Update vendor

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

vendor/github.com/containerd/ttrpc/client.go

@@ -71,6 +71,42 @@ func WithUnaryClientInterceptor(i UnaryClientInterceptor) ClientOpts {
 	}
 }
 
+// WithChainUnaryClientInterceptor sets the provided chain of client interceptors
+func WithChainUnaryClientInterceptor(interceptors ...UnaryClientInterceptor) ClientOpts {
+	return func(c *Client) {
+		if len(interceptors) == 0 {
+			return
+		}
+		if c.interceptor != nil {
+			interceptors = append([]UnaryClientInterceptor{c.interceptor}, interceptors...)
+		}
+		c.interceptor = func(
+			ctx context.Context,
+			req *Request,
+			reply *Response,
+			info *UnaryClientInfo,
+			final Invoker,
+		) error {
+			return interceptors[0](ctx, req, reply, info,
+				chainUnaryInterceptors(interceptors[1:], final, info))
+		}
+	}
+}
+
+func chainUnaryInterceptors(interceptors []UnaryClientInterceptor, final Invoker, info *UnaryClientInfo) Invoker {
+	if len(interceptors) == 0 {
+		return final
+	}
+	return func(
+		ctx context.Context,
+		req *Request,
+		reply *Response,
+	) error {
+		return interceptors[0](ctx, req, reply, info,
+			chainUnaryInterceptors(interceptors[1:], final, info))
+	}
+}
+
 // NewClient creates a new ttrpc client using the given connection
 func NewClient(conn net.Conn, opts ...ClientOpts) *Client {
 	ctx, cancel := context.WithCancel(context.Background())
@@ -85,13 +121,16 @@ func NewClient(conn net.Conn, opts ...ClientOpts) *Client {
 		ctx:             ctx,
 		userCloseFunc:   func() {},
 		userCloseWaitCh: make(chan struct{}),
-		interceptor:     defaultClientInterceptor,
 	}
 
 	for _, o := range opts {
 		o(c)
 	}
 
+	if c.interceptor == nil {
+		c.interceptor = defaultClientInterceptor
+	}
+
 	go c.run()
 	return c
 }
@@ -286,7 +325,7 @@ func (c *Client) Close() error {
 	return nil
 }
 
-// UserOnCloseWait is used to blocks untils the user's on-close callback
+// UserOnCloseWait is used to block until the user's on-close callback
 // finishes.
 func (c *Client) UserOnCloseWait(ctx context.Context) error {
 	select {

vendor/github.com/containerd/ttrpc/config.go

@@ -16,7 +16,10 @@
 
 package ttrpc
 
-import "errors"
+import (
+	"context"
+	"errors"
+)
 
 type serverConfig struct {
 	handshaker  Handshaker
@@ -44,9 +47,40 @@ func WithServerHandshaker(handshaker Handshaker) ServerOpt {
 func WithUnaryServerInterceptor(i UnaryServerInterceptor) ServerOpt {
 	return func(c *serverConfig) error {
 		if c.interceptor != nil {
-			return errors.New("only one interceptor allowed per server")
+			return errors.New("only one unchained interceptor allowed per server")
 		}
 		c.interceptor = i
 		return nil
 	}
 }
+
+// WithChainUnaryServerInterceptor sets the provided chain of server interceptors
+func WithChainUnaryServerInterceptor(interceptors ...UnaryServerInterceptor) ServerOpt {
+	return func(c *serverConfig) error {
+		if len(interceptors) == 0 {
+			return nil
+		}
+		if c.interceptor != nil {
+			interceptors = append([]UnaryServerInterceptor{c.interceptor}, interceptors...)
+		}
+		c.interceptor = func(
+			ctx context.Context,
+			unmarshal Unmarshaler,
+			info *UnaryServerInfo,
+			method Method) (interface{}, error) {
+			return interceptors[0](ctx, unmarshal, info,
+				chainUnaryServerInterceptors(info, method, interceptors[1:]))
+		}
+		return nil
+	}
+}
+
+func chainUnaryServerInterceptors(info *UnaryServerInfo, method Method, interceptors []UnaryServerInterceptor) Method {
+	if len(interceptors) == 0 {
+		return method
+	}
+	return func(ctx context.Context, unmarshal func(interface{}) error) (interface{}, error) {
+		return interceptors[0](ctx, unmarshal, info,
+			chainUnaryServerInterceptors(info, method, interceptors[1:]))
+	}
+}

vendor/github.com/containerd/ttrpc/services.go

@@ -140,7 +140,11 @@ func (s *serviceSet) handle(ctx context.Context, req *Request, respond func(*sta
 			respond(st, p, stream.StreamingServer, true)
 		}()
 
-		if req.Payload != nil {
+		// Empty proto messages serialized to 0 payloads,
+		// so signatures like: rpc Stream(google.protobuf.Empty) returns (stream Data);
+		// don't get invoked here, which causes hang on client side.
+		// See https://github.com/containerd/ttrpc/issues/126
+		if req.Payload != nil || !info.StreamingClient {
 			unmarshal := func(obj interface{}) error {
 				return protoUnmarshal(req.Payload, obj)
 			}