2021-08-21 01:20:40 -04:00
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//go:build !confonly
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2019-02-01 14:08:21 -05:00
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// +build !confonly
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2016-01-27 06:46:40 -05:00
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package shadowsocks
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import (
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2017-01-12 18:56:21 -05:00
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"context"
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2017-02-03 16:35:09 -05:00
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"time"
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2017-01-12 18:56:21 -05:00
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2021-02-16 15:31:50 -05:00
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core "github.com/v2fly/v2ray-core/v4"
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"github.com/v2fly/v2ray-core/v4/common"
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"github.com/v2fly/v2ray-core/v4/common/buf"
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"github.com/v2fly/v2ray-core/v4/common/log"
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"github.com/v2fly/v2ray-core/v4/common/net"
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"github.com/v2fly/v2ray-core/v4/common/protocol"
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udp_proto "github.com/v2fly/v2ray-core/v4/common/protocol/udp"
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"github.com/v2fly/v2ray-core/v4/common/session"
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"github.com/v2fly/v2ray-core/v4/common/signal"
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"github.com/v2fly/v2ray-core/v4/common/task"
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"github.com/v2fly/v2ray-core/v4/features/policy"
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"github.com/v2fly/v2ray-core/v4/features/routing"
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"github.com/v2fly/v2ray-core/v4/transport/internet"
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"github.com/v2fly/v2ray-core/v4/transport/internet/udp"
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2016-01-27 06:46:40 -05:00
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)
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2016-05-12 13:42:08 -04:00
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type Server struct {
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config *ServerConfig
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user *protocol.MemoryUser
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policyManager policy.Manager
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2016-01-31 11:01:28 -05:00
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}
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2017-04-07 16:45:07 -04:00
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// NewServer create a new Shadowsocks server.
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func NewServer(ctx context.Context, config *ServerConfig) (*Server, error) {
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if config.GetUser() == nil {
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return nil, newError("user is not specified")
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}
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2016-10-31 10:24:28 -04:00
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2018-08-26 18:11:32 -04:00
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mUser, err := config.User.ToMemoryUser()
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2016-11-02 11:17:57 -04:00
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if err != nil {
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return nil, newError("failed to parse user account").Base(err)
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2016-11-02 11:17:57 -04:00
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}
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2018-10-21 04:27:13 -04:00
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v := core.MustFromContext(ctx)
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2016-09-17 18:41:21 -04:00
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s := &Server{
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config: config,
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user: mUser,
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policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
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}
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2017-11-27 16:09:30 -05:00
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2016-09-17 18:41:21 -04:00
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return s, nil
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}
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2018-11-20 10:58:26 -05:00
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func (s *Server) Network() []net.Network {
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list := s.config.Network
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if len(list) == 0 {
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list = append(list, net.Network_TCP)
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}
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2017-01-26 14:46:44 -05:00
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if s.config.UdpEnabled {
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list = append(list, net.Network_UDP)
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2017-01-14 18:57:06 -05:00
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}
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return list
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}
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2018-10-11 14:43:37 -04:00
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func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
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switch network {
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case net.Network_TCP:
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return s.handleConnection(ctx, conn, dispatcher)
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case net.Network_UDP:
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return s.handlerUDPPayload(ctx, conn, dispatcher)
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default:
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return newError("unknown network: ", network)
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2016-01-29 10:43:45 -05:00
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}
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2016-01-27 16:11:31 -05:00
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}
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2018-10-11 14:43:37 -04:00
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func (s *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection, dispatcher routing.Dispatcher) error {
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2019-01-05 15:43:22 -05:00
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udpServer := udp.NewDispatcher(dispatcher, func(ctx context.Context, packet *udp_proto.Packet) {
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2018-07-03 15:38:02 -04:00
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request := protocol.RequestHeaderFromContext(ctx)
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if request == nil {
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return
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}
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2019-01-05 15:43:22 -05:00
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payload := packet.Payload
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2018-07-03 15:38:02 -04:00
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data, err := EncodeUDPPacket(request, payload.Bytes())
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payload.Release()
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if err != nil {
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newError("failed to encode UDP packet").Base(err).AtWarning().WriteToLog(session.ExportIDToError(ctx))
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return
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}
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defer data.Release()
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conn.Write(data.Bytes())
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})
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2016-01-28 15:30:05 -05:00
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2018-10-15 02:36:50 -04:00
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inbound := session.InboundFromContext(ctx)
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if inbound == nil {
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panic("no inbound metadata")
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}
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inbound.User = s.user
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2019-02-07 13:14:37 -05:00
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reader := buf.NewPacketReader(conn)
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for {
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mpayload, err := reader.ReadMultiBuffer()
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2016-01-28 15:30:05 -05:00
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if err != nil {
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break
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2016-01-28 15:30:05 -05:00
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}
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2017-04-15 15:07:23 -04:00
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for _, payload := range mpayload {
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request, data, err := DecodeUDPPacket(s.user, payload)
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2017-04-15 15:07:23 -04:00
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if err != nil {
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2018-09-18 17:09:54 -04:00
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if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Source.IsValid() {
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newError("dropping invalid UDP packet from: ", inbound.Source).Base(err).WriteToLog(session.ExportIDToError(ctx))
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log.Record(&log.AccessMessage{
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From: inbound.Source,
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To: "",
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Status: log.AccessRejected,
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Reason: err,
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})
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}
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payload.Release()
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continue
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}
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2016-01-27 16:11:31 -05:00
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2020-06-19 05:52:39 -04:00
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currentPacketCtx := ctx
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2017-04-15 15:07:23 -04:00
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dest := request.Destination()
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if inbound.Source.IsValid() {
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currentPacketCtx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
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From: inbound.Source,
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To: dest,
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Status: log.AccessAccepted,
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Reason: "",
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Email: request.User.Email,
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2017-12-19 15:28:12 -05:00
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})
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2017-04-15 15:07:23 -04:00
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}
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2020-06-19 05:52:39 -04:00
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newError("tunnelling request to ", dest).WriteToLog(session.ExportIDToError(currentPacketCtx))
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2016-11-02 11:17:57 -04:00
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2020-06-19 05:52:39 -04:00
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currentPacketCtx = protocol.ContextWithRequestHeader(currentPacketCtx, request)
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udpServer.Dispatch(currentPacketCtx, dest, data)
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2017-04-15 15:07:23 -04:00
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}
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2017-01-26 14:46:44 -05:00
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}
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2016-01-28 15:30:05 -05:00
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2017-01-26 14:46:44 -05:00
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return nil
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2016-01-28 15:30:05 -05:00
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}
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2018-10-11 14:43:37 -04:00
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func (s *Server) handleConnection(ctx context.Context, conn internet.Connection, dispatcher routing.Dispatcher) error {
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2018-10-21 04:27:13 -04:00
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sessionPolicy := s.policyManager.ForLevel(s.user.Level)
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2018-01-10 06:22:37 -05:00
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conn.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake))
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2018-07-31 10:05:57 -04:00
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2018-08-17 14:54:25 -04:00
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bufferedReader := buf.BufferedReader{Reader: buf.NewReader(conn)}
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2018-04-20 18:54:53 -04:00
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request, bodyReader, err := ReadTCPSession(s.user, &bufferedReader)
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2016-01-28 06:33:58 -05:00
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if err != nil {
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2017-12-19 15:28:12 -05:00
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log.Record(&log.AccessMessage{
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From: conn.RemoteAddr(),
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To: "",
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Status: log.AccessRejected,
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Reason: err,
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})
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2017-04-08 19:43:25 -04:00
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return newError("failed to create request from: ", conn.RemoteAddr()).Base(err)
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2016-01-28 06:33:58 -05:00
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}
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2017-01-31 10:49:59 -05:00
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conn.SetReadDeadline(time.Time{})
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2016-10-31 10:24:28 -04:00
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2018-10-15 02:36:50 -04:00
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inbound := session.InboundFromContext(ctx)
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if inbound == nil {
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panic("no inbound metadata")
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}
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inbound.User = s.user
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2016-10-31 10:24:28 -04:00
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dest := request.Destination()
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2019-06-12 01:04:34 -04:00
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ctx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
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2017-12-19 15:28:12 -05:00
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From: conn.RemoteAddr(),
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To: dest,
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Status: log.AccessAccepted,
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Reason: "",
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2019-06-18 05:47:46 -04:00
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Email: request.User.Email,
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2017-12-19 15:28:12 -05:00
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})
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2018-06-24 19:09:02 -04:00
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newError("tunnelling request to ", dest).WriteToLog(session.ExportIDToError(ctx))
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2016-01-30 16:57:20 -05:00
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2017-11-14 18:36:14 -05:00
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ctx, cancel := context.WithCancel(ctx)
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2018-01-10 06:22:37 -05:00
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timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
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2018-05-25 06:08:28 -04:00
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2018-10-11 16:34:31 -04:00
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ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
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2018-04-16 18:31:10 -04:00
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link, err := dispatcher.Dispatch(ctx, dest)
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2017-02-03 16:35:09 -05:00
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if err != nil {
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return err
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}
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2016-01-28 06:33:58 -05:00
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2018-04-11 10:45:09 -04:00
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responseDone := func() error {
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2018-02-23 11:07:45 -05:00
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defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
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2017-11-09 16:33:15 -05:00
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bufferedWriter := buf.NewBufferedWriter(buf.NewWriter(conn))
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2016-10-31 10:24:28 -04:00
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responseWriter, err := WriteTCPResponse(request, bufferedWriter)
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if err != nil {
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2017-04-08 19:43:25 -04:00
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return newError("failed to write response").Base(err)
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2016-10-31 10:24:28 -04:00
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}
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2016-02-23 12:16:13 -05:00
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2018-03-28 16:23:24 -04:00
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{
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2018-04-16 18:31:10 -04:00
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payload, err := link.Reader.ReadMultiBuffer()
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2018-03-28 16:23:24 -04:00
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if err != nil {
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return err
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}
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if err := responseWriter.WriteMultiBuffer(payload); err != nil {
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return err
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}
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2017-01-06 05:40:49 -05:00
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}
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if err := bufferedWriter.SetBuffered(false); err != nil {
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return err
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}
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2016-04-18 13:01:24 -04:00
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2018-04-16 18:31:10 -04:00
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if err := buf.Copy(link.Reader, responseWriter, buf.UpdateActivity(timer)); err != nil {
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2017-04-08 19:43:25 -04:00
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return newError("failed to transport all TCP response").Base(err)
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2016-01-28 07:40:00 -05:00
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}
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2016-01-28 06:33:58 -05:00
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2016-12-29 18:32:20 -05:00
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return nil
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2018-04-11 10:45:09 -04:00
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}
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2016-12-29 18:32:20 -05:00
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2018-04-11 10:45:09 -04:00
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requestDone := func() error {
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2018-02-23 11:07:45 -05:00
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defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
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2016-12-29 18:32:20 -05:00
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2018-04-16 18:31:10 -04:00
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if err := buf.Copy(bodyReader, link.Writer, buf.UpdateActivity(timer)); err != nil {
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2017-04-08 19:43:25 -04:00
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return newError("failed to transport all TCP request").Base(err)
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2016-12-29 18:32:20 -05:00
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}
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2018-02-23 11:07:45 -05:00
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2016-12-29 18:32:20 -05:00
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return nil
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2018-04-11 10:45:09 -04:00
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}
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2016-01-28 06:33:58 -05:00
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2021-05-19 17:28:52 -04:00
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requestDoneAndCloseWriter := task.OnSuccess(requestDone, task.Close(link.Writer))
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2018-12-06 05:35:02 -05:00
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if err := task.Run(ctx, requestDoneAndCloseWriter, responseDone); err != nil {
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2018-12-31 15:25:10 -05:00
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common.Interrupt(link.Reader)
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common.Interrupt(link.Writer)
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2017-04-08 19:43:25 -04:00
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return newError("connection ends").Base(err)
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2016-12-29 18:32:20 -05:00
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}
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2017-01-26 14:46:44 -05:00
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return nil
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2016-01-28 06:33:58 -05:00
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}
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2017-01-12 18:56:21 -05:00
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func init() {
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common.Must(common.RegisterConfig((*ServerConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
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return NewServer(ctx, config.(*ServerConfig))
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}))
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2016-06-14 16:54:08 -04:00
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}
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