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send connection parameters in CHLO

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This commit is contained in:
Marten Seemann
2016-12-09 17:42:26 +07:00
parent 1ad3a85f5c
commit f72fbc57a9
9 changed files with 150 additions and 35 deletions
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52
handshake/connection_parameters_manager.go
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@@ -14,7 +14,8 @@ import (
// ConnectionParametersManager negotiates and stores the connection parameters
type ConnectionParametersManager interface {
SetFromMap(map[Tag][]byte) error
GetSHLOMap() map[Tag][]byte
GetSHLOMap() (map[Tag][]byte, error)
GetCHLOMap() (map[Tag][]byte, error)
GetSendStreamFlowControlWindow() protocol.ByteCount
GetSendConnectionFlowControlWindow() protocol.ByteCount
@@ -29,7 +30,8 @@ type ConnectionParametersManager interface {
type connectionParametersManager struct {
mutex sync.RWMutex
version protocol.VersionNumber
version protocol.VersionNumber
perspective protocol.Perspective
flowControlNegotiated bool
hasReceivedMaxIncomingDynamicStreams bool
@@ -55,8 +57,9 @@ var (
)
// NewConnectionParamatersManager creates a new connection parameters manager
func NewConnectionParamatersManager(v protocol.VersionNumber) ConnectionParametersManager {
func NewConnectionParamatersManager(pers protocol.Perspective, v protocol.VersionNumber) ConnectionParametersManager {
return &connectionParametersManager{
perspective: pers,
version: v,
idleConnectionStateLifetime: protocol.DefaultIdleTimeout,
sendStreamFlowControlWindow: protocol.InitialStreamFlowControlWindow, // can only be changed by the client
@@ -142,8 +145,13 @@ func (h *connectionParametersManager) negotiateIdleConnectionStateLifetime(clien
return utils.MinDuration(clientValue, protocol.MaxIdleTimeout)
}
// GetSHLOMap gets all values (except crypto values) needed for the SHLO
func (h *connectionParametersManager) GetSHLOMap() map[Tag][]byte {
// GetSHLOMap gets all parameters needed for the SHLO
// if the client sent us parameters earlier, these are the negotiated values
func (h *connectionParametersManager) GetSHLOMap() (map[Tag][]byte, error) {
if h.perspective != protocol.PerspectiveServer {
return nil, errors.New("ConnectionParametersManager BUG: GetSHLOMap should only be called for a server")
}
sfcw := bytes.NewBuffer([]byte{})
utils.WriteUint32(sfcw, uint32(h.GetReceiveStreamFlowControlWindow()))
cfcw := bytes.NewBuffer([]byte{})
@@ -166,7 +174,39 @@ func (h *connectionParametersManager) GetSHLOMap() map[Tag][]byte {
tags[TagMIDS] = mids.Bytes()
}
return tags
return tags, nil
}
// GetCHLOMap gets all parameters needed for the CHLO
// these are the values the client is suggesting to the server. The negotiation is done by the server
func (h *connectionParametersManager) GetCHLOMap() (map[Tag][]byte, error) {
if h.perspective != protocol.PerspectiveClient {
return nil, errors.New("ConnectionParametersManager BUG: GetCHLOMap should only be called for a client")
}
sfcw := bytes.NewBuffer([]byte{})
utils.WriteUint32(sfcw, uint32(protocol.InitialStreamFlowControlWindow))
cfcw := bytes.NewBuffer([]byte{})
utils.WriteUint32(cfcw, uint32(protocol.InitialConnectionFlowControlWindow))
mspc := bytes.NewBuffer([]byte{})
utils.WriteUint32(mspc, protocol.MaxStreamsPerConnection)
icsl := bytes.NewBuffer([]byte{})
utils.WriteUint32(icsl, uint32(protocol.DefaultIdleTimeout/time.Second))
tags := map[Tag][]byte{
TagICSL: icsl.Bytes(),
TagMSPC: mspc.Bytes(),
TagCFCW: cfcw.Bytes(),
TagSFCW: sfcw.Bytes(),
}
if h.version > protocol.Version34 {
mids := bytes.NewBuffer([]byte{})
utils.WriteUint32(mids, protocol.MaxIncomingDynamicStreamsPerConnection)
tags[TagMIDS] = mids.Bytes()
}
return tags, nil
}
// GetSendStreamFlowControlWindow gets the size of the stream-level flow control window for sending data