mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-12-05 04:46:40 +00:00
140 lines
4.6 KiB
Go
140 lines
4.6 KiB
Go
|
package direct
|
||
|
|
||
|
import (
|
||
|
"context"
|
||
|
"net"
|
||
|
"time"
|
||
|
|
||
|
"github.com/sagernet/sing-box/adapter"
|
||
|
"github.com/sagernet/sing-box/adapter/inbound"
|
||
|
"github.com/sagernet/sing-box/common/listener"
|
||
|
C "github.com/sagernet/sing-box/constant"
|
||
|
"github.com/sagernet/sing-box/log"
|
||
|
"github.com/sagernet/sing-box/option"
|
||
|
"github.com/sagernet/sing/common/buf"
|
||
|
M "github.com/sagernet/sing/common/metadata"
|
||
|
N "github.com/sagernet/sing/common/network"
|
||
|
"github.com/sagernet/sing/common/udpnat2"
|
||
|
)
|
||
|
|
||
|
func RegisterInbound(registry *inbound.Registry) {
|
||
|
inbound.Register[option.DirectInboundOptions](registry, C.TypeDirect, NewInbound)
|
||
|
}
|
||
|
|
||
|
type Inbound struct {
|
||
|
inbound.Adapter
|
||
|
ctx context.Context
|
||
|
router adapter.ConnectionRouterEx
|
||
|
logger log.ContextLogger
|
||
|
listener *listener.Listener
|
||
|
udpNat *udpnat.Service
|
||
|
overrideOption int
|
||
|
overrideDestination M.Socksaddr
|
||
|
}
|
||
|
|
||
|
func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.DirectInboundOptions) (adapter.Inbound, error) {
|
||
|
options.UDPFragmentDefault = true
|
||
|
inbound := &Inbound{
|
||
|
Adapter: inbound.NewAdapter(C.TypeDirect, tag),
|
||
|
ctx: ctx,
|
||
|
router: router,
|
||
|
logger: logger,
|
||
|
}
|
||
|
if options.OverrideAddress != "" && options.OverridePort != 0 {
|
||
|
inbound.overrideOption = 1
|
||
|
inbound.overrideDestination = M.ParseSocksaddrHostPort(options.OverrideAddress, options.OverridePort)
|
||
|
} else if options.OverrideAddress != "" {
|
||
|
inbound.overrideOption = 2
|
||
|
inbound.overrideDestination = M.ParseSocksaddrHostPort(options.OverrideAddress, options.OverridePort)
|
||
|
} else if options.OverridePort != 0 {
|
||
|
inbound.overrideOption = 3
|
||
|
inbound.overrideDestination = M.Socksaddr{Port: options.OverridePort}
|
||
|
}
|
||
|
var udpTimeout time.Duration
|
||
|
if options.UDPTimeout != 0 {
|
||
|
udpTimeout = time.Duration(options.UDPTimeout)
|
||
|
} else {
|
||
|
udpTimeout = C.UDPTimeout
|
||
|
}
|
||
|
inbound.udpNat = udpnat.New(inbound, inbound.preparePacketConnection, udpTimeout, false)
|
||
|
inbound.listener = listener.New(listener.Options{
|
||
|
Context: ctx,
|
||
|
Logger: logger,
|
||
|
Network: options.Network.Build(),
|
||
|
Listen: options.ListenOptions,
|
||
|
ConnectionHandler: inbound,
|
||
|
PacketHandler: inbound,
|
||
|
})
|
||
|
return inbound, nil
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) Start() error {
|
||
|
return i.listener.Start()
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) Close() error {
|
||
|
return i.listener.Close()
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
|
||
|
switch i.overrideOption {
|
||
|
case 1:
|
||
|
metadata.Destination = i.overrideDestination
|
||
|
case 2:
|
||
|
destination := i.overrideDestination
|
||
|
destination.Port = metadata.Destination.Port
|
||
|
metadata.Destination = destination
|
||
|
case 3:
|
||
|
metadata.Destination.Port = i.overrideDestination.Port
|
||
|
}
|
||
|
i.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
|
||
|
return i.router.RouteConnection(ctx, conn, metadata)
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) NewPacketEx(buffer *buf.Buffer, source M.Socksaddr) {
|
||
|
var destination M.Socksaddr
|
||
|
switch i.overrideOption {
|
||
|
case 1:
|
||
|
destination = i.overrideDestination
|
||
|
case 2:
|
||
|
destination = i.overrideDestination
|
||
|
destination.Port = source.Port
|
||
|
case 3:
|
||
|
destination = source
|
||
|
destination.Port = i.overrideDestination.Port
|
||
|
}
|
||
|
i.udpNat.NewPacket([][]byte{buffer.Bytes()}, source, destination, nil)
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
|
||
|
i.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
|
||
|
metadata.Inbound = i.Tag()
|
||
|
metadata.InboundType = i.Type()
|
||
|
i.router.RouteConnectionEx(ctx, conn, metadata, onClose)
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) NewPacketConnectionEx(ctx context.Context, conn N.PacketConn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
|
||
|
i.logger.InfoContext(ctx, "inbound packet connection from ", source)
|
||
|
i.logger.InfoContext(ctx, "inbound packet connection to ", destination)
|
||
|
var metadata adapter.InboundContext
|
||
|
metadata.Inbound = i.Tag()
|
||
|
metadata.InboundType = i.Type()
|
||
|
metadata.Source = source
|
||
|
metadata.Destination = destination
|
||
|
metadata.OriginDestination = i.listener.UDPAddr()
|
||
|
i.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
|
||
|
}
|
||
|
|
||
|
func (i *Inbound) preparePacketConnection(source M.Socksaddr, destination M.Socksaddr, userData any) (bool, context.Context, N.PacketWriter, N.CloseHandlerFunc) {
|
||
|
return true, log.ContextWithNewID(i.ctx), &directPacketWriter{i.listener.PacketWriter(), source}, nil
|
||
|
}
|
||
|
|
||
|
type directPacketWriter struct {
|
||
|
writer N.PacketWriter
|
||
|
source M.Socksaddr
|
||
|
}
|
||
|
|
||
|
func (w *directPacketWriter) WritePacket(buffer *buf.Buffer, addr M.Socksaddr) error {
|
||
|
return w.writer.WritePacket(buffer, w.source)
|
||
|
}
|