世界
100 lines
2.1 KiB
Go
100 lines
2.1 KiB
Go
//go:build linux || darwin
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package bridge
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import (
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"net/netip"
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"os"
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"sync"
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"github.com/sagernet/sing-tun"
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E "github.com/sagernet/sing/common/exceptions"
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"github.com/sagernet/sing/common/logger"
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"github.com/sagernet/sing/common/x/list"
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)
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type serviceBase struct {
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logger logger.ContextLogger
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mtu int
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inet4Port netip.Addr
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inet6Port netip.Addr
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tunName string
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tunFileDescriptor int
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forwardingRestore []sysctlState
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networkMonitor tun.NetworkUpdateMonitor
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monitorElement *list.Element[tun.NetworkUpdateCallback]
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access sync.Mutex
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egressName string
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closed bool
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applyEgress func()
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}
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func (s *serviceBase) FileDescriptor() int {
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return s.tunFileDescriptor
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}
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func (s *serviceBase) Name() string {
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return s.tunName
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}
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func (s *serviceBase) Inet6Active() bool {
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return s.inet6Port.IsValid()
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}
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func (s *serviceBase) SetEgress(interfaceName string) error {
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s.access.Lock()
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defer s.access.Unlock()
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if s.closed {
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return os.ErrClosed
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}
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s.egressName = interfaceName
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s.applyEgress()
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return nil
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}
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func (s *serviceBase) syncEgress() {
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s.access.Lock()
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defer s.access.Unlock()
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if s.closed {
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return
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}
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s.applyEgress()
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}
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func (s *serviceBase) startNetworkMonitor() {
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networkMonitor, err := tun.NewNetworkUpdateMonitor(s.logger)
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if err != nil {
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s.logger.Debug(E.Cause(err, "create network monitor, egress will not track route changes"))
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return
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}
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s.monitorElement = networkMonitor.RegisterCallback(func() { s.syncEgress() })
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s.networkMonitor = networkMonitor
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err = networkMonitor.Start()
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if err != nil {
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s.logger.Debug(E.Cause(err, "start network monitor, egress will not track route changes"))
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}
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}
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func (s *serviceBase) beginClose() bool {
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s.access.Lock()
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if s.closed {
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s.access.Unlock()
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return false
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}
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s.closed = true
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networkMonitor := s.networkMonitor
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monitorElement := s.monitorElement
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s.networkMonitor = nil
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s.monitorElement = nil
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s.access.Unlock()
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if networkMonitor != nil {
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if monitorElement != nil {
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networkMonitor.UnregisterCallback(monitorElement)
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}
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_ = networkMonitor.Close()
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}
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return true
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}
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