1// Copyright 2019 The gRPC Authors 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package http2interop 16 17import ( 18 "fmt" 19 "io" 20) 21 22type PingFrame struct { 23 Header FrameHeader 24 Data []byte 25} 26 27const ( 28 PING_ACK = 0x01 29) 30 31func (f *PingFrame) GetHeader() *FrameHeader { 32 return &f.Header 33} 34 35func (f *PingFrame) ParsePayload(r io.Reader) error { 36 raw := make([]byte, f.Header.Length) 37 if _, err := io.ReadFull(r, raw); err != nil { 38 return err 39 } 40 return f.UnmarshalPayload(raw) 41} 42 43func (f *PingFrame) UnmarshalPayload(raw []byte) error { 44 if f.Header.Length != len(raw) { 45 return fmt.Errorf("Invalid Payload length %d != %d", f.Header.Length, len(raw)) 46 } 47 if f.Header.Length != 8 { 48 return fmt.Errorf("Invalid Payload length %d", f.Header.Length) 49 } 50 51 f.Data = []byte(string(raw)) 52 53 return nil 54} 55 56func (f *PingFrame) MarshalPayload() ([]byte, error) { 57 if len(f.Data) != 8 { 58 return nil, fmt.Errorf("Invalid Payload length %d", len(f.Data)) 59 } 60 return []byte(string(f.Data)), nil 61} 62 63func (f *PingFrame) MarshalBinary() ([]byte, error) { 64 payload, err := f.MarshalPayload() 65 if err != nil { 66 return nil, err 67 } 68 69 f.Header.Length = len(payload) 70 f.Header.Type = PingFrameType 71 header, err := f.Header.MarshalBinary() 72 if err != nil { 73 return nil, err 74 } 75 76 header = append(header, payload...) 77 78 return header, nil 79} 80