mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-29 20:11:28 +00:00
253 lines
7.9 KiB
Go
253 lines
7.9 KiB
Go
package inbound
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import (
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"context"
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"net"
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"strconv"
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"strings"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/experimental/libbox/platform"
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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-tun"
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"github.com/sagernet/sing/common"
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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/common/ranges"
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)
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var (
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_ adapter.Inbound = (*Tun)(nil)
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_ tun.Router = (*Tun)(nil)
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)
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type Tun struct {
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tag string
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ctx context.Context
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router adapter.Router
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logger log.ContextLogger
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inboundOptions option.InboundOptions
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tunOptions tun.Options
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endpointIndependentNat bool
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udpTimeout int64
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stack string
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tunIf tun.Tun
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tunStack tun.Stack
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platformInterface platform.Interface
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platformOptions option.TunPlatformOptions
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}
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func NewTun(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TunInboundOptions, platformInterface platform.Interface) (*Tun, error) {
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tunMTU := options.MTU
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if tunMTU == 0 {
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tunMTU = 9000
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}
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var udpTimeout int64
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if options.UDPTimeout != 0 {
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udpTimeout = options.UDPTimeout
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} else {
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udpTimeout = int64(C.UDPTimeout.Seconds())
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}
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includeUID := uidToRange(options.IncludeUID)
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if len(options.IncludeUIDRange) > 0 {
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var err error
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includeUID, err = parseRange(includeUID, options.IncludeUIDRange)
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if err != nil {
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return nil, E.Cause(err, "parse include_uid_range")
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}
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}
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excludeUID := uidToRange(options.ExcludeUID)
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if len(options.ExcludeUIDRange) > 0 {
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var err error
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excludeUID, err = parseRange(excludeUID, options.ExcludeUIDRange)
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if err != nil {
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return nil, E.Cause(err, "parse exclude_uid_range")
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}
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}
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return &Tun{
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tag: tag,
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ctx: ctx,
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router: router,
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logger: logger,
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inboundOptions: options.InboundOptions,
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tunOptions: tun.Options{
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Name: options.InterfaceName,
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MTU: tunMTU,
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Inet4Address: common.Map(options.Inet4Address, option.ListenPrefix.Build),
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Inet6Address: common.Map(options.Inet6Address, option.ListenPrefix.Build),
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AutoRoute: options.AutoRoute,
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StrictRoute: options.StrictRoute,
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Inet4RouteAddress: common.Map(options.Inet4RouteAddress, option.ListenPrefix.Build),
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Inet6RouteAddress: common.Map(options.Inet6RouteAddress, option.ListenPrefix.Build),
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IncludeUID: includeUID,
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ExcludeUID: excludeUID,
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IncludeAndroidUser: options.IncludeAndroidUser,
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IncludePackage: options.IncludePackage,
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ExcludePackage: options.ExcludePackage,
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InterfaceMonitor: router.InterfaceMonitor(),
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TableIndex: 2022,
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},
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endpointIndependentNat: options.EndpointIndependentNat,
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udpTimeout: udpTimeout,
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stack: options.Stack,
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platformInterface: platformInterface,
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platformOptions: common.PtrValueOrDefault(options.Platform),
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}, nil
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}
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func uidToRange(uidList option.Listable[uint32]) []ranges.Range[uint32] {
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return common.Map(uidList, func(uid uint32) ranges.Range[uint32] {
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return ranges.NewSingle(uid)
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})
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}
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func parseRange(uidRanges []ranges.Range[uint32], rangeList []string) ([]ranges.Range[uint32], error) {
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for _, uidRange := range rangeList {
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if !strings.Contains(uidRange, ":") {
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return nil, E.New("missing ':' in range: ", uidRange)
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}
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subIndex := strings.Index(uidRange, ":")
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if subIndex == 0 {
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return nil, E.New("missing range start: ", uidRange)
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} else if subIndex == len(uidRange)-1 {
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return nil, E.New("missing range end: ", uidRange)
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}
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var start, end uint64
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var err error
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start, err = strconv.ParseUint(uidRange[:subIndex], 10, 32)
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if err != nil {
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return nil, E.Cause(err, "parse range start")
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}
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end, err = strconv.ParseUint(uidRange[subIndex+1:], 10, 32)
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if err != nil {
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return nil, E.Cause(err, "parse range end")
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}
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uidRanges = append(uidRanges, ranges.New(uint32(start), uint32(end)))
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}
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return uidRanges, nil
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}
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func (t *Tun) Type() string {
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return C.TypeTun
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}
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func (t *Tun) Tag() string {
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return t.tag
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}
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func (t *Tun) Start() error {
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if C.IsAndroid && t.platformInterface == nil {
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t.logger.Trace("building android rules")
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t.tunOptions.BuildAndroidRules(t.router.PackageManager(), t)
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}
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if t.tunOptions.Name == "" {
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t.tunOptions.Name = tun.CalculateInterfaceName("")
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}
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var (
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tunInterface tun.Tun
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err error
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)
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t.logger.Trace("opening interface")
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if t.platformInterface != nil {
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tunInterface, err = t.platformInterface.OpenTun(t.tunOptions, t.platformOptions)
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} else {
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tunInterface, err = tun.New(t.tunOptions)
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}
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if err != nil {
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return E.Cause(err, "configure tun interface")
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}
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t.logger.Trace("creating stack")
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t.tunIf = tunInterface
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var tunRouter tun.Router
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if len(t.router.IPRules()) > 0 {
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tunRouter = t
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}
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t.tunStack, err = tun.NewStack(t.stack, tun.StackOptions{
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Context: t.ctx,
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Tun: tunInterface,
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MTU: t.tunOptions.MTU,
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Name: t.tunOptions.Name,
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Inet4Address: t.tunOptions.Inet4Address,
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Inet6Address: t.tunOptions.Inet6Address,
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EndpointIndependentNat: t.endpointIndependentNat,
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UDPTimeout: t.udpTimeout,
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Router: tunRouter,
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Handler: t,
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Logger: t.logger,
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UnderPlatform: t.platformInterface != nil,
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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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t.logger.Trace("starting stack")
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err = t.tunStack.Start()
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if err != nil {
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return err
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}
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t.logger.Info("started at ", t.tunOptions.Name)
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return nil
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}
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func (t *Tun) Close() error {
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return common.Close(
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t.tunStack,
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t.tunIf,
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)
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}
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func (t *Tun) RouteConnection(session tun.RouteSession, conn tun.RouteContext) tun.RouteAction {
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ctx := log.ContextWithNewID(t.ctx)
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var metadata adapter.InboundContext
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metadata.Inbound = t.tag
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metadata.InboundType = C.TypeTun
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metadata.IPVersion = session.IPVersion
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metadata.Network = tun.NetworkName(session.Network)
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metadata.Source = M.SocksaddrFromNetIP(session.Source)
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metadata.Destination = M.SocksaddrFromNetIP(session.Destination)
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metadata.InboundOptions = t.inboundOptions
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t.logger.DebugContext(ctx, "incoming connection from ", metadata.Source)
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t.logger.DebugContext(ctx, "incoming connection to ", metadata.Destination)
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return t.router.RouteIPConnection(ctx, conn, metadata)
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}
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func (t *Tun) NewConnection(ctx context.Context, conn net.Conn, upstreamMetadata M.Metadata) error {
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ctx = log.ContextWithNewID(ctx)
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var metadata adapter.InboundContext
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metadata.Inbound = t.tag
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metadata.InboundType = C.TypeTun
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metadata.Source = upstreamMetadata.Source
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metadata.Destination = upstreamMetadata.Destination
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metadata.InboundOptions = t.inboundOptions
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t.logger.InfoContext(ctx, "inbound connection from ", metadata.Source)
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t.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
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err := t.router.RouteConnection(ctx, conn, metadata)
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if err != nil {
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t.NewError(ctx, err)
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}
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return nil
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}
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func (t *Tun) NewPacketConnection(ctx context.Context, conn N.PacketConn, upstreamMetadata M.Metadata) error {
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ctx = log.ContextWithNewID(ctx)
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var metadata adapter.InboundContext
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metadata.Inbound = t.tag
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metadata.InboundType = C.TypeTun
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metadata.Source = upstreamMetadata.Source
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metadata.Destination = upstreamMetadata.Destination
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metadata.InboundOptions = t.inboundOptions
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t.logger.InfoContext(ctx, "inbound packet connection from ", metadata.Source)
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t.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
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err := t.router.RoutePacketConnection(ctx, conn, metadata)
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if err != nil {
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t.NewError(ctx, err)
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}
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return nil
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}
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func (t *Tun) NewError(ctx context.Context, err error) {
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NewError(t.logger, ctx, err)
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}
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