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imagetools inspect: add --format flag

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Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
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CrazyMax
2022-02-24 17:28:28 +01:00
parent dab3fe71bd
commit 6c56109083
49 changed files with 4754 additions and 89 deletions
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vendor/github.com/containerd/ttrpc/.gitignore generated vendored Normal file
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# Binaries for programs and plugins
*.exe
*.dll
*.so
*.dylib
# Test binary, build with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out

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Apache License
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http://www.apache.org/licenses/
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# ttrpc
[![Build Status](https://github.com/containerd/ttrpc/workflows/CI/badge.svg)](https://github.com/containerd/ttrpc/actions?query=workflow%3ACI)
[![codecov](https://codecov.io/gh/containerd/ttrpc/branch/main/graph/badge.svg)](https://codecov.io/gh/containerd/ttrpc)
GRPC for low-memory environments.
The existing grpc-go project requires a lot of memory overhead for importing
packages and at runtime. While this is great for many services with low density
requirements, this can be a problem when running a large number of services on
a single machine or on a machine with a small amount of memory.
Using the same GRPC definitions, this project reduces the binary size and
protocol overhead required. We do this by eliding the `net/http`, `net/http2`
and `grpc` package used by grpc replacing it with a lightweight framing
protocol. The result are smaller binaries that use less resident memory with
the same ease of use as GRPC.
Please note that while this project supports generating either end of the
protocol, the generated service definitions will be incompatible with regular
GRPC services, as they do not speak the same protocol.
# Usage
Create a gogo vanity binary (see
[`cmd/protoc-gen-gogottrpc/main.go`](cmd/protoc-gen-gogottrpc/main.go) for an
example with the ttrpc plugin enabled.
It's recommended to use [`protobuild`](https://github.com//stevvooe/protobuild)
to build the protobufs for this project, but this will work with protoc
directly, if required.
# Differences from GRPC
- The protocol stack has been replaced with a lighter protocol that doesn't
require http, http2 and tls.
- The client and server interface are identical whereas in GRPC there is a
client and server interface that are different.
- The Go stdlib context package is used instead.
- No support for streams yet.
# Status
TODO:
- [ ] Document protocol layout
- [ ] Add testing under concurrent load to ensure
- [ ] Verify connection error handling
# Project details
ttrpc is a containerd sub-project, licensed under the [Apache 2.0 license](./LICENSE).
As a containerd sub-project, you will find the:
* [Project governance](https://github.com/containerd/project/blob/main/GOVERNANCE.md),
* [Maintainers](https://github.com/containerd/project/blob/main/MAINTAINERS),
* and [Contributing guidelines](https://github.com/containerd/project/blob/main/CONTRIBUTING.md)
information in our [`containerd/project`](https://github.com/containerd/project) repository.

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/*
Copyright The containerd 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 ttrpc
import (
"bufio"
"encoding/binary"
"fmt"
"io"
"net"
"sync"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const (
messageHeaderLength = 10
messageLengthMax = 4 << 20
)
type messageType uint8
const (
messageTypeRequest messageType = 0x1
messageTypeResponse messageType = 0x2
)
// messageHeader represents the fixed-length message header of 10 bytes sent
// with every request.
type messageHeader struct {
Length uint32 // length excluding this header. b[:4]
StreamID uint32 // identifies which request stream message is a part of. b[4:8]
Type messageType // message type b[8]
Flags uint8 // reserved b[9]
}
func readMessageHeader(p []byte, r io.Reader) (messageHeader, error) {
_, err := io.ReadFull(r, p[:messageHeaderLength])
if err != nil {
return messageHeader{}, err
}
return messageHeader{
Length: binary.BigEndian.Uint32(p[:4]),
StreamID: binary.BigEndian.Uint32(p[4:8]),
Type: messageType(p[8]),
Flags: p[9],
}, nil
}
func writeMessageHeader(w io.Writer, p []byte, mh messageHeader) error {
binary.BigEndian.PutUint32(p[:4], mh.Length)
binary.BigEndian.PutUint32(p[4:8], mh.StreamID)
p[8] = byte(mh.Type)
p[9] = mh.Flags
_, err := w.Write(p[:])
return err
}
var buffers sync.Pool
type channel struct {
conn net.Conn
bw *bufio.Writer
br *bufio.Reader
hrbuf [messageHeaderLength]byte // avoid alloc when reading header
hwbuf [messageHeaderLength]byte
}
func newChannel(conn net.Conn) *channel {
return &channel{
conn: conn,
bw: bufio.NewWriter(conn),
br: bufio.NewReader(conn),
}
}
// recv a message from the channel. The returned buffer contains the message.
//
// If a valid grpc status is returned, the message header
// returned will be valid and caller should send that along to
// the correct consumer. The bytes on the underlying channel
// will be discarded.
func (ch *channel) recv() (messageHeader, []byte, error) {
mh, err := readMessageHeader(ch.hrbuf[:], ch.br)
if err != nil {
return messageHeader{}, nil, err
}
if mh.Length > uint32(messageLengthMax) {
if _, err := ch.br.Discard(int(mh.Length)); err != nil {
return mh, nil, fmt.Errorf("failed to discard after receiving oversized message: %w", err)
}
return mh, nil, status.Errorf(codes.ResourceExhausted, "message length %v exceed maximum message size of %v", mh.Length, messageLengthMax)
}
p := ch.getmbuf(int(mh.Length))
if _, err := io.ReadFull(ch.br, p); err != nil {
return messageHeader{}, nil, fmt.Errorf("failed reading message: %w", err)
}
return mh, p, nil
}
func (ch *channel) send(streamID uint32, t messageType, p []byte) error {
if err := writeMessageHeader(ch.bw, ch.hwbuf[:], messageHeader{Length: uint32(len(p)), StreamID: streamID, Type: t}); err != nil {
return err
}
_, err := ch.bw.Write(p)
if err != nil {
return err
}
return ch.bw.Flush()
}
func (ch *channel) getmbuf(size int) []byte {
// we can't use the standard New method on pool because we want to allocate
// based on size.
b, ok := buffers.Get().(*[]byte)
if !ok || cap(*b) < size {
// TODO(stevvooe): It may be better to allocate these in fixed length
// buckets to reduce fragmentation but its not clear that would help
// with performance. An ilogb approach or similar would work well.
bb := make([]byte, size)
b = &bb
} else {
*b = (*b)[:size]
}
return *b
}
func (ch *channel) putmbuf(p []byte) {
buffers.Put(&p)
}

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/*
Copyright The containerd 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 ttrpc
import (
"context"
"errors"
"io"
"net"
"os"
"strings"
"sync"
"syscall"
"time"
"github.com/gogo/protobuf/proto"
"github.com/sirupsen/logrus"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// ErrClosed is returned by client methods when the underlying connection is
// closed.
var ErrClosed = errors.New("ttrpc: closed")
// Client for a ttrpc server
type Client struct {
codec codec
conn net.Conn
channel *channel
calls chan *callRequest
ctx context.Context
closed func()
closeOnce sync.Once
userCloseFunc func()
userCloseWaitCh chan struct{}
errOnce sync.Once
err error
interceptor UnaryClientInterceptor
}
// ClientOpts configures a client
type ClientOpts func(c *Client)
// WithOnClose sets the close func whenever the client's Close() method is called
func WithOnClose(onClose func()) ClientOpts {
return func(c *Client) {
c.userCloseFunc = onClose
}
}
// WithUnaryClientInterceptor sets the provided client interceptor
func WithUnaryClientInterceptor(i UnaryClientInterceptor) ClientOpts {
return func(c *Client) {
c.interceptor = i
}
}
func NewClient(conn net.Conn, opts ...ClientOpts) *Client {
ctx, cancel := context.WithCancel(context.Background())
c := &Client{
codec: codec{},
conn: conn,
channel: newChannel(conn),
calls: make(chan *callRequest),
closed: cancel,
ctx: ctx,
userCloseFunc: func() {},
userCloseWaitCh: make(chan struct{}),
interceptor: defaultClientInterceptor,
}
for _, o := range opts {
o(c)
}
go c.run()
return c
}
type callRequest struct {
ctx context.Context
req *Request
resp *Response // response will be written back here
errs chan error // error written here on completion
}
func (c *Client) Call(ctx context.Context, service, method string, req, resp interface{}) error {
payload, err := c.codec.Marshal(req)
if err != nil {
return err
}
var (
creq = &Request{
Service: service,
Method: method,
Payload: payload,
}
cresp = &Response{}
)
if metadata, ok := GetMetadata(ctx); ok {
metadata.setRequest(creq)
}
if dl, ok := ctx.Deadline(); ok {
creq.TimeoutNano = dl.Sub(time.Now()).Nanoseconds()
}
info := &UnaryClientInfo{
FullMethod: fullPath(service, method),
}
if err := c.interceptor(ctx, creq, cresp, info, c.dispatch); err != nil {
return err
}
if err := c.codec.Unmarshal(cresp.Payload, resp); err != nil {
return err
}
if cresp.Status != nil && cresp.Status.Code != int32(codes.OK) {
return status.ErrorProto(cresp.Status)
}
return nil
}
func (c *Client) dispatch(ctx context.Context, req *Request, resp *Response) error {
errs := make(chan error, 1)
call := &callRequest{
ctx: ctx,
req: req,
resp: resp,
errs: errs,
}
select {
case <-ctx.Done():
return ctx.Err()
case c.calls <- call:
case <-c.ctx.Done():
return c.error()
}
select {
case <-ctx.Done():
return ctx.Err()
case err := <-errs:
return filterCloseErr(err)
case <-c.ctx.Done():
return c.error()
}
}
func (c *Client) Close() error {
c.closeOnce.Do(func() {
c.closed()
})
return nil
}
// UserOnCloseWait is used to blocks untils the user's on-close callback
// finishes.
func (c *Client) UserOnCloseWait(ctx context.Context) error {
select {
case <-c.userCloseWaitCh:
return nil
case <-ctx.Done():
return ctx.Err()
}
}
type message struct {
messageHeader
p []byte
err error
}
// callMap provides access to a map of active calls, guarded by a mutex.
type callMap struct {
m sync.Mutex
activeCalls map[uint32]*callRequest
closeErr error
}
// newCallMap returns a new callMap with an empty set of active calls.
func newCallMap() *callMap {
return &callMap{
activeCalls: make(map[uint32]*callRequest),
}
}
// set adds a call entry to the map with the given streamID key.
func (cm *callMap) set(streamID uint32, cr *callRequest) error {
cm.m.Lock()
defer cm.m.Unlock()
if cm.closeErr != nil {
return cm.closeErr
}
cm.activeCalls[streamID] = cr
return nil
}
// get looks up the call entry for the given streamID key, then removes it
// from the map and returns it.
func (cm *callMap) get(streamID uint32) (cr *callRequest, ok bool, err error) {
cm.m.Lock()
defer cm.m.Unlock()
if cm.closeErr != nil {
return nil, false, cm.closeErr
}
cr, ok = cm.activeCalls[streamID]
if ok {
delete(cm.activeCalls, streamID)
}
return
}
// abort sends the given error to each active call, and clears the map.
// Once abort has been called, any subsequent calls to the callMap will return the error passed to abort.
func (cm *callMap) abort(err error) error {
cm.m.Lock()
defer cm.m.Unlock()
if cm.closeErr != nil {
return cm.closeErr
}
for streamID, call := range cm.activeCalls {
call.errs <- err
delete(cm.activeCalls, streamID)
}
cm.closeErr = err
return nil
}
func (c *Client) run() {
var (
waiters = newCallMap()
receiverDone = make(chan struct{})
)
// Sender goroutine
// Receives calls from dispatch, adds them to the set of active calls, and sends them
// to the server.
go func() {
var streamID uint32 = 1
for {
select {
case <-c.ctx.Done():
return
case call := <-c.calls:
id := streamID
streamID += 2 // enforce odd client initiated request ids
if err := waiters.set(id, call); err != nil {
call.errs <- err // errs is buffered so should not block.
continue
}
if err := c.send(id, messageTypeRequest, call.req); err != nil {
call.errs <- err // errs is buffered so should not block.
waiters.get(id) // remove from waiters set
}
}
}
}()
// Receiver goroutine
// Receives responses from the server, looks up the call info in the set of active calls,
// and notifies the caller of the response.
go func() {
defer close(receiverDone)
for {
select {
case <-c.ctx.Done():
c.setError(c.ctx.Err())
return
default:
mh, p, err := c.channel.recv()
if err != nil {
_, ok := status.FromError(err)
if !ok {
// treat all errors that are not an rpc status as terminal.
// all others poison the connection.
c.setError(filterCloseErr(err))
return
}
}
msg := &message{
messageHeader: mh,
p: p[:mh.Length],
err: err,
}
call, ok, err := waiters.get(mh.StreamID)
if err != nil {
logrus.Errorf("ttrpc: failed to look up active call: %s", err)
continue
}
if !ok {
logrus.Errorf("ttrpc: received message for unknown channel %v", mh.StreamID)
continue
}
call.errs <- c.recv(call.resp, msg)
}
}
}()
defer func() {
c.conn.Close()
c.userCloseFunc()
close(c.userCloseWaitCh)
}()
for {
select {
case <-receiverDone:
// The receiver has exited.
// don't return out, let the close of the context trigger the abort of waiters
c.Close()
case <-c.ctx.Done():
// Abort all active calls. This will also prevent any new calls from being added
// to waiters.
waiters.abort(c.error())
return
}
}
}
func (c *Client) error() error {
c.errOnce.Do(func() {
if c.err == nil {
c.err = ErrClosed
}
})
return c.err
}
func (c *Client) setError(err error) {
c.errOnce.Do(func() {
c.err = err
})
}
func (c *Client) send(streamID uint32, mtype messageType, msg interface{}) error {
p, err := c.codec.Marshal(msg)
if err != nil {
return err
}
return c.channel.send(streamID, mtype, p)
}
func (c *Client) recv(resp *Response, msg *message) error {
if msg.err != nil {
return msg.err
}
if msg.Type != messageTypeResponse {
return errors.New("unknown message type received")
}
defer c.channel.putmbuf(msg.p)
return proto.Unmarshal(msg.p, resp)
}
// filterCloseErr rewrites EOF and EPIPE errors to ErrClosed. Use when
// returning from call or handling errors from main read loop.
//
// This purposely ignores errors with a wrapped cause.
func filterCloseErr(err error) error {
switch {
case err == nil:
return nil
case err == io.EOF:
return ErrClosed
case errors.Is(err, io.EOF):
return ErrClosed
case strings.Contains(err.Error(), "use of closed network connection"):
return ErrClosed
default:
// if we have an epipe on a write or econnreset on a read , we cast to errclosed
var oerr *net.OpError
if errors.As(err, &oerr) && (oerr.Op == "write" || oerr.Op == "read") {
serr, sok := oerr.Err.(*os.SyscallError)
if sok && ((serr.Err == syscall.EPIPE && oerr.Op == "write") ||
(serr.Err == syscall.ECONNRESET && oerr.Op == "read")) {
return ErrClosed
}
}
}
return err
}

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vendor/github.com/containerd/ttrpc/codec.go generated vendored Normal file
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/*
Copyright The containerd 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 ttrpc
import (
"fmt"
"github.com/gogo/protobuf/proto"
)
type codec struct{}
func (c codec) Marshal(msg interface{}) ([]byte, error) {
switch v := msg.(type) {
case proto.Message:
return proto.Marshal(v)
default:
return nil, fmt.Errorf("ttrpc: cannot marshal unknown type: %T", msg)
}
}
func (c codec) Unmarshal(p []byte, msg interface{}) error {
switch v := msg.(type) {
case proto.Message:
return proto.Unmarshal(p, v)
default:
return fmt.Errorf("ttrpc: cannot unmarshal into unknown type: %T", msg)
}
}

52
vendor/github.com/containerd/ttrpc/config.go generated vendored Normal file
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@@ -0,0 +1,52 @@
/*
Copyright The containerd 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 ttrpc
import "errors"
type serverConfig struct {
handshaker Handshaker
interceptor UnaryServerInterceptor
}
// ServerOpt for configuring a ttrpc server
type ServerOpt func(*serverConfig) error
// WithServerHandshaker can be passed to NewServer to ensure that the
// handshaker is called before every connection attempt.
//
// Only one handshaker is allowed per server.
func WithServerHandshaker(handshaker Handshaker) ServerOpt {
return func(c *serverConfig) error {
if c.handshaker != nil {
return errors.New("only one handshaker allowed per server")
}
c.handshaker = handshaker
return nil
}
}
// WithUnaryServerInterceptor sets the provided interceptor on the server
func WithUnaryServerInterceptor(i UnaryServerInterceptor) ServerOpt {
return func(c *serverConfig) error {
if c.interceptor != nil {
return errors.New("only one interceptor allowed per server")
}
c.interceptor = i
return nil
}
}

13
vendor/github.com/containerd/ttrpc/go.mod generated vendored Normal file
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@@ -0,0 +1,13 @@
module github.com/containerd/ttrpc
go 1.13
require (
github.com/gogo/protobuf v1.3.2
github.com/prometheus/procfs v0.6.0
github.com/sirupsen/logrus v1.8.1
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63
google.golang.org/grpc v1.27.1
google.golang.org/protobuf v1.27.1
)

99
vendor/github.com/containerd/ttrpc/go.sum generated vendored Normal file
View File

@@ -0,0 +1,99 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3xv4=
github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk=
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63 h1:YzfoEYWbODU5Fbt37+h7X16BWQbad7Q4S6gclTKFXM8=
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.1 h1:zvIju4sqAGvwKspUQOhwnpcqSbzi7/H6QomNNjTL4sk=
google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

50
vendor/github.com/containerd/ttrpc/handshake.go generated vendored Normal file
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@@ -0,0 +1,50 @@
/*
Copyright The containerd 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 ttrpc
import (
"context"
"net"
)
// Handshaker defines the interface for connection handshakes performed on the
// server or client when first connecting.
type Handshaker interface {
// Handshake should confirm or decorate a connection that may be incoming
// to a server or outgoing from a client.
//
// If this returns without an error, the caller should use the connection
// in place of the original connection.
//
// The second return value can contain credential specific data, such as
// unix socket credentials or TLS information.
//
// While we currently only have implementations on the server-side, this
// interface should be sufficient to implement similar handshakes on the
// client-side.
Handshake(ctx context.Context, conn net.Conn) (net.Conn, interface{}, error)
}
type handshakerFunc func(ctx context.Context, conn net.Conn) (net.Conn, interface{}, error)
func (fn handshakerFunc) Handshake(ctx context.Context, conn net.Conn) (net.Conn, interface{}, error) {
return fn(ctx, conn)
}
func noopHandshake(ctx context.Context, conn net.Conn) (net.Conn, interface{}, error) {
return conn, nil, nil
}

50
vendor/github.com/containerd/ttrpc/interceptor.go generated vendored Normal file
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@@ -0,0 +1,50 @@
/*
Copyright The containerd 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 ttrpc
import "context"
// UnaryServerInfo provides information about the server request
type UnaryServerInfo struct {
FullMethod string
}
// UnaryClientInfo provides information about the client request
type UnaryClientInfo struct {
FullMethod string
}
// Unmarshaler contains the server request data and allows it to be unmarshaled
// into a concrete type
type Unmarshaler func(interface{}) error
// Invoker invokes the client's request and response from the ttrpc server
type Invoker func(context.Context, *Request, *Response) error
// UnaryServerInterceptor specifies the interceptor function for server request/response
type UnaryServerInterceptor func(context.Context, Unmarshaler, *UnaryServerInfo, Method) (interface{}, error)
// UnaryClientInterceptor specifies the interceptor function for client request/response
type UnaryClientInterceptor func(context.Context, *Request, *Response, *UnaryClientInfo, Invoker) error
func defaultServerInterceptor(ctx context.Context, unmarshal Unmarshaler, info *UnaryServerInfo, method Method) (interface{}, error) {
return method(ctx, unmarshal)
}
func defaultClientInterceptor(ctx context.Context, req *Request, resp *Response, _ *UnaryClientInfo, invoker Invoker) error {
return invoker(ctx, req, resp)
}

107
vendor/github.com/containerd/ttrpc/metadata.go generated vendored Normal file
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/*
Copyright The containerd 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 ttrpc
import (
"context"
"strings"
)
// MD is the user type for ttrpc metadata
type MD map[string][]string
// Get returns the metadata for a given key when they exist.
// If there is no metadata, a nil slice and false are returned.
func (m MD) Get(key string) ([]string, bool) {
key = strings.ToLower(key)
list, ok := m[key]
if !ok || len(list) == 0 {
return nil, false
}
return list, true
}
// Set sets the provided values for a given key.
// The values will overwrite any existing values.
// If no values provided, a key will be deleted.
func (m MD) Set(key string, values ...string) {
key = strings.ToLower(key)
if len(values) == 0 {
delete(m, key)
return
}
m[key] = values
}
// Append appends additional values to the given key.
func (m MD) Append(key string, values ...string) {
key = strings.ToLower(key)
if len(values) == 0 {
return
}
current, ok := m[key]
if ok {
m.Set(key, append(current, values...)...)
} else {
m.Set(key, values...)
}
}
func (m MD) setRequest(r *Request) {
for k, values := range m {
for _, v := range values {
r.Metadata = append(r.Metadata, &KeyValue{
Key: k,
Value: v,
})
}
}
}
func (m MD) fromRequest(r *Request) {
for _, kv := range r.Metadata {
m[kv.Key] = append(m[kv.Key], kv.Value)
}
}
type metadataKey struct{}
// GetMetadata retrieves metadata from context.Context (previously attached with WithMetadata)
func GetMetadata(ctx context.Context) (MD, bool) {
metadata, ok := ctx.Value(metadataKey{}).(MD)
return metadata, ok
}
// GetMetadataValue gets a specific metadata value by name from context.Context
func GetMetadataValue(ctx context.Context, name string) (string, bool) {
metadata, ok := GetMetadata(ctx)
if !ok {
return "", false
}
if list, ok := metadata.Get(name); ok {
return list[0], true
}
return "", false
}
// WithMetadata attaches metadata map to a context.Context
func WithMetadata(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, metadataKey{}, md)
}

500
vendor/github.com/containerd/ttrpc/server.go generated vendored Normal file
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@@ -0,0 +1,500 @@
/*
Copyright The containerd 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 ttrpc
import (
"context"
"errors"
"io"
"math/rand"
"net"
"sync"
"sync/atomic"
"time"
"github.com/sirupsen/logrus"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var (
ErrServerClosed = errors.New("ttrpc: server closed")
)
type Server struct {
config *serverConfig
services *serviceSet
codec codec
mu sync.Mutex
listeners map[net.Listener]struct{}
connections map[*serverConn]struct{} // all connections to current state
done chan struct{} // marks point at which we stop serving requests
}
func NewServer(opts ...ServerOpt) (*Server, error) {
config := &serverConfig{}
for _, opt := range opts {
if err := opt(config); err != nil {
return nil, err
}
}
if config.interceptor == nil {
config.interceptor = defaultServerInterceptor
}
return &Server{
config: config,
services: newServiceSet(config.interceptor),
done: make(chan struct{}),
listeners: make(map[net.Listener]struct{}),
connections: make(map[*serverConn]struct{}),
}, nil
}
func (s *Server) Register(name string, methods map[string]Method) {
s.services.register(name, methods)
}
func (s *Server) Serve(ctx context.Context, l net.Listener) error {
s.addListener(l)
defer s.closeListener(l)
var (
backoff time.Duration
handshaker = s.config.handshaker
)
if handshaker == nil {
handshaker = handshakerFunc(noopHandshake)
}
for {
conn, err := l.Accept()
if err != nil {
select {
case <-s.done:
return ErrServerClosed
default:
}
if terr, ok := err.(interface {
Temporary() bool
}); ok && terr.Temporary() {
if backoff == 0 {
backoff = time.Millisecond
} else {
backoff *= 2
}
if max := time.Second; backoff > max {
backoff = max
}
sleep := time.Duration(rand.Int63n(int64(backoff)))
logrus.WithError(err).Errorf("ttrpc: failed accept; backoff %v", sleep)
time.Sleep(sleep)
continue
}
return err
}
backoff = 0
approved, handshake, err := handshaker.Handshake(ctx, conn)
if err != nil {
logrus.WithError(err).Errorf("ttrpc: refusing connection after handshake")
conn.Close()
continue
}
sc := s.newConn(approved, handshake)
go sc.run(ctx)
}
}
func (s *Server) Shutdown(ctx context.Context) error {
s.mu.Lock()
select {
case <-s.done:
default:
// protected by mutex
close(s.done)
}
lnerr := s.closeListeners()
s.mu.Unlock()
ticker := time.NewTicker(200 * time.Millisecond)
defer ticker.Stop()
for {
if s.closeIdleConns() {
return lnerr
}
select {
case <-ctx.Done():
return ctx.Err()
case <-ticker.C:
}
}
}
// Close the server without waiting for active connections.
func (s *Server) Close() error {
s.mu.Lock()
defer s.mu.Unlock()
select {
case <-s.done:
default:
// protected by mutex
close(s.done)
}
err := s.closeListeners()
for c := range s.connections {
c.close()
delete(s.connections, c)
}
return err
}
func (s *Server) addListener(l net.Listener) {
s.mu.Lock()
defer s.mu.Unlock()
s.listeners[l] = struct{}{}
}
func (s *Server) closeListener(l net.Listener) error {
s.mu.Lock()
defer s.mu.Unlock()
return s.closeListenerLocked(l)
}
func (s *Server) closeListenerLocked(l net.Listener) error {
defer delete(s.listeners, l)
return l.Close()
}
func (s *Server) closeListeners() error {
var err error
for l := range s.listeners {
if cerr := s.closeListenerLocked(l); cerr != nil && err == nil {
err = cerr
}
}
return err
}
func (s *Server) addConnection(c *serverConn) {
s.mu.Lock()
defer s.mu.Unlock()
s.connections[c] = struct{}{}
}
func (s *Server) delConnection(c *serverConn) {
s.mu.Lock()
defer s.mu.Unlock()
delete(s.connections, c)
}
func (s *Server) countConnection() int {
s.mu.Lock()
defer s.mu.Unlock()
return len(s.connections)
}
func (s *Server) closeIdleConns() bool {
s.mu.Lock()
defer s.mu.Unlock()
quiescent := true
for c := range s.connections {
st, ok := c.getState()
if !ok || st != connStateIdle {
quiescent = false
continue
}
c.close()
delete(s.connections, c)
}
return quiescent
}
type connState int
const (
connStateActive = iota + 1 // outstanding requests
connStateIdle // no requests
connStateClosed // closed connection
)
func (cs connState) String() string {
switch cs {
case connStateActive:
return "active"
case connStateIdle:
return "idle"
case connStateClosed:
return "closed"
default:
return "unknown"
}
}
func (s *Server) newConn(conn net.Conn, handshake interface{}) *serverConn {
c := &serverConn{
server: s,
conn: conn,
handshake: handshake,
shutdown: make(chan struct{}),
}
c.setState(connStateIdle)
s.addConnection(c)
return c
}
type serverConn struct {
server *Server
conn net.Conn
handshake interface{} // data from handshake, not used for now
state atomic.Value
shutdownOnce sync.Once
shutdown chan struct{} // forced shutdown, used by close
}
func (c *serverConn) getState() (connState, bool) {
cs, ok := c.state.Load().(connState)
return cs, ok
}
func (c *serverConn) setState(newstate connState) {
c.state.Store(newstate)
}
func (c *serverConn) close() error {
c.shutdownOnce.Do(func() {
close(c.shutdown)
})
return nil
}
func (c *serverConn) run(sctx context.Context) {
type (
request struct {
id uint32
req *Request
}
response struct {
id uint32
resp *Response
}
)
var (
ch = newChannel(c.conn)
ctx, cancel = context.WithCancel(sctx)
active int
state connState = connStateIdle
responses = make(chan response)
requests = make(chan request)
recvErr = make(chan error, 1)
shutdown = c.shutdown
done = make(chan struct{})
)
defer c.conn.Close()
defer cancel()
defer close(done)
defer c.server.delConnection(c)
go func(recvErr chan error) {
defer close(recvErr)
sendImmediate := func(id uint32, st *status.Status) bool {
select {
case responses <- response{
// even though we've had an invalid stream id, we send it
// back on the same stream id so the client knows which
// stream id was bad.
id: id,
resp: &Response{
Status: st.Proto(),
},
}:
return true
case <-c.shutdown:
return false
case <-done:
return false
}
}
for {
select {
case <-c.shutdown:
return
case <-done:
return
default: // proceed
}
mh, p, err := ch.recv()
if err != nil {
status, ok := status.FromError(err)
if !ok {
recvErr <- err
return
}
// in this case, we send an error for that particular message
// when the status is defined.
if !sendImmediate(mh.StreamID, status) {
return
}
continue
}
if mh.Type != messageTypeRequest {
// we must ignore this for future compat.
continue
}
var req Request
if err := c.server.codec.Unmarshal(p, &req); err != nil {
ch.putmbuf(p)
if !sendImmediate(mh.StreamID, status.Newf(codes.InvalidArgument, "unmarshal request error: %v", err)) {
return
}
continue
}
ch.putmbuf(p)
if mh.StreamID%2 != 1 {
// enforce odd client initiated identifiers.
if !sendImmediate(mh.StreamID, status.Newf(codes.InvalidArgument, "StreamID must be odd for client initiated streams")) {
return
}
continue
}
// Forward the request to the main loop. We don't wait on s.done
// because we have already accepted the client request.
select {
case requests <- request{
id: mh.StreamID,
req: &req,
}:
case <-done:
return
}
}
}(recvErr)
for {
newstate := state
switch {
case active > 0:
newstate = connStateActive
shutdown = nil
case active == 0:
newstate = connStateIdle
shutdown = c.shutdown // only enable this branch in idle mode
}
if newstate != state {
c.setState(newstate)
state = newstate
}
select {
case request := <-requests:
active++
go func(id uint32) {
ctx, cancel := getRequestContext(ctx, request.req)
defer cancel()
p, status := c.server.services.call(ctx, request.req.Service, request.req.Method, request.req.Payload)
resp := &Response{
Status: status.Proto(),
Payload: p,
}
select {
case responses <- response{
id: id,
resp: resp,
}:
case <-done:
}
}(request.id)
case response := <-responses:
p, err := c.server.codec.Marshal(response.resp)
if err != nil {
logrus.WithError(err).Error("failed marshaling response")
return
}
if err := ch.send(response.id, messageTypeResponse, p); err != nil {
logrus.WithError(err).Error("failed sending message on channel")
return
}
active--
case err := <-recvErr:
// TODO(stevvooe): Not wildly clear what we should do in this
// branch. Basically, it means that we are no longer receiving
// requests due to a terminal error.
recvErr = nil // connection is now "closing"
if err == io.EOF || err == io.ErrUnexpectedEOF {
// The client went away and we should stop processing
// requests, so that the client connection is closed
return
}
if err != nil {
logrus.WithError(err).Error("error receiving message")
}
case <-shutdown:
return
}
}
}
var noopFunc = func() {}
func getRequestContext(ctx context.Context, req *Request) (retCtx context.Context, cancel func()) {
if len(req.Metadata) > 0 {
md := MD{}
md.fromRequest(req)
ctx = WithMetadata(ctx, md)
}
cancel = noopFunc
if req.TimeoutNano == 0 {
return ctx, cancel
}
ctx, cancel = context.WithTimeout(ctx, time.Duration(req.TimeoutNano))
return ctx, cancel
}

166
vendor/github.com/containerd/ttrpc/services.go generated vendored Normal file
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@@ -0,0 +1,166 @@
/*
Copyright The containerd 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 ttrpc
import (
"context"
"errors"
"fmt"
"io"
"os"
"path"
"unsafe"
"github.com/gogo/protobuf/proto"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
type Method func(ctx context.Context, unmarshal func(interface{}) error) (interface{}, error)
type ServiceDesc struct {
Methods map[string]Method
// TODO(stevvooe): Add stream support.
}
type serviceSet struct {
services map[string]ServiceDesc
interceptor UnaryServerInterceptor
}
func newServiceSet(interceptor UnaryServerInterceptor) *serviceSet {
return &serviceSet{
services: make(map[string]ServiceDesc),
interceptor: interceptor,
}
}
func (s *serviceSet) register(name string, methods map[string]Method) {
if _, ok := s.services[name]; ok {
panic(fmt.Errorf("duplicate service %v registered", name))
}
s.services[name] = ServiceDesc{
Methods: methods,
}
}
func (s *serviceSet) call(ctx context.Context, serviceName, methodName string, p []byte) ([]byte, *status.Status) {
p, err := s.dispatch(ctx, serviceName, methodName, p)
st, ok := status.FromError(err)
if !ok {
st = status.New(convertCode(err), err.Error())
}
return p, st
}
func (s *serviceSet) dispatch(ctx context.Context, serviceName, methodName string, p []byte) ([]byte, error) {
method, err := s.resolve(serviceName, methodName)
if err != nil {
return nil, err
}
unmarshal := func(obj interface{}) error {
switch v := obj.(type) {
case proto.Message:
if err := proto.Unmarshal(p, v); err != nil {
return status.Errorf(codes.Internal, "ttrpc: error unmarshalling payload: %v", err.Error())
}
default:
return status.Errorf(codes.Internal, "ttrpc: error unsupported request type: %T", v)
}
return nil
}
info := &UnaryServerInfo{
FullMethod: fullPath(serviceName, methodName),
}
resp, err := s.interceptor(ctx, unmarshal, info, method)
if err != nil {
return nil, err
}
if isNil(resp) {
return nil, errors.New("ttrpc: marshal called with nil")
}
switch v := resp.(type) {
case proto.Message:
r, err := proto.Marshal(v)
if err != nil {
return nil, status.Errorf(codes.Internal, "ttrpc: error marshaling payload: %v", err.Error())
}
return r, nil
default:
return nil, status.Errorf(codes.Internal, "ttrpc: error unsupported response type: %T", v)
}
}
func (s *serviceSet) resolve(service, method string) (Method, error) {
srv, ok := s.services[service]
if !ok {
return nil, status.Errorf(codes.Unimplemented, "service %v", service)
}
mthd, ok := srv.Methods[method]
if !ok {
return nil, status.Errorf(codes.Unimplemented, "method %v", method)
}
return mthd, nil
}
// convertCode maps stdlib go errors into grpc space.
//
// This is ripped from the grpc-go code base.
func convertCode(err error) codes.Code {
switch err {
case nil:
return codes.OK
case io.EOF:
return codes.OutOfRange
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
return codes.FailedPrecondition
case os.ErrInvalid:
return codes.InvalidArgument
case context.Canceled:
return codes.Canceled
case context.DeadlineExceeded:
return codes.DeadlineExceeded
}
switch {
case os.IsExist(err):
return codes.AlreadyExists
case os.IsNotExist(err):
return codes.NotFound
case os.IsPermission(err):
return codes.PermissionDenied
}
return codes.Unknown
}
func fullPath(service, method string) string {
return "/" + path.Join(service, method)
}
func isNil(resp interface{}) bool {
return (*[2]uintptr)(unsafe.Pointer(&resp))[1] == 0
}

63
vendor/github.com/containerd/ttrpc/types.go generated vendored Normal file
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@@ -0,0 +1,63 @@
/*
Copyright The containerd 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 ttrpc
import (
"fmt"
spb "google.golang.org/genproto/googleapis/rpc/status"
)
type Request struct {
Service string `protobuf:"bytes,1,opt,name=service,proto3"`
Method string `protobuf:"bytes,2,opt,name=method,proto3"`
Payload []byte `protobuf:"bytes,3,opt,name=payload,proto3"`
TimeoutNano int64 `protobuf:"varint,4,opt,name=timeout_nano,proto3"`
Metadata []*KeyValue `protobuf:"bytes,5,rep,name=metadata,proto3"`
}
func (r *Request) Reset() { *r = Request{} }
func (r *Request) String() string { return fmt.Sprintf("%+#v", r) }
func (r *Request) ProtoMessage() {}
type Response struct {
Status *spb.Status `protobuf:"bytes,1,opt,name=status,proto3"`
Payload []byte `protobuf:"bytes,2,opt,name=payload,proto3"`
}
func (r *Response) Reset() { *r = Response{} }
func (r *Response) String() string { return fmt.Sprintf("%+#v", r) }
func (r *Response) ProtoMessage() {}
type StringList struct {
List []string `protobuf:"bytes,1,rep,name=list,proto3"`
}
func (r *StringList) Reset() { *r = StringList{} }
func (r *StringList) String() string { return fmt.Sprintf("%+#v", r) }
func (r *StringList) ProtoMessage() {}
func makeStringList(item ...string) StringList { return StringList{List: item} }
type KeyValue struct {
Key string `protobuf:"bytes,1,opt,name=key,proto3"`
Value string `protobuf:"bytes,2,opt,name=value,proto3"`
}
func (m *KeyValue) Reset() { *m = KeyValue{} }
func (*KeyValue) ProtoMessage() {}
func (m *KeyValue) String() string { return fmt.Sprintf("%+#v", m) }

109
vendor/github.com/containerd/ttrpc/unixcreds_linux.go generated vendored Normal file
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@@ -0,0 +1,109 @@
/*
Copyright The containerd 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 ttrpc
import (
"context"
"errors"
"fmt"
"net"
"os"
"syscall"
"golang.org/x/sys/unix"
)
type UnixCredentialsFunc func(*unix.Ucred) error
func (fn UnixCredentialsFunc) Handshake(ctx context.Context, conn net.Conn) (net.Conn, interface{}, error) {
uc, err := requireUnixSocket(conn)
if err != nil {
return nil, nil, fmt.Errorf("ttrpc.UnixCredentialsFunc: require unix socket: %w", err)
}
rs, err := uc.SyscallConn()
if err != nil {
return nil, nil, fmt.Errorf("ttrpc.UnixCredentialsFunc: (net.UnixConn).SyscallConn failed: %w", err)
}
var (
ucred *unix.Ucred
ucredErr error
)
if err := rs.Control(func(fd uintptr) {
ucred, ucredErr = unix.GetsockoptUcred(int(fd), unix.SOL_SOCKET, unix.SO_PEERCRED)
}); err != nil {
return nil, nil, fmt.Errorf("ttrpc.UnixCredentialsFunc: (*syscall.RawConn).Control failed: %w", err)
}
if ucredErr != nil {
return nil, nil, fmt.Errorf("ttrpc.UnixCredentialsFunc: failed to retrieve socket peer credentials: %w", err)
}
if err := fn(ucred); err != nil {
return nil, nil, fmt.Errorf("ttrpc.UnixCredentialsFunc: credential check failed: %w", err)
}
return uc, ucred, nil
}
// UnixSocketRequireUidGid requires specific *effective* UID/GID, rather than the real UID/GID.
//
// For example, if a daemon binary is owned by the root (UID 0) with SUID bit but running as an
// unprivileged user (UID 1001), the effective UID becomes 0, and the real UID becomes 1001.
// So calling this function with uid=0 allows a connection from effective UID 0 but rejects
// a connection from effective UID 1001.
//
// See socket(7), SO_PEERCRED: "The returned credentials are those that were in effect at the time of the call to connect(2) or socketpair(2)."
func UnixSocketRequireUidGid(uid, gid int) UnixCredentialsFunc {
return func(ucred *unix.Ucred) error {
return requireUidGid(ucred, uid, gid)
}
}
func UnixSocketRequireRoot() UnixCredentialsFunc {
return UnixSocketRequireUidGid(0, 0)
}
// UnixSocketRequireSameUser resolves the current effective unix user and returns a
// UnixCredentialsFunc that will validate incoming unix connections against the
// current credentials.
//
// This is useful when using abstract sockets that are accessible by all users.
func UnixSocketRequireSameUser() UnixCredentialsFunc {
euid, egid := os.Geteuid(), os.Getegid()
return UnixSocketRequireUidGid(euid, egid)
}
func requireRoot(ucred *unix.Ucred) error {
return requireUidGid(ucred, 0, 0)
}
func requireUidGid(ucred *unix.Ucred, uid, gid int) error {
if (uid != -1 && uint32(uid) != ucred.Uid) || (gid != -1 && uint32(gid) != ucred.Gid) {
return fmt.Errorf("ttrpc: invalid credentials: %v", syscall.EPERM)
}
return nil
}
func requireUnixSocket(conn net.Conn) (*net.UnixConn, error) {
uc, ok := conn.(*net.UnixConn)
if !ok {
return nil, errors.New("a unix socket connection is required")
}
return uc, nil
}