Refactor struct & Add override dialer options
This commit is contained in:
世界
305
inbound/default.go
Normal file
305
inbound/default.go
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@@ -0,0 +1,305 @@
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package inbound
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import (
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"context"
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"net"
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"net/netip"
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"os"
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"sync"
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"time"
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"github.com/database64128/tfo-go"
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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/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/buf"
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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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)
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var _ adapter.Inbound = (*myInboundAdapter)(nil)
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type myInboundAdapter struct {
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protocol string
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network []string
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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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tag string
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listenOptions option.ListenOptions
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connHandler adapter.ConnectionHandler
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packetHandler adapter.PacketHandler
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packetUpstream any
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// internal
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tcpListener *net.TCPListener
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udpConn *net.UDPConn
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packetForce6 bool
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packetAccess sync.RWMutex
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packetOutboundClosed chan struct{}
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packetOutbound chan *myInboundPacket
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}
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func (a *myInboundAdapter) Type() string {
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return a.protocol
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}
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func (a *myInboundAdapter) Tag() string {
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return a.tag
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}
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func (a *myInboundAdapter) Start() error {
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bindAddr := M.SocksaddrFromAddrPort(netip.Addr(a.listenOptions.Listen), a.listenOptions.Port)
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var listenAddr net.Addr
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if common.Contains(a.network, C.NetworkTCP) {
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var tcpListener *net.TCPListener
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var err error
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if !a.listenOptions.TCPFastOpen {
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tcpListener, err = net.ListenTCP(M.NetworkFromNetAddr(C.NetworkTCP, bindAddr.Addr), bindAddr.TCPAddr())
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} else {
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tcpListener, err = tfo.ListenTCP(M.NetworkFromNetAddr(C.NetworkTCP, bindAddr.Addr), bindAddr.TCPAddr())
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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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a.tcpListener = tcpListener
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go a.loopTCPIn()
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listenAddr = tcpListener.Addr()
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}
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if common.Contains(a.network, C.NetworkUDP) {
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udpConn, err := net.ListenUDP(M.NetworkFromNetAddr(C.NetworkUDP, bindAddr.Addr), bindAddr.UDPAddr())
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if err != nil {
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return err
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}
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a.udpConn = udpConn
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a.packetForce6 = M.SocksaddrFromNet(udpConn.LocalAddr()).Addr.Is6()
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a.packetOutboundClosed = make(chan struct{})
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a.packetOutbound = make(chan *myInboundPacket)
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if _, threadUnsafeHandler := common.Cast[N.ThreadUnsafeWriter](a.packetUpstream); !threadUnsafeHandler {
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go a.loopUDPIn()
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} else {
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go a.loopUDPInThreadSafe()
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}
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go a.loopUDPOut()
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if listenAddr == nil {
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listenAddr = udpConn.LocalAddr()
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}
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}
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a.logger.Info("server started at ", listenAddr)
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return nil
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}
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func (a *myInboundAdapter) Close() error {
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return common.Close(
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common.PtrOrNil(a.tcpListener),
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common.PtrOrNil(a.udpConn),
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)
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}
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func (a *myInboundAdapter) upstreamHandler(metadata adapter.InboundContext) adapter.UpstreamHandlerAdapter {
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return adapter.NewUpstreamHandler(metadata, a.newConnection, a.streamPacketConnection, a)
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}
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func (a *myInboundAdapter) upstreamContextHandler() adapter.UpstreamHandlerAdapter {
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return adapter.NewUpstreamContextHandler(a.newConnection, a.newPacketConnection, a)
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}
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func (a *myInboundAdapter) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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a.logger.WithContext(ctx).Info("inbound connection to ", metadata.Destination)
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return a.router.RouteConnection(ctx, conn, metadata)
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}
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func (a *myInboundAdapter) streamPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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a.logger.WithContext(ctx).Info("inbound packet connection to ", metadata.Destination)
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return a.router.RoutePacketConnection(ctx, conn, metadata)
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}
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func (a *myInboundAdapter) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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ctx = log.ContextWithID(ctx)
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a.logger.WithContext(ctx).Info("inbound packet connection from ", metadata.Source)
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a.logger.WithContext(ctx).Info("inbound packet connection to ", metadata.Destination)
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return a.router.RoutePacketConnection(ctx, conn, metadata)
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}
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func (a *myInboundAdapter) loopTCPIn() {
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tcpListener := a.tcpListener
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for {
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conn, err := tcpListener.Accept()
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if err != nil {
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return
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}
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go func() {
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ctx := log.ContextWithID(a.ctx)
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var metadata adapter.InboundContext
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metadata.Inbound = a.tag
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metadata.Network = C.NetworkTCP
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metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr())
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a.logger.WithContext(ctx).Info("inbound connection from ", metadata.Source)
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hErr := a.connHandler.NewConnection(ctx, conn, metadata)
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if hErr != nil {
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a.NewError(ctx, E.Cause(hErr, "process connection from ", metadata.Source))
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}
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}()
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}
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}
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func (a *myInboundAdapter) loopUDPIn() {
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defer close(a.packetOutboundClosed)
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_buffer := buf.StackNewPacket()
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defer common.KeepAlive(_buffer)
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buffer := common.Dup(_buffer)
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defer buffer.Release()
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buffer.IncRef()
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defer buffer.DecRef()
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packetService := (*myInboundPacketAdapter)(a)
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for {
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buffer.Reset()
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n, addr, err := a.udpConn.ReadFromUDPAddrPort(buffer.FreeBytes())
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if err != nil {
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return
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}
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buffer.Truncate(n)
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var metadata adapter.InboundContext
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metadata.Inbound = a.tag
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metadata.Network = C.NetworkUDP
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metadata.Source = M.SocksaddrFromNetIP(addr)
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err = a.packetHandler.NewPacket(a.ctx, packetService, buffer, metadata)
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if err != nil {
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a.newError(E.Cause(err, "process packet from ", metadata.Source))
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}
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}
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}
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func (a *myInboundAdapter) loopUDPInThreadSafe() {
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defer close(a.packetOutboundClosed)
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packetService := (*myInboundPacketAdapter)(a)
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for {
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buffer := buf.NewPacket()
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n, addr, err := a.udpConn.ReadFromUDPAddrPort(buffer.FreeBytes())
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if err != nil {
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buffer.Release()
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return
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}
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buffer.Truncate(n)
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var metadata adapter.InboundContext
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metadata.Inbound = a.tag
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metadata.Network = C.NetworkUDP
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metadata.Source = M.SocksaddrFromNetIP(addr)
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err = a.packetHandler.NewPacket(a.ctx, packetService, buffer, metadata)
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if err != nil {
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buffer.Release()
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a.newError(E.Cause(err, "process packet from ", metadata.Source))
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}
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}
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}
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func (a *myInboundAdapter) loopUDPOut() {
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for {
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select {
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case packet := <-a.packetOutbound:
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err := a.writePacket(packet.buffer, packet.destination)
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if err != nil && !E.IsClosed(err) {
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a.newError(E.New("write back udp: ", err))
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}
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continue
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case <-a.packetOutboundClosed:
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}
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for {
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select {
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case packet := <-a.packetOutbound:
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packet.buffer.Release()
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default:
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return
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}
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}
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}
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}
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func (a *myInboundAdapter) newError(err error) {
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a.logger.Error(err)
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}
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func (a *myInboundAdapter) NewError(ctx context.Context, err error) {
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common.Close(err)
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if E.IsClosed(err) {
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a.logger.WithContext(ctx).Debug("connection closed")
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return
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}
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a.logger.Error(err)
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}
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func (a *myInboundAdapter) writePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
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defer buffer.Release()
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if destination.IsFqdn() {
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udpAddr, err := net.ResolveUDPAddr(C.NetworkUDP, destination.String())
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if err != nil {
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return err
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}
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return common.Error(a.udpConn.WriteTo(buffer.Bytes(), udpAddr))
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}
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if a.packetForce6 && destination.Addr.Is4() {
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destination.Addr = netip.AddrFrom16(destination.Addr.As16())
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}
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return common.Error(a.udpConn.WriteToUDPAddrPort(buffer.Bytes(), destination.AddrPort()))
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}
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type myInboundPacketAdapter myInboundAdapter
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func (s *myInboundPacketAdapter) ReadPacket(buffer *buf.Buffer) (M.Socksaddr, error) {
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n, addr, err := s.udpConn.ReadFromUDPAddrPort(buffer.FreeBytes())
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if err != nil {
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return M.Socksaddr{}, err
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}
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buffer.Truncate(n)
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return M.SocksaddrFromNetIP(addr), nil
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}
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func (s *myInboundPacketAdapter) WriteIsThreadUnsafe() {
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}
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type myInboundPacket struct {
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buffer *buf.Buffer
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destination M.Socksaddr
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}
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func (s *myInboundPacketAdapter) Upstream() any {
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return s.udpConn
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}
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func (s *myInboundPacketAdapter) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
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s.packetAccess.RLock()
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defer s.packetAccess.RUnlock()
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select {
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case <-s.packetOutboundClosed:
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return os.ErrClosed
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default:
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}
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s.packetOutbound <- &myInboundPacket{buffer, destination}
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return nil
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}
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func (s *myInboundPacketAdapter) Close() error {
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return s.udpConn.Close()
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}
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func (s *myInboundPacketAdapter) LocalAddr() net.Addr {
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return s.udpConn.LocalAddr()
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}
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func (s *myInboundPacketAdapter) SetDeadline(t time.Time) error {
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return s.udpConn.SetDeadline(t)
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}
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func (s *myInboundPacketAdapter) SetReadDeadline(t time.Time) error {
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return s.udpConn.SetReadDeadline(t)
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}
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func (s *myInboundPacketAdapter) SetWriteDeadline(t time.Time) error {
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return s.udpConn.SetWriteDeadline(t)
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}
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