mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
e8381db778
* Update Kubernetes to v1.21.0 * Update to golang v1.16.2 * Update dependent modules to track with upstream * Switch to upstream flannel * Track changes to upstream cloud-controller-manager and FeatureGates Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
335 lines
8.5 KiB
Go
335 lines
8.5 KiB
Go
/*
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Copyright 2014-2021 Docker Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package spdy
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import (
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"encoding/binary"
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"io"
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"net/http"
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"strings"
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)
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func (frame *SynStreamFrame) write(f *Framer) error {
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return f.writeSynStreamFrame(frame)
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}
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func (frame *SynReplyFrame) write(f *Framer) error {
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return f.writeSynReplyFrame(frame)
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}
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func (frame *RstStreamFrame) write(f *Framer) (err error) {
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if frame.StreamId == 0 {
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return &Error{ZeroStreamId, 0}
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}
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeRstStream
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frame.CFHeader.Flags = 0
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frame.CFHeader.length = 8
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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if frame.Status == 0 {
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return &Error{InvalidControlFrame, frame.StreamId}
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.Status); err != nil {
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return
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}
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return
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}
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func (frame *SettingsFrame) write(f *Framer) (err error) {
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeSettings
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frame.CFHeader.length = uint32(len(frame.FlagIdValues)*8 + 4)
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, uint32(len(frame.FlagIdValues))); err != nil {
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return
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}
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for _, flagIdValue := range frame.FlagIdValues {
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flagId := uint32(flagIdValue.Flag)<<24 | uint32(flagIdValue.Id)
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if err = binary.Write(f.w, binary.BigEndian, flagId); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, flagIdValue.Value); err != nil {
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return
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}
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}
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return
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}
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func (frame *PingFrame) write(f *Framer) (err error) {
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if frame.Id == 0 {
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return &Error{ZeroStreamId, 0}
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}
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypePing
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frame.CFHeader.Flags = 0
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frame.CFHeader.length = 4
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.Id); err != nil {
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return
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}
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return
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}
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func (frame *GoAwayFrame) write(f *Framer) (err error) {
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeGoAway
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frame.CFHeader.Flags = 0
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frame.CFHeader.length = 8
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.LastGoodStreamId); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.Status); err != nil {
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return
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}
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return nil
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}
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func (frame *HeadersFrame) write(f *Framer) error {
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return f.writeHeadersFrame(frame)
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}
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func (frame *WindowUpdateFrame) write(f *Framer) (err error) {
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeWindowUpdate
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frame.CFHeader.Flags = 0
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frame.CFHeader.length = 8
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.DeltaWindowSize); err != nil {
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return
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}
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return nil
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}
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func (frame *DataFrame) write(f *Framer) error {
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return f.writeDataFrame(frame)
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}
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// WriteFrame writes a frame.
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func (f *Framer) WriteFrame(frame Frame) error {
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return frame.write(f)
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}
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func writeControlFrameHeader(w io.Writer, h ControlFrameHeader) error {
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if err := binary.Write(w, binary.BigEndian, 0x8000|h.version); err != nil {
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return err
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}
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if err := binary.Write(w, binary.BigEndian, h.frameType); err != nil {
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return err
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}
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flagsAndLength := uint32(h.Flags)<<24 | h.length
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if err := binary.Write(w, binary.BigEndian, flagsAndLength); err != nil {
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return err
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}
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return nil
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}
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func writeHeaderValueBlock(w io.Writer, h http.Header) (n int, err error) {
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n = 0
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if err = binary.Write(w, binary.BigEndian, uint32(len(h))); err != nil {
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return
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}
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n += 2
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for name, values := range h {
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if err = binary.Write(w, binary.BigEndian, uint32(len(name))); err != nil {
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return
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}
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n += 2
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name = strings.ToLower(name)
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if _, err = io.WriteString(w, name); err != nil {
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return
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}
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n += len(name)
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v := strings.Join(values, headerValueSeparator)
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if err = binary.Write(w, binary.BigEndian, uint32(len(v))); err != nil {
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return
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}
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n += 2
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if _, err = io.WriteString(w, v); err != nil {
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return
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}
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n += len(v)
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}
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return
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}
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func (f *Framer) writeSynStreamFrame(frame *SynStreamFrame) (err error) {
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if frame.StreamId == 0 {
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return &Error{ZeroStreamId, 0}
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}
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// Marshal the headers.
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var writer io.Writer = f.headerBuf
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if !f.headerCompressionDisabled {
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writer = f.headerCompressor
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}
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if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
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return
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}
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if !f.headerCompressionDisabled {
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f.headerCompressor.Flush()
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}
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// Set ControlFrameHeader.
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeSynStream
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frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 10)
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.AssociatedToStreamId); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.Priority<<5); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.Slot); err != nil {
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return err
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}
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if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
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return err
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}
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f.headerBuf.Reset()
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return nil
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}
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func (f *Framer) writeSynReplyFrame(frame *SynReplyFrame) (err error) {
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if frame.StreamId == 0 {
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return &Error{ZeroStreamId, 0}
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}
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// Marshal the headers.
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var writer io.Writer = f.headerBuf
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if !f.headerCompressionDisabled {
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writer = f.headerCompressor
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}
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if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
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return
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}
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if !f.headerCompressionDisabled {
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f.headerCompressor.Flush()
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}
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// Set ControlFrameHeader.
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeSynReply
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frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 4)
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
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return
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}
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f.headerBuf.Reset()
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return
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}
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func (f *Framer) writeHeadersFrame(frame *HeadersFrame) (err error) {
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if frame.StreamId == 0 {
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return &Error{ZeroStreamId, 0}
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}
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// Marshal the headers.
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var writer io.Writer = f.headerBuf
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if !f.headerCompressionDisabled {
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writer = f.headerCompressor
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}
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if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
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return
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}
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if !f.headerCompressionDisabled {
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f.headerCompressor.Flush()
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}
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// Set ControlFrameHeader.
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeHeaders
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frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 4)
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// Serialize frame to Writer.
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
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return
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}
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f.headerBuf.Reset()
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return
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}
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func (f *Framer) writeDataFrame(frame *DataFrame) (err error) {
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if frame.StreamId == 0 {
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return &Error{ZeroStreamId, 0}
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}
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if frame.StreamId&0x80000000 != 0 || len(frame.Data) > MaxDataLength {
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return &Error{InvalidDataFrame, frame.StreamId}
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}
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// Serialize frame to Writer.
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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flagsAndLength := uint32(frame.Flags)<<24 | uint32(len(frame.Data))
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if err = binary.Write(f.w, binary.BigEndian, flagsAndLength); err != nil {
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return
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}
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if _, err = f.w.Write(frame.Data); err != nil {
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return
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}
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return nil
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}
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