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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-11-10 14:26:26 -05:00
v2fly/proxy/vlite/inbound/inbound.go
2022-08-19 20:09:39 +08:00

205 lines
6.5 KiB
Go

package inbound
import (
"context"
"io"
gonet "net"
"strconv"
"sync"
"github.com/mustafaturan/bus"
"github.com/xiaokangwang/VLite/interfaces"
"github.com/xiaokangwang/VLite/interfaces/ibus"
"github.com/xiaokangwang/VLite/transport"
udpsctpserver "github.com/xiaokangwang/VLite/transport/packetsctp/sctprelay"
"github.com/xiaokangwang/VLite/transport/packetuni/puniServer"
"github.com/xiaokangwang/VLite/transport/udp/udpServer"
"github.com/xiaokangwang/VLite/transport/udp/udpuni/udpunis"
"github.com/xiaokangwang/VLite/transport/uni/uniserver"
"github.com/xiaokangwang/VLite/workers/server"
"github.com/v2fly/v2ray-core/v5/common"
"github.com/v2fly/v2ray-core/v5/common/environment"
"github.com/v2fly/v2ray-core/v5/common/environment/envctx"
"github.com/v2fly/v2ray-core/v5/common/net"
"github.com/v2fly/v2ray-core/v5/common/session"
"github.com/v2fly/v2ray-core/v5/common/signal/done"
"github.com/v2fly/v2ray-core/v5/features/routing"
"github.com/v2fly/v2ray-core/v5/transport/internet"
)
//go:generate go run github.com/v2fly/v2ray-core/v5/common/errors/errorgen
func NewUDPInboundHandler(ctx context.Context, config *UDPProtocolConfig) (*Handler, error) {
proxyEnvironment := envctx.EnvironmentFromContext(ctx).(environment.ProxyEnvironment)
statusInstance, err := createStatusFromConfig(config)
if err != nil {
return nil, newError("unable to initialize vlite").Base(err)
}
proxyEnvironment.TransientStorage().Put(ctx, "status", statusInstance)
return &Handler{ctx: ctx}, nil
}
type Handler struct {
ctx context.Context
}
func (h *Handler) Network() []net.Network {
list := []net.Network{net.Network_UDP}
return list
}
type status struct {
config *UDPProtocolConfig
password []byte
msgbus *bus.Bus
ctx context.Context
transport transport.UnderlayTransportListener
access sync.Mutex
}
func (s *status) RelayStream(conn io.ReadWriteCloser, ctx context.Context) { //nolint:revive
}
func (s *status) Connection(conn gonet.Conn, connctx context.Context) context.Context { //nolint:revive,stylecheck
S_S2CTraffic := make(chan server.UDPServerTxToClientTraffic, 8) //nolint:revive,stylecheck
S_S2CDataTraffic := make(chan server.UDPServerTxToClientDataTraffic, 8) //nolint:revive,stylecheck
S_C2STraffic := make(chan server.UDPServerRxFromClientTraffic, 8) //nolint:revive,stylecheck
S_S2CTraffic2 := make(chan interfaces.TrafficWithChannelTag, 8) //nolint:revive,stylecheck
S_S2CDataTraffic2 := make(chan interfaces.TrafficWithChannelTag, 8) //nolint:revive,stylecheck
S_C2STraffic2 := make(chan interfaces.TrafficWithChannelTag, 8) //nolint:revive,stylecheck
go func(ctx context.Context) {
for {
select {
case data := <-S_S2CTraffic:
S_S2CTraffic2 <- interfaces.TrafficWithChannelTag(data)
case <-ctx.Done():
return
}
}
}(connctx)
go func(ctx context.Context) {
for {
select {
case data := <-S_S2CDataTraffic:
S_S2CDataTraffic2 <- interfaces.TrafficWithChannelTag(data)
case <-ctx.Done():
return
}
}
}(connctx)
go func(ctx context.Context) {
for {
select {
case data := <-S_C2STraffic2:
S_C2STraffic <- server.UDPServerRxFromClientTraffic(data)
case <-ctx.Done():
return
}
}
}(connctx)
if !s.config.EnableStabilization || !s.config.EnableRenegotiation {
relay := udpsctpserver.NewPacketRelayServer(conn, S_S2CTraffic2, S_S2CDataTraffic2, S_C2STraffic2, s, s.password, connctx)
udpserver := server.UDPServer(connctx, S_S2CTraffic, S_S2CDataTraffic, S_C2STraffic, relay)
_ = udpserver
} else {
relay := puniServer.NewPacketUniServer(S_S2CTraffic2, S_S2CDataTraffic2, S_C2STraffic2, s, s.password, connctx)
relay.OnAutoCarrier(conn, connctx)
udpserver := server.UDPServer(connctx, S_S2CTraffic, S_S2CDataTraffic, S_C2STraffic, relay)
_ = udpserver
}
return connctx
}
func createStatusFromConfig(config *UDPProtocolConfig) (*status, error) { //nolint:unparam
s := &status{ctx: context.Background(), config: config}
s.password = []byte(config.Password)
s.msgbus = ibus.NewMessageBus()
s.ctx = context.WithValue(s.ctx, interfaces.ExtraOptionsMessageBus, s.msgbus) //nolint:revive,staticcheck
if config.ScramblePacket {
s.ctx = context.WithValue(s.ctx, interfaces.ExtraOptionsUDPShouldMask, true) //nolint:revive,staticcheck
}
if s.config.EnableFec {
s.ctx = context.WithValue(s.ctx, interfaces.ExtraOptionsUDPFECEnabled, true) //nolint:revive,staticcheck
}
s.ctx = context.WithValue(s.ctx, interfaces.ExtraOptionsUDPMask, string(s.password)) //nolint:revive,staticcheck
if config.HandshakeMaskingPaddingSize != 0 {
ctxv := &interfaces.ExtraOptionsUsePacketArmorValue{PacketArmorPaddingTo: int(config.HandshakeMaskingPaddingSize), UsePacketArmor: true}
s.ctx = context.WithValue(s.ctx, interfaces.ExtraOptionsUsePacketArmor, ctxv) //nolint:revive,staticcheck
}
return s, nil
}
func enableInterface(s *status) error {
s.transport = s
if s.config.EnableStabilization {
s.transport = uniserver.NewUnifiedConnectionTransportHub(s, s.ctx)
}
if s.config.EnableStabilization {
s.transport = udpunis.NewUdpUniServer(string(s.password), s.ctx, s.transport)
}
return nil
}
func (h *Handler) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
proxyEnvironment := envctx.EnvironmentFromContext(h.ctx).(environment.ProxyEnvironment)
statusInstanceIfce, err := proxyEnvironment.TransientStorage().Get(ctx, "status")
if err != nil {
return newError("uninitialized handler").Base(err)
}
statusInstance := statusInstanceIfce.(*status)
err = h.ensureStarted(statusInstance)
if err != nil {
return newError("unable to initialize").Base(err)
}
finish := done.New()
conn = newUDPConnAdaptor(conn, finish)
var initialData [1600]byte
c, err := conn.Read(initialData[:])
if err != nil {
return newError("unable to read initial data").Base(err)
}
connID := session.IDFromContext(ctx)
vconn, connctx := udpServer.PrepareIncomingUDPConnection(conn, statusInstance.ctx, initialData[:c], strconv.FormatInt(int64(connID), 10))
connctx = statusInstance.transport.Connection(vconn, connctx)
if connctx == nil {
return newError("invalid connection discarded")
}
<-finish.Wait()
return nil
}
func (h *Handler) ensureStarted(s *status) error {
s.access.Lock()
defer s.access.Unlock()
if s.transport == nil {
err := enableInterface(s)
if err != nil {
return err
}
}
return nil
}
func init() {
common.Must(common.RegisterConfig((*UDPProtocolConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
return NewUDPInboundHandler(ctx, config.(*UDPProtocolConfig))
}))
}