99 lines
3.4 KiB
Go
99 lines
3.4 KiB
Go
|
package peer
|
||
|
|
||
|
import (
|
||
|
"git.openprivacy.ca/openprivacy/libricochet-go/channels"
|
||
|
"git.openprivacy.ca/openprivacy/libricochet-go/utils"
|
||
|
"git.openprivacy.ca/openprivacy/libricochet-go/wire/control"
|
||
|
)
|
||
|
|
||
|
// CwtchPeerDataChannel implements the ChannelHandler interface for a channel of
|
||
|
// type "im.cwtch.peer.data The channel may be inbound or outbound.
|
||
|
//
|
||
|
// CwtchPeerChannel implements protocol-level sanity and state validation, but
|
||
|
// does not handle or acknowledge Cwtch messages. The application must provide
|
||
|
// a CwtchPeerChannelHandler implementation to handle Cwtch events.
|
||
|
type CwtchPeerDataChannel struct {
|
||
|
// Methods of Handler are called for Cwtch events on this channel
|
||
|
Handler CwtchPeerDataHandler
|
||
|
channel *channels.Channel
|
||
|
}
|
||
|
|
||
|
// CwtchPeerDataHandler is implemented by an application type to receive
|
||
|
// events from a CwtchPeerChannel.
|
||
|
type CwtchPeerDataHandler interface {
|
||
|
HandlePacket([]byte) []byte
|
||
|
}
|
||
|
|
||
|
// SendMessage sends a raw message on this channel
|
||
|
func (cpc *CwtchPeerDataChannel) SendMessage(data []byte) {
|
||
|
cpc.channel.SendMessage(data)
|
||
|
}
|
||
|
|
||
|
// Type returns the type string for this channel, e.g. "im.ricochet.Cwtch".
|
||
|
func (cpc *CwtchPeerDataChannel) Type() string {
|
||
|
return "im.cwtch.peer.data"
|
||
|
}
|
||
|
|
||
|
// Closed is called when the channel is closed for any reason.
|
||
|
func (cpc *CwtchPeerDataChannel) Closed(err error) {
|
||
|
|
||
|
}
|
||
|
|
||
|
// OnlyClientCanOpen - for Cwtch channels any side can open
|
||
|
func (cpc *CwtchPeerDataChannel) OnlyClientCanOpen() bool {
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// Singleton - for Cwtch channels there can only be one instance per direction
|
||
|
func (cpc *CwtchPeerDataChannel) Singleton() bool {
|
||
|
return true
|
||
|
}
|
||
|
|
||
|
// Bidirectional - for Cwtch channels are bidirectional
|
||
|
func (cpc *CwtchPeerDataChannel) Bidirectional() bool {
|
||
|
return true
|
||
|
}
|
||
|
|
||
|
// RequiresAuthentication - Cwtch channels require hidden service auth
|
||
|
func (cpc *CwtchPeerDataChannel) RequiresAuthentication() string {
|
||
|
return "im.ricochet.auth.hidden-service"
|
||
|
}
|
||
|
|
||
|
// OpenInbound is the first method called for an inbound channel request.
|
||
|
// If an error is returned, the channel is rejected. If a RawMessage is
|
||
|
// returned, it will be sent as the ChannelResult message.
|
||
|
func (cpc *CwtchPeerDataChannel) OpenInbound(channel *channels.Channel, raw *Protocol_Data_Control.OpenChannel) ([]byte, error) {
|
||
|
cpc.channel = channel
|
||
|
messageBuilder := new(utils.MessageBuilder)
|
||
|
return messageBuilder.AckOpenChannel(channel.ID), nil
|
||
|
}
|
||
|
|
||
|
// OpenOutbound is the first method called for an outbound channel request.
|
||
|
// If an error is returned, the channel is not opened. If a RawMessage is
|
||
|
// returned, it will be sent as the OpenChannel message.
|
||
|
func (cpc *CwtchPeerDataChannel) OpenOutbound(channel *channels.Channel) ([]byte, error) {
|
||
|
cpc.channel = channel
|
||
|
messageBuilder := new(utils.MessageBuilder)
|
||
|
return messageBuilder.OpenChannel(channel.ID, cpc.Type()), nil
|
||
|
}
|
||
|
|
||
|
// OpenOutboundResult is called when a response is received for an
|
||
|
// outbound OpenChannel request. If `err` is non-nil, the channel was
|
||
|
// rejected and Closed will be called immediately afterwards. `raw`
|
||
|
// contains the raw protocol message including any extension data.
|
||
|
func (cpc *CwtchPeerDataChannel) OpenOutboundResult(err error, crm *Protocol_Data_Control.ChannelResult) {
|
||
|
if err == nil {
|
||
|
if crm.GetOpened() {
|
||
|
cpc.channel.Pending = false
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Packet is called for each raw packet received on this channel.
|
||
|
func (cpc *CwtchPeerDataChannel) Packet(data []byte) {
|
||
|
ret := cpc.Handler.HandlePacket(data)
|
||
|
if len(ret) >= 0 {
|
||
|
cpc.channel.SendMessage(ret)
|
||
|
}
|
||
|
}
|