android: Add build info tools for debug

experimental/libbox/build_info.go

@@ -0,0 +1,234 @@
+//go:build android
+
+package libbox
+
+import (
+	"archive/zip"
+	"bytes"
+	"debug/buildinfo"
+	"io"
+	"runtime/debug"
+	"strings"
+
+	"github.com/sagernet/sing/common"
+)
+
+const (
+	androidVPNCoreTypeOpenVPN     = "OpenVPN"
+	androidVPNCoreTypeShadowsocks = "Shadowsocks"
+	androidVPNCoreTypeClash       = "Clash"
+	androidVPNCoreTypeV2Ray       = "V2Ray"
+	androidVPNCoreTypeWireGuard   = "WireGuard"
+	androidVPNCoreTypeSingBox     = "sing-box"
+	androidVPNCoreTypeUnknown     = "Unknown"
+)
+
+type AndroidVPNType struct {
+	CoreType  string
+	CorePath  string
+	GoVersion string
+}
+
+func ReadAndroidVPNType(publicSourceDirList StringIterator) (*AndroidVPNType, error) {
+	apkPathList := iteratorToArray[string](publicSourceDirList)
+	var lastError error
+	for _, apkPath := range apkPathList {
+		androidVPNType, err := readAndroidVPNType(apkPath)
+		if androidVPNType == nil {
+			if err != nil {
+				lastError = err
+			}
+			continue
+		}
+		return androidVPNType, nil
+	}
+	return nil, lastError
+}
+
+func readAndroidVPNType(publicSourceDir string) (*AndroidVPNType, error) {
+	reader, err := zip.OpenReader(publicSourceDir)
+	if err != nil {
+		return nil, err
+	}
+	defer reader.Close()
+	var lastError error
+	for _, file := range reader.File {
+		if !strings.HasPrefix(file.Name, "lib/") {
+			continue
+		}
+		vpnType, err := readAndroidVPNTypeEntry(file)
+		if err != nil {
+			lastError = err
+			continue
+		}
+		return vpnType, nil
+	}
+	for _, file := range reader.File {
+		if !strings.HasPrefix(file.Name, "lib/") {
+			continue
+		}
+		if strings.Contains(file.Name, androidVPNCoreTypeOpenVPN) || strings.Contains(file.Name, "ovpn") {
+			return &AndroidVPNType{CoreType: androidVPNCoreTypeOpenVPN}, nil
+		}
+		if strings.Contains(file.Name, androidVPNCoreTypeShadowsocks) {
+			return &AndroidVPNType{CoreType: androidVPNCoreTypeShadowsocks}, nil
+		}
+	}
+	return nil, lastError
+}
+
+func readAndroidVPNTypeEntry(zipFile *zip.File) (*AndroidVPNType, error) {
+	readCloser, err := zipFile.Open()
+	if err != nil {
+		return nil, err
+	}
+	libContent := make([]byte, zipFile.UncompressedSize64)
+	_, err = io.ReadFull(readCloser, libContent)
+	readCloser.Close()
+	if err != nil {
+		return nil, err
+	}
+	buildInfo, err := buildinfo.Read(bytes.NewReader(libContent))
+	if err != nil {
+		return nil, err
+	}
+	var vpnType AndroidVPNType
+	vpnType.GoVersion = buildInfo.GoVersion
+	if !strings.HasPrefix(vpnType.GoVersion, "go") {
+		vpnType.GoVersion = "obfuscated"
+	} else {
+		vpnType.GoVersion = vpnType.GoVersion[2:]
+	}
+	vpnType.CoreType = androidVPNCoreTypeUnknown
+	if len(buildInfo.Deps) == 0 {
+		vpnType.CoreType = "obfuscated"
+		return &vpnType, nil
+	}
+
+	dependencies := make(map[string]bool)
+	dependencies[buildInfo.Path] = true
+	for _, module := range buildInfo.Deps {
+		dependencies[module.Path] = true
+		if module.Replace != nil {
+			dependencies[module.Replace.Path] = true
+		}
+	}
+	for dependency := range dependencies {
+		pkgType, loaded := determinePkgType(dependency)
+		if loaded {
+			vpnType.CoreType = pkgType
+		}
+	}
+	if vpnType.CoreType == androidVPNCoreTypeUnknown {
+		for dependency := range dependencies {
+			pkgType, loaded := determinePkgTypeSecondary(dependency)
+			if loaded {
+				vpnType.CoreType = pkgType
+				return &vpnType, nil
+			}
+		}
+	}
+	if vpnType.CoreType != androidVPNCoreTypeUnknown {
+		vpnType.CorePath, _ = determineCorePath(buildInfo, vpnType.CoreType)
+		return &vpnType, nil
+	}
+	if dependencies["github.com/golang/protobuf"] && dependencies["github.com/v2fly/ss-bloomring"] {
+		vpnType.CoreType = androidVPNCoreTypeV2Ray
+		return &vpnType, nil
+	}
+	return &vpnType, nil
+}
+
+func determinePkgType(pkgName string) (string, bool) {
+	pkgNameLower := strings.ToLower(pkgName)
+	if strings.Contains(pkgNameLower, "clash") {
+		return androidVPNCoreTypeClash, true
+	}
+	if strings.Contains(pkgNameLower, "v2ray") || strings.Contains(pkgNameLower, "xray") {
+		return androidVPNCoreTypeV2Ray, true
+	}
+
+	if strings.Contains(pkgNameLower, "sing-box") {
+		return androidVPNCoreTypeSingBox, true
+	}
+	return "", false
+}
+
+func determinePkgTypeSecondary(pkgName string) (string, bool) {
+	pkgNameLower := strings.ToLower(pkgName)
+	if strings.Contains(pkgNameLower, "wireguard") {
+		return androidVPNCoreTypeWireGuard, true
+	}
+	return "", false
+}
+
+func determineCorePath(pkgInfo *buildinfo.BuildInfo, pkgType string) (string, bool) {
+	switch pkgType {
+	case androidVPNCoreTypeClash:
+		return determineCorePathForPkgs(pkgInfo, []string{"github.com/Dreamacro/clash"}, []string{"clash"})
+	case androidVPNCoreTypeV2Ray:
+		if v2rayVersion, loaded := determineCorePathForPkgs(pkgInfo, []string{
+			"github.com/v2fly/v2ray-core",
+			"github.com/v2fly/v2ray-core/v4",
+			"github.com/v2fly/v2ray-core/v5",
+		}, []string{
+			"v2ray",
+		}); loaded {
+			return v2rayVersion, true
+		}
+		if xrayVersion, loaded := determineCorePathForPkgs(pkgInfo, []string{
+			"github.com/xtls/xray-core",
+		}, []string{
+			"xray",
+		}); loaded {
+			return xrayVersion, true
+		}
+		return "", false
+	case androidVPNCoreTypeSingBox:
+		return determineCorePathForPkgs(pkgInfo, []string{"github.com/sagernet/sing-box"}, []string{"sing-box"})
+	case androidVPNCoreTypeWireGuard:
+		return determineCorePathForPkgs(pkgInfo, []string{"golang.zx2c4.com/wireguard"}, []string{"wireguard"})
+	default:
+		return "", false
+	}
+}
+
+func determineCorePathForPkgs(pkgInfo *buildinfo.BuildInfo, pkgs []string, names []string) (string, bool) {
+	for _, pkg := range pkgs {
+		if pkgInfo.Path == pkg {
+			return pkg, true
+		}
+		strictDependency := common.Find(pkgInfo.Deps, func(module *debug.Module) bool {
+			return module.Path == pkg
+		})
+		if strictDependency != nil {
+			if isValidVersion(strictDependency.Version) {
+				return strictDependency.Path + " " + strictDependency.Version, true
+			} else {
+				return strictDependency.Path, true
+			}
+		}
+	}
+	for _, name := range names {
+		if strings.Contains(pkgInfo.Path, name) {
+			return pkgInfo.Path, true
+		}
+		looseDependency := common.Find(pkgInfo.Deps, func(module *debug.Module) bool {
+			return strings.Contains(module.Path, name) || (module.Replace != nil && strings.Contains(module.Replace.Path, name))
+		})
+		if looseDependency != nil {
+			return looseDependency.Path, true
+		}
+	}
+	return "", false
+}
+
+func isValidVersion(version string) bool {
+	if version == "(devel)" {
+		return false
+	}
+	if strings.Contains(version, "v0.0.0") {
+		return false
+	}
+	return true
+}