Merge branch 'master' into wip-udp-hop

.github/workflows/build-master.yml

@@ -1,45 +0,0 @@
-name: Build master
-
-on:
-  push:
-    branches:
-      - 'master'
-    tags-ignore:
-      - 'v*'
-
-jobs:
-
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    env:
-      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
-
-    steps:
-
-      - name: Check out
-        uses: actions/checkout@v3
-
-      - name: Get time
-        uses: gerred/actions/current-time@master
-        id: current-time
-
-      - name: Build
-        uses: tobyxdd/go-cross-build@d00fc41eb205f57dd90f6e5af4613e21c7ebe73f
-        env:
-          TIME: "${{ steps.current-time.outputs.time }}"
-          GOFLAGS: "-tags=gpl"
-          CGO_ENABLED: "0"
-        with:
-          name: hysteria
-          dest: dist
-          ldflags: -w -s -X main.appCommit=${{ github.sha }} -X main.appDate=${{ env.TIME }}
-          platforms: 'darwin/amd64, darwin/arm64, windows/amd64, windows/386, linux/amd64, linux/386, linux/arm, linux/arm64, linux/s390x, linux/mipsle, freebsd/amd64, freebsd/386, freebsd/arm, freebsd/arm64'
-          package: cmd
-          compress: false
-
-      - name: Archive
-        uses: actions/upload-artifact@v3
-        with:
-          name: dist
-          path: dist

.github/workflows/dev-build-master.yml

@@ -0,0 +1,38 @@
+name: "Build master"
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags-ignore:
+      - 'v*'
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    env:
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
+
+    steps:
+
+      - name: Check out
+        uses: actions/checkout@v3
+
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+
+      - name: Run build script
+        env:
+          HY_APP_PLATFORMS: 'darwin/amd64,darwin/arm64,windows/amd64,windows/386,linux/amd64,linux/386,linux/arm,linux/arm64,linux/s390x,linux/mipsle,freebsd/amd64,freebsd/386,freebsd/arm,freebsd/arm64'
+        run: ./build.sh
+        shell: bash
+
+      - name: Archive
+        uses: actions/upload-artifact@v3
+        with:
+          name: hysteria-binaries-${{ github.sha }}
+          path: ./build

.github/workflows/release-docker.yaml

@@ -16,8 +16,8 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Get tag
-        uses: olegtarasov/get-tag@v2
-        id: tagName
+        id: get_tag
+        run: echo ::set-output name=tag::${GITHUB_REF#refs/tags/}
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -38,7 +38,7 @@ jobs:
           context: .
           push: true
           platforms: linux/amd64,linux/arm64
-          tags: tobyxdd/hysteria:latest,tobyxdd/hysteria:${{ env.GIT_TAG_NAME }}
+          tags: tobyxdd/hysteria:latest,tobyxdd/hysteria:${{ steps.get_tag.outputs.tag }}
 
       - name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}

.github/workflows/release.yml

@@ -18,31 +18,20 @@ jobs:
       - name: Check out
         uses: actions/checkout@v3
 
-      - name: Get tag
-        uses: olegtarasov/get-tag@v2
-        id: tagName
-
-      - name: Get time
-        uses: gerred/actions/current-time@master
-        id: current-time
-
-      - name: Build
-        uses: tobyxdd/go-cross-build@d00fc41eb205f57dd90f6e5af4613e21c7ebe73f
-        env:
-          TIME: "${{ steps.current-time.outputs.time }}"
-          GOFLAGS: "-tags=gpl"
-          CGO_ENABLED: "0"
+      - name: Setup Go
+        uses: actions/setup-go@v3
         with:
-          name: hysteria
-          dest: dist
-          ldflags: -w -s -X main.appVersion=${{ env.GIT_TAG_NAME }} -X main.appCommit=${{ github.sha }} -X main.appDate=${{ env.TIME }}
-          platforms: 'darwin/amd64, darwin/arm64, windows/amd64, windows/386, linux/amd64, linux/386, linux/arm, linux/arm64, linux/s390x, linux/mipsle, freebsd/amd64, freebsd/386, freebsd/arm, freebsd/arm64'
-          package: cmd
-          compress: false
+          go-version: 1.19
+
+      - name: Run build script
+        env:
+          HY_APP_PLATFORMS: 'darwin/amd64,darwin/arm64,windows/amd64,windows/386,linux/amd64,linux/386,linux/arm,linux/arm64,linux/s390x,linux/mipsle,freebsd/amd64,freebsd/386,freebsd/arm,freebsd/arm64'
+        run: ./build.sh
+        shell: bash
 
       - name: Generate hashes
         run: |
-          cd dist
+          cd build
           for f in $(find . -type f); do
             sha256sum $f | sudo tee -a hashes.txt
           done
@@ -52,18 +41,18 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         with:
           files: |
-            ./dist/hysteria-darwin-amd64
-            ./dist/hysteria-darwin-arm64
-            ./dist/hysteria-windows-amd64.exe
-            ./dist/hysteria-windows-386.exe
-            ./dist/hysteria-linux-amd64
-            ./dist/hysteria-linux-386
-            ./dist/hysteria-linux-arm
-            ./dist/hysteria-linux-arm64
-            ./dist/hysteria-linux-s390x
-            ./dist/hysteria-linux-mipsle
-            ./dist/hysteria-freebsd-amd64
-            ./dist/hysteria-freebsd-386
-            ./dist/hysteria-freebsd-arm
-            ./dist/hysteria-freebsd-arm64
-            ./dist/hashes.txt
+            ./build/hysteria-darwin-amd64
+            ./build/hysteria-darwin-arm64
+            ./build/hysteria-windows-amd64.exe
+            ./build/hysteria-windows-386.exe
+            ./build/hysteria-linux-amd64
+            ./build/hysteria-linux-386
+            ./build/hysteria-linux-arm
+            ./build/hysteria-linux-arm64
+            ./build/hysteria-linux-s390x
+            ./build/hysteria-linux-mipsle
+            ./build/hysteria-freebsd-amd64
+            ./build/hysteria-freebsd-386
+            ./build/hysteria-freebsd-arm
+            ./build/hysteria-freebsd-arm64
+            ./build/hashes.txt

Dockerfile

@@ -11,17 +11,12 @@ ENV GOPROXY ${GOPROXY}
 
 COPY . /go/src/github.com/hynetwork/hysteria
 
-WORKDIR /go/src/github.com/hynetwork/hysteria/cmd
+WORKDIR /go/src/github.com/hynetwork/hysteria
 
 RUN set -ex \
     && apk add git build-base \
-    && export VERSION=$(git describe --tags) \
-    && export COMMIT=$(git rev-parse HEAD) \
-    && export TIMESTAMP=$(date "+%F %T") \
-    && go build -trimpath -o /go/bin/hysteria -ldflags \
-        "-w -s -X 'main.appVersion=${VERSION}' \
-        -X 'main.appCommit=${COMMIT}' \
-        -X 'main.appDate=${TIMESTAMP}'"
+    && ./build.sh \
+    && mv ./build/hysteria-* /go/bin/hysteria
 
 # multi-stage builds to create the final image
 FROM alpine AS dist

build.ps1

@@ -0,0 +1,69 @@
+# Hysteria build script for Windows (PowerShell)
+
+# Environment variable options:
+#   - HY_APP_VERSION: App version
+#   - HY_APP_COMMIT: App commit hash
+#   - HY_APP_PLATFORMS: Platforms to build for (e.g. "windows/amd64,linux/amd64,darwin/amd64")
+
+if (!(Get-Command go -ErrorAction SilentlyContinue)) {
+    Write-Host "Error: go is not installed." -ForegroundColor Red
+    exit 1
+}
+
+if (!(Get-Command git -ErrorAction SilentlyContinue)) {
+    Write-Host "Error: git is not installed." -ForegroundColor Red
+    exit 1
+}
+if (!(git rev-parse --is-inside-work-tree 2>$null)) {
+    Write-Host "Error: not in a git repository." -ForegroundColor Red
+    exit 1
+}
+
+$ldflags = "-s -w -X 'main.appDate=$(Get-Date -Format "yyyy-MM-dd HH:mm:ss")'"
+if ($env:HY_APP_VERSION) {
+    $ldflags += " -X 'main.appVersion=$($env:HY_APP_VERSION)'"
+}
+else {
+    $ldflags += " -X 'main.appVersion=$(git describe --tags --always)'"
+}
+if ($env:HY_APP_COMMIT) {
+    $ldflags += " -X 'main.appCommit=$($env:HY_APP_COMMIT)'"
+}
+else {
+    $ldflags += " -X 'main.appCommit=$(git rev-parse HEAD)'"
+}
+
+if ($env:HY_APP_PLATFORMS) {
+    $platforms = $env:HY_APP_PLATFORMS.Split(",")
+}
+else {
+    $goos = go env GOOS
+    $goarch = go env GOARCH
+    $platforms = @("$goos/$goarch")
+}
+
+if (Test-Path build) {
+    Remove-Item -Recurse -Force build
+}
+New-Item -ItemType Directory -Force -Path build
+
+Write-Host "Starting build..." -ForegroundColor Green
+
+foreach ($platform in $platforms) {
+    $env:GOOS = $platform.Split("/")[0]
+    $env:GOARCH = $platform.Split("/")[1]
+    Write-Host "Building $env:GOOS/$env:GOARCH" -ForegroundColor Green
+    $output = "build/hysteria-$env:GOOS-$env:GOARCH"
+    if ($env:GOOS -eq "windows") {
+        $output = "$output.exe"
+    }
+    go build -o $output -tags=gpl -ldflags $ldflags -trimpath ./cmd/
+    if ($LastExitCode -ne 0) {
+        Write-Host "Error: failed to build $env:GOOS/$env:GOARCH" -ForegroundColor Red
+        exit 1
+    }
+}
+
+Write-Host "Build complete." -ForegroundColor Green
+
+Get-ChildItem -Path build | Format-Table -AutoSize

build.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# Hysteria build script for Linux
+# Environment variable options:
+#   - HY_APP_VERSION: App version
+#   - HY_APP_COMMIT: App commit hash
+#   - HY_APP_PLATFORMS: Platforms to build for (e.g. "windows/amd64,linux/amd64,darwin/amd64")
+
+if ! [ -x "$(command -v go)" ]; then
+    echo 'Error: go is not installed.' >&2
+    exit 1
+fi
+
+if ! [ -x "$(command -v git)" ]; then
+    echo 'Error: git is not installed.' >&2
+    exit 1
+fi
+if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+    echo 'Error: not in a git repository.' >&2
+    exit 1
+fi
+
+ldflags="-s -w -X 'main.appDate=$(date -u '+%F %T')'"
+if [ -n "$HY_APP_VERSION" ]; then
+    ldflags="$ldflags -X 'main.appVersion=$HY_APP_VERSION'"
+else
+    ldflags="$ldflags -X 'main.appVersion=$(git describe --tags --always)'"
+fi
+if [ -n "$HY_APP_COMMIT" ]; then
+    ldflags="$ldflags -X 'main.appCommit=$HY_APP_COMMIT'"
+else
+    ldflags="$ldflags -X 'main.appCommit=$(git rev-parse HEAD)'"
+fi
+
+if [ -z "$HY_APP_PLATFORMS" ]; then
+    HY_APP_PLATFORMS="$(go env GOOS)/$(go env GOARCH)"
+fi
+platforms=(${HY_APP_PLATFORMS//,/ })
+
+mkdir -p build
+rm -rf build/*
+
+echo "Starting build..."
+
+for platform in "${platforms[@]}"; do
+    GOOS=${platform%/*}
+    GOARCH=${platform#*/}
+    echo "Building $GOOS/$GOARCH"
+    output="build/hysteria-$GOOS-$GOARCH"
+    if [ $GOOS = "windows" ]; then
+        output="$output.exe"
+    fi
+    env GOOS=$GOOS GOARCH=$GOARCH go build -o $output -tags=gpl -ldflags "$ldflags" -trimpath ./cmd/
+    if [ $? -ne 0 ]; then
+        echo "Error: failed to build $GOOS/$GOARCH"
+        exit 1
+    fi
+done
+
+echo "Build complete."
+
+ls -lh build/ | awk '{print $9, $5}'

cmd/client.go

@@ -40,6 +40,7 @@ var clientPacketConnFuncFactoryMap = map[string]pktconns.ClientPacketConnFuncFac
 
 func client(config *clientConfig) {
 	logrus.WithField("config", config.String()).Info("Client configuration loaded")
+	config.Fill() // Fill default values
 	// Resolver
 	if len(config.Resolver) > 0 {
 		err := setResolver(config.Resolver)
@@ -51,15 +52,11 @@ func client(config *clientConfig) {
 	}
 	// TLS
 	tlsConfig := &tls.Config{
+		NextProtos:         []string{config.ALPN},
 		ServerName:         config.ServerName,
 		InsecureSkipVerify: config.Insecure,
 		MinVersion:         tls.VersionTLS13,
 	}
-	if config.ALPN != "" {
-		tlsConfig.NextProtos = []string{config.ALPN}
-	} else {
-		tlsConfig.NextProtos = []string{DefaultALPN}
-	}
 	// Load CA
 	if len(config.CustomCA) > 0 {
 		bs, err := ioutil.ReadFile(config.CustomCA)
@@ -84,24 +81,11 @@ func client(config *clientConfig) {
 		InitialConnectionReceiveWindow: config.ReceiveWindow,
 		MaxConnectionReceiveWindow:     config.ReceiveWindow,
 		HandshakeIdleTimeout:           time.Duration(config.HandshakeTimeout) * time.Second,
+		MaxIdleTimeout:                 time.Duration(config.IdleTimeout) * time.Second,
+		KeepAlivePeriod:                time.Duration(config.IdleTimeout) * time.Second * 2 / 5,
 		DisablePathMTUDiscovery:        config.DisableMTUDiscovery,
 		EnableDatagrams:                true,
 	}
-	if config.IdleTimeout == 0 {
-		quicConfig.MaxIdleTimeout = DefaultClientMaxIdleTimeout
-		quicConfig.KeepAlivePeriod = DefaultClientKeepAlivePeriod
-	} else {
-		quicConfig.MaxIdleTimeout = time.Duration(config.IdleTimeout) * time.Second
-		quicConfig.KeepAlivePeriod = quicConfig.MaxIdleTimeout * 2 / 5
-	}
-	if config.ReceiveWindowConn == 0 {
-		quicConfig.InitialStreamReceiveWindow = DefaultStreamReceiveWindow
-		quicConfig.MaxStreamReceiveWindow = DefaultStreamReceiveWindow
-	}
-	if config.ReceiveWindow == 0 {
-		quicConfig.InitialConnectionReceiveWindow = DefaultConnectionReceiveWindow
-		quicConfig.MaxConnectionReceiveWindow = DefaultConnectionReceiveWindow
-	}
 	if !quicConfig.DisablePathMTUDiscovery && pmtud.DisablePathMTUDiscovery {
 		logrus.Info("Path MTU Discovery is not yet supported on this platform")
 	}
@@ -136,11 +120,7 @@ func client(config *clientConfig) {
 		var err error
 		aclEngine, err = acl.LoadFromFile(config.ACL, transport.DefaultClientTransport.ResolveIPAddr,
 			func() (*geoip2.Reader, error) {
-				if len(config.MMDB) > 0 {
-					return loadMMDBReader(config.MMDB)
-				} else {
-					return loadMMDBReader(DefaultMMDBFilename)
-				}
+				return loadMMDBReader(config.MMDB)
 			})
 		if err != nil {
 			logrus.WithFields(logrus.Fields{

cmd/config.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"regexp"
 	"strconv"
-	"time"
 
 	"github.com/sirupsen/logrus"
 	"github.com/yosuke-furukawa/json5/encoding/json5"
@@ -15,17 +14,16 @@ const (
 	mbpsToBps   = 125000
 	minSpeedBPS = 16384
 
+	DefaultALPN = "hysteria"
+
 	DefaultStreamReceiveWindow     = 15728640 // 15 MB/s
 	DefaultConnectionReceiveWindow = 67108864 // 64 MB/s
 	DefaultMaxIncomingStreams      = 1024
 
-	DefaultALPN = "hysteria"
-
 	DefaultMMDBFilename = "GeoLite2-Country.mmdb"
 
-	ServerMaxIdleTimeout         = 60 * time.Second
-	DefaultClientMaxIdleTimeout  = 20 * time.Second
-	DefaultClientKeepAlivePeriod = 8 * time.Second
+	ServerMaxIdleTimeoutSec     = 60
+	DefaultClientIdleTimeoutSec = 20
 )
 
 var rateStringRegexp = regexp.MustCompile(`^(\d+)\s*([KMGT]?)([Bb])ps$`)
@@ -98,10 +96,10 @@ func (c *serverConfig) Speed() (uint64, uint64, error) {
 
 func (c *serverConfig) Check() error {
 	if len(c.Listen) == 0 {
-		return errors.New("no listen address")
+		return errors.New("missing listen address")
 	}
 	if len(c.ACME.Domains) == 0 && (len(c.CertFile) == 0 || len(c.KeyFile) == 0) {
-		return errors.New("ACME domain or TLS cert not provided")
+		return errors.New("need either ACME info or cert/key files")
 	}
 	if up, down, err := c.Speed(); err != nil || (up != 0 && up < minSpeedBPS) || (down != 0 && down < minSpeedBPS) {
 		return errors.New("invalid speed")
@@ -116,6 +114,24 @@ func (c *serverConfig) Check() error {
 	return nil
 }
 
+func (c *serverConfig) Fill() {
+	if len(c.ALPN) == 0 {
+		c.ALPN = DefaultALPN
+	}
+	if c.ReceiveWindowConn == 0 {
+		c.ReceiveWindowConn = DefaultStreamReceiveWindow
+	}
+	if c.ReceiveWindowClient == 0 {
+		c.ReceiveWindowClient = DefaultConnectionReceiveWindow
+	}
+	if c.MaxConnClient == 0 {
+		c.MaxConnClient = DefaultMaxIncomingStreams
+	}
+	if len(c.MMDB) == 0 {
+		c.MMDB = DefaultMMDBFilename
+	}
+}
+
 func (c *serverConfig) String() string {
 	return fmt.Sprintf("%+v", *c)
 }
@@ -128,10 +144,10 @@ type Relay struct {
 
 func (r *Relay) Check() error {
 	if len(r.Listen) == 0 {
-		return errors.New("no relay listen address")
+		return errors.New("missing relay listen address")
 	}
 	if len(r.Remote) == 0 {
-		return errors.New("no relay remote address")
+		return errors.New("missing relay remote address")
 	}
 	if r.Timeout != 0 && r.Timeout < 4 {
 		return errors.New("invalid relay timeout")
@@ -252,10 +268,10 @@ func (c *clientConfig) Check() error {
 		return errors.New("invalid TUN timeout")
 	}
 	if len(c.TCPRelay.Listen) > 0 && len(c.TCPRelay.Remote) == 0 {
-		return errors.New("no TCP relay remote address")
+		return errors.New("missing TCP relay remote address")
 	}
 	if len(c.UDPRelay.Listen) > 0 && len(c.UDPRelay.Remote) == 0 {
-		return errors.New("no UDP relay remote address")
+		return errors.New("missing UDP relay remote address")
 	}
 	if c.TCPRelay.Timeout != 0 && c.TCPRelay.Timeout < 4 {
 		return errors.New("invalid TCP relay timeout")
@@ -283,7 +299,7 @@ func (c *clientConfig) Check() error {
 		return errors.New("invalid TCP Redirect timeout")
 	}
 	if len(c.Server) == 0 {
-		return errors.New("no server address")
+		return errors.New("missing server address")
 	}
 	if up, down, err := c.Speed(); err != nil || up < minSpeedBPS || down < minSpeedBPS {
 		return errors.New("invalid speed")
@@ -293,14 +309,32 @@ func (c *clientConfig) Check() error {
 		return errors.New("invalid receive window size")
 	}
 	if len(c.TCPRelay.Listen) > 0 {
-		logrus.Warn("'relay_tcp' is deprecated, please use 'relay_tcps' instead")
+		logrus.Warn("'relay_tcp' is deprecated, consider using 'relay_tcps' instead")
 	}
 	if len(c.UDPRelay.Listen) > 0 {
-		logrus.Warn("config 'relay_udp' is deprecated, please use 'relay_udps' instead")
+		logrus.Warn("'relay_udp' is deprecated, consider using 'relay_udps' instead")
 	}
 	return nil
 }
 
+func (c *clientConfig) Fill() {
+	if len(c.ALPN) == 0 {
+		c.ALPN = DefaultALPN
+	}
+	if c.ReceiveWindowConn == 0 {
+		c.ReceiveWindowConn = DefaultStreamReceiveWindow
+	}
+	if c.ReceiveWindow == 0 {
+		c.ReceiveWindow = DefaultConnectionReceiveWindow
+	}
+	if len(c.MMDB) == 0 {
+		c.MMDB = DefaultMMDBFilename
+	}
+	if c.IdleTimeout == 0 {
+		c.IdleTimeout = DefaultClientIdleTimeoutSec
+	}
+}
+
 func (c *clientConfig) String() string {
 	return fmt.Sprintf("%+v", *c)
 }

cmd/server.go

@@ -34,6 +34,7 @@ var serverPacketConnFuncFactoryMap = map[string]pktconns.ServerPacketConnFuncFac
 
 func server(config *serverConfig) {
 	logrus.WithField("config", config.String()).Info("Server configuration loaded")
+	config.Fill() // Fill default values
 	// Resolver
 	if len(config.Resolver) > 0 {
 		err := setResolver(config.Resolver)
@@ -55,6 +56,7 @@ func server(config *serverConfig) {
 				"error": err,
 			}).Fatal("Failed to get a certificate with ACME")
 		}
+		tc.NextProtos = []string{config.ALPN}
 		tc.MinVersion = tls.VersionTLS13
 		tlsConfig = tc
 	} else {
@@ -69,14 +71,10 @@ func server(config *serverConfig) {
 		}
 		tlsConfig = &tls.Config{
 			GetCertificate: kpl.GetCertificateFunc(),
+			NextProtos:     []string{config.ALPN},
 			MinVersion:     tls.VersionTLS13,
 		}
 	}
-	if config.ALPN != "" {
-		tlsConfig.NextProtos = []string{config.ALPN}
-	} else {
-		tlsConfig.NextProtos = []string{DefaultALPN}
-	}
 	// QUIC config
 	quicConfig := &quic.Config{
 		InitialStreamReceiveWindow:     config.ReceiveWindowConn,
@@ -84,22 +82,11 @@ func server(config *serverConfig) {
 		InitialConnectionReceiveWindow: config.ReceiveWindowClient,
 		MaxConnectionReceiveWindow:     config.ReceiveWindowClient,
 		MaxIncomingStreams:             int64(config.MaxConnClient),
-		MaxIdleTimeout:                 ServerMaxIdleTimeout,
+		MaxIdleTimeout:                 ServerMaxIdleTimeoutSec * time.Second,
 		KeepAlivePeriod:                0, // Keep alive should solely be client's responsibility
 		DisablePathMTUDiscovery:        config.DisableMTUDiscovery,
 		EnableDatagrams:                true,
 	}
-	if config.ReceiveWindowConn == 0 {
-		quicConfig.InitialStreamReceiveWindow = DefaultStreamReceiveWindow
-		quicConfig.MaxStreamReceiveWindow = DefaultStreamReceiveWindow
-	}
-	if config.ReceiveWindowClient == 0 {
-		quicConfig.InitialConnectionReceiveWindow = DefaultConnectionReceiveWindow
-		quicConfig.MaxConnectionReceiveWindow = DefaultConnectionReceiveWindow
-	}
-	if quicConfig.MaxIncomingStreams == 0 {
-		quicConfig.MaxIncomingStreams = DefaultMaxIncomingStreams
-	}
 	if !quicConfig.DisablePathMTUDiscovery && pmtud.DisablePathMTUDiscovery {
 		logrus.Info("Path MTU Discovery is not yet supported on this platform")
 	}
@@ -109,8 +96,8 @@ func server(config *serverConfig) {
 	switch authMode := config.Auth.Mode; authMode {
 	case "", "none":
 		if len(config.Obfs) == 0 {
-			logrus.Warn("No authentication or obfuscation enabled. " +
-				"Your server could be accessed by anyone! Are you sure this is what you intended?")
+			logrus.Warn("Neither authentication nor obfuscation is turned on. " +
+				"Your server could be used by anyone! Are you sure this is what you want?")
 		}
 		authFunc = func(addr net.Addr, auth []byte, sSend uint64, sRecv uint64) (bool, string) {
 			return true, "Welcome"
@@ -200,11 +187,7 @@ func server(config *serverConfig) {
 			return ipAddr, err
 		},
 			func() (*geoip2.Reader, error) {
-				if len(config.MMDB) > 0 {
-					return loadMMDBReader(config.MMDB)
-				} else {
-					return loadMMDBReader(DefaultMMDBFilename)
-				}
+				return loadMMDBReader(config.MMDB)
 			})
 		if err != nil {
 			logrus.WithFields(logrus.Fields{