"
"github.com/unchainese/unchain/internal/global"
"github.com/unchainese/unchain/internal/node"
"os"
"os/signal"
"time"
)
func main() {
c := global.Cfg()
fd := global.SetupLogger(c)
defer fd.Close()
// Channel to listen for OS signals
stop := make(chan os.Signal, 1)
signal.Notify(stop, os.Interrupt)
app := node.NewApp(c, stop)
app.PushNode()
app.PrintVLESSConnectionURLS()
go app.Run()
<-stop
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
app.Shutdown(ctx)
}
cmd/node/unchain.service
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[Unit]
Description=Emissary Proxy Node Sever of Vless over Websocket
After=network.target
[Service]
ExecStart=/app/unchain
Restart=always
User=root
WorkingDirectory=/app
[Install]
WantedBy=multi-user.target
go.mod
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module github.com/unchainese/unchain
go 1.22
require (
github.com/google/uuid v1.6.0
github.com/gorilla/websocket v1.5.3
)
require github.com/BurntSushi/toml v1.4.0
go.sum
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github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
internal/global/config.go
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package global
import (
"fmt"
"github.com/BurntSushi/toml"
"log"
"log/slog"
"strconv"
"strings"
"time"
)
type Config struct {
SubAddresses []string `desc:"sub addresses" example:"node1.xxx.cn:80,node2.xxx.cn:443"`
ListenAddr string `desc:"net listen addr" def:"0.0.0.0:80"`
RegisterUrl string `desc:"register url" def:"https://admin.unchain.people.from.censorship"`
RegisterToken string `desc:"register token" def:"unchain people from censorship and surveillance"`
AllowUsers string `desc:"allow users" def:"" example:"903bcd04-79e7-429c-bf0c-0456c7de9cdc,903bcd04-79e7-429c-bf0c-0456c7de9cd1"`
LogFile string `desc:"log file path" def:""`
DebugLevel string `desc:"debug level" def:"DEBUG"`
PushIntervalSecond int `desc:"push interval" def:"360"` //seconds
GitHash string `desc:"git hash" def:""`
BuildTime string `desc:"build time" def:""`
}
func (c Config) ListenPort() int {
parts := strings.Split(c.ListenAddr, ":")
if len(parts) < 2 {
return 80
}
iv, err := strconv.ParseInt(parts[1], 10, 32)
if err != nil {
log.Println("failed to parse port:", err)
return 80
}
return int(iv)
}
var (
gitHash string
buildTime string
)
var cfg *Config
func Cfg() *Config {
if cfg != nil {
return cfg
}
cfgIns, err := loadFromToml("config.toml")
if err != nil {
panic(err)
} else {
cfg = cfgIns
}
cfg.GitHash = gitHash
cfg.BuildTime = buildTime
return cfg
}
func loadFromToml(file string) (*Config, error) {
opt := Config{}
_, err := toml.DecodeFile(file, &opt)
if err != nil {
return nil, fmt.Errorf("failed to load config file:%s %w", file, err)
}
return &opt, nil
}
func (c Config) LogLevel() slog.Level {
l := slog.LevelDebug
switch strings.ToUpper(c.DebugLevel) {
case "DEBUG":
l = slog.LevelDebug
case "INFO":
l = slog.LevelInfo
case "WARN":
l = slog.LevelWarn
case "ERROR":
l = slog.LevelError
default:
l = slog.LevelError
}
return l
}
func (c Config) UserIDS() []string {
parts := strings.Split(c.AllowUsers, ",")
ids := make([]string, 0)
for _, uid := range parts {
uid = strings.TrimSpace(uid)
if uid != "" {
ids = append(ids, uid)
}
}
return ids
}
func (c Config) PushInterval() time.Duration {
if c.PushIntervalSecond <= 0 {
return time.Minute * 60
}
return time.Second * time.Duration(c.PushIntervalSecond)
}
internal/global/logger.go
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package global
import (
"log"
"log/slog"
"os"
)
func SetupLogger(c *Config) (fd *os.File) {
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
slog.SetLogLoggerLevel(c.LogLevel())
fd = os.Stdout
if c.LogFile != "" {
file, err := os.OpenFile(c.LogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err != nil {
log.Println("Failed to open log file:", err, c.LogFile)
} else {
fd = file
}
}
log.SetOutput(fd)
return fd
}
internal/node/app.go
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package node
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"github.com/unchainese/unchain/internal/global"
"log"
"log/slog"
"net/http"
"os"
"runtime"
"sync"
"sync/atomic"
"time"
)
type App struct {
cfg *global.Config
mu sync.Mutex
allowedUsers map[string]int64
trafficUserKB sync.Map
reqCount atomic.Int64
svr *http.Server
exitSignal chan os.Signal
}
func (app *App) httpSvr() {
mux := http.NewServeMux()
mux.HandleFunc("/wsv/{uid}", app.WsVLESS)
mux.HandleFunc("/sub/{uid}", app.Sub)
mux.HandleFunc("/ws-vless", app.WsVLESS)
mux.HandleFunc("/", app.Ping)
server := &http.Server{
Addr: app.cfg.ListenAddr,
Handler: mux,
}
app.svr = server
}
func NewApp(c *global.Config, sig chan os.Signal) *App {
app := &App{
cfg: c,
mu: sync.Mutex{},
allowedUsers: make(map[string]int64),
trafficUserKB: sync.Map{},
reqCount: atomic.Int64{},
exitSignal: sig,
svr: nil,
}
for _, userID := range c.UserIDS() {
app.allowedUsers[userID] = 1
}
app.httpSvr()
go app.loopPush()
return app
}
func (app *App) Run() {
log.Println("server starting on http://", app.cfg.ListenAddr)
if err := app.svr.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
log.Fatalf("Could not listen on %s: %v\n", app.cfg.ListenAddr, err)
}
}
func (app *App) PrintVLESSConnectionURLS() {
listenPort := app.cfg.ListenPort()
fmt.Printf("\n\n\nvist to get VLESS connection info: http://127.0.0.1:%d/sub/<YOUR_CONFIGED_UUID> \n", listenPort)
fmt.Printf("vist to get VLESS connection info: http://<HOST>:%d/sub/<YOUR_UUID>\n", listenPort)
for userID, _ := range app.allowedUsers {
fmt.Println("\n------------- USER UUID: ", userID, " -------------")
urls := app.vlessUrls(userID)
for _, url := range urls {
fmt.Println(url)
}
}
fmt.Println("\n\n\n")
}
func (app *App) Shutdown(ctx context.Context) {
log.Println("Shutting down the server...")
if err := app.svr.Shutdown(ctx); err != nil {
log.Fatalf("Server forced to shutdown: %v", err)
}
log.Println("Server exiting")
}
func (app *App) loopPush() {
url := app.cfg.RegisterUrl
if url == "" {
log.Println("Register url is empty, skip register, runs in standalone mode")
return
}
tk := time.NewTicker(app.cfg.PushInterval())
defer tk.Stop()
for {
select {
case sig := <-app.exitSignal:
app.exitSignal <- sig
app.PushNode() //last push
return
case <-tk.C:
app.PushNode()
}
}
}
func (app *App) reqInc() {
app.reqCount.Add(1)
}
func (app *App) trafficInc(uid string, byteN int64) {
kb := byteN/1024 + 1 //floor
value, ok := app.trafficUserKB.Load(uid)
if !ok {
app.trafficUserKB.Store(uid, kb)
return
}
app.trafficUserKB.Store(uid, value.(int64)+kb)
}
func (app *App) stat() *AppStat {
data := make(map[string]int64)
app.trafficUserKB.Range(func(key, value interface{}) bool {
data[key.(string)] = value.(int64)
return true
})
app.trafficUserKB.Clear()
hostname, err := os.Hostname()
if err != nil {
hostname = "unknown"
slog.Error(err.Error())
}
res := &AppStat{
Traffic: data,
Hostname: hostname,
ReqCount: app.reqCount.Load(),
Goroutine: int64(runtime.NumGoroutine()),
VersionInfo: app.cfg.GitHash + " -> " + app.cfg.BuildTime,
}
res.SubAddresses = app.cfg.SubAddresses
app.reqCount.Store(0)
return res
}
type AppStat struct {
Traffic map[string]int64 `json:"traffic"`
Hostname string `json:"hostname"`
SubAddresses []string `json:"sub_addresses"`
ReqCount int64 `json:"req_count"`
Goroutine int64 `json:"goroutine"`
VersionInfo string `json:"version_info"`
}
func (app *App) PushNode() {
url := app.cfg.RegisterUrl
if url == "" {
return
}
args := app.stat()
body := bytes.NewBuffer(nil)
err := json.NewEncoder(body).Encode(args)
if err != nil {
log.Println("Error encoding request:", err)
return
}
req, err := http.NewRequest("POST", url, body)
if err != nil {
log.Println("Error registering:", err)
return
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", app.cfg.RegisterToken)
resp, err := http.DefaultClient.Do(req)
if err != nil {
log.Println("Error registering:", err)
return
}
defer resp.Body.Close()
users := make(map[string]int64)
err = json.NewDecoder(resp.Body).Decode(&users)
if err != nil {
log.Println("Error decoding response:", err)
return
}
app.mu.Lock()
app.allowedUsers = users
app.mu.Unlock()
}
func (app *App) IsUserNotAllowed(uuid string) (isNotAllowed bool) {
app.mu.Lock()
defer app.mu.Unlock()
_, ok := app.allowedUsers[uuid]
if !ok {
log.Println("Unauthorized user:", uuid)
return true
}
return false
}
internal/node/app_ping.go
+31
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@@ -0,0 +1,31 @@
package node
import (
"encoding/json"
"net/http"
"strings"
)
func (app *App) Stat(w http.ResponseWriter, _ *http.Request) {
all, err := json.Marshal(app.stat())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
//json response hello world
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(all)
}
func (app *App) Ping(w http.ResponseWriter, _ *http.Request) {
//json response hello world
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusOK)
lines := []string{
"BUILT HASH: https://github.com/unchainese/unchain/tree/" + app.cfg.GitHash,
"BUILT TIME: " + app.cfg.BuildTime,
}
w.Write([]byte(strings.Join(lines, "\n\n")))
}
internal/node/app_sub.go
+99
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@@ -0,0 +1,99 @@
package node
import (
"fmt"
"math/rand"
"net/http"
"net/url"
"strings"
)
//vless://6fe57e3f-e618-4873-ba96-a76ad1112ccd@felix-us.xxx.cn:443?
//encryption=none&
//security=tls&
//sni=felix-us.xxx.cn&
//allowInsecure=1&
//type=ws&
//hostSni=felix-us.xxx.cn
//&path=%2Fws-vless%3Fed%3D2560
//#felix-us.xxx.cn
// vless://6fe57e3f-e618-4873-ba96-a76ad1112ccd@aws.xxx.cn:80?encryption=none&security=none&sni=s5cf.xxx.cn&allowInsecure=1
// &type=ws
// &hostSni=aws.xxx.cn&path=%2Fws-vless%3Fed%3D2560#locaol-clone
type vlessSub struct {
remark string
addrWithPort string //eg node.cloudflare.cn:443 or node.cloudflare.cn:80
UID string
path string //eg /ws-vless?ed=2560
}
func (s vlessSub) vlessURL(hostSni string, isTLS bool) string {
u := url.Values{
"encryption": {"none"},
"allowInsecure": {"1"},
"type": {"ws"},
"path": {s.path},
}
if hostSni != "" {
u["host"] = []string{hostSni}
u["sni"] = []string{hostSni}
}
if !isTLS {
u["security"] = []string{"none"}
u.Del("sni")
} else {
u["security"] = []string{"tls"}
}
//&security=none&allowInsecure=1&type=ws&path=#n-cn1.libgragen.cn%3A80
return fmt.Sprintf("vless://%s@%s?%s#%s", s.UID, s.addrWithPort, u.Encode(), s.remark)
}
func (app *App) Sub(w http.ResponseWriter, r *http.Request) {
uid := r.PathValue("uid")
if app.IsUserNotAllowed(uid) {
http.Error(w, "Unauthorized", http.StatusUnauthorized)
return
}
subURLs := app.vlessUrls(uid)
//json response hello world
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusOK)
lines := []string{
app.cfg.GitHash,
app.cfg.BuildTime,
"VLESS Subscription URL:",
}
lines = append(lines, subURLs...)
w.Write([]byte(strings.Join(lines, "\n\n")))
}
func (app *App) vlessUrls(uid string) []string {
var subURLs []string
for _, subAddr := range app.cfg.SubAddresses {
sub := vlessSub{
remark: subAddr,
addrWithPort: subAddr,
UID: uid,
path: "/wsv/" + uid + "?ed=2560",
}
isTLS := strings.HasSuffix(subAddr, ":443")
subURL := sub.vlessURL("", isTLS)
subURLs = append(subURLs, subURL)
}
return subURLs
}
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
func randomString(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = letterBytes[rand.Intn(len(letterBytes))]
}
return string(b)
}
internal/node/app_ws_vless.go
+203
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@@ -0,0 +1,203 @@
package node
import (
"context"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"github.com/gorilla/websocket"
"github.com/unchainese/unchain/internal/schema"
"io"
"log"
"net"
"net/http"
"sync"
"sync/atomic"
"time"
)
const buffSize = 8 << 10
var upGrader = websocket.Upgrader{
ReadBufferSize: buffSize,
WriteBufferSize: buffSize,
CheckOrigin: func(r *http.Request) bool {
// Allow all connections by default
return true
},
}
func startDstConnection(vd *schema.ProtoVLESS, timeout time.Duration) (net.Conn, []byte, error) {
conn, err := net.DialTimeout(vd.DstProtocol, vd.HostPort(), timeout)
if err != nil {
return nil, nil, fmt.Errorf("connecting to destination: %w", err)
}
return conn, []byte{vd.Version, 0x00}, nil
}
func (app *App) WsVLESS(w http.ResponseWriter, r *http.Request) {
app.reqInc()
uid := r.PathValue("uid")
//check can upgrade websocket
if r.Header.Get("Upgrade") != "websocket" {
//json response hello world
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
data := map[string]string{"msg": "pong", "uid": uid}
json.NewEncoder(w).Encode(data)
return
}
ctx := r.Context()
earlyDataHeader := r.Header.Get("sec-websocket-protocol")
earlyData, err := base64.RawURLEncoding.DecodeString(earlyDataHeader)
if err != nil {
log.Println("Error decoding early data:", err)
}
ws, err := upGrader.Upgrade(w, r, nil)
if err != nil {
fmt.Println("Error upgrading to websocket:", err)
return
}
defer ws.Close()
if len(earlyData) == 0 {
mt, p, err := ws.ReadMessage()
if err != nil {
log.Println("Error reading message:", err)
return
}
if mt == websocket.BinaryMessage {
earlyData = p
}
}
vData, err := schema.VlessParse(earlyData)
if err != nil {
log.Println("Error parsing vless data:", err)
return
}
if app.IsUserNotAllowed(vData.UUID()) {
return
}
sessionTrafficByteN := int64(len(earlyData))
if vData.DstProtocol == "udp" {
sessionTrafficByteN += vlessUDP(ctx, vData, ws)
} else if vData.DstProtocol == "tcp" {
sessionTrafficByteN += vlessTCP(ctx, vData, ws)
}
app.trafficInc(vData.UUID(), sessionTrafficByteN)
}
func vlessTCP(_ context.Context, sv *schema.ProtoVLESS, ws *websocket.Conn) int64 {
logger := sv.Logger()
conn, headerVLESS, err := startDstConnection(sv, time.Millisecond*1000)
if err != nil {
logger.Error("Error starting session:", "err", err)
return 0
}
defer conn.Close()
logger.Info("Session started tcp")
//write early data
_, err = conn.Write(sv.DataTcp())
if err != nil {
logger.Error("Error writing early data to TCP connection:", "err", err)
return 0
}
var trafficMeter atomic.Int64
var wg sync.WaitGroup
wg.Add(2)
go func() {
defer wg.Done()
for {
mt, message, err := ws.ReadMessage()
trafficMeter.Add(int64(len(message)))
if websocket.IsCloseError(err, websocket.CloseNormalClosure) {
return
}
if err != nil {
logger.Error("Error reading message:", "err", err)
return
}
if mt != websocket.BinaryMessage {
continue
}
_, err = conn.Write(message)
if err != nil {
logger.Error("Error writing to TCP connection:", "err", err)
return
}
}
}()
go func() {
defer wg.Done()
hasNotSentHeader := true
buf := make([]byte, buffSize)
for {
n, err := conn.Read(buf)
trafficMeter.Add(int64(n))
if errors.Is(err, io.EOF) {
return
}
if err != nil {
logger.Error("Error reading from TCP connection:", "err", err)
return
}
data := buf[:n]
// send header data only for the first time
if hasNotSentHeader {
hasNotSentHeader = false
data = append(headerVLESS, data...)
}
err = ws.WriteMessage(websocket.BinaryMessage, data)
if err != nil {
logger.Error("Error writing to websocket:", "err", err)
return
}
}
}()
wg.Wait()
return trafficMeter.Load()
}
func vlessUDP(_ context.Context, sv *schema.ProtoVLESS, ws *websocket.Conn) (trafficMeter int64) {
logger := sv.Logger()
conn, headerVLESS, err := startDstConnection(sv, time.Millisecond*1000)
if err != nil {
logger.Error("Error starting session:", "err", err)
return
}
defer conn.Close()
trafficMeter += int64(len(sv.DataUdp()))
//write early data
_, err = conn.Write(sv.DataUdp())
if err != nil {
logger.Error("Error writing early data to TCP connection:", "err", err)
return
}
buf := make([]byte, buffSize)
n, err := conn.Read(buf)
if err != nil {
logger.Error("Error reading from TCP connection:", "err", err)
return
}
udpDataLen1 := (n >> 8) & 0xff
udpDataLen2 := n & 0xff
headerVLESS = append(headerVLESS, byte(udpDataLen1), byte(udpDataLen2))
headerVLESS = append(headerVLESS, buf[:n]...)
trafficMeter += int64(len(headerVLESS))
err = ws.WriteMessage(websocket.BinaryMessage, headerVLESS)
if err != nil {
logger.Error("Error writing to websocket:", "err", err)
return
}
return trafficMeter
}
internal/schema/trojan.go
+86
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@@ -0,0 +1,86 @@
package schema
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"net"
)
// ProtoTrojan is the structure of trojan protocol
// https://github.com/trojan-gfw/trojan/blob/master/docs/protocol.md
type ProtoTrojan struct {
sha224password []byte //trojan password
DstProtocol string //tcp or udp
dstHost string
dstHostType string //ipv6 or ipv4,domain
dstPort uint16
Version byte
payload []byte
}
const (
byteCR = '\r'
byteLF = '\n'
)
func parseTrojanHeader(buffer []byte) (*ProtoTrojan, error) {
if len(buffer) < 56 {
return nil, errors.New("invalid data")
}
bytes.Split(buffer, []byte{byteCR, byteLF})
crLfIndex := 56
if buffer[56] != byteCR || buffer[57] != byteLF {
return nil, errors.New("invalid header format (missing CR LF)")
}
p := &ProtoTrojan{
sha224password: buffer[:crLfIndex],
}
socks5DataBuffer := buffer[crLfIndex+2:]
if len(socks5DataBuffer) < 6 {
return nil, errors.New("invalid SOCKS5 request data")
}
cmd := socks5DataBuffer[0]
if cmd == 0x01 { //connect
p.DstProtocol = "tcp"
} else if cmd == 0x03 { //udp
p.DstProtocol = "udp"
//todo:: udp
} else {
return nil, errors.New("unsupported command, only TCP (CONNECT) is allowed")
}
atype := socks5DataBuffer[1]
var addressLength int
addressIndex := 2
switch atype {
case 1:
addressLength = 4
ip := net.IP(socks5DataBuffer[addressIndex : addressIndex+addressLength])
p.dstHost = ip.String()
p.dstHostType = "ipv4"
p.dstPort = binary.BigEndian.Uint16(socks5DataBuffer[addressIndex+addressLength : addressIndex+addressLength+2])
p.payload = socks5DataBuffer[addressIndex+addressLength+4:]
case 3: //domain
addressLength = int(socks5DataBuffer[addressIndex])
addressIndex++
p.dstHostType = "domain"
p.dstHost = string(socks5DataBuffer[addressIndex : addressIndex+addressLength])
p.dstPort = binary.BigEndian.Uint16(socks5DataBuffer[addressIndex+addressLength : addressIndex+addressLength+2])
p.payload = socks5DataBuffer[addressIndex+addressLength+4:]
case 4:
addressLength = 16
ip := net.IP(socks5DataBuffer[addressIndex : addressIndex+addressLength])
p.dstPort = binary.BigEndian.Uint16(socks5DataBuffer[addressIndex+addressLength : addressIndex+addressLength+2])
p.dstHost = ip.String()
p.dstHostType = "ipv6"
p.payload = socks5DataBuffer[addressIndex+addressLength+4:]
default:
return nil, fmt.Errorf("invalid addressType is %d", atype)
}
return p, nil
}
internal/schema/vless.go
+152
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@@ -0,0 +1,152 @@
package schema
import (
"bytes"
"crypto/sha256"
"encoding/binary"
"errors"
"fmt"
"github.com/google/uuid"
"log/slog"
"net"
)
type ProtoVLESS struct {
userID uuid.UUID
DstProtocol string //tcp or udp
dstHost string
dstHostType string //ipv6 or ipv4,domain
dstPort uint16
Version byte
payload []byte
}
func (p ProtoTrojan) AuthUser(password string) (isOk bool) {
sha224Hash := sha256.New224()
sha224Hash.Write([]byte(password))
sha224Sum := sha224Hash.Sum(nil) //28 bytes
hexSha224Bytes := []byte(fmt.Sprintf("%x", sha224Sum))
return bytes.Equal(p.sha224password, hexSha224Bytes)
}
func (h ProtoVLESS) UUID() string {
return h.userID.String()
}
func (h ProtoVLESS) DataUdp() []byte {
allData := make([]byte, 0)
chunk := h.payload
for index := 0; index < len(chunk); {
if index+2 > len(chunk) {
fmt.Println("Incomplete length buffer")
return nil
}
lengthBuffer := chunk[index : index+2]
udpPacketLength := binary.BigEndian.Uint16(lengthBuffer)
if index+2+int(udpPacketLength) > len(chunk) {
fmt.Println("Incomplete UDP packet")
return nil
}
udpData := chunk[index+2 : index+2+int(udpPacketLength)]
index = index + 2 + int(udpPacketLength)
allData = append(allData, udpData...)
}
return allData
}
func (h ProtoVLESS) DataTcp() []byte {
return h.payload
}
func (h ProtoVLESS) AddrUdp() *net.UDPAddr {
return &net.UDPAddr{IP: h.HostIP(), Port: int(h.dstPort)}
}
func (h ProtoVLESS) HostIP() net.IP {
ip := net.ParseIP(h.dstHost)
if ip == nil {
ips, err := net.LookupIP(h.dstHost)
if err != nil {
h.Logger().Error("failed to resolve domain", "err", err.Error())
return net.IPv4zero
}
if len(ips) == 0 {
return net.IPv4zero
}
return ips[0]
}
return ip
}
func (h ProtoVLESS) HostPort() string {
return net.JoinHostPort(h.dstHost, fmt.Sprintf("%d", h.dstPort))
}
func (h ProtoVLESS) Logger() *slog.Logger {
return slog.With("userID", h.userID.String(), "network", h.DstProtocol, "addr", h.HostPort())
}
// VlessParse https://xtls.github.io/development/protocols/vless.html
func VlessParse(buf []byte) (*ProtoVLESS, error) {
payload := &ProtoVLESS{
userID: uuid.Nil,
DstProtocol: "",
dstHost: "",
dstPort: 0,
Version: 0,
payload: nil,
}
if len(buf) < 24 {
return payload, errors.New("invalid payload length")
}
payload.Version = buf[0]
payload.userID = uuid.Must(uuid.FromBytes(buf[1:17]))
extraInfoProtoBufLen := buf[17]
command := buf[18+extraInfoProtoBufLen]
switch command {
case 1:
payload.DstProtocol = "tcp"
case 2:
payload.DstProtocol = "udp"
default:
return payload, fmt.Errorf("command %d is not supported, command 01-tcp, 02-udp, 03-mux", command)
}
portIndex := 18 + extraInfoProtoBufLen + 1
payload.dstPort = binary.BigEndian.Uint16(buf[portIndex : portIndex+2])
addressIndex := portIndex + 2
addressType := buf[addressIndex]
addressValueIndex := addressIndex + 1
switch addressType {
case 1: // IPv4
if len(buf) < int(addressValueIndex+net.IPv4len) {
return nil, fmt.Errorf("invalid IPv4 address length")
}
payload.dstHost = net.IP(buf[addressValueIndex : addressValueIndex+net.IPv4len]).String()
payload.payload = buf[addressValueIndex+net.IPv4len:]
payload.dstHostType = "ipv4"
case 2: // domain
addressLength := buf[addressValueIndex]
addressValueIndex++
if len(buf) < int(addressValueIndex)+int(addressLength) {
return nil, fmt.Errorf("invalid domain address length")
}
payload.dstHost = string(buf[addressValueIndex : int(addressValueIndex)+int(addressLength)])
payload.payload = buf[int(addressValueIndex)+int(addressLength):]
payload.dstHostType = "domain"
case 3: // IPv6
if len(buf) < int(addressValueIndex+net.IPv6len) {
return nil, fmt.Errorf("invalid IPv6 address length")
}
payload.dstHost = net.IP(buf[addressValueIndex : addressValueIndex+net.IPv6len]).String()
payload.payload = buf[addressValueIndex+net.IPv6len:]
payload.dstHostType = "ipv6"
default:
return nil, fmt.Errorf("addressType %d is not supported", addressType)
}
return payload, nil
}