forked from cwtch.im/cwtch
86 lines
3.1 KiB
Go
86 lines
3.1 KiB
Go
package listen
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import (
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"cwtch.im/cwtch/protocol"
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"errors"
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"git.openprivacy.ca/openprivacy/libricochet-go/channels"
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"git.openprivacy.ca/openprivacy/libricochet-go/utils"
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"git.openprivacy.ca/openprivacy/libricochet-go/wire/control"
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"github.com/golang/protobuf/proto"
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)
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// CwtchServerListenChannel implements the ChannelHandler interface for a channel of
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// type "im.cwtch.server.listen" - this implementation only handles server side logic.
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type CwtchServerListenChannel struct {
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channel *channels.Channel
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}
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// Type returns the type string for this channel, e.g. "im.ricochet.Cwtch".
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func (cc *CwtchServerListenChannel) Type() string {
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return "im.cwtch.server.listen"
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}
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// Closed is called when the channel is closed for any reason.
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func (cc *CwtchServerListenChannel) Closed(err error) {
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}
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// OnlyClientCanOpen - for Cwtch channels any side can open
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func (cc *CwtchServerListenChannel) OnlyClientCanOpen() bool {
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return true
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}
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// Singleton - for Cwtch channels there can only be one instance per direction
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func (cc *CwtchServerListenChannel) Singleton() bool {
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return true
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}
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// Bidirectional - for Cwtch channels are not bidrectional
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func (cc *CwtchServerListenChannel) Bidirectional() bool {
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return false
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}
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// RequiresAuthentication - Cwtch channels require hidden service auth
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func (cc *CwtchServerListenChannel) RequiresAuthentication() string {
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return "none"
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}
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// OpenInbound is the first method called for an inbound channel request.
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// If an error is returned, the channel is rejected. If a RawMessage is
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// returned, it will be sent as the ChannelResult message.
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func (cc *CwtchServerListenChannel) OpenInbound(channel *channels.Channel, raw *Protocol_Data_Control.OpenChannel) ([]byte, error) {
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cc.channel = channel
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messageBuilder := new(utils.MessageBuilder)
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return messageBuilder.AckOpenChannel(channel.ID), nil
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}
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// OpenOutbound is the first method called for an outbound channel request.
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// If an error is returned, the channel is not opened. If a RawMessage is
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// returned, it will be sent as the OpenChannel message.
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func (cc *CwtchServerListenChannel) OpenOutbound(channel *channels.Channel) ([]byte, error) {
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return nil, errors.New("server does not open listen channels")
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}
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// OpenOutboundResult is called when a response is received for an
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// outbound OpenChannel request. If `err` is non-nil, the channel was
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// rejected and Closed will be called immediately afterwards. `raw`
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// contains the raw protocol message including any extension data.
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func (cc *CwtchServerListenChannel) OpenOutboundResult(err error, crm *Protocol_Data_Control.ChannelResult) {
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// NOTE: Should never be called
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}
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// SendGroupMessage sends a single group message to the peer
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func (cc *CwtchServerListenChannel) SendGroupMessage(gm *protocol.GroupMessage) {
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csp := &protocol.CwtchServerPacket{
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GroupMessage: gm,
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}
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packet, _ := proto.Marshal(csp)
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cc.channel.SendMessage(packet)
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}
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// Packet is called for each raw packet received on this channel.
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func (cc *CwtchServerListenChannel) Packet(data []byte) {
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// If we receive a packet on this channel, close the connection
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cc.channel.CloseChannel()
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}
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