mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-23 09:01:30 +00:00
430 lines
11 KiB
Go
430 lines
11 KiB
Go
package outbound
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import (
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"context"
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"net"
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"sync"
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"time"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/interrupt"
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"github.com/sagernet/sing-box/common/urltest"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/atomic"
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"github.com/sagernet/sing/common/batch"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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"github.com/sagernet/sing/service"
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"github.com/sagernet/sing/service/pause"
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)
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var (
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_ adapter.Outbound = (*URLTest)(nil)
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_ adapter.OutboundGroup = (*URLTest)(nil)
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_ adapter.InterfaceUpdateListener = (*URLTest)(nil)
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)
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type URLTest struct {
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myOutboundAdapter
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ctx context.Context
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tags []string
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link string
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interval time.Duration
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tolerance uint16
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idleTimeout time.Duration
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group *URLTestGroup
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interruptExternalConnections bool
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}
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func NewURLTest(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.URLTestOutboundOptions) (*URLTest, error) {
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outbound := &URLTest{
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myOutboundAdapter: myOutboundAdapter{
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protocol: C.TypeURLTest,
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network: []string{N.NetworkTCP, N.NetworkUDP},
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router: router,
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logger: logger,
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tag: tag,
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dependencies: options.Outbounds,
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},
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ctx: ctx,
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tags: options.Outbounds,
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link: options.URL,
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interval: time.Duration(options.Interval),
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tolerance: options.Tolerance,
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idleTimeout: time.Duration(options.IdleTimeout),
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interruptExternalConnections: options.InterruptExistConnections,
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}
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if len(outbound.tags) == 0 {
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return nil, E.New("missing tags")
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}
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return outbound, nil
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}
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func (s *URLTest) Start() error {
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outbounds := make([]adapter.Outbound, 0, len(s.tags))
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for i, tag := range s.tags {
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detour, loaded := s.router.Outbound(tag)
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if !loaded {
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return E.New("outbound ", i, " not found: ", tag)
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}
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outbounds = append(outbounds, detour)
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}
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group, err := NewURLTestGroup(
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s.ctx,
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s.router,
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s.logger,
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outbounds,
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s.link,
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s.interval,
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s.tolerance,
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s.idleTimeout,
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s.interruptExternalConnections,
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)
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if err != nil {
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return err
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}
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s.group = group
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return nil
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}
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func (s *URLTest) PostStart() error {
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s.group.PostStart()
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return nil
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}
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func (s *URLTest) Close() error {
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return common.Close(
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common.PtrOrNil(s.group),
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)
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}
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func (s *URLTest) Now() string {
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if s.group.selectedOutboundTCP != nil {
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return s.group.selectedOutboundTCP.Tag()
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} else if s.group.selectedOutboundUDP != nil {
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return s.group.selectedOutboundUDP.Tag()
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}
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return ""
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}
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func (s *URLTest) All() []string {
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return s.tags
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}
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func (s *URLTest) URLTest(ctx context.Context) (map[string]uint16, error) {
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return s.group.URLTest(ctx)
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}
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func (s *URLTest) CheckOutbounds() {
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s.group.CheckOutbounds(true)
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}
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func (s *URLTest) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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s.group.Touch()
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var outbound adapter.Outbound
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switch N.NetworkName(network) {
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case N.NetworkTCP:
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outbound = s.group.selectedOutboundTCP
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case N.NetworkUDP:
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outbound = s.group.selectedOutboundUDP
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default:
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return nil, E.Extend(N.ErrUnknownNetwork, network)
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}
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if outbound == nil {
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outbound, _ = s.group.Select(network)
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}
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if outbound == nil {
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return nil, E.New("missing supported outbound")
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}
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conn, err := outbound.DialContext(ctx, network, destination)
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if err == nil {
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return s.group.interruptGroup.NewConn(conn, interrupt.IsExternalConnectionFromContext(ctx)), nil
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}
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s.logger.ErrorContext(ctx, err)
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s.group.history.DeleteURLTestHistory(outbound.Tag())
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return nil, err
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}
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func (s *URLTest) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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s.group.Touch()
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outbound := s.group.selectedOutboundUDP
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if outbound == nil {
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outbound, _ = s.group.Select(N.NetworkUDP)
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}
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if outbound == nil {
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return nil, E.New("missing supported outbound")
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}
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conn, err := outbound.ListenPacket(ctx, destination)
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if err == nil {
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return s.group.interruptGroup.NewPacketConn(conn, interrupt.IsExternalConnectionFromContext(ctx)), nil
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}
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s.logger.ErrorContext(ctx, err)
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s.group.history.DeleteURLTestHistory(outbound.Tag())
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return nil, err
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}
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// TODO
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// Deprecated
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func (s *URLTest) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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ctx = interrupt.ContextWithIsExternalConnection(ctx)
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return NewConnection(ctx, s, conn, metadata)
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}
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// TODO
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// Deprecated
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func (s *URLTest) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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ctx = interrupt.ContextWithIsExternalConnection(ctx)
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return NewPacketConnection(ctx, s, conn, metadata)
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}
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func (s *URLTest) InterfaceUpdated() {
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go s.group.CheckOutbounds(true)
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return
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}
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type URLTestGroup struct {
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ctx context.Context
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router adapter.Router
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logger log.Logger
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outbounds []adapter.Outbound
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link string
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interval time.Duration
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tolerance uint16
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idleTimeout time.Duration
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history *urltest.HistoryStorage
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checking atomic.Bool
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pauseManager pause.Manager
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selectedOutboundTCP adapter.Outbound
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selectedOutboundUDP adapter.Outbound
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interruptGroup *interrupt.Group
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interruptExternalConnections bool
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access sync.Mutex
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ticker *time.Ticker
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close chan struct{}
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started bool
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lastActive atomic.TypedValue[time.Time]
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}
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func NewURLTestGroup(
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ctx context.Context,
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router adapter.Router,
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logger log.Logger,
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outbounds []adapter.Outbound,
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link string,
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interval time.Duration,
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tolerance uint16,
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idleTimeout time.Duration,
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interruptExternalConnections bool,
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) (*URLTestGroup, error) {
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if interval == 0 {
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interval = C.DefaultURLTestInterval
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}
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if tolerance == 0 {
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tolerance = 50
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}
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if idleTimeout == 0 {
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idleTimeout = C.DefaultURLTestIdleTimeout
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}
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if interval > idleTimeout {
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return nil, E.New("interval must be less or equal than idle_timeout")
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}
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var history *urltest.HistoryStorage
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if history = service.PtrFromContext[urltest.HistoryStorage](ctx); history != nil {
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} else if clashServer := router.ClashServer(); clashServer != nil {
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history = clashServer.HistoryStorage()
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} else {
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history = urltest.NewHistoryStorage()
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}
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return &URLTestGroup{
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ctx: ctx,
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router: router,
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logger: logger,
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outbounds: outbounds,
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link: link,
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interval: interval,
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tolerance: tolerance,
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idleTimeout: idleTimeout,
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history: history,
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close: make(chan struct{}),
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pauseManager: service.FromContext[pause.Manager](ctx),
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interruptGroup: interrupt.NewGroup(),
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interruptExternalConnections: interruptExternalConnections,
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}, nil
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}
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func (g *URLTestGroup) PostStart() {
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g.started = true
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g.lastActive.Store(time.Now())
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go g.CheckOutbounds(false)
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}
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func (g *URLTestGroup) Touch() {
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if !g.started {
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return
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}
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if g.ticker != nil {
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g.lastActive.Store(time.Now())
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return
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}
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g.access.Lock()
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defer g.access.Unlock()
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if g.ticker != nil {
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return
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}
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g.ticker = time.NewTicker(g.interval)
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go g.loopCheck()
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}
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func (g *URLTestGroup) Close() error {
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if g.ticker == nil {
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return nil
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}
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g.ticker.Stop()
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close(g.close)
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return nil
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}
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func (g *URLTestGroup) Select(network string) (adapter.Outbound, bool) {
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var minDelay uint16
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var minOutbound adapter.Outbound
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switch network {
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case N.NetworkTCP:
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if g.selectedOutboundTCP != nil {
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if history := g.history.LoadURLTestHistory(RealTag(g.selectedOutboundTCP)); history != nil {
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minOutbound = g.selectedOutboundTCP
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minDelay = history.Delay
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}
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}
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case N.NetworkUDP:
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if g.selectedOutboundUDP != nil {
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if history := g.history.LoadURLTestHistory(RealTag(g.selectedOutboundUDP)); history != nil {
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minOutbound = g.selectedOutboundUDP
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minDelay = history.Delay
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}
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}
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}
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for _, detour := range g.outbounds {
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if !common.Contains(detour.Network(), network) {
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continue
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}
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history := g.history.LoadURLTestHistory(RealTag(detour))
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if history == nil {
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continue
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}
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if minDelay == 0 || minDelay > history.Delay+g.tolerance {
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minDelay = history.Delay
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minOutbound = detour
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}
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}
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if minOutbound == nil {
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for _, detour := range g.outbounds {
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if !common.Contains(detour.Network(), network) {
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continue
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}
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return detour, false
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}
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return nil, false
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}
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return minOutbound, true
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}
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func (g *URLTestGroup) loopCheck() {
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if time.Now().Sub(g.lastActive.Load()) > g.interval {
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g.lastActive.Store(time.Now())
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g.CheckOutbounds(false)
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}
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for {
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select {
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case <-g.close:
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return
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case <-g.ticker.C:
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}
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if time.Now().Sub(g.lastActive.Load()) > g.idleTimeout {
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g.access.Lock()
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g.ticker.Stop()
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g.ticker = nil
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g.access.Unlock()
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return
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}
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g.pauseManager.WaitActive()
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g.CheckOutbounds(false)
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}
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}
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func (g *URLTestGroup) CheckOutbounds(force bool) {
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_, _ = g.urlTest(g.ctx, force)
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}
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func (g *URLTestGroup) URLTest(ctx context.Context) (map[string]uint16, error) {
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return g.urlTest(ctx, false)
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}
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func (g *URLTestGroup) urlTest(ctx context.Context, force bool) (map[string]uint16, error) {
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result := make(map[string]uint16)
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if g.checking.Swap(true) {
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return result, nil
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}
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defer g.checking.Store(false)
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b, _ := batch.New(ctx, batch.WithConcurrencyNum[any](10))
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checked := make(map[string]bool)
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var resultAccess sync.Mutex
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for _, detour := range g.outbounds {
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tag := detour.Tag()
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realTag := RealTag(detour)
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if checked[realTag] {
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continue
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}
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history := g.history.LoadURLTestHistory(realTag)
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if !force && history != nil && time.Now().Sub(history.Time) < g.interval {
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continue
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}
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checked[realTag] = true
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p, loaded := g.router.Outbound(realTag)
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if !loaded {
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continue
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}
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b.Go(realTag, func() (any, error) {
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testCtx, cancel := context.WithTimeout(g.ctx, C.TCPTimeout)
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defer cancel()
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t, err := urltest.URLTest(testCtx, g.link, p)
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if err != nil {
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g.logger.Debug("outbound ", tag, " unavailable: ", err)
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g.history.DeleteURLTestHistory(realTag)
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} else {
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g.logger.Debug("outbound ", tag, " available: ", t, "ms")
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g.history.StoreURLTestHistory(realTag, &urltest.History{
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Time: time.Now(),
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Delay: t,
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})
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resultAccess.Lock()
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result[tag] = t
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resultAccess.Unlock()
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}
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return nil, nil
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})
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}
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b.Wait()
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g.performUpdateCheck()
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return result, nil
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}
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func (g *URLTestGroup) performUpdateCheck() {
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var updated bool
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if outbound, exists := g.Select(N.NetworkTCP); outbound != nil && (g.selectedOutboundTCP == nil || (exists && outbound != g.selectedOutboundTCP)) {
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g.selectedOutboundTCP = outbound
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updated = true
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}
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if outbound, exists := g.Select(N.NetworkUDP); outbound != nil && (g.selectedOutboundUDP == nil || (exists && outbound != g.selectedOutboundUDP)) {
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g.selectedOutboundUDP = outbound
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updated = true
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}
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if updated {
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g.interruptGroup.Interrupt(g.interruptExternalConnections)
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}
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}
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