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78 lines
2.2 KiB
78 lines
2.2 KiB
package mtproto
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import (
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"context"
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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/crypto"
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"v2ray.com/core/common/net"
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"v2ray.com/core/common/session"
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"v2ray.com/core/common/task"
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"v2ray.com/core/transport"
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"v2ray.com/core/transport/internet"
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)
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type Client struct {
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}
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func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
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return &Client{}, nil
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}
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func (c *Client) Process(ctx context.Context, link *transport.Link, dialer internet.Dialer) error {
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outbound := session.OutboundFromContext(ctx)
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if outbound == nil || !outbound.Target.IsValid() {
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return newError("unknown destination.")
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}
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dest := outbound.Target
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if dest.Network != net.Network_TCP {
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return newError("not TCP traffic", dest)
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}
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conn, err := dialer.Dial(ctx, dest)
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if err != nil {
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return newError("failed to dial to ", dest).Base(err).AtWarning()
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}
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defer conn.Close() // nolint: errcheck
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sc := SessionContextFromContext(ctx)
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auth := NewAuthentication(sc)
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defer putAuthenticationObject(auth)
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request := func() error {
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encryptor := crypto.NewAesCTRStream(auth.EncodingKey[:], auth.EncodingNonce[:])
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var header [HeaderSize]byte
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encryptor.XORKeyStream(header[:], auth.Header[:])
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copy(header[:56], auth.Header[:])
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if _, err := conn.Write(header[:]); err != nil {
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return newError("failed to write auth header").Base(err)
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}
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connWriter := buf.NewWriter(crypto.NewCryptionWriter(encryptor, conn))
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return buf.Copy(link.Reader, connWriter)
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}
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response := func() error {
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decryptor := crypto.NewAesCTRStream(auth.DecodingKey[:], auth.DecodingNonce[:])
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connReader := buf.NewReader(crypto.NewCryptionReader(decryptor, conn))
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return buf.Copy(connReader, link.Writer)
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}
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var responseDoneAndCloseWriter = task.Single(response, task.OnSuccess(task.Close(link.Writer)))
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if err := task.Run(task.WithContext(ctx), task.Parallel(request, responseDoneAndCloseWriter))(); err != nil {
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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((*ClientConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
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return NewClient(ctx, config.(*ClientConfig))
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}))
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}
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