70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
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package quic
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import (
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"context"
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"fmt"
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"io"
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"time"
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"zombiezen.com/go/capnproto2/rpc"
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"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
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)
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// HandleRequestFunc wraps the proxied request from the upstream and also provides methods on the stream to
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// handle the response back.
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type HandleRequestFunc = func(ctx context.Context, stream *RequestServerStream) error
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// CloudflaredServer provides a handler interface for a client to provide methods to handle the different types of
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// requests that can be communicated by the stream.
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type CloudflaredServer struct {
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handleRequest HandleRequestFunc
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sessionManager pogs.SessionManager
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configManager pogs.ConfigurationManager
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responseTimeout time.Duration
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}
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func NewCloudflaredServer(handleRequest HandleRequestFunc, sessionManager pogs.SessionManager, configManager pogs.ConfigurationManager, responseTimeout time.Duration) *CloudflaredServer {
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return &CloudflaredServer{
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handleRequest: handleRequest,
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sessionManager: sessionManager,
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configManager: configManager,
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responseTimeout: responseTimeout,
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}
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}
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// Serve executes the defined handlers in ServerStream on the provided stream if it is a proper RPC stream with the
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// correct preamble protocol signature.
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func (s *CloudflaredServer) Serve(ctx context.Context, stream io.ReadWriteCloser) error {
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signature, err := determineProtocol(stream)
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if err != nil {
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return err
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}
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switch signature {
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case dataStreamProtocolSignature:
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return s.handleRequest(ctx, &RequestServerStream{stream})
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case rpcStreamProtocolSignature:
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return s.handleRPC(ctx, stream)
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default:
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return fmt.Errorf("unknown protocol %v", signature)
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}
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}
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func (s *CloudflaredServer) handleRPC(ctx context.Context, stream io.ReadWriteCloser) error {
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ctx, cancel := context.WithTimeout(ctx, s.responseTimeout)
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defer cancel()
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transport := rpc.StreamTransport(stream)
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defer transport.Close()
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main := pogs.CloudflaredServer_ServerToClient(s.sessionManager, s.configManager)
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rpcConn := rpc.NewConn(transport, rpc.MainInterface(main.Client))
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defer rpcConn.Close()
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// We ignore the errors here because if cloudflared fails to handle a request, we will just move on.
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select {
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case <-rpcConn.Done():
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case <-ctx.Done():
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}
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return nil
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}
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