status-go/vendor/github.com/lucas-clemente/quic-go/streams_map.go

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2022-04-01 16:16:46 +00:00
package quic
import (
"context"
"errors"
"fmt"
"net"
"sync"
"github.com/lucas-clemente/quic-go/internal/flowcontrol"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/qerr"
"github.com/lucas-clemente/quic-go/internal/wire"
)
type streamError struct {
message string
nums []protocol.StreamNum
}
func (e streamError) Error() string {
return e.message
}
func convertStreamError(err error, stype protocol.StreamType, pers protocol.Perspective) error {
strError, ok := err.(streamError)
if !ok {
return err
}
ids := make([]interface{}, len(strError.nums))
for i, num := range strError.nums {
ids[i] = num.StreamID(stype, pers)
}
return fmt.Errorf(strError.Error(), ids...)
}
type streamOpenErr struct{ error }
var _ net.Error = &streamOpenErr{}
func (e streamOpenErr) Temporary() bool { return e.error == errTooManyOpenStreams }
func (streamOpenErr) Timeout() bool { return false }
// errTooManyOpenStreams is used internally by the outgoing streams maps.
var errTooManyOpenStreams = errors.New("too many open streams")
type streamsMap struct {
perspective protocol.Perspective
version protocol.VersionNumber
maxIncomingBidiStreams uint64
maxIncomingUniStreams uint64
sender streamSender
newFlowController func(protocol.StreamID) flowcontrol.StreamFlowController
mutex sync.Mutex
outgoingBidiStreams *outgoingBidiStreamsMap
outgoingUniStreams *outgoingUniStreamsMap
incomingBidiStreams *incomingBidiStreamsMap
incomingUniStreams *incomingUniStreamsMap
reset bool
}
var _ streamManager = &streamsMap{}
func newStreamsMap(
sender streamSender,
newFlowController func(protocol.StreamID) flowcontrol.StreamFlowController,
maxIncomingBidiStreams uint64,
maxIncomingUniStreams uint64,
perspective protocol.Perspective,
version protocol.VersionNumber,
) streamManager {
m := &streamsMap{
perspective: perspective,
newFlowController: newFlowController,
maxIncomingBidiStreams: maxIncomingBidiStreams,
maxIncomingUniStreams: maxIncomingUniStreams,
sender: sender,
version: version,
}
m.initMaps()
return m
}
func (m *streamsMap) initMaps() {
m.outgoingBidiStreams = newOutgoingBidiStreamsMap(
func(num protocol.StreamNum) streamI {
id := num.StreamID(protocol.StreamTypeBidi, m.perspective)
return newStream(id, m.sender, m.newFlowController(id), m.version)
},
m.sender.queueControlFrame,
)
m.incomingBidiStreams = newIncomingBidiStreamsMap(
func(num protocol.StreamNum) streamI {
id := num.StreamID(protocol.StreamTypeBidi, m.perspective.Opposite())
return newStream(id, m.sender, m.newFlowController(id), m.version)
},
m.maxIncomingBidiStreams,
m.sender.queueControlFrame,
)
m.outgoingUniStreams = newOutgoingUniStreamsMap(
func(num protocol.StreamNum) sendStreamI {
id := num.StreamID(protocol.StreamTypeUni, m.perspective)
return newSendStream(id, m.sender, m.newFlowController(id), m.version)
},
m.sender.queueControlFrame,
)
m.incomingUniStreams = newIncomingUniStreamsMap(
func(num protocol.StreamNum) receiveStreamI {
id := num.StreamID(protocol.StreamTypeUni, m.perspective.Opposite())
return newReceiveStream(id, m.sender, m.newFlowController(id), m.version)
},
m.maxIncomingUniStreams,
m.sender.queueControlFrame,
)
}
func (m *streamsMap) OpenStream() (Stream, error) {
m.mutex.Lock()
reset := m.reset
mm := m.outgoingBidiStreams
m.mutex.Unlock()
if reset {
return nil, Err0RTTRejected
}
str, err := mm.OpenStream()
return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective)
}
func (m *streamsMap) OpenStreamSync(ctx context.Context) (Stream, error) {
m.mutex.Lock()
reset := m.reset
mm := m.outgoingBidiStreams
m.mutex.Unlock()
if reset {
return nil, Err0RTTRejected
}
str, err := mm.OpenStreamSync(ctx)
return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective)
}
func (m *streamsMap) OpenUniStream() (SendStream, error) {
m.mutex.Lock()
reset := m.reset
mm := m.outgoingUniStreams
m.mutex.Unlock()
if reset {
return nil, Err0RTTRejected
}
str, err := mm.OpenStream()
return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective)
}
func (m *streamsMap) OpenUniStreamSync(ctx context.Context) (SendStream, error) {
m.mutex.Lock()
reset := m.reset
mm := m.outgoingUniStreams
m.mutex.Unlock()
if reset {
return nil, Err0RTTRejected
}
str, err := mm.OpenStreamSync(ctx)
return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective)
}
func (m *streamsMap) AcceptStream(ctx context.Context) (Stream, error) {
m.mutex.Lock()
reset := m.reset
mm := m.incomingBidiStreams
m.mutex.Unlock()
if reset {
return nil, Err0RTTRejected
}
str, err := mm.AcceptStream(ctx)
return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective.Opposite())
}
func (m *streamsMap) AcceptUniStream(ctx context.Context) (ReceiveStream, error) {
m.mutex.Lock()
reset := m.reset
mm := m.incomingUniStreams
m.mutex.Unlock()
if reset {
return nil, Err0RTTRejected
}
str, err := mm.AcceptStream(ctx)
return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective.Opposite())
}
func (m *streamsMap) DeleteStream(id protocol.StreamID) error {
num := id.StreamNum()
switch id.Type() {
case protocol.StreamTypeUni:
if id.InitiatedBy() == m.perspective {
return convertStreamError(m.outgoingUniStreams.DeleteStream(num), protocol.StreamTypeUni, m.perspective)
}
return convertStreamError(m.incomingUniStreams.DeleteStream(num), protocol.StreamTypeUni, m.perspective.Opposite())
case protocol.StreamTypeBidi:
if id.InitiatedBy() == m.perspective {
return convertStreamError(m.outgoingBidiStreams.DeleteStream(num), protocol.StreamTypeBidi, m.perspective)
}
return convertStreamError(m.incomingBidiStreams.DeleteStream(num), protocol.StreamTypeBidi, m.perspective.Opposite())
}
panic("")
}
func (m *streamsMap) GetOrOpenReceiveStream(id protocol.StreamID) (receiveStreamI, error) {
str, err := m.getOrOpenReceiveStream(id)
if err != nil {
return nil, &qerr.TransportError{
ErrorCode: qerr.StreamStateError,
ErrorMessage: err.Error(),
}
}
return str, nil
}
func (m *streamsMap) getOrOpenReceiveStream(id protocol.StreamID) (receiveStreamI, error) {
num := id.StreamNum()
switch id.Type() {
case protocol.StreamTypeUni:
if id.InitiatedBy() == m.perspective {
// an outgoing unidirectional stream is a send stream, not a receive stream
return nil, fmt.Errorf("peer attempted to open receive stream %d", id)
}
str, err := m.incomingUniStreams.GetOrOpenStream(num)
return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective)
case protocol.StreamTypeBidi:
var str receiveStreamI
var err error
if id.InitiatedBy() == m.perspective {
str, err = m.outgoingBidiStreams.GetStream(num)
} else {
str, err = m.incomingBidiStreams.GetOrOpenStream(num)
}
return str, convertStreamError(err, protocol.StreamTypeBidi, id.InitiatedBy())
}
panic("")
}
func (m *streamsMap) GetOrOpenSendStream(id protocol.StreamID) (sendStreamI, error) {
str, err := m.getOrOpenSendStream(id)
if err != nil {
return nil, &qerr.TransportError{
ErrorCode: qerr.StreamStateError,
ErrorMessage: err.Error(),
}
}
return str, nil
}
func (m *streamsMap) getOrOpenSendStream(id protocol.StreamID) (sendStreamI, error) {
num := id.StreamNum()
switch id.Type() {
case protocol.StreamTypeUni:
if id.InitiatedBy() == m.perspective {
str, err := m.outgoingUniStreams.GetStream(num)
return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective)
}
// an incoming unidirectional stream is a receive stream, not a send stream
return nil, fmt.Errorf("peer attempted to open send stream %d", id)
case protocol.StreamTypeBidi:
var str sendStreamI
var err error
if id.InitiatedBy() == m.perspective {
str, err = m.outgoingBidiStreams.GetStream(num)
} else {
str, err = m.incomingBidiStreams.GetOrOpenStream(num)
}
return str, convertStreamError(err, protocol.StreamTypeBidi, id.InitiatedBy())
}
panic("")
}
func (m *streamsMap) HandleMaxStreamsFrame(f *wire.MaxStreamsFrame) {
switch f.Type {
case protocol.StreamTypeUni:
m.outgoingUniStreams.SetMaxStream(f.MaxStreamNum)
case protocol.StreamTypeBidi:
m.outgoingBidiStreams.SetMaxStream(f.MaxStreamNum)
}
}
func (m *streamsMap) UpdateLimits(p *wire.TransportParameters) {
m.outgoingBidiStreams.UpdateSendWindow(p.InitialMaxStreamDataBidiRemote)
m.outgoingBidiStreams.SetMaxStream(p.MaxBidiStreamNum)
m.outgoingUniStreams.UpdateSendWindow(p.InitialMaxStreamDataUni)
m.outgoingUniStreams.SetMaxStream(p.MaxUniStreamNum)
}
func (m *streamsMap) CloseWithError(err error) {
m.outgoingBidiStreams.CloseWithError(err)
m.outgoingUniStreams.CloseWithError(err)
m.incomingBidiStreams.CloseWithError(err)
m.incomingUniStreams.CloseWithError(err)
}
// ResetFor0RTT resets is used when 0-RTT is rejected. In that case, the streams maps are
// 1. closed with an Err0RTTRejected, making calls to Open{Uni}Stream{Sync} / Accept{Uni}Stream return that error.
// 2. reset to their initial state, such that we can immediately process new incoming stream data.
// Afterwards, calls to Open{Uni}Stream{Sync} / Accept{Uni}Stream will continue to return the error,
// until UseResetMaps() has been called.
func (m *streamsMap) ResetFor0RTT() {
m.mutex.Lock()
defer m.mutex.Unlock()
m.reset = true
m.CloseWithError(Err0RTTRejected)
m.initMaps()
}
func (m *streamsMap) UseResetMaps() {
m.mutex.Lock()
m.reset = false
m.mutex.Unlock()
}