[VOL-4442] grpc streaming connection monitoring
Change-Id: I435a03fdc0ac2b549dc4512220148cb19c16db19
diff --git a/vendor/github.com/jhump/protoreflect/codec/decode_fields.go b/vendor/github.com/jhump/protoreflect/codec/decode_fields.go
new file mode 100644
index 0000000..02f8a32
--- /dev/null
+++ b/vendor/github.com/jhump/protoreflect/codec/decode_fields.go
@@ -0,0 +1,318 @@
+package codec
+
+import (
+ "errors"
+ "fmt"
+ "io"
+ "math"
+
+ "github.com/golang/protobuf/proto"
+ "github.com/golang/protobuf/protoc-gen-go/descriptor"
+
+ "github.com/jhump/protoreflect/desc"
+)
+
+var varintTypes = map[descriptor.FieldDescriptorProto_Type]bool{}
+var fixed32Types = map[descriptor.FieldDescriptorProto_Type]bool{}
+var fixed64Types = map[descriptor.FieldDescriptorProto_Type]bool{}
+
+func init() {
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_BOOL] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_INT32] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_INT64] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_UINT32] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_UINT64] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_SINT32] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_SINT64] = true
+ varintTypes[descriptor.FieldDescriptorProto_TYPE_ENUM] = true
+
+ fixed32Types[descriptor.FieldDescriptorProto_TYPE_FIXED32] = true
+ fixed32Types[descriptor.FieldDescriptorProto_TYPE_SFIXED32] = true
+ fixed32Types[descriptor.FieldDescriptorProto_TYPE_FLOAT] = true
+
+ fixed64Types[descriptor.FieldDescriptorProto_TYPE_FIXED64] = true
+ fixed64Types[descriptor.FieldDescriptorProto_TYPE_SFIXED64] = true
+ fixed64Types[descriptor.FieldDescriptorProto_TYPE_DOUBLE] = true
+}
+
+// ErrWireTypeEndGroup is returned from DecodeFieldValue if the tag and wire-type
+// it reads indicates an end-group marker.
+var ErrWireTypeEndGroup = errors.New("unexpected wire type: end group")
+
+// MessageFactory is used to instantiate messages when DecodeFieldValue needs to
+// decode a message value.
+//
+// Also see MessageFactory in "github.com/jhump/protoreflect/dynamic", which
+// implements this interface.
+type MessageFactory interface {
+ NewMessage(md *desc.MessageDescriptor) proto.Message
+}
+
+// UnknownField represents a field that was parsed from the binary wire
+// format for a message, but was not a recognized field number. Enough
+// information is preserved so that re-serializing the message won't lose
+// any of the unrecognized data.
+type UnknownField struct {
+ // The tag number for the unrecognized field.
+ Tag int32
+
+ // Encoding indicates how the unknown field was encoded on the wire. If it
+ // is proto.WireBytes or proto.WireGroupStart then Contents will be set to
+ // the raw bytes. If it is proto.WireTypeFixed32 then the data is in the least
+ // significant 32 bits of Value. Otherwise, the data is in all 64 bits of
+ // Value.
+ Encoding int8
+ Contents []byte
+ Value uint64
+}
+
+// DecodeZigZag32 decodes a signed 32-bit integer from the given
+// zig-zag encoded value.
+func DecodeZigZag32(v uint64) int32 {
+ return int32((uint32(v) >> 1) ^ uint32((int32(v&1)<<31)>>31))
+}
+
+// DecodeZigZag64 decodes a signed 64-bit integer from the given
+// zig-zag encoded value.
+func DecodeZigZag64(v uint64) int64 {
+ return int64((v >> 1) ^ uint64((int64(v&1)<<63)>>63))
+}
+
+// DecodeFieldValue will read a field value from the buffer and return its
+// value and the corresponding field descriptor. The given function is used
+// to lookup a field descriptor by tag number. The given factory is used to
+// instantiate a message if the field value is (or contains) a message value.
+//
+// On error, the field descriptor and value are typically nil. However, if the
+// error returned is ErrWireTypeEndGroup, the returned value will indicate any
+// tag number encoded in the end-group marker.
+//
+// If the field descriptor returned is nil, that means that the given function
+// returned nil. This is expected to happen for unrecognized tag numbers. In
+// that case, no error is returned, and the value will be an UnknownField.
+func (cb *Buffer) DecodeFieldValue(fieldFinder func(int32) *desc.FieldDescriptor, fact MessageFactory) (*desc.FieldDescriptor, interface{}, error) {
+ if cb.EOF() {
+ return nil, nil, io.EOF
+ }
+ tagNumber, wireType, err := cb.DecodeTagAndWireType()
+ if err != nil {
+ return nil, nil, err
+ }
+ if wireType == proto.WireEndGroup {
+ return nil, tagNumber, ErrWireTypeEndGroup
+ }
+ fd := fieldFinder(tagNumber)
+ if fd == nil {
+ val, err := cb.decodeUnknownField(tagNumber, wireType)
+ return nil, val, err
+ }
+ val, err := cb.decodeKnownField(fd, wireType, fact)
+ return fd, val, err
+}
+
+// DecodeScalarField extracts a properly-typed value from v. The returned value's
+// type depends on the given field descriptor type. It will be the same type as
+// generated structs use for the field descriptor's type. Enum types will return
+// an int32. If the given field type uses length-delimited encoding (nested
+// messages, bytes, and strings), an error is returned.
+func DecodeScalarField(fd *desc.FieldDescriptor, v uint64) (interface{}, error) {
+ switch fd.GetType() {
+ case descriptor.FieldDescriptorProto_TYPE_BOOL:
+ return v != 0, nil
+ case descriptor.FieldDescriptorProto_TYPE_UINT32,
+ descriptor.FieldDescriptorProto_TYPE_FIXED32:
+ if v > math.MaxUint32 {
+ return nil, ErrOverflow
+ }
+ return uint32(v), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_INT32,
+ descriptor.FieldDescriptorProto_TYPE_ENUM:
+ s := int64(v)
+ if s > math.MaxInt32 || s < math.MinInt32 {
+ return nil, ErrOverflow
+ }
+ return int32(s), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_SFIXED32:
+ if v > math.MaxUint32 {
+ return nil, ErrOverflow
+ }
+ return int32(v), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_SINT32:
+ if v > math.MaxUint32 {
+ return nil, ErrOverflow
+ }
+ return DecodeZigZag32(v), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_UINT64,
+ descriptor.FieldDescriptorProto_TYPE_FIXED64:
+ return v, nil
+
+ case descriptor.FieldDescriptorProto_TYPE_INT64,
+ descriptor.FieldDescriptorProto_TYPE_SFIXED64:
+ return int64(v), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_SINT64:
+ return DecodeZigZag64(v), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_FLOAT:
+ if v > math.MaxUint32 {
+ return nil, ErrOverflow
+ }
+ return math.Float32frombits(uint32(v)), nil
+
+ case descriptor.FieldDescriptorProto_TYPE_DOUBLE:
+ return math.Float64frombits(v), nil
+
+ default:
+ // bytes, string, message, and group cannot be represented as a simple numeric value
+ return nil, fmt.Errorf("bad input; field %s requires length-delimited wire type", fd.GetFullyQualifiedName())
+ }
+}
+
+// DecodeLengthDelimitedField extracts a properly-typed value from bytes. The
+// returned value's type will usually be []byte, string, or, for nested messages,
+// the type returned from the given message factory. However, since repeated
+// scalar fields can be length-delimited, when they used packed encoding, it can
+// also return an []interface{}, where each element is a scalar value. Furthermore,
+// it could return a scalar type, not in a slice, if the given field descriptor is
+// not repeated. This is to support cases where a field is changed from optional
+// to repeated. New code may emit a packed repeated representation, but old code
+// still expects a single scalar value. In this case, if the actual data in bytes
+// contains multiple values, only the last value is returned.
+func DecodeLengthDelimitedField(fd *desc.FieldDescriptor, bytes []byte, mf MessageFactory) (interface{}, error) {
+ switch {
+ case fd.GetType() == descriptor.FieldDescriptorProto_TYPE_BYTES:
+ return bytes, nil
+
+ case fd.GetType() == descriptor.FieldDescriptorProto_TYPE_STRING:
+ return string(bytes), nil
+
+ case fd.GetType() == descriptor.FieldDescriptorProto_TYPE_MESSAGE ||
+ fd.GetType() == descriptor.FieldDescriptorProto_TYPE_GROUP:
+ msg := mf.NewMessage(fd.GetMessageType())
+ err := proto.Unmarshal(bytes, msg)
+ if err != nil {
+ return nil, err
+ } else {
+ return msg, nil
+ }
+
+ default:
+ // even if the field is not repeated or not packed, we still parse it as such for
+ // backwards compatibility (e.g. message we are de-serializing could have been both
+ // repeated and packed at the time of serialization)
+ packedBuf := NewBuffer(bytes)
+ var slice []interface{}
+ var val interface{}
+ for !packedBuf.EOF() {
+ var v uint64
+ var err error
+ if varintTypes[fd.GetType()] {
+ v, err = packedBuf.DecodeVarint()
+ } else if fixed32Types[fd.GetType()] {
+ v, err = packedBuf.DecodeFixed32()
+ } else if fixed64Types[fd.GetType()] {
+ v, err = packedBuf.DecodeFixed64()
+ } else {
+ return nil, fmt.Errorf("bad input; cannot parse length-delimited wire type for field %s", fd.GetFullyQualifiedName())
+ }
+ if err != nil {
+ return nil, err
+ }
+ val, err = DecodeScalarField(fd, v)
+ if err != nil {
+ return nil, err
+ }
+ if fd.IsRepeated() {
+ slice = append(slice, val)
+ }
+ }
+ if fd.IsRepeated() {
+ return slice, nil
+ } else {
+ // if not a repeated field, last value wins
+ return val, nil
+ }
+ }
+}
+
+func (b *Buffer) decodeKnownField(fd *desc.FieldDescriptor, encoding int8, fact MessageFactory) (interface{}, error) {
+ var val interface{}
+ var err error
+ switch encoding {
+ case proto.WireFixed32:
+ var num uint64
+ num, err = b.DecodeFixed32()
+ if err == nil {
+ val, err = DecodeScalarField(fd, num)
+ }
+ case proto.WireFixed64:
+ var num uint64
+ num, err = b.DecodeFixed64()
+ if err == nil {
+ val, err = DecodeScalarField(fd, num)
+ }
+ case proto.WireVarint:
+ var num uint64
+ num, err = b.DecodeVarint()
+ if err == nil {
+ val, err = DecodeScalarField(fd, num)
+ }
+
+ case proto.WireBytes:
+ alloc := fd.GetType() == descriptor.FieldDescriptorProto_TYPE_BYTES
+ var raw []byte
+ raw, err = b.DecodeRawBytes(alloc)
+ if err == nil {
+ val, err = DecodeLengthDelimitedField(fd, raw, fact)
+ }
+
+ case proto.WireStartGroup:
+ if fd.GetMessageType() == nil {
+ return nil, fmt.Errorf("cannot parse field %s from group-encoded wire type", fd.GetFullyQualifiedName())
+ }
+ msg := fact.NewMessage(fd.GetMessageType())
+ var data []byte
+ data, err = b.ReadGroup(false)
+ if err == nil {
+ err = proto.Unmarshal(data, msg)
+ if err == nil {
+ val = msg
+ }
+ }
+
+ default:
+ return nil, ErrBadWireType
+ }
+ if err != nil {
+ return nil, err
+ }
+
+ return val, nil
+}
+
+func (b *Buffer) decodeUnknownField(tagNumber int32, encoding int8) (interface{}, error) {
+ u := UnknownField{Tag: tagNumber, Encoding: encoding}
+ var err error
+ switch encoding {
+ case proto.WireFixed32:
+ u.Value, err = b.DecodeFixed32()
+ case proto.WireFixed64:
+ u.Value, err = b.DecodeFixed64()
+ case proto.WireVarint:
+ u.Value, err = b.DecodeVarint()
+ case proto.WireBytes:
+ u.Contents, err = b.DecodeRawBytes(true)
+ case proto.WireStartGroup:
+ u.Contents, err = b.ReadGroup(true)
+ default:
+ err = ErrBadWireType
+ }
+ if err != nil {
+ return nil, err
+ }
+ return u, nil
+}