mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-08-30 00:04:21 -04:00
204 lines
5.2 KiB
Go
204 lines
5.2 KiB
Go
package socks
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"runtime"
|
|
"time"
|
|
|
|
"v2ray.com/core/app"
|
|
"v2ray.com/core/app/dispatcher"
|
|
"v2ray.com/core/app/log"
|
|
"v2ray.com/core/common"
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/common/protocol"
|
|
"v2ray.com/core/common/signal"
|
|
"v2ray.com/core/proxy"
|
|
"v2ray.com/core/transport/internet"
|
|
"v2ray.com/core/transport/internet/udp"
|
|
)
|
|
|
|
// Server is a SOCKS 5 proxy server
|
|
type Server struct {
|
|
config *ServerConfig
|
|
}
|
|
|
|
// NewServer creates a new Server object.
|
|
func NewServer(ctx context.Context, config *ServerConfig) (*Server, error) {
|
|
space := app.SpaceFromContext(ctx)
|
|
if space == nil {
|
|
return nil, newError("no space in context").AtWarning()
|
|
}
|
|
s := &Server{
|
|
config: config,
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
func (s *Server) Network() net.NetworkList {
|
|
list := net.NetworkList{
|
|
Network: []net.Network{net.Network_TCP},
|
|
}
|
|
if s.config.UdpEnabled {
|
|
list.Network = append(list.Network, net.Network_UDP)
|
|
}
|
|
return list
|
|
}
|
|
|
|
func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher dispatcher.Interface) error {
|
|
switch network {
|
|
case net.Network_TCP:
|
|
return s.processTCP(ctx, conn, dispatcher)
|
|
case net.Network_UDP:
|
|
return s.handleUDPPayload(ctx, conn, dispatcher)
|
|
default:
|
|
return newError("unknown network: ", network)
|
|
}
|
|
}
|
|
|
|
func (s *Server) processTCP(ctx context.Context, conn internet.Connection, dispatcher dispatcher.Interface) error {
|
|
conn.SetReadDeadline(time.Now().Add(time.Second * 8))
|
|
reader := buf.NewBufferedReader(conn)
|
|
|
|
inboundDest, ok := proxy.InboundEntryPointFromContext(ctx)
|
|
if !ok {
|
|
return newError("inbound entry point not specified")
|
|
}
|
|
session := &ServerSession{
|
|
config: s.config,
|
|
port: inboundDest.Port,
|
|
}
|
|
|
|
request, err := session.Handshake(reader, conn)
|
|
if err != nil {
|
|
if source, ok := proxy.SourceFromContext(ctx); ok {
|
|
log.Access(source, "", log.AccessRejected, err)
|
|
}
|
|
return newError("failed to read request").Base(err)
|
|
}
|
|
conn.SetReadDeadline(time.Time{})
|
|
|
|
if request.Command == protocol.RequestCommandTCP {
|
|
dest := request.Destination()
|
|
log.Trace(newError("TCP Connect request to ", dest))
|
|
if source, ok := proxy.SourceFromContext(ctx); ok {
|
|
log.Access(source, dest, log.AccessAccepted, "")
|
|
}
|
|
|
|
return s.transport(ctx, reader, conn, dest, dispatcher)
|
|
}
|
|
|
|
if request.Command == protocol.RequestCommandUDP {
|
|
return s.handleUDP()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (*Server) handleUDP() error {
|
|
// The TCP connection closes after v method returns. We need to wait until
|
|
// the client closes it.
|
|
// TODO: get notified from UDP part
|
|
time.Sleep(5 * time.Minute)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (v *Server) transport(ctx context.Context, reader io.Reader, writer io.Writer, dest net.Destination, dispatcher dispatcher.Interface) error {
|
|
timeout := time.Second * time.Duration(v.config.Timeout)
|
|
if timeout == 0 {
|
|
timeout = time.Minute * 2
|
|
}
|
|
ctx, timer := signal.CancelAfterInactivity(ctx, timeout)
|
|
|
|
ray, err := dispatcher.Dispatch(ctx, dest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
input := ray.InboundInput()
|
|
output := ray.InboundOutput()
|
|
|
|
requestDone := signal.ExecuteAsync(func() error {
|
|
defer input.Close()
|
|
|
|
v2reader := buf.NewReader(reader)
|
|
if err := buf.Copy(v2reader, input, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transport all TCP request").Base(err)
|
|
}
|
|
return nil
|
|
})
|
|
|
|
responseDone := signal.ExecuteAsync(func() error {
|
|
v2writer := buf.NewWriter(writer)
|
|
if err := buf.Copy(output, v2writer, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transport all TCP response").Base(err)
|
|
}
|
|
return nil
|
|
})
|
|
|
|
if err := signal.ErrorOrFinish2(ctx, requestDone, responseDone); err != nil {
|
|
input.CloseError()
|
|
output.CloseError()
|
|
return newError("connection ends").Base(err)
|
|
}
|
|
|
|
runtime.KeepAlive(timer)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (v *Server) handleUDPPayload(ctx context.Context, conn internet.Connection, dispatcher dispatcher.Interface) error {
|
|
udpServer := udp.NewDispatcher(dispatcher)
|
|
|
|
if source, ok := proxy.SourceFromContext(ctx); ok {
|
|
log.Trace(newError("client UDP connection from ", source))
|
|
}
|
|
|
|
reader := buf.NewReader(conn)
|
|
for {
|
|
mpayload, err := reader.Read()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, payload := range mpayload {
|
|
request, data, err := DecodeUDPPacket(payload.Bytes())
|
|
|
|
if err != nil {
|
|
log.Trace(newError("failed to parse UDP request").Base(err))
|
|
continue
|
|
}
|
|
|
|
if len(data) == 0 {
|
|
continue
|
|
}
|
|
|
|
log.Trace(newError("send packet to ", request.Destination(), " with ", len(data), " bytes").AtDebug())
|
|
if source, ok := proxy.SourceFromContext(ctx); ok {
|
|
log.Access(source, request.Destination, log.AccessAccepted, "")
|
|
}
|
|
|
|
dataBuf := buf.New()
|
|
dataBuf.Append(data)
|
|
udpServer.Dispatch(ctx, request.Destination(), dataBuf, func(payload *buf.Buffer) {
|
|
defer payload.Release()
|
|
|
|
log.Trace(newError("writing back UDP response with ", payload.Len(), " bytes").AtDebug())
|
|
|
|
udpMessage := EncodeUDPPacket(request, payload.Bytes())
|
|
defer udpMessage.Release()
|
|
|
|
conn.Write(udpMessage.Bytes())
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*ServerConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
return NewServer(ctx, config.(*ServerConfig))
|
|
}))
|
|
}
|