mirror of https://github.com/v2ray/v2ray-core
138 lines
3.6 KiB
Go
138 lines
3.6 KiB
Go
package dokodemo
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//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg dokodemo -path Proxy,Dokodemo
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import (
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"context"
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"time"
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"v2ray.com/core"
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"v2ray.com/core/common"
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"v2ray.com/core/common/buf"
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"v2ray.com/core/common/net"
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"v2ray.com/core/common/signal"
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"v2ray.com/core/proxy"
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"v2ray.com/core/transport/internet"
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"v2ray.com/core/transport/internet/udp"
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)
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type DokodemoDoor struct {
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policyManager core.PolicyManager
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config *Config
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address net.Address
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port net.Port
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v *core.Instance
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}
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func New(ctx context.Context, config *Config) (*DokodemoDoor, error) {
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if config.NetworkList == nil || config.NetworkList.Size() == 0 {
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return nil, newError("no network specified")
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}
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v := core.FromContext(ctx)
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if v == nil {
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return nil, newError("V is not in context.")
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}
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d := &DokodemoDoor{
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config: config,
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address: config.GetPredefinedAddress(),
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port: net.Port(config.Port),
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policyManager: v.PolicyManager(),
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}
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return d, nil
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}
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func (d *DokodemoDoor) Network() net.NetworkList {
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return *(d.config.NetworkList)
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}
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func (d *DokodemoDoor) policy() core.Policy {
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config := d.config
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p := d.policyManager.ForLevel(config.UserLevel)
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if config.Timeout > 0 && config.UserLevel == 0 {
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p.Timeouts.ConnectionIdle = time.Duration(config.Timeout) * time.Second
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}
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return p
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}
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func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher core.Dispatcher) error {
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newError("processing connection from: ", conn.RemoteAddr()).AtDebug().WriteToLog()
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dest := net.Destination{
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Network: network,
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Address: d.address,
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Port: d.port,
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}
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if d.config.FollowRedirect {
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if origDest, ok := proxy.OriginalTargetFromContext(ctx); ok {
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dest = origDest
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}
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}
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if !dest.IsValid() || dest.Address == nil {
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return newError("unable to get destination")
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}
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ctx, cancel := context.WithCancel(ctx)
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timer := signal.CancelAfterInactivity(ctx, cancel, d.policy().Timeouts.ConnectionIdle)
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inboundRay, err := dispatcher.Dispatch(ctx, dest)
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if err != nil {
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return newError("failed to dispatch request").Base(err)
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}
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requestDone := signal.ExecuteAsync(func() error {
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defer inboundRay.InboundInput().Close()
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chunkReader := buf.NewReader(conn)
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if err := buf.Copy(chunkReader, inboundRay.InboundInput(), buf.UpdateActivity(timer)); err != nil {
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return newError("failed to transport request").Base(err)
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}
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timer.SetTimeout(d.policy().Timeouts.DownlinkOnly)
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return nil
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})
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responseDone := signal.ExecuteAsync(func() error {
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var writer buf.Writer
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if network == net.Network_TCP {
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writer = buf.NewWriter(conn)
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} else {
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//if we are in TPROXY mode, use linux's udp forging functionality
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if !d.config.FollowRedirect {
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writer = buf.NewSequentialWriter(conn)
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} else {
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srca := net.UDPAddr{IP: dest.Address.IP(), Port: int(dest.Port.Value())}
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origsend, err := udp.TransmitSocket(&srca, conn.RemoteAddr())
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if err != nil {
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return err
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}
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writer = buf.NewSequentialWriter(origsend)
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}
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}
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if err := buf.Copy(inboundRay.InboundOutput(), writer, buf.UpdateActivity(timer)); err != nil {
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return newError("failed to transport response").Base(err)
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}
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timer.SetTimeout(d.policy().Timeouts.UplinkOnly)
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return nil
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})
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if err := signal.ErrorOrFinish2(ctx, requestDone, responseDone); err != nil {
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inboundRay.InboundInput().CloseError()
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inboundRay.InboundOutput().CloseError()
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return newError("connection ends").Base(err)
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}
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return nil
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}
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func init() {
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common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
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return New(ctx, config.(*Config))
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}))
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}
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