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Add L3 routing support

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This commit is contained in:
世界
2023-03-21 21:36:17 +08:00
parent 9b762e3c2e
commit afcc8b204f
61 changed files with 2043 additions and 965 deletions
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38
inbound/tun.go
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@@ -19,7 +19,10 @@ import (
"github.com/sagernet/sing/common/ranges"
)
var _ adapter.Inbound = (*Tun)(nil)
var (
_ adapter.Inbound = (*Tun)(nil)
_ tun.Router = (*Tun)(nil)
)
type Tun struct {
tag string
@@ -38,10 +41,6 @@ type Tun struct {
}
func NewTun(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TunInboundOptions, platformInterface platform.Interface) (*Tun, error) {
tunName := options.InterfaceName
if tunName == "" {
tunName = tun.CalculateInterfaceName("")
}
tunMTU := options.MTU
if tunMTU == 0 {
tunMTU = 9000
@@ -75,7 +74,7 @@ func NewTun(ctx context.Context, router adapter.Router, logger log.ContextLogger
logger: logger,
inboundOptions: options.InboundOptions,
tunOptions: tun.Options{
Name: tunName,
Name: options.InterfaceName,
MTU: tunMTU,
Inet4Address: common.Map(options.Inet4Address, option.ListenPrefix.Build),
Inet6Address: common.Map(options.Inet6Address, option.ListenPrefix.Build),
@@ -141,12 +140,17 @@ func (t *Tun) Tag() string {
func (t *Tun) Start() error {
if C.IsAndroid && t.platformInterface == nil {
t.logger.Trace("building android rules")
t.tunOptions.BuildAndroidRules(t.router.PackageManager(), t)
}
if t.tunOptions.Name == "" {
t.tunOptions.Name = tun.CalculateInterfaceName("")
}
var (
tunInterface tun.Tun
err error
)
t.logger.Trace("opening interface")
if t.platformInterface != nil {
tunInterface, err = t.platformInterface.OpenTun(t.tunOptions, t.platformOptions)
} else {
@@ -155,7 +159,12 @@ func (t *Tun) Start() error {
if err != nil {
return E.Cause(err, "configure tun interface")
}
t.logger.Trace("creating stack")
t.tunIf = tunInterface
var tunRouter tun.Router
if len(t.router.IPRules()) > 0 {
tunRouter = t
}
t.tunStack, err = tun.NewStack(t.stack, tun.StackOptions{
Context: t.ctx,
Tun: tunInterface,
@@ -165,6 +174,7 @@ func (t *Tun) Start() error {
Inet6Address: t.tunOptions.Inet6Address,
EndpointIndependentNat: t.endpointIndependentNat,
UDPTimeout: t.udpTimeout,
Router: tunRouter,
Handler: t,
Logger: t.logger,
UnderPlatform: t.platformInterface != nil,
@@ -172,6 +182,7 @@ func (t *Tun) Start() error {
if err != nil {
return err
}
t.logger.Trace("starting stack")
err = t.tunStack.Start()
if err != nil {
return err
@@ -187,6 +198,21 @@ func (t *Tun) Close() error {
)
}
func (t *Tun) RouteConnection(session tun.RouteSession, conn tun.RouteContext) tun.RouteAction {
ctx := log.ContextWithNewID(t.ctx)
var metadata adapter.InboundContext
metadata.Inbound = t.tag
metadata.InboundType = C.TypeTun
metadata.IPVersion = session.IPVersion
metadata.Network = tun.NetworkName(session.Network)
metadata.Source = M.SocksaddrFromNetIP(session.Source)
metadata.Destination = M.SocksaddrFromNetIP(session.Destination)
metadata.InboundOptions = t.inboundOptions
t.logger.DebugContext(ctx, "incoming connection from ", metadata.Source)
t.logger.DebugContext(ctx, "incoming connection to ", metadata.Destination)
return t.router.RouteIPConnection(ctx, conn, metadata)
}
func (t *Tun) NewConnection(ctx context.Context, conn net.Conn, upstreamMetadata M.Metadata) error {
ctx = log.ContextWithNewID(ctx)
var metadata adapter.InboundContext