vendor: upgrade grpc-go to v1.6.0

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

cmd/vendor/github.com/golang/protobuf/ptypes/any.go

@@ -0,0 +1,136 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package ptypes
+
+// This file implements functions to marshal proto.Message to/from
+// google.protobuf.Any message.
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/ptypes/any"
+)
+
+const googleApis = "type.googleapis.com/"
+
+// AnyMessageName returns the name of the message contained in a google.protobuf.Any message.
+//
+// Note that regular type assertions should be done using the Is
+// function. AnyMessageName is provided for less common use cases like filtering a
+// sequence of Any messages based on a set of allowed message type names.
+func AnyMessageName(any *any.Any) (string, error) {
+	slash := strings.LastIndex(any.TypeUrl, "/")
+	if slash < 0 {
+		return "", fmt.Errorf("message type url %q is invalid", any.TypeUrl)
+	}
+	return any.TypeUrl[slash+1:], nil
+}
+
+// MarshalAny takes the protocol buffer and encodes it into google.protobuf.Any.
+func MarshalAny(pb proto.Message) (*any.Any, error) {
+	value, err := proto.Marshal(pb)
+	if err != nil {
+		return nil, err
+	}
+	return &any.Any{TypeUrl: googleApis + proto.MessageName(pb), Value: value}, nil
+}
+
+// DynamicAny is a value that can be passed to UnmarshalAny to automatically
+// allocate a proto.Message for the type specified in a google.protobuf.Any
+// message. The allocated message is stored in the embedded proto.Message.
+//
+// Example:
+//
+//   var x ptypes.DynamicAny
+//   if err := ptypes.UnmarshalAny(a, &x); err != nil { ... }
+//   fmt.Printf("unmarshaled message: %v", x.Message)
+type DynamicAny struct {
+	proto.Message
+}
+
+// Empty returns a new proto.Message of the type specified in a
+// google.protobuf.Any message. It returns an error if corresponding message
+// type isn't linked in.
+func Empty(any *any.Any) (proto.Message, error) {
+	aname, err := AnyMessageName(any)
+	if err != nil {
+		return nil, err
+	}
+
+	t := proto.MessageType(aname)
+	if t == nil {
+		return nil, fmt.Errorf("any: message type %q isn't linked in", aname)
+	}
+	return reflect.New(t.Elem()).Interface().(proto.Message), nil
+}
+
+// UnmarshalAny parses the protocol buffer representation in a google.protobuf.Any
+// message and places the decoded result in pb. It returns an error if type of
+// contents of Any message does not match type of pb message.
+//
+// pb can be a proto.Message, or a *DynamicAny.
+func UnmarshalAny(any *any.Any, pb proto.Message) error {
+	if d, ok := pb.(*DynamicAny); ok {
+		if d.Message == nil {
+			var err error
+			d.Message, err = Empty(any)
+			if err != nil {
+				return err
+			}
+		}
+		return UnmarshalAny(any, d.Message)
+	}
+
+	aname, err := AnyMessageName(any)
+	if err != nil {
+		return err
+	}
+
+	mname := proto.MessageName(pb)
+	if aname != mname {
+		return fmt.Errorf("mismatched message type: got %q want %q", aname, mname)
+	}
+	return proto.Unmarshal(any.Value, pb)
+}
+
+// Is returns true if any value contains a given message type.
+func Is(any *any.Any, pb proto.Message) bool {
+	aname, err := AnyMessageName(any)
+	if err != nil {
+		return false
+	}
+
+	return aname == proto.MessageName(pb)
+}

cmd/vendor/github.com/golang/protobuf/ptypes/doc.go

@@ -0,0 +1,35 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/*
+Package ptypes contains code for interacting with well-known types.
+*/
+package ptypes

cmd/vendor/github.com/golang/protobuf/ptypes/duration.go

@@ -0,0 +1,102 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package ptypes
+
+// This file implements conversions between google.protobuf.Duration
+// and time.Duration.
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	durpb "github.com/golang/protobuf/ptypes/duration"
+)
+
+const (
+	// Range of a durpb.Duration in seconds, as specified in
+	// google/protobuf/duration.proto. This is about 10,000 years in seconds.
+	maxSeconds = int64(10000 * 365.25 * 24 * 60 * 60)
+	minSeconds = -maxSeconds
+)
+
+// validateDuration determines whether the durpb.Duration is valid according to the
+// definition in google/protobuf/duration.proto. A valid durpb.Duration
+// may still be too large to fit into a time.Duration (the range of durpb.Duration
+// is about 10,000 years, and the range of time.Duration is about 290).
+func validateDuration(d *durpb.Duration) error {
+	if d == nil {
+		return errors.New("duration: nil Duration")
+	}
+	if d.Seconds < minSeconds || d.Seconds > maxSeconds {
+		return fmt.Errorf("duration: %v: seconds out of range", d)
+	}
+	if d.Nanos <= -1e9 || d.Nanos >= 1e9 {
+		return fmt.Errorf("duration: %v: nanos out of range", d)
+	}
+	// Seconds and Nanos must have the same sign, unless d.Nanos is zero.
+	if (d.Seconds < 0 && d.Nanos > 0) || (d.Seconds > 0 && d.Nanos < 0) {
+		return fmt.Errorf("duration: %v: seconds and nanos have different signs", d)
+	}
+	return nil
+}
+
+// Duration converts a durpb.Duration to a time.Duration. Duration
+// returns an error if the durpb.Duration is invalid or is too large to be
+// represented in a time.Duration.
+func Duration(p *durpb.Duration) (time.Duration, error) {
+	if err := validateDuration(p); err != nil {
+		return 0, err
+	}
+	d := time.Duration(p.Seconds) * time.Second
+	if int64(d/time.Second) != p.Seconds {
+		return 0, fmt.Errorf("duration: %v is out of range for time.Duration", p)
+	}
+	if p.Nanos != 0 {
+		d += time.Duration(p.Nanos)
+		if (d < 0) != (p.Nanos < 0) {
+			return 0, fmt.Errorf("duration: %v is out of range for time.Duration", p)
+		}
+	}
+	return d, nil
+}
+
+// DurationProto converts a time.Duration to a durpb.Duration.
+func DurationProto(d time.Duration) *durpb.Duration {
+	nanos := d.Nanoseconds()
+	secs := nanos / 1e9
+	nanos -= secs * 1e9
+	return &durpb.Duration{
+		Seconds: secs,
+		Nanos:   int32(nanos),
+	}
+}

cmd/vendor/github.com/golang/protobuf/ptypes/duration/duration.pb.go

@@ -0,0 +1,146 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: github.com/golang/protobuf/ptypes/duration/duration.proto
+
+/*
+Package duration is a generated protocol buffer package.
+
+It is generated from these files:
+	github.com/golang/protobuf/ptypes/duration/duration.proto
+
+It has these top-level messages:
+	Duration
+*/
+package duration
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// A Duration represents a signed, fixed-length span of time represented
+// as a count of seconds and fractions of seconds at nanosecond
+// resolution. It is independent of any calendar and concepts like "day"
+// or "month". It is related to Timestamp in that the difference between
+// two Timestamp values is a Duration and it can be added or subtracted
+// from a Timestamp. Range is approximately +-10,000 years.
+//
+// # Examples
+//
+// Example 1: Compute Duration from two Timestamps in pseudo code.
+//
+//     Timestamp start = ...;
+//     Timestamp end = ...;
+//     Duration duration = ...;
+//
+//     duration.seconds = end.seconds - start.seconds;
+//     duration.nanos = end.nanos - start.nanos;
+//
+//     if (duration.seconds < 0 && duration.nanos > 0) {
+//       duration.seconds += 1;
+//       duration.nanos -= 1000000000;
+//     } else if (durations.seconds > 0 && duration.nanos < 0) {
+//       duration.seconds -= 1;
+//       duration.nanos += 1000000000;
+//     }
+//
+// Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.
+//
+//     Timestamp start = ...;
+//     Duration duration = ...;
+//     Timestamp end = ...;
+//
+//     end.seconds = start.seconds + duration.seconds;
+//     end.nanos = start.nanos + duration.nanos;
+//
+//     if (end.nanos < 0) {
+//       end.seconds -= 1;
+//       end.nanos += 1000000000;
+//     } else if (end.nanos >= 1000000000) {
+//       end.seconds += 1;
+//       end.nanos -= 1000000000;
+//     }
+//
+// Example 3: Compute Duration from datetime.timedelta in Python.
+//
+//     td = datetime.timedelta(days=3, minutes=10)
+//     duration = Duration()
+//     duration.FromTimedelta(td)
+//
+// # JSON Mapping
+//
+// In JSON format, the Duration type is encoded as a string rather than an
+// object, where the string ends in the suffix "s" (indicating seconds) and
+// is preceded by the number of seconds, with nanoseconds expressed as
+// fractional seconds. For example, 3 seconds with 0 nanoseconds should be
+// encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
+// be expressed in JSON format as "3.000000001s", and 3 seconds and 1
+// microsecond should be expressed in JSON format as "3.000001s".
+//
+//
+type Duration struct {
+	// Signed seconds of the span of time. Must be from -315,576,000,000
+	// to +315,576,000,000 inclusive. Note: these bounds are computed from:
+	// 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
+	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
+	// Signed fractions of a second at nanosecond resolution of the span
+	// of time. Durations less than one second are represented with a 0
+	// `seconds` field and a positive or negative `nanos` field. For durations
+	// of one second or more, a non-zero value for the `nanos` field must be
+	// of the same sign as the `seconds` field. Must be from -999,999,999
+	// to +999,999,999 inclusive.
+	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+}
+
+func (m *Duration) Reset()                    { *m = Duration{} }
+func (m *Duration) String() string            { return proto.CompactTextString(m) }
+func (*Duration) ProtoMessage()               {}
+func (*Duration) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+func (*Duration) XXX_WellKnownType() string   { return "Duration" }
+
+func (m *Duration) GetSeconds() int64 {
+	if m != nil {
+		return m.Seconds
+	}
+	return 0
+}
+
+func (m *Duration) GetNanos() int32 {
+	if m != nil {
+		return m.Nanos
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*Duration)(nil), "google.protobuf.Duration")
+}
+
+func init() {
+	proto.RegisterFile("github.com/golang/protobuf/ptypes/duration/duration.proto", fileDescriptor0)
+}
+
+var fileDescriptor0 = []byte{
+	// 189 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xb2, 0x4c, 0xcf, 0x2c, 0xc9,
+	0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5, 0x4f, 0xcf, 0xcf, 0x49, 0xcc, 0x4b, 0xd7, 0x2f, 0x28,
+	0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x2f, 0x28, 0xa9, 0x2c, 0x48, 0x2d, 0xd6, 0x4f, 0x29,
+	0x2d, 0x4a, 0x2c, 0xc9, 0xcc, 0xcf, 0x83, 0x33, 0xf4, 0xc0, 0x2a, 0x84, 0xf8, 0xd3, 0xf3, 0xf3,
+	0xd3, 0x73, 0x52, 0xf5, 0x60, 0xea, 0x95, 0xac, 0xb8, 0x38, 0x5c, 0xa0, 0x4a, 0x84, 0x24, 0xb8,
+	0xd8, 0x8b, 0x53, 0x93, 0xf3, 0xf3, 0x52, 0x8a, 0x25, 0x18, 0x15, 0x18, 0x35, 0x98, 0x83, 0x60,
+	0x5c, 0x21, 0x11, 0x2e, 0xd6, 0xbc, 0xc4, 0xbc, 0xfc, 0x62, 0x09, 0x26, 0x05, 0x46, 0x0d, 0xd6,
+	0x20, 0x08, 0xc7, 0xa9, 0x86, 0x4b, 0x38, 0x39, 0x3f, 0x57, 0x0f, 0xcd, 0x48, 0x27, 0x5e, 0x98,
+	0x81, 0x01, 0x20, 0x91, 0x00, 0xc6, 0x28, 0x2d, 0xe2, 0xdd, 0xfb, 0x83, 0x91, 0x71, 0x11, 0x13,
+	0xb3, 0x7b, 0x80, 0xd3, 0x2a, 0x26, 0x39, 0x77, 0x88, 0xb9, 0x01, 0x50, 0xa5, 0x7a, 0xe1, 0xa9,
+	0x39, 0x39, 0xde, 0x79, 0xf9, 0xe5, 0x79, 0x21, 0x20, 0x2d, 0x49, 0x6c, 0x60, 0x33, 0x8c, 0x01,
+	0x01, 0x00, 0x00, 0xff, 0xff, 0x45, 0x5a, 0x81, 0x3d, 0x0e, 0x01, 0x00, 0x00,
+}

cmd/vendor/github.com/golang/protobuf/ptypes/timestamp.go

@@ -0,0 +1,125 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package ptypes
+
+// This file implements operations on google.protobuf.Timestamp.
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	tspb "github.com/golang/protobuf/ptypes/timestamp"
+)
+
+const (
+	// Seconds field of the earliest valid Timestamp.
+	// This is time.Date(1, 1, 1, 0, 0, 0, 0, time.UTC).Unix().
+	minValidSeconds = -62135596800
+	// Seconds field just after the latest valid Timestamp.
+	// This is time.Date(10000, 1, 1, 0, 0, 0, 0, time.UTC).Unix().
+	maxValidSeconds = 253402300800
+)
+
+// validateTimestamp determines whether a Timestamp is valid.
+// A valid timestamp represents a time in the range
+// [0001-01-01, 10000-01-01) and has a Nanos field
+// in the range [0, 1e9).
+//
+// If the Timestamp is valid, validateTimestamp returns nil.
+// Otherwise, it returns an error that describes
+// the problem.
+//
+// Every valid Timestamp can be represented by a time.Time, but the converse is not true.
+func validateTimestamp(ts *tspb.Timestamp) error {
+	if ts == nil {
+		return errors.New("timestamp: nil Timestamp")
+	}
+	if ts.Seconds < minValidSeconds {
+		return fmt.Errorf("timestamp: %v before 0001-01-01", ts)
+	}
+	if ts.Seconds >= maxValidSeconds {
+		return fmt.Errorf("timestamp: %v after 10000-01-01", ts)
+	}
+	if ts.Nanos < 0 || ts.Nanos >= 1e9 {
+		return fmt.Errorf("timestamp: %v: nanos not in range [0, 1e9)", ts)
+	}
+	return nil
+}
+
+// Timestamp converts a google.protobuf.Timestamp proto to a time.Time.
+// It returns an error if the argument is invalid.
+//
+// Unlike most Go functions, if Timestamp returns an error, the first return value
+// is not the zero time.Time. Instead, it is the value obtained from the
+// time.Unix function when passed the contents of the Timestamp, in the UTC
+// locale. This may or may not be a meaningful time; many invalid Timestamps
+// do map to valid time.Times.
+//
+// A nil Timestamp returns an error. The first return value in that case is
+// undefined.
+func Timestamp(ts *tspb.Timestamp) (time.Time, error) {
+	// Don't return the zero value on error, because corresponds to a valid
+	// timestamp. Instead return whatever time.Unix gives us.
+	var t time.Time
+	if ts == nil {
+		t = time.Unix(0, 0).UTC() // treat nil like the empty Timestamp
+	} else {
+		t = time.Unix(ts.Seconds, int64(ts.Nanos)).UTC()
+	}
+	return t, validateTimestamp(ts)
+}
+
+// TimestampProto converts the time.Time to a google.protobuf.Timestamp proto.
+// It returns an error if the resulting Timestamp is invalid.
+func TimestampProto(t time.Time) (*tspb.Timestamp, error) {
+	seconds := t.Unix()
+	nanos := int32(t.Sub(time.Unix(seconds, 0)))
+	ts := &tspb.Timestamp{
+		Seconds: seconds,
+		Nanos:   nanos,
+	}
+	if err := validateTimestamp(ts); err != nil {
+		return nil, err
+	}
+	return ts, nil
+}
+
+// TimestampString returns the RFC 3339 string for valid Timestamps. For invalid
+// Timestamps, it returns an error message in parentheses.
+func TimestampString(ts *tspb.Timestamp) string {
+	t, err := Timestamp(ts)
+	if err != nil {
+		return fmt.Sprintf("(%v)", err)
+	}
+	return t.Format(time.RFC3339Nano)
+}

cmd/vendor/github.com/golang/protobuf/ptypes/timestamp/timestamp.pb.go

@@ -0,0 +1,162 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: github.com/golang/protobuf/ptypes/timestamp/timestamp.proto
+
+/*
+Package timestamp is a generated protocol buffer package.
+
+It is generated from these files:
+	github.com/golang/protobuf/ptypes/timestamp/timestamp.proto
+
+It has these top-level messages:
+	Timestamp
+*/
+package timestamp
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// A Timestamp represents a point in time independent of any time zone
+// or calendar, represented as seconds and fractions of seconds at
+// nanosecond resolution in UTC Epoch time. It is encoded using the
+// Proleptic Gregorian Calendar which extends the Gregorian calendar
+// backwards to year one. It is encoded assuming all minutes are 60
+// seconds long, i.e. leap seconds are "smeared" so that no leap second
+// table is needed for interpretation. Range is from
+// 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z.
+// By restricting to that range, we ensure that we can convert to
+// and from  RFC 3339 date strings.
+// See [https://www.ietf.org/rfc/rfc3339.txt](https://www.ietf.org/rfc/rfc3339.txt).
+//
+// # Examples
+//
+// Example 1: Compute Timestamp from POSIX `time()`.
+//
+//     Timestamp timestamp;
+//     timestamp.set_seconds(time(NULL));
+//     timestamp.set_nanos(0);
+//
+// Example 2: Compute Timestamp from POSIX `gettimeofday()`.
+//
+//     struct timeval tv;
+//     gettimeofday(&tv, NULL);
+//
+//     Timestamp timestamp;
+//     timestamp.set_seconds(tv.tv_sec);
+//     timestamp.set_nanos(tv.tv_usec * 1000);
+//
+// Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
+//
+//     FILETIME ft;
+//     GetSystemTimeAsFileTime(&ft);
+//     UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
+//
+//     // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
+//     // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
+//     Timestamp timestamp;
+//     timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
+//     timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
+//
+// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
+//
+//     long millis = System.currentTimeMillis();
+//
+//     Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
+//         .setNanos((int) ((millis % 1000) * 1000000)).build();
+//
+//
+// Example 5: Compute Timestamp from current time in Python.
+//
+//     timestamp = Timestamp()
+//     timestamp.GetCurrentTime()
+//
+// # JSON Mapping
+//
+// In JSON format, the Timestamp type is encoded as a string in the
+// [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
+// format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
+// where {year} is always expressed using four digits while {month}, {day},
+// {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
+// seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
+// are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
+// is required, though only UTC (as indicated by "Z") is presently supported.
+//
+// For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
+// 01:30 UTC on January 15, 2017.
+//
+// In JavaScript, one can convert a Date object to this format using the
+// standard [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString]
+// method. In Python, a standard `datetime.datetime` object can be converted
+// to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
+// with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one
+// can use the Joda Time's [`ISODateTimeFormat.dateTime()`](
+// http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime())
+// to obtain a formatter capable of generating timestamps in this format.
+//
+//
+type Timestamp struct {
+	// Represents seconds of UTC time since Unix epoch
+	// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+	// 9999-12-31T23:59:59Z inclusive.
+	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
+	// Non-negative fractions of a second at nanosecond resolution. Negative
+	// second values with fractions must still have non-negative nanos values
+	// that count forward in time. Must be from 0 to 999,999,999
+	// inclusive.
+	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+}
+
+func (m *Timestamp) Reset()                    { *m = Timestamp{} }
+func (m *Timestamp) String() string            { return proto.CompactTextString(m) }
+func (*Timestamp) ProtoMessage()               {}
+func (*Timestamp) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+func (*Timestamp) XXX_WellKnownType() string   { return "Timestamp" }
+
+func (m *Timestamp) GetSeconds() int64 {
+	if m != nil {
+		return m.Seconds
+	}
+	return 0
+}
+
+func (m *Timestamp) GetNanos() int32 {
+	if m != nil {
+		return m.Nanos
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*Timestamp)(nil), "google.protobuf.Timestamp")
+}
+
+func init() {
+	proto.RegisterFile("github.com/golang/protobuf/ptypes/timestamp/timestamp.proto", fileDescriptor0)
+}
+
+var fileDescriptor0 = []byte{
+	// 190 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xb2, 0x4e, 0xcf, 0x2c, 0xc9,
+	0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5, 0x4f, 0xcf, 0xcf, 0x49, 0xcc, 0x4b, 0xd7, 0x2f, 0x28,
+	0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x2f, 0x28, 0xa9, 0x2c, 0x48, 0x2d, 0xd6, 0x2f, 0xc9,
+	0xcc, 0x4d, 0x2d, 0x2e, 0x49, 0xcc, 0x2d, 0x40, 0xb0, 0xf4, 0xc0, 0x6a, 0x84, 0xf8, 0xd3, 0xf3,
+	0xf3, 0xd3, 0x73, 0x52, 0xf5, 0x60, 0x3a, 0x94, 0xac, 0xb9, 0x38, 0x43, 0x60, 0x6a, 0x84, 0x24,
+	0xb8, 0xd8, 0x8b, 0x53, 0x93, 0xf3, 0xf3, 0x52, 0x8a, 0x25, 0x18, 0x15, 0x18, 0x35, 0x98, 0x83,
+	0x60, 0x5c, 0x21, 0x11, 0x2e, 0xd6, 0xbc, 0xc4, 0xbc, 0xfc, 0x62, 0x09, 0x26, 0x05, 0x46, 0x0d,
+	0xd6, 0x20, 0x08, 0xc7, 0xa9, 0x8e, 0x4b, 0x38, 0x39, 0x3f, 0x57, 0x0f, 0xcd, 0x4c, 0x27, 0x3e,
+	0xb8, 0x89, 0x01, 0x20, 0xa1, 0x00, 0xc6, 0x28, 0x6d, 0x12, 0xdc, 0xfc, 0x83, 0x91, 0x71, 0x11,
+	0x13, 0xb3, 0x7b, 0x80, 0xd3, 0x2a, 0x26, 0x39, 0x77, 0x88, 0xc9, 0x01, 0x50, 0xb5, 0x7a, 0xe1,
+	0xa9, 0x39, 0x39, 0xde, 0x79, 0xf9, 0xe5, 0x79, 0x21, 0x20, 0x3d, 0x49, 0x6c, 0x60, 0x43, 0x8c,
+	0x01, 0x01, 0x00, 0x00, 0xff, 0xff, 0x6b, 0x59, 0x0a, 0x4d, 0x13, 0x01, 0x00, 0x00,
+}

cmd/vendor/google.golang.org/grpc/balancer.go

@@ -395,3 +395,14 @@ func (rr *roundRobin) Close() error {
 	}
 	return nil
 }
+
+// pickFirst is used to test multi-addresses in one addrConn in which all addresses share the same addrConn.
+// It is a wrapper around roundRobin balancer. The logic of all methods works fine because balancer.Get()
+// returns the only address Up by resetTransport().
+type pickFirst struct {
+	*roundRobin
+}
+
+func pickFirstBalancer(r naming.Resolver) Balancer {
+	return &pickFirst{&roundRobin{r: r}}
+}

cmd/vendor/google.golang.org/grpc/call.go

@@ -74,9 +74,6 @@ func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTran
 		dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
 	}
 	c.trailerMD = stream.Trailer()
-	if peer, ok := peer.FromContext(stream.Context()); ok {
-		c.peer = peer
-	}
 	return nil
 }
 
@@ -102,17 +99,17 @@ func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor,
 			Client: true,
 		}
 	}
-	outBuf, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
+	hdr, data, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
 	if err != nil {
 		return err
 	}
 	if c.maxSendMessageSize == nil {
 		return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
 	}
-	if len(outBuf) > *c.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(outBuf), *c.maxSendMessageSize)
+	if len(data) > *c.maxSendMessageSize {
+		return Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(data), *c.maxSendMessageSize)
 	}
-	err = t.Write(stream, outBuf, opts)
+	err = t.Write(stream, hdr, data, opts)
 	if err == nil && outPayload != nil {
 		outPayload.SentTime = time.Now()
 		dopts.copts.StatsHandler.HandleRPC(ctx, outPayload)
@@ -262,6 +259,9 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
 			}
 			return toRPCErr(err)
 		}
+		if peer, ok := peer.FromContext(stream.Context()); ok {
+			c.peer = peer
+		}
 		err = sendRequest(ctx, cc.dopts, cc.dopts.cp, &c, callHdr, stream, t, args, topts)
 		if err != nil {
 			if put != nil {

cmd/vendor/google.golang.org/grpc/clientconn.go

@@ -20,7 +20,7 @@ package grpc
 
 import (
 	"errors"
-	"fmt"
+	"math"
 	"net"
 	"strings"
 	"sync"
@@ -28,6 +28,7 @@ import (
 
 	"golang.org/x/net/context"
 	"golang.org/x/net/trace"
+	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/keepalive"
@@ -89,7 +90,7 @@ type dialOptions struct {
 
 const (
 	defaultClientMaxReceiveMessageSize = 1024 * 1024 * 4
-	defaultClientMaxSendMessageSize    = 1024 * 1024 * 4
+	defaultClientMaxSendMessageSize    = math.MaxInt32
 )
 
 // DialOption configures how we set up the connection.
@@ -312,8 +313,10 @@ func Dial(target string, opts ...DialOption) (*ClientConn, error) {
 func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) {
 	cc := &ClientConn{
 		target: target,
+		csMgr:  &connectivityStateManager{},
 		conns:  make(map[Address]*addrConn),
 	}
+	cc.csEvltr = &connectivityStateEvaluator{csMgr: cc.csMgr}
 	cc.ctx, cc.cancel = context.WithCancel(context.Background())
 
 	for _, opt := range opts {
@@ -412,7 +415,7 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
 			}
 		}
 		// No balancer, or no resolver within the balancer.  Connect directly.
-		if err := cc.resetAddrConn(Address{Addr: target}, cc.dopts.block, nil); err != nil {
+		if err := cc.resetAddrConn([]Address{{Addr: target}}, cc.dopts.block, nil); err != nil {
 			waitC <- err
 			return
 		}
@@ -443,37 +446,95 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
 	return cc, nil
 }
 
-// ConnectivityState indicates the state of a client connection.
-type ConnectivityState int
+// connectivityStateEvaluator gets updated by addrConns when their
+// states transition, based on which it evaluates the state of
+// ClientConn.
+// Note: This code will eventually sit in the balancer in the new design.
+type connectivityStateEvaluator struct {
+	csMgr               *connectivityStateManager
+	mu                  sync.Mutex
+	numReady            uint64 // Number of addrConns in ready state.
+	numConnecting       uint64 // Number of addrConns in connecting state.
+	numTransientFailure uint64 // Number of addrConns in transientFailure.
+}
 
-const (
-	// Idle indicates the ClientConn is idle.
-	Idle ConnectivityState = iota
-	// Connecting indicates the ClienConn is connecting.
-	Connecting
-	// Ready indicates the ClientConn is ready for work.
-	Ready
-	// TransientFailure indicates the ClientConn has seen a failure but expects to recover.
-	TransientFailure
-	// Shutdown indicates the ClientConn has started shutting down.
-	Shutdown
-)
+// recordTransition records state change happening in every addrConn and based on
+// that it evaluates what state the ClientConn is in.
+// It can only transition between connectivity.Ready, connectivity.Connecting and connectivity.TransientFailure. Other states,
+// Idle and connectivity.Shutdown are transitioned into by ClientConn; in the begining of the connection
+// before any addrConn is created ClientConn is in idle state. In the end when ClientConn
+// closes it is in connectivity.Shutdown state.
+// TODO Note that in later releases, a ClientConn with no activity will be put into an Idle state.
+func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) {
+	cse.mu.Lock()
+	defer cse.mu.Unlock()
+
+	// Update counters.
+	for idx, state := range []connectivity.State{oldState, newState} {
+		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
+		switch state {
+		case connectivity.Ready:
+			cse.numReady += updateVal
+		case connectivity.Connecting:
+			cse.numConnecting += updateVal
+		case connectivity.TransientFailure:
+			cse.numTransientFailure += updateVal
+		}
+	}
+
+	// Evaluate.
+	if cse.numReady > 0 {
+		cse.csMgr.updateState(connectivity.Ready)
+		return
+	}
+	if cse.numConnecting > 0 {
+		cse.csMgr.updateState(connectivity.Connecting)
+		return
+	}
+	cse.csMgr.updateState(connectivity.TransientFailure)
+}
+
+// connectivityStateManager keeps the connectivity.State of ClientConn.
+// This struct will eventually be exported so the balancers can access it.
+type connectivityStateManager struct {
+	mu         sync.Mutex
+	state      connectivity.State
+	notifyChan chan struct{}
+}
+
+// updateState updates the connectivity.State of ClientConn.
+// If there's a change it notifies goroutines waiting on state change to
+// happen.
+func (csm *connectivityStateManager) updateState(state connectivity.State) {
+	csm.mu.Lock()
+	defer csm.mu.Unlock()
+	if csm.state == connectivity.Shutdown {
+		return
+	}
+	if csm.state == state {
+		return
+	}
+	csm.state = state
+	if csm.notifyChan != nil {
+		// There are other goroutines waiting on this channel.
+		close(csm.notifyChan)
+		csm.notifyChan = nil
+	}
+}
+
+func (csm *connectivityStateManager) getState() connectivity.State {
+	csm.mu.Lock()
+	defer csm.mu.Unlock()
+	return csm.state
+}
 
-func (s ConnectivityState) String() string {
-	switch s {
-	case Idle:
-		return "IDLE"
-	case Connecting:
-		return "CONNECTING"
-	case Ready:
-		return "READY"
-	case TransientFailure:
-		return "TRANSIENT_FAILURE"
-	case Shutdown:
-		return "SHUTDOWN"
-	default:
-		panic(fmt.Sprintf("unknown connectivity state: %d", s))
+func (csm *connectivityStateManager) getNotifyChan() <-chan struct{} {
+	csm.mu.Lock()
+	defer csm.mu.Unlock()
+	if csm.notifyChan == nil {
+		csm.notifyChan = make(chan struct{})
 	}
+	return csm.notifyChan
 }
 
 // ClientConn represents a client connection to an RPC server.
@@ -484,6 +545,8 @@ type ClientConn struct {
 	target    string
 	authority string
 	dopts     dialOptions
+	csMgr     *connectivityStateManager
+	csEvltr   *connectivityStateEvaluator // This will eventually be part of balancer.
 
 	mu    sync.RWMutex
 	sc    ServiceConfig
@@ -492,48 +555,102 @@ type ClientConn struct {
 	mkp keepalive.ClientParameters
 }
 
+// WaitForStateChange waits until the connectivity.State of ClientConn changes from sourceState or
+// ctx expires. A true value is returned in former case and false in latter.
+// This is an EXPERIMENTAL API.
+func (cc *ClientConn) WaitForStateChange(ctx context.Context, sourceState connectivity.State) bool {
+	ch := cc.csMgr.getNotifyChan()
+	if cc.csMgr.getState() != sourceState {
+		return true
+	}
+	select {
+	case <-ctx.Done():
+		return false
+	case <-ch:
+		return true
+	}
+}
+
+// GetState returns the connectivity.State of ClientConn.
+// This is an EXPERIMENTAL API.
+func (cc *ClientConn) GetState() connectivity.State {
+	return cc.csMgr.getState()
+}
+
 // lbWatcher watches the Notify channel of the balancer in cc and manages
 // connections accordingly.  If doneChan is not nil, it is closed after the
 // first successfull connection is made.
 func (cc *ClientConn) lbWatcher(doneChan chan struct{}) {
+	defer func() {
+		// In case channel from cc.dopts.balancer.Notify() gets closed before a
+		// successful connection gets established, don't forget to notify the
+		// caller.
+		if doneChan != nil {
+			close(doneChan)
+		}
+	}()
+
+	_, isPickFirst := cc.dopts.balancer.(*pickFirst)
 	for addrs := range cc.dopts.balancer.Notify() {
-		var (
-			add []Address   // Addresses need to setup connections.
-			del []*addrConn // Connections need to tear down.
-		)
-		cc.mu.Lock()
-		for _, a := range addrs {
-			if _, ok := cc.conns[a]; !ok {
-				add = append(add, a)
+		if isPickFirst {
+			if len(addrs) == 0 {
+				// No address can be connected, should teardown current addrconn if exists
+				cc.mu.Lock()
+				if len(cc.conns) != 0 {
+					cc.pickFirstAddrConnTearDown()
+				}
+				cc.mu.Unlock()
+			} else {
+				cc.resetAddrConn(addrs, true, nil)
+				if doneChan != nil {
+					close(doneChan)
+					doneChan = nil
+				}
 			}
-		}
-		for k, c := range cc.conns {
-			var keep bool
+		} else {
+			// Not pickFirst, create a new addrConn for each address.
+			var (
+				add []Address   // Addresses need to setup connections.
+				del []*addrConn // Connections need to tear down.
+			)
+			cc.mu.Lock()
 			for _, a := range addrs {
-				if k == a {
-					keep = true
-					break
+				if _, ok := cc.conns[a]; !ok {
+					add = append(add, a)
 				}
 			}
-			if !keep {
-				del = append(del, c)
-				delete(cc.conns, c.addr)
+			for k, c := range cc.conns {
+				var keep bool
+				for _, a := range addrs {
+					if k == a {
+						keep = true
+						break
+					}
+				}
+				if !keep {
+					del = append(del, c)
+					delete(cc.conns, k)
+				}
 			}
-		}
-		cc.mu.Unlock()
-		for _, a := range add {
-			if doneChan != nil {
-				err := cc.resetAddrConn(a, true, nil)
-				if err == nil {
-					close(doneChan)
-					doneChan = nil
+			cc.mu.Unlock()
+			for _, a := range add {
+				var err error
+				if doneChan != nil {
+					err = cc.resetAddrConn([]Address{a}, true, nil)
+					if err == nil {
+						close(doneChan)
+						doneChan = nil
+					}
+				} else {
+					err = cc.resetAddrConn([]Address{a}, false, nil)
+				}
+				if err != nil {
+					grpclog.Warningf("Error creating connection to %v. Err: %v", a, err)
 				}
-			} else {
-				cc.resetAddrConn(a, false, nil)
 			}
-		}
-		for _, c := range del {
-			c.tearDown(errConnDrain)
+			for _, c := range del {
+				c.tearDown(errConnDrain)
+			}
 		}
 	}
 }
@@ -556,6 +673,50 @@ func (cc *ClientConn) scWatcher() {
 	}
 }
 
+// pickFirstUpdateAddresses checks whether current address in the updating list, Update the list if true.
+// It is only used when the balancer is pick first.
+func (cc *ClientConn) pickFirstUpdateAddresses(addrs []Address) bool {
+	if len(cc.conns) == 0 {
+		// No addrconn. Should go resetting addrconn.
+		return false
+	}
+	var currentAc *addrConn
+	for _, currentAc = range cc.conns {
+		break
+	}
+	var addrInNewSlice bool
+	for _, addr := range addrs {
+		if strings.Compare(addr.Addr, currentAc.curAddr.Addr) == 0 {
+			addrInNewSlice = true
+			break
+		}
+	}
+	if addrInNewSlice {
+		cc.conns = make(map[Address]*addrConn)
+		for _, addr := range addrs {
+			cc.conns[addr] = currentAc
+		}
+		currentAc.addrs = addrs
+		return true
+	}
+	return false
+}
+
+// pickFirstAddrConnTearDown() should be called after lock.
+func (cc *ClientConn) pickFirstAddrConnTearDown() {
+	if len(cc.conns) == 0 {
+		return
+	}
+	var currentAc *addrConn
+	for _, currentAc = range cc.conns {
+		break
+	}
+	for k := range cc.conns {
+		delete(cc.conns, k)
+	}
+	currentAc.tearDown(errConnDrain)
+}
+
 // resetAddrConn creates an addrConn for addr and adds it to cc.conns.
 // If there is an old addrConn for addr, it will be torn down, using tearDownErr as the reason.
 // If tearDownErr is nil, errConnDrain will be used instead.
@@ -563,16 +724,30 @@ func (cc *ClientConn) scWatcher() {
 // We should never need to replace an addrConn with a new one. This function is only used
 // as newAddrConn to create new addrConn.
 // TODO rename this function and clean up the code.
-func (cc *ClientConn) resetAddrConn(addr Address, block bool, tearDownErr error) error {
+func (cc *ClientConn) resetAddrConn(addrs []Address, block bool, tearDownErr error) error {
+	// if current transport in addrs, just change lists to update order and new addresses
+	// not work for roundrobin
+	cc.mu.Lock()
+	if _, isPickFirst := cc.dopts.balancer.(*pickFirst); isPickFirst {
+		// If Current address in use in the updating list, just update the list.
+		// Otherwise, teardown current addrconn and create a new one.
+		if cc.pickFirstUpdateAddresses(addrs) {
+			cc.mu.Unlock()
+			return nil
+		}
+		cc.pickFirstAddrConnTearDown()
+	}
+	cc.mu.Unlock()
+
 	ac := &addrConn{
 		cc:    cc,
-		addr:  addr,
+		addrs: addrs,
 		dopts: cc.dopts,
 	}
 	ac.ctx, ac.cancel = context.WithCancel(cc.ctx)
-	ac.stateCV = sync.NewCond(&ac.mu)
+	ac.csEvltr = cc.csEvltr
 	if EnableTracing {
-		ac.events = trace.NewEventLog("grpc.ClientConn", ac.addr.Addr)
+		ac.events = trace.NewEventLog("grpc.ClientConn", ac.addrs[0].Addr)
 	}
 	if !ac.dopts.insecure {
 		if ac.dopts.copts.TransportCredentials == nil {
@@ -594,8 +769,10 @@ func (cc *ClientConn) resetAddrConn(addr Address, block bool, tearDownErr error)
 		cc.mu.Unlock()
 		return ErrClientConnClosing
 	}
-	stale := cc.conns[ac.addr]
-	cc.conns[ac.addr] = ac
+	stale := cc.conns[ac.addrs[0]]
+	for _, a := range ac.addrs {
+		cc.conns[a] = ac
+	}
 	cc.mu.Unlock()
 	if stale != nil {
 		// There is an addrConn alive on ac.addr already. This could be due to
@@ -615,7 +792,7 @@ func (cc *ClientConn) resetAddrConn(addr Address, block bool, tearDownErr error)
 			if err != errConnClosing {
 				// Tear down ac and delete it from cc.conns.
 				cc.mu.Lock()
-				delete(cc.conns, ac.addr)
+				delete(cc.conns, ac.addrs[0])
 				cc.mu.Unlock()
 				ac.tearDown(err)
 			}
@@ -630,7 +807,7 @@ func (cc *ClientConn) resetAddrConn(addr Address, block bool, tearDownErr error)
 		// Start a goroutine connecting to the server asynchronously.
 		go func() {
 			if err := ac.resetTransport(false); err != nil {
-				grpclog.Warningf("Failed to dial %s: %v; please retry.", ac.addr.Addr, err)
+				grpclog.Warningf("Failed to dial %s: %v; please retry.", ac.addrs[0].Addr, err)
 				if err != errConnClosing {
 					// Keep this ac in cc.conns, to get the reason it's torn down.
 					ac.tearDown(err)
@@ -727,6 +904,7 @@ func (cc *ClientConn) Close() error {
 	}
 	conns := cc.conns
 	cc.conns = nil
+	cc.csMgr.updateState(connectivity.Shutdown)
 	cc.mu.Unlock()
 	if cc.dopts.balancer != nil {
 		cc.dopts.balancer.Close()
@@ -742,15 +920,17 @@ type addrConn struct {
 	ctx    context.Context
 	cancel context.CancelFunc
 
-	cc     *ClientConn
-	addr   Address
-	dopts  dialOptions
-	events trace.EventLog
+	cc      *ClientConn
+	curAddr Address
+	addrs   []Address
+	dopts   dialOptions
+	events  trace.EventLog
+
+	csEvltr *connectivityStateEvaluator
 
-	mu      sync.Mutex
-	state   ConnectivityState
-	stateCV *sync.Cond
-	down    func(error) // the handler called when a connection is down.
+	mu    sync.Mutex
+	state connectivity.State
+	down  func(error) // the handler called when a connection is down.
 	// ready is closed and becomes nil when a new transport is up or failed
 	// due to timeout.
 	ready     chan struct{}
@@ -790,49 +970,13 @@ func (ac *addrConn) errorf(format string, a ...interface{}) {
 	}
 }
 
-// getState returns the connectivity state of the Conn
-func (ac *addrConn) getState() ConnectivityState {
-	ac.mu.Lock()
-	defer ac.mu.Unlock()
-	return ac.state
-}
-
-// waitForStateChange blocks until the state changes to something other than the sourceState.
-func (ac *addrConn) waitForStateChange(ctx context.Context, sourceState ConnectivityState) (ConnectivityState, error) {
-	ac.mu.Lock()
-	defer ac.mu.Unlock()
-	if sourceState != ac.state {
-		return ac.state, nil
-	}
-	done := make(chan struct{})
-	var err error
-	go func() {
-		select {
-		case <-ctx.Done():
-			ac.mu.Lock()
-			err = ctx.Err()
-			ac.stateCV.Broadcast()
-			ac.mu.Unlock()
-		case <-done:
-		}
-	}()
-	defer close(done)
-	for sourceState == ac.state {
-		ac.stateCV.Wait()
-		if err != nil {
-			return ac.state, err
-		}
-	}
-	return ac.state, nil
-}
-
 // resetTransport recreates a transport to the address for ac.
 // For the old transport:
 // - if drain is true, it will be gracefully closed.
 // - otherwise, it will be closed.
 func (ac *addrConn) resetTransport(drain bool) error {
 	ac.mu.Lock()
-	if ac.state == Shutdown {
+	if ac.state == connectivity.Shutdown {
 		ac.mu.Unlock()
 		return errConnClosing
 	}
@@ -841,94 +985,101 @@ func (ac *addrConn) resetTransport(drain bool) error {
 		ac.down(downErrorf(false, true, "%v", errNetworkIO))
 		ac.down = nil
 	}
-	ac.state = Connecting
-	ac.stateCV.Broadcast()
+	oldState := ac.state
+	ac.state = connectivity.Connecting
+	ac.csEvltr.recordTransition(oldState, ac.state)
 	t := ac.transport
 	ac.transport = nil
 	ac.mu.Unlock()
-	if t != nil {
-		if drain {
-			t.GracefulClose()
-		} else {
-			t.Close()
-		}
+	if t != nil && !drain {
+		t.Close()
 	}
 	ac.cc.mu.RLock()
 	ac.dopts.copts.KeepaliveParams = ac.cc.mkp
 	ac.cc.mu.RUnlock()
 	for retries := 0; ; retries++ {
 		ac.mu.Lock()
-		if ac.state == Shutdown {
-			// ac.tearDown(...) has been invoked.
-			ac.mu.Unlock()
-			return errConnClosing
-		}
-		ac.mu.Unlock()
 		sleepTime := ac.dopts.bs.backoff(retries)
 		timeout := minConnectTimeout
-		if timeout < sleepTime {
-			timeout = sleepTime
+		if timeout < time.Duration(int(sleepTime)/len(ac.addrs)) {
+			timeout = time.Duration(int(sleepTime) / len(ac.addrs))
 		}
-		ctx, cancel := context.WithTimeout(ac.ctx, timeout)
 		connectTime := time.Now()
-		sinfo := transport.TargetInfo{
-			Addr:     ac.addr.Addr,
-			Metadata: ac.addr.Metadata,
-		}
-		newTransport, err := transport.NewClientTransport(ctx, sinfo, ac.dopts.copts)
-		// Don't call cancel in success path due to a race in Go 1.6:
-		// https://github.com/golang/go/issues/15078.
-		if err != nil {
-			cancel()
-
-			if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() {
-				return err
+		// copy ac.addrs in case of race
+		addrsIter := make([]Address, len(ac.addrs))
+		copy(addrsIter, ac.addrs)
+		ac.mu.Unlock()
+		for _, addr := range addrsIter {
+			ac.mu.Lock()
+			if ac.state == connectivity.Shutdown {
+				// ac.tearDown(...) has been invoked.
+				ac.mu.Unlock()
+				return errConnClosing
+			}
+			ac.mu.Unlock()
+			ctx, cancel := context.WithTimeout(ac.ctx, timeout)
+			sinfo := transport.TargetInfo{
+				Addr:     addr.Addr,
+				Metadata: addr.Metadata,
+			}
+			newTransport, err := transport.NewClientTransport(ctx, sinfo, ac.dopts.copts)
+			// Don't call cancel in success path due to a race in Go 1.6:
+			// https://github.com/golang/go/issues/15078.
+			if err != nil {
+				cancel()
+
+				if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() {
+					return err
+				}
+				grpclog.Warningf("grpc: addrConn.resetTransport failed to create client transport: %v; Reconnecting to %v", err, addr)
+				ac.mu.Lock()
+				if ac.state == connectivity.Shutdown {
+					// ac.tearDown(...) has been invoked.
+					ac.mu.Unlock()
+					return errConnClosing
+				}
+				ac.errorf("transient failure: %v", err)
+				oldState = ac.state
+				ac.state = connectivity.TransientFailure
+				ac.csEvltr.recordTransition(oldState, ac.state)
+				if ac.ready != nil {
+					close(ac.ready)
+					ac.ready = nil
+				}
+				ac.mu.Unlock()
+				continue
 			}
-			grpclog.Warningf("grpc: addrConn.resetTransport failed to create client transport: %v; Reconnecting to %v", err, ac.addr)
 			ac.mu.Lock()
-			if ac.state == Shutdown {
+			ac.printf("ready")
+			if ac.state == connectivity.Shutdown {
 				// ac.tearDown(...) has been invoked.
 				ac.mu.Unlock()
+				newTransport.Close()
 				return errConnClosing
 			}
-			ac.errorf("transient failure: %v", err)
-			ac.state = TransientFailure
-			ac.stateCV.Broadcast()
+			oldState = ac.state
+			ac.state = connectivity.Ready
+			ac.csEvltr.recordTransition(oldState, ac.state)
+			ac.transport = newTransport
 			if ac.ready != nil {
 				close(ac.ready)
 				ac.ready = nil
 			}
-			ac.mu.Unlock()
-			timer := time.NewTimer(sleepTime - time.Since(connectTime))
-			select {
-			case <-timer.C:
-			case <-ac.ctx.Done():
-				timer.Stop()
-				return ac.ctx.Err()
+			if ac.cc.dopts.balancer != nil {
+				ac.down = ac.cc.dopts.balancer.Up(addr)
 			}
-			timer.Stop()
-			continue
-		}
-		ac.mu.Lock()
-		ac.printf("ready")
-		if ac.state == Shutdown {
-			// ac.tearDown(...) has been invoked.
+			ac.curAddr = addr
 			ac.mu.Unlock()
-			newTransport.Close()
-			return errConnClosing
-		}
-		ac.state = Ready
-		ac.stateCV.Broadcast()
-		ac.transport = newTransport
-		if ac.ready != nil {
-			close(ac.ready)
-			ac.ready = nil
+			return nil
 		}
-		if ac.cc.dopts.balancer != nil {
-			ac.down = ac.cc.dopts.balancer.Up(ac.addr)
+		timer := time.NewTimer(sleepTime - time.Since(connectTime))
+		select {
+		case <-timer.C:
+		case <-ac.ctx.Done():
+			timer.Stop()
+			return ac.ctx.Err()
 		}
-		ac.mu.Unlock()
-		return nil
+		timer.Stop()
 	}
 }
 
@@ -988,13 +1139,14 @@ func (ac *addrConn) transportMonitor() {
 			default:
 			}
 			ac.mu.Lock()
-			if ac.state == Shutdown {
+			if ac.state == connectivity.Shutdown {
 				// ac has been shutdown.
 				ac.mu.Unlock()
 				return
 			}
-			ac.state = TransientFailure
-			ac.stateCV.Broadcast()
+			oldState := ac.state
+			ac.state = connectivity.TransientFailure
+			ac.csEvltr.recordTransition(oldState, ac.state)
 			ac.mu.Unlock()
 			if err := ac.resetTransport(false); err != nil {
 				grpclog.Infof("get error from resetTransport %v, transportMonitor returning", err)
@@ -1013,12 +1165,12 @@ func (ac *addrConn) transportMonitor() {
 }
 
 // wait blocks until i) the new transport is up or ii) ctx is done or iii) ac is closed or
-// iv) transport is in TransientFailure and there is a balancer/failfast is true.
+// iv) transport is in connectivity.TransientFailure and there is a balancer/failfast is true.
 func (ac *addrConn) wait(ctx context.Context, hasBalancer, failfast bool) (transport.ClientTransport, error) {
 	for {
 		ac.mu.Lock()
 		switch {
-		case ac.state == Shutdown:
+		case ac.state == connectivity.Shutdown:
 			if failfast || !hasBalancer {
 				// RPC is failfast or balancer is nil. This RPC should fail with ac.tearDownErr.
 				err := ac.tearDownErr
@@ -1027,11 +1179,11 @@ func (ac *addrConn) wait(ctx context.Context, hasBalancer, failfast bool) (trans
 			}
 			ac.mu.Unlock()
 			return nil, errConnClosing
-		case ac.state == Ready:
+		case ac.state == connectivity.Ready:
 			ct := ac.transport
 			ac.mu.Unlock()
 			return ct, nil
-		case ac.state == TransientFailure:
+		case ac.state == connectivity.TransientFailure:
 			if failfast || hasBalancer {
 				ac.mu.Unlock()
 				return nil, errConnUnavailable
@@ -1061,6 +1213,7 @@ func (ac *addrConn) tearDown(err error) {
 	ac.cancel()
 
 	ac.mu.Lock()
+	ac.curAddr = Address{}
 	defer ac.mu.Unlock()
 	if ac.down != nil {
 		ac.down(downErrorf(false, false, "%v", err))
@@ -1073,12 +1226,13 @@ func (ac *addrConn) tearDown(err error) {
 		// address removal and GoAway.
 		ac.transport.GracefulClose()
 	}
-	if ac.state == Shutdown {
+	if ac.state == connectivity.Shutdown {
 		return
 	}
-	ac.state = Shutdown
+	oldState := ac.state
+	ac.state = connectivity.Shutdown
 	ac.tearDownErr = err
-	ac.stateCV.Broadcast()
+	ac.csEvltr.recordTransition(oldState, ac.state)
 	if ac.events != nil {
 		ac.events.Finish()
 		ac.events = nil

cmd/vendor/google.golang.org/grpc/codes/code_string.go

@@ -1,4 +1,4 @@
-// generated by stringer -type=Code; DO NOT EDIT
+// Code generated by "stringer -type=Code"; DO NOT EDIT.
 
 package codes
 
@@ -9,7 +9,7 @@ const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlre
 var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192}
 
 func (i Code) String() string {
-	if i+1 >= Code(len(_Code_index)) {
+	if i >= Code(len(_Code_index)-1) {
 		return fmt.Sprintf("Code(%d)", i)
 	}
 	return _Code_name[_Code_index[i]:_Code_index[i+1]]

cmd/vendor/google.golang.org/grpc/connectivity/connectivity.go

@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package connectivity defines connectivity semantics.
+// For details, see https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md.
+// All APIs in this package are experimental.
+package connectivity
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/grpclog"
+)
+
+// State indicates the state of connectivity.
+// It can be the state of a ClientConn or SubConn.
+type State int
+
+func (s State) String() string {
+	switch s {
+	case Idle:
+		return "IDLE"
+	case Connecting:
+		return "CONNECTING"
+	case Ready:
+		return "READY"
+	case TransientFailure:
+		return "TRANSIENT_FAILURE"
+	case Shutdown:
+		return "SHUTDOWN"
+	default:
+		grpclog.Errorf("unknown connectivity state: %d", s)
+		return "Invalid-State"
+	}
+}
+
+const (
+	// Idle indicates the ClientConn is idle.
+	Idle State = iota
+	// Connecting indicates the ClienConn is connecting.
+	Connecting
+	// Ready indicates the ClientConn is ready for work.
+	Ready
+	// TransientFailure indicates the ClientConn has seen a failure but expects to recover.
+	TransientFailure
+	// Shutdown indicates the ClientConn has started shutting down.
+	Shutdown
+)
+
+// Reporter reports the connectivity states.
+type Reporter interface {
+	// CurrentState returns the current state of the reporter.
+	CurrentState() State
+	// WaitForStateChange blocks until the reporter's state is different from the given state,
+	// and returns true.
+	// It returns false if <-ctx.Done() can proceed (ctx got timeout or got canceled).
+	WaitForStateChange(context.Context, State) bool
+}

cmd/vendor/google.golang.org/grpc/doc.go

@@ -1,3 +1,21 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
 /*
 Package grpc implements an RPC system called gRPC.
 

cmd/vendor/google.golang.org/grpc/grpclb.go

@@ -28,7 +28,7 @@ import (
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/codes"
-	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1"
+	lbmpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/naming"
@@ -59,38 +59,18 @@ type balanceLoadClientStream struct {
 	ClientStream
 }
 
-func (x *balanceLoadClientStream) Send(m *lbpb.LoadBalanceRequest) error {
+func (x *balanceLoadClientStream) Send(m *lbmpb.LoadBalanceRequest) error {
 	return x.ClientStream.SendMsg(m)
 }
 
-func (x *balanceLoadClientStream) Recv() (*lbpb.LoadBalanceResponse, error) {
-	m := new(lbpb.LoadBalanceResponse)
+func (x *balanceLoadClientStream) Recv() (*lbmpb.LoadBalanceResponse, error) {
+	m := new(lbmpb.LoadBalanceResponse)
 	if err := x.ClientStream.RecvMsg(m); err != nil {
 		return nil, err
 	}
 	return m, nil
 }
 
-// AddressType indicates the address type returned by name resolution.
-type AddressType uint8
-
-const (
-	// Backend indicates the server is a backend server.
-	Backend AddressType = iota
-	// GRPCLB indicates the server is a grpclb load balancer.
-	GRPCLB
-)
-
-// AddrMetadataGRPCLB contains the information the name resolver for grpclb should provide. The
-// name resolver used by the grpclb balancer is required to provide this type of metadata in
-// its address updates.
-type AddrMetadataGRPCLB struct {
-	// AddrType is the type of server (grpc load balancer or backend).
-	AddrType AddressType
-	// ServerName is the name of the grpc load balancer. Used for authentication.
-	ServerName string
-}
-
 // NewGRPCLBBalancer creates a grpclb load balancer.
 func NewGRPCLBBalancer(r naming.Resolver) Balancer {
 	return &balancer{
@@ -117,21 +97,20 @@ type grpclbAddrInfo struct {
 }
 
 type balancer struct {
-	r        naming.Resolver
-	target   string
-	mu       sync.Mutex
-	seq      int // a sequence number to make sure addrCh does not get stale addresses.
-	w        naming.Watcher
-	addrCh   chan []Address
-	rbs      []remoteBalancerInfo
-	addrs    []*grpclbAddrInfo
-	next     int
-	waitCh   chan struct{}
-	done     bool
-	expTimer *time.Timer
-	rand     *rand.Rand
-
-	clientStats lbpb.ClientStats
+	r      naming.Resolver
+	target string
+	mu     sync.Mutex
+	seq    int // a sequence number to make sure addrCh does not get stale addresses.
+	w      naming.Watcher
+	addrCh chan []Address
+	rbs    []remoteBalancerInfo
+	addrs  []*grpclbAddrInfo
+	next   int
+	waitCh chan struct{}
+	done   bool
+	rand   *rand.Rand
+
+	clientStats lbmpb.ClientStats
 }
 
 func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
@@ -159,18 +138,18 @@ func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerIn
 			if exist {
 				continue
 			}
-			md, ok := update.Metadata.(*AddrMetadataGRPCLB)
+			md, ok := update.Metadata.(*naming.AddrMetadataGRPCLB)
 			if !ok {
 				// TODO: Revisit the handling here and may introduce some fallback mechanism.
 				grpclog.Errorf("The name resolution contains unexpected metadata %v", update.Metadata)
 				continue
 			}
 			switch md.AddrType {
-			case Backend:
+			case naming.Backend:
 				// TODO: Revisit the handling here and may introduce some fallback mechanism.
 				grpclog.Errorf("The name resolution does not give grpclb addresses")
 				continue
-			case GRPCLB:
+			case naming.GRPCLB:
 				b.rbs = append(b.rbs, remoteBalancerInfo{
 					addr: update.Addr,
 					name: md.ServerName,
@@ -201,34 +180,18 @@ func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerIn
 	return nil
 }
 
-func (b *balancer) serverListExpire(seq int) {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	// TODO: gRPC interanls do not clear the connections when the server list is stale.
-	// This means RPCs will keep using the existing server list until b receives new
-	// server list even though the list is expired. Revisit this behavior later.
-	if b.done || seq < b.seq {
-		return
-	}
-	b.next = 0
-	b.addrs = nil
-	// Ask grpc internals to close all the corresponding connections.
-	b.addrCh <- nil
-}
-
-func convertDuration(d *lbpb.Duration) time.Duration {
+func convertDuration(d *lbmpb.Duration) time.Duration {
 	if d == nil {
 		return 0
 	}
 	return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
 }
 
-func (b *balancer) processServerList(l *lbpb.ServerList, seq int) {
+func (b *balancer) processServerList(l *lbmpb.ServerList, seq int) {
 	if l == nil {
 		return
 	}
 	servers := l.GetServers()
-	expiration := convertDuration(l.GetExpirationInterval())
 	var (
 		sl    []*grpclbAddrInfo
 		addrs []Address
@@ -263,15 +226,6 @@ func (b *balancer) processServerList(l *lbpb.ServerList, seq int) {
 		b.next = 0
 		b.addrs = sl
 		b.addrCh <- addrs
-		if b.expTimer != nil {
-			b.expTimer.Stop()
-			b.expTimer = nil
-		}
-		if expiration > 0 {
-			b.expTimer = time.AfterFunc(expiration, func() {
-				b.serverListExpire(seq)
-			})
-		}
 	}
 	return
 }
@@ -287,15 +241,15 @@ func (b *balancer) sendLoadReport(s *balanceLoadClientStream, interval time.Dura
 		}
 		b.mu.Lock()
 		stats := b.clientStats
-		b.clientStats = lbpb.ClientStats{} // Clear the stats.
+		b.clientStats = lbmpb.ClientStats{} // Clear the stats.
 		b.mu.Unlock()
 		t := time.Now()
-		stats.Timestamp = &lbpb.Timestamp{
+		stats.Timestamp = &lbmpb.Timestamp{
 			Seconds: t.Unix(),
 			Nanos:   int32(t.Nanosecond()),
 		}
-		if err := s.Send(&lbpb.LoadBalanceRequest{
-			LoadBalanceRequestType: &lbpb.LoadBalanceRequest_ClientStats{
+		if err := s.Send(&lbmpb.LoadBalanceRequest{
+			LoadBalanceRequestType: &lbmpb.LoadBalanceRequest_ClientStats{
 				ClientStats: &stats,
 			},
 		}); err != nil {
@@ -319,9 +273,9 @@ func (b *balancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry b
 		return
 	}
 	b.mu.Unlock()
-	initReq := &lbpb.LoadBalanceRequest{
-		LoadBalanceRequestType: &lbpb.LoadBalanceRequest_InitialRequest{
-			InitialRequest: &lbpb.InitialLoadBalanceRequest{
+	initReq := &lbmpb.LoadBalanceRequest{
+		LoadBalanceRequestType: &lbmpb.LoadBalanceRequest_InitialRequest{
+			InitialRequest: &lbmpb.InitialLoadBalanceRequest{
 				Name: b.target,
 			},
 		},
@@ -351,7 +305,7 @@ func (b *balancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry b
 	streamDone := make(chan struct{})
 	defer close(streamDone)
 	b.mu.Lock()
-	b.clientStats = lbpb.ClientStats{} // Clear client stats.
+	b.clientStats = lbmpb.ClientStats{} // Clear client stats.
 	b.mu.Unlock()
 	if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
 		go b.sendLoadReport(stream, d, streamDone)
@@ -741,9 +695,6 @@ func (b *balancer) Close() error {
 		return errBalancerClosed
 	}
 	b.done = true
-	if b.expTimer != nil {
-		b.expTimer.Stop()
-	}
 	if b.waitCh != nil {
 		close(b.waitCh)
 	}

cmd/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.pb.go → cmd/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/messages.pb.go

@@ -1,12 +1,11 @@
-// Code generated by protoc-gen-go.
-// source: grpclb.proto
-// DO NOT EDIT!
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: grpc_lb_v1/messages/messages.proto
 
 /*
-Package grpc_lb_v1 is a generated protocol buffer package.
+Package messages is a generated protocol buffer package.
 
 It is generated from these files:
-	grpclb.proto
+	grpc_lb_v1/messages/messages.proto
 
 It has these top-level messages:
 	Duration
@@ -19,7 +18,7 @@ It has these top-level messages:
 	ServerList
 	Server
 */
-package grpc_lb_v1
+package messages
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -473,11 +472,6 @@ type ServerList struct {
 	// across more servers. The client should consume the server list in order
 	// unless instructed otherwise via the client_config.
 	Servers []*Server `protobuf:"bytes,1,rep,name=servers" json:"servers,omitempty"`
-	// Indicates the amount of time that the client should consider this server
-	// list as valid. It may be considered stale after waiting this interval of
-	// time after receiving the list. If the interval is not positive, the
-	// client can assume the list is valid until the next list is received.
-	ExpirationInterval *Duration `protobuf:"bytes,3,opt,name=expiration_interval,json=expirationInterval" json:"expiration_interval,omitempty"`
 }
 
 func (m *ServerList) Reset()                    { *m = ServerList{} }
@@ -492,13 +486,6 @@ func (m *ServerList) GetServers() []*Server {
 	return nil
 }
 
-func (m *ServerList) GetExpirationInterval() *Duration {
-	if m != nil {
-		return m.ExpirationInterval
-	}
-	return nil
-}
-
 // Contains server information. When none of the [drop_for_*] fields are true,
 // use the other fields. When drop_for_rate_limiting is true, ignore all other
 // fields. Use drop_for_load_balancing only when it is true and
@@ -576,54 +563,53 @@ func init() {
 	proto.RegisterType((*Server)(nil), "grpc.lb.v1.Server")
 }
 
-func init() { proto.RegisterFile("grpclb.proto", fileDescriptor0) }
+func init() { proto.RegisterFile("grpc_lb_v1/messages/messages.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 733 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x55, 0xdd, 0x4e, 0x1b, 0x39,
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-	0x7b, 0xa4, 0x4b, 0xa3, 0x48, 0xdb, 0x33, 0x29, 0xc3, 0x42, 0x77, 0xaa, 0x02, 0x5e, 0x12, 0xfd,
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-	0x13, 0x1a, 0x86, 0x8a, 0x69, 0x3f, 0x34, 0xcb, 0xb8, 0xc8, 0xe3, 0x57, 0x3e, 0x60, 0xe7, 0x87,
-	0x55, 0x9f, 0x4c, 0x4d, 0xf7, 0x6d, 0xed, 0x7c, 0xe3, 0x2e, 0x8c, 0xbc, 0x62, 0xc2, 0x69, 0x28,
-	0xe2, 0xe5, 0x5c, 0x2b, 0xcf, 0x6c, 0x1c, 0xed, 0xc3, 0xea, 0x14, 0xdb, 0x2e, 0xe2, 0x95, 0x70,
-	0x8c, 0x45, 0x9f, 0xc2, 0xda, 0x34, 0x2b, 0x2e, 0xe2, 0x4a, 0x38, 0xc6, 0x76, 0xcd, 0x0e, 0x94,
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-	0x0a, 0x00, 0x00, 0xff, 0xff, 0x64, 0xbf, 0xda, 0x5e, 0xce, 0x06, 0x00, 0x00,
+	// 709 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x55, 0xdd, 0x4e, 0x1b, 0x3b,
+	0x10, 0x26, 0x27, 0x01, 0x92, 0x09, 0x3a, 0xe4, 0x98, 0x1c, 0x08, 0x14, 0x24, 0xba, 0x52, 0x69,
+	0x54, 0xd1, 0x20, 0xa0, 0xbd, 0xe8, 0xcf, 0x45, 0x1b, 0x10, 0x0a, 0x2d, 0x17, 0x95, 0x43, 0x55,
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+	0x7d, 0x8c, 0xaa, 0xcf, 0xd0, 0xf7, 0xa9, 0xd6, 0xbb, 0x9b, 0x5d, 0x20, 0x80, 0x7a, 0x67, 0x8f,
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+	0x19, 0x94, 0x7e, 0x63, 0xce, 0x09, 0x6c, 0x4d, 0x13, 0x88, 0x3f, 0xd5, 0x91, 0xc3, 0x9f, 0xaa,
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+	0x1a, 0x5b, 0xf7, 0x59, 0x20, 0x46, 0x77, 0x66, 0xe8, 0xe2, 0xc4, 0x03, 0x09, 0xe9, 0x0b, 0xa8,
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+	0x32, 0xf3, 0xdc, 0x3a, 0x32, 0xe3, 0x95, 0x4e, 0x5a, 0x75, 0x81, 0xd2, 0x99, 0xb1, 0x42, 0x6b,
+	0xb9, 0x46, 0x9c, 0x46, 0x71, 0xb2, 0x0f, 0xcb, 0x77, 0x98, 0xae, 0x4c, 0x97, 0xfc, 0x29, 0x06,
+	0x7b, 0x0e, 0x2b, 0x77, 0x19, 0xa9, 0x4c, 0xeb, 0xfe, 0x14, 0xd3, 0xb4, 0xe1, 0x73, 0x39, 0xfd,
+	0x47, 0xf4, 0xe6, 0xdc, 0x4f, 0x62, 0xff, 0x4f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xa3, 0x36, 0x86,
+	0xa6, 0x4a, 0x06, 0x00, 0x00,
 }

cmd/vendor/google.golang.org/grpc/grpclog/grpclog.go

@@ -1,33 +1,18 @@
 /*
  *
- * Copyright 2017, Google Inc.
- * All rights reserved.
+ * Copyright 2017 gRPC authors.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  *
  */
 
@@ -99,6 +84,7 @@ func Errorln(args ...interface{}) {
 // It calls os.Exit() with exit code 1.
 func Fatal(args ...interface{}) {
 	logger.Fatal(args...)
+	// Make sure fatal logs will exit.
 	os.Exit(1)
 }
 
@@ -106,6 +92,7 @@ func Fatal(args ...interface{}) {
 // It calles os.Exit() with exit code 1.
 func Fatalf(format string, args ...interface{}) {
 	logger.Fatalf(format, args...)
+	// Make sure fatal logs will exit.
 	os.Exit(1)
 }
 
@@ -113,6 +100,7 @@ func Fatalf(format string, args ...interface{}) {
 // It calle os.Exit()) with exit code 1.
 func Fatalln(args ...interface{}) {
 	logger.Fatalln(args...)
+	// Make sure fatal logs will exit.
 	os.Exit(1)
 }
 

cmd/vendor/google.golang.org/grpc/grpclog/loggerv2.go

@@ -1,33 +1,18 @@
 /*
  *
- * Copyright 2017, Google Inc.
- * All rights reserved.
+ * Copyright 2017 gRPC authors.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  *
  */
 
@@ -62,13 +47,16 @@ type LoggerV2 interface {
 	// Errorf logs to ERROR log. Arguments are handled in the manner of fmt.Printf.
 	Errorf(format string, args ...interface{})
 	// Fatal logs to ERROR log. Arguments are handled in the manner of fmt.Print.
-	// This function should call os.Exit() with a non-zero exit code.
+	// gRPC ensures that all Fatal logs will exit with os.Exit(1).
+	// Implementations may also call os.Exit() with a non-zero exit code.
 	Fatal(args ...interface{})
 	// Fatalln logs to ERROR log. Arguments are handled in the manner of fmt.Println.
-	// This function should call os.Exit() with a non-zero exit code.
+	// gRPC ensures that all Fatal logs will exit with os.Exit(1).
+	// Implementations may also call os.Exit() with a non-zero exit code.
 	Fatalln(args ...interface{})
 	// Fatalf logs to ERROR log. Arguments are handled in the manner of fmt.Printf.
-	// This function should call os.Exit() with a non-zero exit code.
+	// gRPC ensures that all Fatal logs will exit with os.Exit(1).
+	// Implementations may also call os.Exit() with a non-zero exit code.
 	Fatalf(format string, args ...interface{})
 	// V reports whether verbosity level l is at least the requested verbose level.
 	V(l int) bool
@@ -189,14 +177,17 @@ func (g *loggerT) Errorf(format string, args ...interface{}) {
 
 func (g *loggerT) Fatal(args ...interface{}) {
 	g.m[fatalLog].Fatal(args...)
+	// No need to call os.Exit() again because log.Logger.Fatal() calls os.Exit().
 }
 
 func (g *loggerT) Fatalln(args ...interface{}) {
 	g.m[fatalLog].Fatalln(args...)
+	// No need to call os.Exit() again because log.Logger.Fatal() calls os.Exit().
 }
 
 func (g *loggerT) Fatalf(format string, args ...interface{}) {
 	g.m[fatalLog].Fatalf(format, args...)
+	// No need to call os.Exit() again because log.Logger.Fatal() calls os.Exit().
 }
 
 func (g *loggerT) V(l int) bool {

cmd/vendor/google.golang.org/grpc/health/grpc_health_v1/health.pb.go

@@ -1,12 +1,11 @@
-// Code generated by protoc-gen-go.
-// source: health.proto
-// DO NOT EDIT!
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: grpc_health_v1/health.proto
 
 /*
 Package grpc_health_v1 is a generated protocol buffer package.
 
 It is generated from these files:
-	health.proto
+	grpc_health_v1/health.proto
 
 It has these top-level messages:
 	HealthCheckRequest
@@ -69,6 +68,13 @@ func (m *HealthCheckRequest) String() string            { return proto.CompactTe
 func (*HealthCheckRequest) ProtoMessage()               {}
 func (*HealthCheckRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
 
+func (m *HealthCheckRequest) GetService() string {
+	if m != nil {
+		return m.Service
+	}
+	return ""
+}
+
 type HealthCheckResponse struct {
 	Status HealthCheckResponse_ServingStatus `protobuf:"varint,1,opt,name=status,enum=grpc.health.v1.HealthCheckResponse_ServingStatus" json:"status,omitempty"`
 }
@@ -78,6 +84,13 @@ func (m *HealthCheckResponse) String() string            { return proto.CompactT
 func (*HealthCheckResponse) ProtoMessage()               {}
 func (*HealthCheckResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
 
+func (m *HealthCheckResponse) GetStatus() HealthCheckResponse_ServingStatus {
+	if m != nil {
+		return m.Status
+	}
+	return HealthCheckResponse_UNKNOWN
+}
+
 func init() {
 	proto.RegisterType((*HealthCheckRequest)(nil), "grpc.health.v1.HealthCheckRequest")
 	proto.RegisterType((*HealthCheckResponse)(nil), "grpc.health.v1.HealthCheckResponse")
@@ -153,24 +166,25 @@ var _Health_serviceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "health.proto",
+	Metadata: "grpc_health_v1/health.proto",
 }
 
-func init() { proto.RegisterFile("health.proto", fileDescriptor0) }
+func init() { proto.RegisterFile("grpc_health_v1/health.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 204 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0xc9, 0x48, 0x4d, 0xcc,
-	0x29, 0xc9, 0xd0, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x4b, 0x2f, 0x2a, 0x48, 0xd6, 0x83,
-	0x0a, 0x95, 0x19, 0x2a, 0xe9, 0x71, 0x09, 0x79, 0x80, 0x39, 0xce, 0x19, 0xa9, 0xc9, 0xd9, 0x41,
-	0xa9, 0x85, 0xa5, 0xa9, 0xc5, 0x25, 0x42, 0x12, 0x5c, 0xec, 0xc5, 0xa9, 0x45, 0x65, 0x99, 0xc9,
-	0xa9, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0x9c, 0x41, 0x30, 0xae, 0xd2, 0x1c, 0x46, 0x2e, 0x61, 0x14,
-	0x0d, 0xc5, 0x05, 0xf9, 0x79, 0xc5, 0xa9, 0x42, 0x9e, 0x5c, 0x6c, 0xc5, 0x25, 0x89, 0x25, 0xa5,
-	0xc5, 0x60, 0x0d, 0x7c, 0x46, 0x86, 0x7a, 0xa8, 0x16, 0xe9, 0x61, 0xd1, 0xa4, 0x17, 0x0c, 0x32,
-	0x34, 0x2f, 0x3d, 0x18, 0xac, 0x31, 0x08, 0x6a, 0x80, 0x92, 0x15, 0x17, 0x2f, 0x8a, 0x84, 0x10,
-	0x37, 0x17, 0x7b, 0xa8, 0x9f, 0xb7, 0x9f, 0x7f, 0xb8, 0x9f, 0x00, 0x03, 0x88, 0x13, 0xec, 0x1a,
-	0x14, 0xe6, 0xe9, 0xe7, 0x2e, 0xc0, 0x28, 0xc4, 0xcf, 0xc5, 0xed, 0xe7, 0x1f, 0x12, 0x0f, 0x13,
-	0x60, 0x32, 0x8a, 0xe2, 0x62, 0x83, 0x58, 0x24, 0x14, 0xc0, 0xc5, 0x0a, 0xb6, 0x4c, 0x48, 0x09,
-	0xaf, 0x4b, 0xc0, 0xfe, 0x95, 0x52, 0x26, 0xc2, 0xb5, 0x49, 0x6c, 0xe0, 0x10, 0x34, 0x06, 0x04,
-	0x00, 0x00, 0xff, 0xff, 0xac, 0x56, 0x2a, 0xcb, 0x51, 0x01, 0x00, 0x00,
+	// 213 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4e, 0x2f, 0x2a, 0x48,
+	0x8e, 0xcf, 0x48, 0x4d, 0xcc, 0x29, 0xc9, 0x88, 0x2f, 0x33, 0xd4, 0x87, 0xb0, 0xf4, 0x0a, 0x8a,
+	0xf2, 0x4b, 0xf2, 0x85, 0xf8, 0x40, 0x92, 0x7a, 0x50, 0xa1, 0x32, 0x43, 0x25, 0x3d, 0x2e, 0x21,
+	0x0f, 0x30, 0xc7, 0x39, 0x23, 0x35, 0x39, 0x3b, 0x28, 0xb5, 0xb0, 0x34, 0xb5, 0xb8, 0x44, 0x48,
+	0x82, 0x8b, 0xbd, 0x38, 0xb5, 0xa8, 0x2c, 0x33, 0x39, 0x55, 0x82, 0x51, 0x81, 0x51, 0x83, 0x33,
+	0x08, 0xc6, 0x55, 0x9a, 0xc3, 0xc8, 0x25, 0x8c, 0xa2, 0xa1, 0xb8, 0x20, 0x3f, 0xaf, 0x38, 0x55,
+	0xc8, 0x93, 0x8b, 0xad, 0xb8, 0x24, 0xb1, 0xa4, 0xb4, 0x18, 0xac, 0x81, 0xcf, 0xc8, 0x50, 0x0f,
+	0xd5, 0x22, 0x3d, 0x2c, 0x9a, 0xf4, 0x82, 0x41, 0x86, 0xe6, 0xa5, 0x07, 0x83, 0x35, 0x06, 0x41,
+	0x0d, 0x50, 0xb2, 0xe2, 0xe2, 0x45, 0x91, 0x10, 0xe2, 0xe6, 0x62, 0x0f, 0xf5, 0xf3, 0xf6, 0xf3,
+	0x0f, 0xf7, 0x13, 0x60, 0x00, 0x71, 0x82, 0x5d, 0x83, 0xc2, 0x3c, 0xfd, 0xdc, 0x05, 0x18, 0x85,
+	0xf8, 0xb9, 0xb8, 0xfd, 0xfc, 0x43, 0xe2, 0x61, 0x02, 0x4c, 0x46, 0x51, 0x5c, 0x6c, 0x10, 0x8b,
+	0x84, 0x02, 0xb8, 0x58, 0xc1, 0x96, 0x09, 0x29, 0xe1, 0x75, 0x09, 0xd8, 0xbf, 0x52, 0xca, 0x44,
+	0xb8, 0x36, 0x89, 0x0d, 0x1c, 0x82, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x53, 0x2b, 0x65,
+	0x20, 0x60, 0x01, 0x00, 0x00,
 }

cmd/vendor/google.golang.org/grpc/health/health.go

@@ -16,6 +16,8 @@
  *
  */
 
+//go:generate protoc --go_out=plugins=grpc:. grpc_health_v1/health.proto
+
 // Package health provides some utility functions to health-check a server. The implementation
 // is based on protobuf. Users need to write their own implementations if other IDLs are used.
 package health

cmd/vendor/google.golang.org/grpc/metadata/metadata.go

@@ -44,6 +44,9 @@ type MD map[string][]string
 //  - lowercase letters: a-z
 //  - special characters: -_.
 // Uppercase letters are automatically converted to lowercase.
+//
+// Keys beginning with "grpc-" are reserved for grpc-internal use only and may
+// result in errors if set in metadata.
 func New(m map[string]string) MD {
 	md := MD{}
 	for k, val := range m {
@@ -62,6 +65,9 @@ func New(m map[string]string) MD {
 //  - lowercase letters: a-z
 //  - special characters: -_.
 // Uppercase letters are automatically converted to lowercase.
+//
+// Keys beginning with "grpc-" are reserved for grpc-internal use only and may
+// result in errors if set in metadata.
 func Pairs(kv ...string) MD {
 	if len(kv)%2 == 1 {
 		panic(fmt.Sprintf("metadata: Pairs got the odd number of input pairs for metadata: %d", len(kv)))
@@ -104,11 +110,6 @@ func Join(mds ...MD) MD {
 type mdIncomingKey struct{}
 type mdOutgoingKey struct{}
 
-// NewContext is a wrapper for NewOutgoingContext(ctx, md).  Deprecated.
-func NewContext(ctx context.Context, md MD) context.Context {
-	return NewOutgoingContext(ctx, md)
-}
-
 // NewIncomingContext creates a new context with incoming md attached.
 func NewIncomingContext(ctx context.Context, md MD) context.Context {
 	return context.WithValue(ctx, mdIncomingKey{}, md)
@@ -119,11 +120,6 @@ func NewOutgoingContext(ctx context.Context, md MD) context.Context {
 	return context.WithValue(ctx, mdOutgoingKey{}, md)
 }
 
-// FromContext is a wrapper for FromIncomingContext(ctx).  Deprecated.
-func FromContext(ctx context.Context) (md MD, ok bool) {
-	return FromIncomingContext(ctx)
-}
-
 // FromIncomingContext returns the incoming metadata in ctx if it exists.  The
 // returned MD should not be modified. Writing to it may cause races.
 // Modification should be made to copies of the returned MD.

cmd/vendor/google.golang.org/grpc/naming/dns_resolver.go

@@ -0,0 +1,290 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package naming
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"strconv"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/grpclog"
+)
+
+const (
+	defaultPort = "443"
+	defaultFreq = time.Minute * 30
+)
+
+var (
+	errMissingAddr  = errors.New("missing address")
+	errWatcherClose = errors.New("watcher has been closed")
+)
+
+// NewDNSResolverWithFreq creates a DNS Resolver that can resolve DNS names, and
+// create watchers that poll the DNS server using the frequency set by freq.
+func NewDNSResolverWithFreq(freq time.Duration) (Resolver, error) {
+	return &dnsResolver{freq: freq}, nil
+}
+
+// NewDNSResolver creates a DNS Resolver that can resolve DNS names, and create
+// watchers that poll the DNS server using the default frequency defined by defaultFreq.
+func NewDNSResolver() (Resolver, error) {
+	return NewDNSResolverWithFreq(defaultFreq)
+}
+
+// dnsResolver handles name resolution for names following the DNS scheme
+type dnsResolver struct {
+	// frequency of polling the DNS server that the watchers created by this resolver will use.
+	freq time.Duration
+}
+
+// formatIP returns ok = false if addr is not a valid textual representation of an IP address.
+// If addr is an IPv4 address, return the addr and ok = true.
+// If addr is an IPv6 address, return the addr enclosed in square brackets and ok = true.
+func formatIP(addr string) (addrIP string, ok bool) {
+	ip := net.ParseIP(addr)
+	if ip == nil {
+		return "", false
+	}
+	if ip.To4() != nil {
+		return addr, true
+	}
+	return "[" + addr + "]", true
+}
+
+// parseTarget takes the user input target string, returns formatted host and port info.
+// If target doesn't specify a port, set the port to be the defaultPort.
+// If target is in IPv6 format and host-name is enclosed in sqarue brackets, brackets
+// are strippd when setting the host.
+// examples:
+// target: "www.google.com" returns host: "www.google.com", port: "443"
+// target: "ipv4-host:80" returns host: "ipv4-host", port: "80"
+// target: "[ipv6-host]" returns host: "ipv6-host", port: "443"
+// target: ":80" returns host: "localhost", port: "80"
+// target: ":" returns host: "localhost", port: "443"
+func parseTarget(target string) (host, port string, err error) {
+	if target == "" {
+		return "", "", errMissingAddr
+	}
+
+	if ip := net.ParseIP(target); ip != nil {
+		// target is an IPv4 or IPv6(without brackets) address
+		return target, defaultPort, nil
+	}
+	if host, port, err := net.SplitHostPort(target); err == nil {
+		// target has port, i.e ipv4-host:port, [ipv6-host]:port, host-name:port
+		if host == "" {
+			// Keep consistent with net.Dial(): If the host is empty, as in ":80", the local system is assumed.
+			host = "localhost"
+		}
+		if port == "" {
+			// If the port field is empty(target ends with colon), e.g. "[::1]:", defaultPort is used.
+			port = defaultPort
+		}
+		return host, port, nil
+	}
+	if host, port, err := net.SplitHostPort(target + ":" + defaultPort); err == nil {
+		// target doesn't have port
+		return host, port, nil
+	}
+	return "", "", fmt.Errorf("invalid target address %v", target)
+}
+
+// Resolve creates a watcher that watches the name resolution of the target.
+func (r *dnsResolver) Resolve(target string) (Watcher, error) {
+	host, port, err := parseTarget(target)
+	if err != nil {
+		return nil, err
+	}
+
+	if net.ParseIP(host) != nil {
+		ipWatcher := &ipWatcher{
+			updateChan: make(chan *Update, 1),
+		}
+		host, _ = formatIP(host)
+		ipWatcher.updateChan <- &Update{Op: Add, Addr: host + ":" + port}
+		return ipWatcher, nil
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	return &dnsWatcher{
+		r:      r,
+		host:   host,
+		port:   port,
+		ctx:    ctx,
+		cancel: cancel,
+		t:      time.NewTimer(0),
+	}, nil
+}
+
+// dnsWatcher watches for the name resolution update for a specific target
+type dnsWatcher struct {
+	r    *dnsResolver
+	host string
+	port string
+	// The latest resolved address set
+	curAddrs map[string]*Update
+	ctx      context.Context
+	cancel   context.CancelFunc
+	t        *time.Timer
+}
+
+// ipWatcher watches for the name resolution update for an IP address.
+type ipWatcher struct {
+	updateChan chan *Update
+}
+
+// Next returns the adrress resolution Update for the target. For IP address,
+// the resolution is itself, thus polling name server is unncessary. Therefore,
+// Next() will return an Update the first time it is called, and will be blocked
+// for all following calls as no Update exisits until watcher is closed.
+func (i *ipWatcher) Next() ([]*Update, error) {
+	u, ok := <-i.updateChan
+	if !ok {
+		return nil, errWatcherClose
+	}
+	return []*Update{u}, nil
+}
+
+// Close closes the ipWatcher.
+func (i *ipWatcher) Close() {
+	close(i.updateChan)
+}
+
+// AddressType indicates the address type returned by name resolution.
+type AddressType uint8
+
+const (
+	// Backend indicates the server is a backend server.
+	Backend AddressType = iota
+	// GRPCLB indicates the server is a grpclb load balancer.
+	GRPCLB
+)
+
+// AddrMetadataGRPCLB contains the information the name resolver for grpclb should provide. The
+// name resolver used by the grpclb balancer is required to provide this type of metadata in
+// its address updates.
+type AddrMetadataGRPCLB struct {
+	// AddrType is the type of server (grpc load balancer or backend).
+	AddrType AddressType
+	// ServerName is the name of the grpc load balancer. Used for authentication.
+	ServerName string
+}
+
+// compileUpdate compares the old resolved addresses and newly resolved addresses,
+// and generates an update list
+func (w *dnsWatcher) compileUpdate(newAddrs map[string]*Update) []*Update {
+	var res []*Update
+	for a, u := range w.curAddrs {
+		if _, ok := newAddrs[a]; !ok {
+			u.Op = Delete
+			res = append(res, u)
+		}
+	}
+	for a, u := range newAddrs {
+		if _, ok := w.curAddrs[a]; !ok {
+			res = append(res, u)
+		}
+	}
+	return res
+}
+
+func (w *dnsWatcher) lookupSRV() map[string]*Update {
+	newAddrs := make(map[string]*Update)
+	_, srvs, err := lookupSRV(w.ctx, "grpclb", "tcp", w.host)
+	if err != nil {
+		grpclog.Infof("grpc: failed dns SRV record lookup due to %v.\n", err)
+		return nil
+	}
+	for _, s := range srvs {
+		lbAddrs, err := lookupHost(w.ctx, s.Target)
+		if err != nil {
+			grpclog.Warningf("grpc: failed load banlacer address dns lookup due to %v.\n", err)
+			continue
+		}
+		for _, a := range lbAddrs {
+			a, ok := formatIP(a)
+			if !ok {
+				grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
+				continue
+			}
+			addr := a + ":" + strconv.Itoa(int(s.Port))
+			newAddrs[addr] = &Update{Addr: addr,
+				Metadata: AddrMetadataGRPCLB{AddrType: GRPCLB, ServerName: s.Target}}
+		}
+	}
+	return newAddrs
+}
+
+func (w *dnsWatcher) lookupHost() map[string]*Update {
+	newAddrs := make(map[string]*Update)
+	addrs, err := lookupHost(w.ctx, w.host)
+	if err != nil {
+		grpclog.Warningf("grpc: failed dns A record lookup due to %v.\n", err)
+		return nil
+	}
+	for _, a := range addrs {
+		a, ok := formatIP(a)
+		if !ok {
+			grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
+			continue
+		}
+		addr := a + ":" + w.port
+		newAddrs[addr] = &Update{Addr: addr}
+	}
+	return newAddrs
+}
+
+func (w *dnsWatcher) lookup() []*Update {
+	newAddrs := w.lookupSRV()
+	if newAddrs == nil {
+		// If failed to get any balancer address (either no corresponding SRV for the
+		// target, or caused by failure during resolution/parsing of the balancer target),
+		// return any A record info available.
+		newAddrs = w.lookupHost()
+	}
+	result := w.compileUpdate(newAddrs)
+	w.curAddrs = newAddrs
+	return result
+}
+
+// Next returns the resolved address update(delta) for the target. If there's no
+// change, it will sleep for 30 mins and try to resolve again after that.
+func (w *dnsWatcher) Next() ([]*Update, error) {
+	for {
+		select {
+		case <-w.ctx.Done():
+			return nil, errWatcherClose
+		case <-w.t.C:
+		}
+		result := w.lookup()
+		// Next lookup should happen after an interval defined by w.r.freq.
+		w.t.Reset(w.r.freq)
+		if len(result) > 0 {
+			return result, nil
+		}
+	}
+}
+
+func (w *dnsWatcher) Close() {
+	w.cancel()
+}

cmd/vendor/google.golang.org/grpc/naming/go17.go

@@ -0,0 +1,34 @@
+// +build go1.6, !go1.8
+
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package naming
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+)
+
+var (
+	lookupHost = func(ctx context.Context, host string) ([]string, error) { return net.LookupHost(host) }
+	lookupSRV  = func(ctx context.Context, service, proto, name string) (string, []*net.SRV, error) {
+		return net.LookupSRV(service, proto, name)
+	}
+)

cmd/vendor/google.golang.org/grpc/naming/go18.go

@@ -0,0 +1,28 @@
+// +build go1.8
+
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package naming
+
+import "net"
+
+var (
+	lookupHost = net.DefaultResolver.LookupHost
+	lookupSRV  = net.DefaultResolver.LookupSRV
+)

cmd/vendor/google.golang.org/grpc/rpc_util.go

@@ -63,6 +63,7 @@ func NewGZIPCompressor() Compressor {
 
 func (c *gzipCompressor) Do(w io.Writer, p []byte) error {
 	z := c.pool.Get().(*gzip.Writer)
+	defer c.pool.Put(z)
 	z.Reset(w)
 	if _, err := z.Write(p); err != nil {
 		return err
@@ -287,19 +288,20 @@ func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byt
 	return pf, msg, nil
 }
 
-// encode serializes msg and prepends the message header. If msg is nil, it
-// generates the message header of 0 message length.
-func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayload *stats.OutPayload) ([]byte, error) {
-	var (
-		b      []byte
-		length uint
+// encode serializes msg and returns a buffer of message header and a buffer of msg.
+// If msg is nil, it generates the message header and an empty msg buffer.
+func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayload *stats.OutPayload) ([]byte, []byte, error) {
+	var b []byte
+	const (
+		payloadLen = 1
+		sizeLen    = 4
 	)
+
 	if msg != nil {
 		var err error
-		// TODO(zhaoq): optimize to reduce memory alloc and copying.
 		b, err = c.Marshal(msg)
 		if err != nil {
-			return nil, Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
+			return nil, nil, Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
 		}
 		if outPayload != nil {
 			outPayload.Payload = msg
@@ -309,39 +311,28 @@ func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayl
 		}
 		if cp != nil {
 			if err := cp.Do(cbuf, b); err != nil {
-				return nil, Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
+				return nil, nil, Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
 			}
 			b = cbuf.Bytes()
 		}
-		length = uint(len(b))
-	}
-	if length > math.MaxUint32 {
-		return nil, Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", length)
 	}
 
-	const (
-		payloadLen = 1
-		sizeLen    = 4
-	)
-
-	var buf = make([]byte, payloadLen+sizeLen+len(b))
+	if uint(len(b)) > math.MaxUint32 {
+		return nil, nil, Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b))
+	}
 
-	// Write payload format
+	bufHeader := make([]byte, payloadLen+sizeLen)
 	if cp == nil {
-		buf[0] = byte(compressionNone)
+		bufHeader[0] = byte(compressionNone)
 	} else {
-		buf[0] = byte(compressionMade)
+		bufHeader[0] = byte(compressionMade)
 	}
 	// Write length of b into buf
-	binary.BigEndian.PutUint32(buf[1:], uint32(length))
-	// Copy encoded msg to buf
-	copy(buf[5:], b)
-
+	binary.BigEndian.PutUint32(bufHeader[payloadLen:], uint32(len(b)))
 	if outPayload != nil {
-		outPayload.WireLength = len(buf)
+		outPayload.WireLength = payloadLen + sizeLen + len(b)
 	}
-
-	return buf, nil
+	return bufHeader, b, nil
 }
 
 func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) error {
@@ -519,6 +510,6 @@ const SupportPackageIsVersion3 = true
 const SupportPackageIsVersion4 = true
 
 // Version is the current grpc version.
-const Version = "1.5.1"
+const Version = "1.6.0"
 
 const grpcUA = "grpc-go/" + Version

cmd/vendor/google.golang.org/grpc/server.go

@@ -23,6 +23,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math"
 	"net"
 	"net/http"
 	"reflect"
@@ -48,7 +49,7 @@ import (
 
 const (
 	defaultServerMaxReceiveMessageSize = 1024 * 1024 * 4
-	defaultServerMaxSendMessageSize    = 1024 * 1024 * 4
+	defaultServerMaxSendMessageSize    = math.MaxInt32
 )
 
 type methodHandler func(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor UnaryServerInterceptor) (interface{}, error)
@@ -588,6 +589,30 @@ func (s *Server) serveUsingHandler(conn net.Conn) {
 	})
 }
 
+// ServeHTTP implements the Go standard library's http.Handler
+// interface by responding to the gRPC request r, by looking up
+// the requested gRPC method in the gRPC server s.
+//
+// The provided HTTP request must have arrived on an HTTP/2
+// connection. When using the Go standard library's server,
+// practically this means that the Request must also have arrived
+// over TLS.
+//
+// To share one port (such as 443 for https) between gRPC and an
+// existing http.Handler, use a root http.Handler such as:
+//
+//   if r.ProtoMajor == 2 && strings.HasPrefix(
+//   	r.Header.Get("Content-Type"), "application/grpc") {
+//   	grpcServer.ServeHTTP(w, r)
+//   } else {
+//   	yourMux.ServeHTTP(w, r)
+//   }
+//
+// Note that ServeHTTP uses Go's HTTP/2 server implementation which is totally
+// separate from grpc-go's HTTP/2 server. Performance and features may vary
+// between the two paths. ServeHTTP does not support some gRPC features
+// available through grpc-go's HTTP/2 server, and it is currently EXPERIMENTAL
+// and subject to change.
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	st, err := transport.NewServerHandlerTransport(w, r)
 	if err != nil {
@@ -652,15 +677,15 @@ func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Str
 	if s.opts.statsHandler != nil {
 		outPayload = &stats.OutPayload{}
 	}
-	p, err := encode(s.opts.codec, msg, cp, cbuf, outPayload)
+	hdr, data, err := encode(s.opts.codec, msg, cp, cbuf, outPayload)
 	if err != nil {
 		grpclog.Errorln("grpc: server failed to encode response: ", err)
 		return err
 	}
-	if len(p) > s.opts.maxSendMessageSize {
-		return status.Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(p), s.opts.maxSendMessageSize)
+	if len(data) > s.opts.maxSendMessageSize {
+		return status.Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(data), s.opts.maxSendMessageSize)
 	}
-	err = t.Write(stream, p, opts)
+	err = t.Write(stream, hdr, data, opts)
 	if err == nil && outPayload != nil {
 		outPayload.SentTime = time.Now()
 		s.opts.statsHandler.HandleRPC(stream.Context(), outPayload)

cmd/vendor/google.golang.org/grpc/stats/stats.go

@@ -16,6 +16,8 @@
  *
  */
 
+//go:generate protoc --go_out=plugins=grpc:. grpc_testing/test.proto
+
 // Package stats is for collecting and reporting various network and RPC stats.
 // This package is for monitoring purpose only. All fields are read-only.
 // All APIs are experimental.
@@ -24,6 +26,8 @@ package stats // import "google.golang.org/grpc/stats"
 import (
 	"net"
 	"time"
+
+	"golang.org/x/net/context"
 )
 
 // RPCStats contains stats information about RPCs.
@@ -169,7 +173,9 @@ type End struct {
 	Client bool
 	// EndTime is the time when the RPC ends.
 	EndTime time.Time
-	// Error is the error just happened.  It implements status.Status if non-nil.
+	// Error is the error the RPC ended with. It is an error generated from
+	// status.Status and can be converted back to status.Status using
+	// status.FromError if non-nil.
 	Error error
 }
 
@@ -206,3 +212,85 @@ type ConnEnd struct {
 func (s *ConnEnd) IsClient() bool { return s.Client }
 
 func (s *ConnEnd) isConnStats() {}
+
+type incomingTagsKey struct{}
+type outgoingTagsKey struct{}
+
+// SetTags attaches stats tagging data to the context, which will be sent in
+// the outgoing RPC with the header grpc-tags-bin.  Subsequent calls to
+// SetTags will overwrite the values from earlier calls.
+//
+// NOTE: this is provided only for backward compatibilty with existing clients
+// and will likely be removed in an upcoming release.  New uses should transmit
+// this type of data using metadata with a different, non-reserved (i.e. does
+// not begin with "grpc-") header name.
+func SetTags(ctx context.Context, b []byte) context.Context {
+	return context.WithValue(ctx, outgoingTagsKey{}, b)
+}
+
+// Tags returns the tags from the context for the inbound RPC.
+//
+// NOTE: this is provided only for backward compatibilty with existing clients
+// and will likely be removed in an upcoming release.  New uses should transmit
+// this type of data using metadata with a different, non-reserved (i.e. does
+// not begin with "grpc-") header name.
+func Tags(ctx context.Context) []byte {
+	b, _ := ctx.Value(incomingTagsKey{}).([]byte)
+	return b
+}
+
+// SetIncomingTags attaches stats tagging data to the context, to be read by
+// the application (not sent in outgoing RPCs).
+//
+// This is intended for gRPC-internal use ONLY.
+func SetIncomingTags(ctx context.Context, b []byte) context.Context {
+	return context.WithValue(ctx, incomingTagsKey{}, b)
+}
+
+// OutgoingTags returns the tags from the context for the outbound RPC.
+//
+// This is intended for gRPC-internal use ONLY.
+func OutgoingTags(ctx context.Context) []byte {
+	b, _ := ctx.Value(outgoingTagsKey{}).([]byte)
+	return b
+}
+
+type incomingTraceKey struct{}
+type outgoingTraceKey struct{}
+
+// SetTrace attaches stats tagging data to the context, which will be sent in
+// the outgoing RPC with the header grpc-trace-bin.  Subsequent calls to
+// SetTrace will overwrite the values from earlier calls.
+//
+// NOTE: this is provided only for backward compatibilty with existing clients
+// and will likely be removed in an upcoming release.  New uses should transmit
+// this type of data using metadata with a different, non-reserved (i.e. does
+// not begin with "grpc-") header name.
+func SetTrace(ctx context.Context, b []byte) context.Context {
+	return context.WithValue(ctx, outgoingTraceKey{}, b)
+}
+
+// Trace returns the trace from the context for the inbound RPC.
+//
+// NOTE: this is provided only for backward compatibilty with existing clients
+// and will likely be removed in an upcoming release.  New uses should transmit
+// this type of data using metadata with a different, non-reserved (i.e. does
+// not begin with "grpc-") header name.
+func Trace(ctx context.Context) []byte {
+	b, _ := ctx.Value(incomingTraceKey{}).([]byte)
+	return b
+}
+
+// SetIncomingTrace attaches stats tagging data to the context, to be read by
+// the application (not sent in outgoing RPCs).  It is intended for
+// gRPC-internal use.
+func SetIncomingTrace(ctx context.Context, b []byte) context.Context {
+	return context.WithValue(ctx, incomingTraceKey{}, b)
+}
+
+// OutgoingTrace returns the trace from the context for the outbound RPC.  It is
+// intended for gRPC-internal use.
+func OutgoingTrace(ctx context.Context) []byte {
+	b, _ := ctx.Value(outgoingTraceKey{}).([]byte)
+	return b
+}

cmd/vendor/google.golang.org/grpc/status/status.go

@@ -28,9 +28,11 @@
 package status
 
 import (
+	"errors"
 	"fmt"
 
 	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/ptypes"
 	spb "google.golang.org/genproto/googleapis/rpc/status"
 	"google.golang.org/grpc/codes"
 )
@@ -128,3 +130,39 @@ func FromError(err error) (s *Status, ok bool) {
 	}
 	return nil, false
 }
+
+// WithDetails returns a new status with the provided details messages appended to the status.
+// If any errors are encountered, it returns nil and the first error encountered.
+func (s *Status) WithDetails(details ...proto.Message) (*Status, error) {
+	if s.Code() == codes.OK {
+		return nil, errors.New("no error details for status with code OK")
+	}
+	// s.Code() != OK implies that s.Proto() != nil.
+	p := s.Proto()
+	for _, detail := range details {
+		any, err := ptypes.MarshalAny(detail)
+		if err != nil {
+			return nil, err
+		}
+		p.Details = append(p.Details, any)
+	}
+	return &Status{s: p}, nil
+}
+
+// Details returns a slice of details messages attached to the status.
+// If a detail cannot be decoded, the error is returned in place of the detail.
+func (s *Status) Details() []interface{} {
+	if s == nil || s.s == nil {
+		return nil
+	}
+	details := make([]interface{}, 0, len(s.s.Details))
+	for _, any := range s.s.Details {
+		detail := &ptypes.DynamicAny{}
+		if err := ptypes.UnmarshalAny(any, detail); err != nil {
+			details = append(details, err)
+			continue
+		}
+		details = append(details, detail.Message)
+	}
+	return details
+}

cmd/vendor/google.golang.org/grpc/stream.go

@@ -117,6 +117,11 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 
 	if mc.Timeout != nil {
 		ctx, cancel = context.WithTimeout(ctx, *mc.Timeout)
+		defer func() {
+			if err != nil {
+				cancel()
+			}
+		}()
 	}
 
 	opts = append(cc.dopts.callOptions, opts...)
@@ -342,7 +347,7 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 			return
 		}
 		if err == io.EOF {
-			// Specialize the process for server streaming. SendMesg is only called
+			// Specialize the process for server streaming. SendMsg is only called
 			// once when creating the stream object. io.EOF needs to be skipped when
 			// the rpc is early finished (before the stream object is created.).
 			// TODO: It is probably better to move this into the generated code.
@@ -362,7 +367,7 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 			Client: true,
 		}
 	}
-	out, err := encode(cs.codec, m, cs.cp, cs.cbuf, outPayload)
+	hdr, data, err := encode(cs.codec, m, cs.cp, cs.cbuf, outPayload)
 	defer func() {
 		if cs.cbuf != nil {
 			cs.cbuf.Reset()
@@ -374,10 +379,10 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 	if cs.c.maxSendMessageSize == nil {
 		return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
 	}
-	if len(out) > *cs.c.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(out), *cs.c.maxSendMessageSize)
+	if len(data) > *cs.c.maxSendMessageSize {
+		return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), *cs.c.maxSendMessageSize)
 	}
-	err = cs.t.Write(cs.s, out, &transport.Options{Last: false})
+	err = cs.t.Write(cs.s, hdr, data, &transport.Options{Last: false})
 	if err == nil && outPayload != nil {
 		outPayload.SentTime = time.Now()
 		cs.statsHandler.HandleRPC(cs.statsCtx, outPayload)
@@ -449,7 +454,7 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
 }
 
 func (cs *clientStream) CloseSend() (err error) {
-	err = cs.t.Write(cs.s, nil, &transport.Options{Last: true})
+	err = cs.t.Write(cs.s, nil, nil, &transport.Options{Last: true})
 	defer func() {
 		if err != nil {
 			cs.finish(err)
@@ -599,12 +604,16 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
 			}
 			ss.mu.Unlock()
 		}
+		if err != nil && err != io.EOF {
+			st, _ := status.FromError(toRPCErr(err))
+			ss.t.WriteStatus(ss.s, st)
+		}
 	}()
 	var outPayload *stats.OutPayload
 	if ss.statsHandler != nil {
 		outPayload = &stats.OutPayload{}
 	}
-	out, err := encode(ss.codec, m, ss.cp, ss.cbuf, outPayload)
+	hdr, data, err := encode(ss.codec, m, ss.cp, ss.cbuf, outPayload)
 	defer func() {
 		if ss.cbuf != nil {
 			ss.cbuf.Reset()
@@ -613,10 +622,10 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
 	if err != nil {
 		return err
 	}
-	if len(out) > ss.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(out), ss.maxSendMessageSize)
+	if len(data) > ss.maxSendMessageSize {
+		return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), ss.maxSendMessageSize)
 	}
-	if err := ss.t.Write(ss.s, out, &transport.Options{Last: false}); err != nil {
+	if err := ss.t.Write(ss.s, hdr, data, &transport.Options{Last: false}); err != nil {
 		return toRPCErr(err)
 	}
 	if outPayload != nil {
@@ -640,6 +649,10 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
 			}
 			ss.mu.Unlock()
 		}
+		if err != nil && err != io.EOF {
+			st, _ := status.FromError(toRPCErr(err))
+			ss.t.WriteStatus(ss.s, st)
+		}
 	}()
 	var inPayload *stats.InPayload
 	if ss.statsHandler != nil {

cmd/vendor/google.golang.org/grpc/tap/tap.go

@@ -32,8 +32,20 @@ type Info struct {
 	// TODO: More to be added.
 }
 
-// ServerInHandle defines the function which runs when a new stream is created
-// on the server side. Note that it is executed in the per-connection I/O goroutine(s) instead
-// of per-RPC goroutine. Therefore, users should NOT have any blocking/time-consuming
-// work in this handle. Otherwise all the RPCs would slow down.
+// ServerInHandle defines the function which runs before a new stream is created
+// on the server side. If it returns a non-nil error, the stream will not be
+// created and a RST_STREAM will be sent back to the client with REFUSED_STREAM.
+// The client will receive an RPC error "code = Unavailable, desc = stream
+// terminated by RST_STREAM with error code: REFUSED_STREAM".
+//
+// It's intended to be used in situations where you don't want to waste the
+// resources to accept the new stream (e.g. rate-limiting). And the content of
+// the error will be ignored and won't be sent back to the client. For other
+// general usages, please use interceptors.
+//
+// Note that it is executed in the per-connection I/O goroutine(s) instead of
+// per-RPC goroutine. Therefore, users should NOT have any
+// blocking/time-consuming work in this handle. Otherwise all the RPCs would
+// slow down. Also, for the same reason, this handle won't be called
+// concurrently by gRPC.
 type ServerInHandle func(ctx context.Context, info *Info) (context.Context, error)

cmd/vendor/google.golang.org/grpc/transport/bdp_estimator.go

@@ -1,3 +1,21 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
 package transport
 
 import (

cmd/vendor/google.golang.org/grpc/transport/control.go

@@ -74,6 +74,8 @@ func (*resetStream) item() {}
 type goAway struct {
 	code      http2.ErrCode
 	debugData []byte
+	headsUp   bool
+	closeConn bool
 }
 
 func (*goAway) item() {}

cmd/vendor/google.golang.org/grpc/transport/handler_server.go

@@ -33,6 +33,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/golang/protobuf/proto"
 	"golang.org/x/net/context"
 	"golang.org/x/net/http2"
 	"google.golang.org/grpc/codes"
@@ -121,6 +122,11 @@ type serverHandlerTransport struct {
 	// ServeHTTP (HandleStreams) goroutine. The channel is closed
 	// when WriteStatus is called.
 	writes chan func()
+
+	mu sync.Mutex
+	// streamDone indicates whether WriteStatus has been called and writes channel
+	// has been closed.
+	streamDone bool
 }
 
 func (ht *serverHandlerTransport) Close() error {
@@ -172,6 +178,12 @@ func (ht *serverHandlerTransport) do(fn func()) error {
 }
 
 func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) error {
+	ht.mu.Lock()
+	if ht.streamDone {
+		ht.mu.Unlock()
+		return nil
+	}
+	ht.mu.Unlock()
 	err := ht.do(func() {
 		ht.writeCommonHeaders(s)
 
@@ -186,7 +198,15 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
 			h.Set("Grpc-Message", encodeGrpcMessage(m))
 		}
 
-		// TODO: Support Grpc-Status-Details-Bin
+		if p := st.Proto(); p != nil && len(p.Details) > 0 {
+			stBytes, err := proto.Marshal(p)
+			if err != nil {
+				// TODO: return error instead, when callers are able to handle it.
+				panic(err)
+			}
+
+			h.Set("Grpc-Status-Details-Bin", encodeBinHeader(stBytes))
+		}
 
 		if md := s.Trailer(); len(md) > 0 {
 			for k, vv := range md {
@@ -203,6 +223,9 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
 		}
 	})
 	close(ht.writes)
+	ht.mu.Lock()
+	ht.streamDone = true
+	ht.mu.Unlock()
 	return err
 }
 
@@ -225,16 +248,17 @@ func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) {
 	// and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers
 	h.Add("Trailer", "Grpc-Status")
 	h.Add("Trailer", "Grpc-Message")
-	// TODO: Support Grpc-Status-Details-Bin
+	h.Add("Trailer", "Grpc-Status-Details-Bin")
 
 	if s.sendCompress != "" {
 		h.Set("Grpc-Encoding", s.sendCompress)
 	}
 }
 
-func (ht *serverHandlerTransport) Write(s *Stream, data []byte, opts *Options) error {
+func (ht *serverHandlerTransport) Write(s *Stream, hdr []byte, data []byte, opts *Options) error {
 	return ht.do(func() {
 		ht.writeCommonHeaders(s)
+		ht.rw.Write(hdr)
 		ht.rw.Write(data)
 		if !opts.Delay {
 			ht.rw.(http.Flusher).Flush()

cmd/vendor/google.golang.org/grpc/transport/http2_client.go

@@ -98,7 +98,8 @@ type http2Client struct {
 
 	initialWindowSize int32
 
-	bdpEst *bdpEstimator
+	bdpEst          *bdpEstimator
+	outQuotaVersion uint32
 
 	mu            sync.Mutex     // guard the following variables
 	state         transportState // the state of underlying connection
@@ -107,8 +108,6 @@ type http2Client struct {
 	maxStreams int
 	// the per-stream outbound flow control window size set by the peer.
 	streamSendQuota uint32
-	// goAwayID records the Last-Stream-ID in the GoAway frame from the server.
-	goAwayID uint32
 	// prevGoAway ID records the Last-Stream-ID in the previous GOAway frame.
 	prevGoAwayID uint32
 	// goAwayReason records the http2.ErrCode and debug data received with the
@@ -350,18 +349,13 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
 	// Create an audience string only if needed.
 	if len(t.creds) > 0 || callHdr.Creds != nil {
 		// Construct URI required to get auth request metadata.
-		var port string
-		if pos := strings.LastIndex(t.target, ":"); pos != -1 {
-			// Omit port if it is the default one.
-			if t.target[pos+1:] != "443" {
-				port = ":" + t.target[pos+1:]
-			}
-		}
+		// Omit port if it is the default one.
+		host := strings.TrimSuffix(callHdr.Host, ":443")
 		pos := strings.LastIndex(callHdr.Method, "/")
 		if pos == -1 {
 			pos = len(callHdr.Method)
 		}
-		audience = "https://" + callHdr.Host + port + callHdr.Method[:pos]
+		audience = "https://" + host + callHdr.Method[:pos]
 	}
 	for _, c := range t.creds {
 		data, err := c.GetRequestMetadata(ctx, audience)
@@ -441,6 +435,10 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
 		select {
 		case t.awakenKeepalive <- struct{}{}:
 			t.framer.writePing(false, false, [8]byte{})
+			// Fill the awakenKeepalive channel again as this channel must be
+			// kept non-writable except at the point that the keepalive()
+			// goroutine is waiting either to be awaken or shutdown.
+			t.awakenKeepalive <- struct{}{}
 		default:
 		}
 	}
@@ -477,6 +475,12 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
 	var (
 		endHeaders bool
 	)
+	if b := stats.OutgoingTags(ctx); b != nil {
+		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-tags-bin", Value: encodeBinHeader(b)})
+	}
+	if b := stats.OutgoingTrace(ctx); b != nil {
+		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-trace-bin", Value: encodeBinHeader(b)})
+	}
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
 		for k, vv := range md {
 			// HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set.
@@ -662,24 +666,6 @@ func (t *http2Client) GracefulClose() error {
 		t.mu.Unlock()
 		return nil
 	}
-	// Notify the streams which were initiated after the server sent GOAWAY.
-	select {
-	case <-t.goAway:
-		n := t.prevGoAwayID
-		if n == 0 && t.nextID > 1 {
-			n = t.nextID - 2
-		}
-		m := t.goAwayID + 2
-		if m == 2 {
-			m = 1
-		}
-		for i := m; i <= n; i += 2 {
-			if s, ok := t.activeStreams[i]; ok {
-				close(s.goAway)
-			}
-		}
-	default:
-	}
 	if t.state == draining {
 		t.mu.Unlock()
 		return nil
@@ -697,11 +683,22 @@ func (t *http2Client) GracefulClose() error {
 // should proceed only if Write returns nil.
 // TODO(zhaoq): opts.Delay is ignored in this implementation. Support it later
 // if it improves the performance.
-func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error {
-	r := bytes.NewBuffer(data)
+func (t *http2Client) Write(s *Stream, hdr []byte, data []byte, opts *Options) error {
+	secondStart := http2MaxFrameLen - len(hdr)%http2MaxFrameLen
+	if len(data) < secondStart {
+		secondStart = len(data)
+	}
+	hdr = append(hdr, data[:secondStart]...)
+	data = data[secondStart:]
+	isLastSlice := (len(data) == 0)
+	r := bytes.NewBuffer(hdr)
+	var (
+		p   []byte
+		oqv uint32
+	)
 	for {
-		var p []byte
-		if r.Len() > 0 {
+		oqv = atomic.LoadUint32(&t.outQuotaVersion)
+		if r.Len() > 0 || p != nil {
 			size := http2MaxFrameLen
 			// Wait until the stream has some quota to send the data.
 			sq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, s.sendQuotaPool.acquire())
@@ -719,7 +716,9 @@ func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error {
 			if tq < size {
 				size = tq
 			}
-			p = r.Next(size)
+			if p == nil {
+				p = r.Next(size)
+			}
 			ps := len(p)
 			if ps < sq {
 				// Overbooked stream quota. Return it back.
@@ -734,9 +733,6 @@ func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error {
 			endStream  bool
 			forceFlush bool
 		)
-		if opts.Last && r.Len() == 0 {
-			endStream = true
-		}
 		// Indicate there is a writer who is about to write a data frame.
 		t.framer.adjustNumWriters(1)
 		// Got some quota. Try to acquire writing privilege on the transport.
@@ -764,10 +760,34 @@ func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error {
 			return ContextErr(s.ctx.Err())
 		default:
 		}
-		if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 {
-			// Do a force flush iff this is last frame for the entire gRPC message
-			// and the caller is the only writer at this moment.
-			forceFlush = true
+		if oqv != atomic.LoadUint32(&t.outQuotaVersion) {
+			// InitialWindowSize settings frame must have been received after we
+			// acquired send quota but before we got the writable channel.
+			// We must forsake this write.
+			t.sendQuotaPool.add(len(p))
+			s.sendQuotaPool.add(len(p))
+			if t.framer.adjustNumWriters(-1) == 0 {
+				t.controlBuf.put(&flushIO{})
+			}
+			t.writableChan <- 0
+			continue
+		}
+		if r.Len() == 0 {
+			if isLastSlice {
+				if opts.Last {
+					endStream = true
+				}
+				if t.framer.adjustNumWriters(0) == 1 {
+					// Do a force flush iff this is last frame for the entire gRPC message
+					// and the caller is the only writer at this moment.
+					forceFlush = true
+				}
+			} else {
+				isLastSlice = true
+				if len(data) != 0 {
+					r = bytes.NewBuffer(data)
+				}
+			}
 		}
 		// If WriteData fails, all the pending streams will be handled
 		// by http2Client.Close(). No explicit CloseStream() needs to be
@@ -776,6 +796,7 @@ func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error {
 			t.notifyError(err)
 			return connectionErrorf(true, err, "transport: %v", err)
 		}
+		p = nil
 		if t.framer.adjustNumWriters(-1) == 0 {
 			t.framer.flushWrite()
 		}
@@ -955,7 +976,7 @@ func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) {
 		warningf("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error %v", f.ErrCode)
 		statusCode = codes.Unknown
 	}
-	s.finish(status.Newf(statusCode, "stream terminated by RST_STREAM with error code: %d", f.ErrCode))
+	s.finish(status.Newf(statusCode, "stream terminated by RST_STREAM with error code: %v", f.ErrCode))
 	s.mu.Unlock()
 	s.write(recvMsg{err: io.EOF})
 }
@@ -987,36 +1008,56 @@ func (t *http2Client) handlePing(f *http2.PingFrame) {
 }
 
 func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
+	t.mu.Lock()
+	if t.state != reachable && t.state != draining {
+		t.mu.Unlock()
+		return
+	}
 	if f.ErrCode == http2.ErrCodeEnhanceYourCalm {
 		infof("Client received GoAway with http2.ErrCodeEnhanceYourCalm.")
 	}
-	t.mu.Lock()
-	if t.state == reachable || t.state == draining {
-		if f.LastStreamID > 0 && f.LastStreamID%2 != 1 {
-			t.mu.Unlock()
-			t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: stream ID %d is even", f.LastStreamID))
-			return
-		}
-		select {
-		case <-t.goAway:
-			id := t.goAwayID
-			// t.goAway has been closed (i.e.,multiple GoAways).
-			if id < f.LastStreamID {
-				t.mu.Unlock()
-				t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: previously recv GOAWAY frame with LastStramID %d, currently recv %d", id, f.LastStreamID))
-				return
-			}
-			t.prevGoAwayID = id
-			t.goAwayID = f.LastStreamID
+	id := f.LastStreamID
+	if id > 0 && id%2 != 1 {
+		t.mu.Unlock()
+		t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: stream ID %d is even", f.LastStreamID))
+		return
+	}
+	// A client can recieve multiple GoAways from server (look at https://github.com/grpc/grpc-go/issues/1387).
+	// The idea is that the first GoAway will be sent with an ID of MaxInt32 and the second GoAway will be sent after an RTT delay
+	// with the ID of the last stream the server will process.
+	// Therefore, when we get the first GoAway we don't really close any streams. While in case of second GoAway we
+	// close all streams created after the second GoAwayId. This way streams that were in-flight while the GoAway from server
+	// was being sent don't get killed.
+	select {
+	case <-t.goAway: // t.goAway has been closed (i.e.,multiple GoAways).
+		// If there are multiple GoAways the first one should always have an ID greater than the following ones.
+		if id > t.prevGoAwayID {
 			t.mu.Unlock()
+			t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: previously recv GOAWAY frame with LastStramID %d, currently recv %d", id, f.LastStreamID))
 			return
-		default:
-			t.setGoAwayReason(f)
 		}
-		t.goAwayID = f.LastStreamID
+	default:
+		t.setGoAwayReason(f)
 		close(t.goAway)
+		t.state = draining
+	}
+	// All streams with IDs greater than the GoAwayId
+	// and smaller than the previous GoAway ID should be killed.
+	upperLimit := t.prevGoAwayID
+	if upperLimit == 0 { // This is the first GoAway Frame.
+		upperLimit = math.MaxUint32 // Kill all streams after the GoAway ID.
 	}
+	for streamID, stream := range t.activeStreams {
+		if streamID > id && streamID <= upperLimit {
+			close(stream.goAway)
+		}
+	}
+	t.prevGoAwayID = id
+	active := len(t.activeStreams)
 	t.mu.Unlock()
+	if active == 0 {
+		t.Close()
+	}
 }
 
 // setGoAwayReason sets the value of t.goAwayReason based
@@ -1216,6 +1257,7 @@ func (t *http2Client) applySettings(ss []http2.Setting) {
 			}
 			t.streamSendQuota = s.Val
 			t.mu.Unlock()
+			atomic.AddUint32(&t.outQuotaVersion, 1)
 		}
 	}
 }

cmd/vendor/google.golang.org/grpc/transport/http2_server.go

@@ -68,7 +68,6 @@ type http2Server struct {
 	framer       *framer
 	hBuf         *bytes.Buffer  // the buffer for HPACK encoding
 	hEnc         *hpack.Encoder // HPACK encoder
-
 	// The max number of concurrent streams.
 	maxStreams uint32
 	// controlBuf delivers all the control related tasks (e.g., window
@@ -77,9 +76,7 @@ type http2Server struct {
 	fc         *inFlow
 	// sendQuotaPool provides flow control to outbound message.
 	sendQuotaPool *quotaPool
-
-	stats stats.Handler
-
+	stats         stats.Handler
 	// Flag to keep track of reading activity on transport.
 	// 1 is true and 0 is false.
 	activity uint32 // Accessed atomically.
@@ -95,13 +92,21 @@ type http2Server struct {
 	// Flag to signify that number of ping strikes should be reset to 0.
 	// This is set whenever data or header frames are sent.
 	// 1 means yes.
-	resetPingStrikes uint32 // Accessed atomically.
-
+	resetPingStrikes  uint32 // Accessed atomically.
 	initialWindowSize int32
+	bdpEst            *bdpEstimator
 
-	bdpEst *bdpEstimator
+	outQuotaVersion uint32
 
-	mu            sync.Mutex // guard the following
+	mu sync.Mutex // guard the following
+
+	// drainChan is initialized when drain(...) is called the first time.
+	// After which the server writes out the first GoAway(with ID 2^31-1) frame.
+	// Then an independent goroutine will be launched to later send the second GoAway.
+	// During this time we don't want to write another first GoAway(with ID 2^31 -1) frame.
+	// Thus call to drain(...) will be a no-op if drainChan is already initialized since draining is
+	// already underway.
+	drainChan     chan struct{}
 	state         transportState
 	activeStreams map[uint32]*Stream
 	// the per-stream outbound flow control window size set by the peer.
@@ -225,29 +230,32 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
 
 // operateHeader takes action on the decoded headers.
 func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(*Stream), traceCtx func(context.Context, string) context.Context) (close bool) {
-	buf := newRecvBuffer()
-	s := &Stream{
-		id:  frame.Header().StreamID,
-		st:  t,
-		buf: buf,
-		fc:  &inFlow{limit: uint32(t.initialWindowSize)},
-	}
+	streamID := frame.Header().StreamID
 
 	var state decodeState
 	for _, hf := range frame.Fields {
 		if err := state.processHeaderField(hf); err != nil {
 			if se, ok := err.(StreamError); ok {
-				t.controlBuf.put(&resetStream{s.id, statusCodeConvTab[se.Code]})
+				t.controlBuf.put(&resetStream{streamID, statusCodeConvTab[se.Code]})
 			}
 			return
 		}
 	}
 
+	buf := newRecvBuffer()
+	s := &Stream{
+		id:           streamID,
+		st:           t,
+		buf:          buf,
+		fc:           &inFlow{limit: uint32(t.initialWindowSize)},
+		recvCompress: state.encoding,
+		method:       state.method,
+	}
+
 	if frame.StreamEnded() {
 		// s is just created by the caller. No lock needed.
 		s.state = streamReadDone
 	}
-	s.recvCompress = state.encoding
 	if state.timeoutSet {
 		s.ctx, s.cancel = context.WithTimeout(t.ctx, state.timeout)
 	} else {
@@ -269,17 +277,12 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 	if len(state.mdata) > 0 {
 		s.ctx = metadata.NewIncomingContext(s.ctx, state.mdata)
 	}
-	s.trReader = &transportReader{
-		reader: &recvBufferReader{
-			ctx:  s.ctx,
-			recv: s.buf,
-		},
-		windowHandler: func(n int) {
-			t.updateWindow(s, uint32(n))
-		},
+	if state.statsTags != nil {
+		s.ctx = stats.SetIncomingTags(s.ctx, state.statsTags)
+	}
+	if state.statsTrace != nil {
+		s.ctx = stats.SetIncomingTrace(s.ctx, state.statsTrace)
 	}
-	s.recvCompress = state.encoding
-	s.method = state.method
 	if t.inTapHandle != nil {
 		var err error
 		info := &tap.Info{
@@ -299,18 +302,18 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 	}
 	if uint32(len(t.activeStreams)) >= t.maxStreams {
 		t.mu.Unlock()
-		t.controlBuf.put(&resetStream{s.id, http2.ErrCodeRefusedStream})
+		t.controlBuf.put(&resetStream{streamID, http2.ErrCodeRefusedStream})
 		return
 	}
-	if s.id%2 != 1 || s.id <= t.maxStreamID {
+	if streamID%2 != 1 || streamID <= t.maxStreamID {
 		t.mu.Unlock()
 		// illegal gRPC stream id.
-		errorf("transport: http2Server.HandleStreams received an illegal stream id: %v", s.id)
+		errorf("transport: http2Server.HandleStreams received an illegal stream id: %v", streamID)
 		return true
 	}
-	t.maxStreamID = s.id
+	t.maxStreamID = streamID
 	s.sendQuotaPool = newQuotaPool(int(t.streamSendQuota))
-	t.activeStreams[s.id] = s
+	t.activeStreams[streamID] = s
 	if len(t.activeStreams) == 1 {
 		t.idle = time.Time{}
 	}
@@ -330,6 +333,15 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 		}
 		t.stats.HandleRPC(s.ctx, inHeader)
 	}
+	s.trReader = &transportReader{
+		reader: &recvBufferReader{
+			ctx:  s.ctx,
+			recv: s.buf,
+		},
+		windowHandler: func(n int) {
+			t.updateWindow(s, uint32(n))
+		},
+	}
 	handle(s)
 	return
 }
@@ -592,6 +604,10 @@ const (
 
 func (t *http2Server) handlePing(f *http2.PingFrame) {
 	if f.IsAck() {
+		if f.Data == goAwayPing.data && t.drainChan != nil {
+			close(t.drainChan)
+			return
+		}
 		// Maybe it's a BDP ping.
 		if t.bdpEst != nil {
 			t.bdpEst.calculate(f.Data)
@@ -631,7 +647,7 @@ func (t *http2Server) handlePing(f *http2.PingFrame) {
 
 	if t.pingStrikes > maxPingStrikes {
 		// Send goaway and close the connection.
-		t.controlBuf.put(&goAway{code: http2.ErrCodeEnhanceYourCalm, debugData: []byte("too_many_pings")})
+		t.controlBuf.put(&goAway{code: http2.ErrCodeEnhanceYourCalm, debugData: []byte("too_many_pings"), closeConn: true})
 	}
 }
 
@@ -759,8 +775,13 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
 		headersSent = true
 	}
 
-	if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
-		return err
+	// Always write a status regardless of context cancellation unless the stream
+	// is terminated (e.g. by a RST_STREAM, GOAWAY, or transport error).  The
+	// server's application code is already done so it is fine to ignore s.ctx.
+	select {
+	case <-t.shutdownChan:
+		return ErrConnClosing
+	case <-t.writableChan:
 	}
 	t.hBuf.Reset()
 	if !headersSent {
@@ -812,8 +833,15 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
 
 // Write converts the data into HTTP2 data frame and sends it out. Non-nil error
 // is returns if it fails (e.g., framing error, transport error).
-func (t *http2Server) Write(s *Stream, data []byte, opts *Options) (err error) {
+func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) (err error) {
 	// TODO(zhaoq): Support multi-writers for a single stream.
+	secondStart := http2MaxFrameLen - len(hdr)%http2MaxFrameLen
+	if len(data) < secondStart {
+		secondStart = len(data)
+	}
+	hdr = append(hdr, data[:secondStart]...)
+	data = data[secondStart:]
+	isLastSlice := (len(data) == 0)
 	var writeHeaderFrame bool
 	s.mu.Lock()
 	if s.state == streamDone {
@@ -827,11 +855,16 @@ func (t *http2Server) Write(s *Stream, data []byte, opts *Options) (err error) {
 	if writeHeaderFrame {
 		t.WriteHeader(s, nil)
 	}
-	r := bytes.NewBuffer(data)
+	r := bytes.NewBuffer(hdr)
+	var (
+		p   []byte
+		oqv uint32
+	)
 	for {
-		if r.Len() == 0 {
+		if r.Len() == 0 && p == nil {
 			return nil
 		}
+		oqv = atomic.LoadUint32(&t.outQuotaVersion)
 		size := http2MaxFrameLen
 		// Wait until the stream has some quota to send the data.
 		sq, err := wait(s.ctx, nil, nil, t.shutdownChan, s.sendQuotaPool.acquire())
@@ -849,7 +882,9 @@ func (t *http2Server) Write(s *Stream, data []byte, opts *Options) (err error) {
 		if tq < size {
 			size = tq
 		}
-		p := r.Next(size)
+		if p == nil {
+			p = r.Next(size)
+		}
 		ps := len(p)
 		if ps < sq {
 			// Overbooked stream quota. Return it back.
@@ -886,9 +921,28 @@ func (t *http2Server) Write(s *Stream, data []byte, opts *Options) (err error) {
 			return ContextErr(s.ctx.Err())
 		default:
 		}
+		if oqv != atomic.LoadUint32(&t.outQuotaVersion) {
+			// InitialWindowSize settings frame must have been received after we
+			// acquired send quota but before we got the writable channel.
+			// We must forsake this write.
+			t.sendQuotaPool.add(ps)
+			s.sendQuotaPool.add(ps)
+			if t.framer.adjustNumWriters(-1) == 0 {
+				t.controlBuf.put(&flushIO{})
+			}
+			t.writableChan <- 0
+			continue
+		}
 		var forceFlush bool
-		if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 && !opts.Last {
-			forceFlush = true
+		if r.Len() == 0 {
+			if isLastSlice {
+				if t.framer.adjustNumWriters(0) == 1 && !opts.Last {
+					forceFlush = true
+				}
+			} else {
+				r = bytes.NewBuffer(data)
+				isLastSlice = true
+			}
 		}
 		// Reset ping strikes when sending data since this might cause
 		// the peer to send ping.
@@ -897,6 +951,7 @@ func (t *http2Server) Write(s *Stream, data []byte, opts *Options) (err error) {
 			t.Close()
 			return connectionErrorf(true, err, "transport: %v", err)
 		}
+		p = nil
 		if t.framer.adjustNumWriters(-1) == 0 {
 			t.framer.flushWrite()
 		}
@@ -914,6 +969,7 @@ func (t *http2Server) applySettings(ss []http2.Setting) {
 				stream.sendQuotaPool.add(int(s.Val) - int(t.streamSendQuota))
 			}
 			t.streamSendQuota = s.Val
+			atomic.AddUint32(&t.outQuotaVersion, 1)
 		}
 
 	}
@@ -923,7 +979,7 @@ func (t *http2Server) applySettings(ss []http2.Setting) {
 // 1. Gracefully closes an idle connection after a duration of keepalive.MaxConnectionIdle.
 // 2. Gracefully closes any connection after a duration of keepalive.MaxConnectionAge.
 // 3. Forcibly closes a connection after an additive period of keepalive.MaxConnectionAgeGrace over keepalive.MaxConnectionAge.
-// 4. Makes sure a connection is alive by sending pings with a frequency of keepalive.Time and closes a non-resposive connection
+// 4. Makes sure a connection is alive by sending pings with a frequency of keepalive.Time and closes a non-responsive connection
 // after an additional duration of keepalive.Timeout.
 func (t *http2Server) keepalive() {
 	p := &ping{}
@@ -956,23 +1012,18 @@ func (t *http2Server) keepalive() {
 				continue
 			}
 			val := t.kp.MaxConnectionIdle - time.Since(idle)
+			t.mu.Unlock()
 			if val <= 0 {
 				// The connection has been idle for a duration of keepalive.MaxConnectionIdle or more.
 				// Gracefully close the connection.
-				t.state = draining
-				t.mu.Unlock()
-				t.Drain()
+				t.drain(http2.ErrCodeNo, []byte{})
 				// Reseting the timer so that the clean-up doesn't deadlock.
 				maxIdle.Reset(infinity)
 				return
 			}
-			t.mu.Unlock()
 			maxIdle.Reset(val)
 		case <-maxAge.C:
-			t.mu.Lock()
-			t.state = draining
-			t.mu.Unlock()
-			t.Drain()
+			t.drain(http2.ErrCodeNo, []byte{})
 			maxAge.Reset(t.kp.MaxConnectionAgeGrace)
 			select {
 			case <-maxAge.C:
@@ -1004,6 +1055,8 @@ func (t *http2Server) keepalive() {
 	}
 }
 
+var goAwayPing = &ping{data: [8]byte{1, 6, 1, 8, 0, 3, 3, 9}}
+
 // controller running in a separate goroutine takes charge of sending control
 // frames (e.g., window update, reset stream, setting, etc.) to the server.
 func (t *http2Server) controller() {
@@ -1033,12 +1086,39 @@ func (t *http2Server) controller() {
 						return
 					}
 					sid := t.maxStreamID
-					t.state = draining
-					t.mu.Unlock()
-					t.framer.writeGoAway(true, sid, i.code, i.debugData)
-					if i.code == http2.ErrCodeEnhanceYourCalm {
-						t.Close()
+					if !i.headsUp {
+						// Stop accepting more streams now.
+						t.state = draining
+						activeStreams := len(t.activeStreams)
+						t.mu.Unlock()
+						t.framer.writeGoAway(true, sid, i.code, i.debugData)
+						if i.closeConn || activeStreams == 0 {
+							// Abruptly close the connection following the GoAway.
+							t.Close()
+						}
+						t.writableChan <- 0
+						continue
 					}
+					t.mu.Unlock()
+					// For a graceful close, send out a GoAway with stream ID of MaxUInt32,
+					// Follow that with a ping and wait for the ack to come back or a timer
+					// to expire. During this time accept new streams since they might have
+					// originated before the GoAway reaches the client.
+					// After getting the ack or timer expiration send out another GoAway this
+					// time with an ID of the max stream server intends to process.
+					t.framer.writeGoAway(true, math.MaxUint32, http2.ErrCodeNo, []byte{})
+					t.framer.writePing(true, false, goAwayPing.data)
+					go func() {
+						timer := time.NewTimer(time.Minute)
+						defer timer.Stop()
+						select {
+						case <-t.drainChan:
+						case <-timer.C:
+						case <-t.shutdownChan:
+							return
+						}
+						t.controlBuf.put(&goAway{code: i.code, debugData: i.debugData})
+					}()
 				case *flushIO:
 					t.framer.flushWrite()
 				case *ping:
@@ -1116,7 +1196,17 @@ func (t *http2Server) RemoteAddr() net.Addr {
 }
 
 func (t *http2Server) Drain() {
-	t.controlBuf.put(&goAway{code: http2.ErrCodeNo})
+	t.drain(http2.ErrCodeNo, []byte{})
+}
+
+func (t *http2Server) drain(code http2.ErrCode, debugData []byte) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	if t.drainChan != nil {
+		return
+	}
+	t.drainChan = make(chan struct{})
+	t.controlBuf.put(&goAway{code: code, debugData: debugData, headsUp: true})
 }
 
 var rgen = rand.New(rand.NewSource(time.Now().UnixNano()))

cmd/vendor/google.golang.org/grpc/transport/http_util.go

@@ -111,7 +111,9 @@ type decodeState struct {
 	timeout    time.Duration
 	method     string
 	// key-value metadata map from the peer.
-	mdata map[string][]string
+	mdata      map[string][]string
+	statsTags  []byte
+	statsTrace []byte
 }
 
 // isReservedHeader checks whether hdr belongs to HTTP2 headers
@@ -235,6 +237,13 @@ func (d *decodeState) decodeResponseHeader(frame *http2.MetaHeadersFrame) error
 
 }
 
+func (d *decodeState) addMetadata(k, v string) {
+	if d.mdata == nil {
+		d.mdata = make(map[string][]string)
+	}
+	d.mdata[k] = append(d.mdata[k], v)
+}
+
 func (d *decodeState) processHeaderField(f hpack.HeaderField) error {
 	switch f.Name {
 	case "content-type":
@@ -275,18 +284,30 @@ func (d *decodeState) processHeaderField(f hpack.HeaderField) error {
 			return streamErrorf(codes.Internal, "transport: malformed http-status: %v", err)
 		}
 		d.httpStatus = &code
+	case "grpc-tags-bin":
+		v, err := decodeBinHeader(f.Value)
+		if err != nil {
+			return streamErrorf(codes.Internal, "transport: malformed grpc-tags-bin: %v", err)
+		}
+		d.statsTags = v
+		d.addMetadata(f.Name, string(v))
+	case "grpc-trace-bin":
+		v, err := decodeBinHeader(f.Value)
+		if err != nil {
+			return streamErrorf(codes.Internal, "transport: malformed grpc-trace-bin: %v", err)
+		}
+		d.statsTrace = v
+		d.addMetadata(f.Name, string(v))
 	default:
-		if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) {
-			if d.mdata == nil {
-				d.mdata = make(map[string][]string)
-			}
-			v, err := decodeMetadataHeader(f.Name, f.Value)
-			if err != nil {
-				errorf("Failed to decode metadata header (%q, %q): %v", f.Name, f.Value, err)
-				return nil
-			}
-			d.mdata[f.Name] = append(d.mdata[f.Name], v)
+		if isReservedHeader(f.Name) && !isWhitelistedPseudoHeader(f.Name) {
+			break
+		}
+		v, err := decodeMetadataHeader(f.Name, f.Value)
+		if err != nil {
+			errorf("Failed to decode metadata header (%q, %q): %v", f.Name, f.Value, err)
+			return nil
 		}
+		d.addMetadata(f.Name, string(v))
 	}
 	return nil
 }

cmd/vendor/google.golang.org/grpc/transport/transport.go

@@ -116,7 +116,11 @@ func (r *recvBufferReader) Read(p []byte) (n int, err error) {
 	if r.err != nil {
 		return 0, r.err
 	}
-	defer func() { r.err = err }()
+	n, r.err = r.read(p)
+	return n, r.err
+}
+
+func (r *recvBufferReader) read(p []byte) (n int, err error) {
 	if r.last != nil && len(r.last) > 0 {
 		// Read remaining data left in last call.
 		copied := copy(p, r.last)
@@ -560,7 +564,7 @@ type ClientTransport interface {
 
 	// Write sends the data for the given stream. A nil stream indicates
 	// the write is to be performed on the transport as a whole.
-	Write(s *Stream, data []byte, opts *Options) error
+	Write(s *Stream, hdr []byte, data []byte, opts *Options) error
 
 	// NewStream creates a Stream for an RPC.
 	NewStream(ctx context.Context, callHdr *CallHdr) (*Stream, error)
@@ -602,7 +606,7 @@ type ServerTransport interface {
 
 	// Write sends the data for the given stream.
 	// Write may not be called on all streams.
-	Write(s *Stream, data []byte, opts *Options) error
+	Write(s *Stream, hdr []byte, data []byte, opts *Options) error
 
 	// WriteStatus sends the status of a stream to the client.  WriteStatus is
 	// the final call made on a stream and always occurs.

glide.lock

@@ -1,5 +1,5 @@
-hash: 2741432e90b78701658bb5aea14c6a43d1e57d6f2f111e16398f8ce5af500e54
-updated: 2017-09-27T15:28:21.693058-07:00
+hash: c9112594e510eb16840a825117ac0945777d4ac56ce4dcde5fa76cd7a1c130d5
+updated: 2017-09-28T13:34:20.16956-07:00
 imports:
 - name: github.com/beorn7/perks
   version: 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
@@ -47,8 +47,11 @@ imports:
   subpackages:
   - jsonpb
   - proto
+  - ptypes
   - ptypes/any
+  - ptypes/duration
   - ptypes/struct
+  - ptypes/timestamp
 - name: github.com/google/btree
   version: 925471ac9e2131377a91e1595defec898166fe49
 - name: github.com/grpc-ecosystem/go-grpc-prometheus
@@ -144,11 +147,12 @@ imports:
   subpackages:
   - googleapis/rpc/status
 - name: google.golang.org/grpc
-  version: b8669c35455183da6d5c474ea6e72fbf55183274
+  version: f92cdcd7dcdc69e81b2d7b338479a19a8723cfa3
   subpackages:
   - codes
+  - connectivity
   - credentials
-  - grpclb/grpc_lb_v1
+  - grpclb/grpc_lb_v1/messages
   - grpclog
   - health
   - health/grpc_health_v1

glide.yaml

@@ -97,7 +97,7 @@ import:
   subpackages:
   - rate
 - package: google.golang.org/grpc
-  version: v1.5.1
+  version: v1.6.0
   subpackages:
   - codes
   - credentials