compute addresses

src/client.go

@@ -203,6 +203,7 @@ func (c *Croc) processState(cd channelData) (err error) {
 	// copy over the rest of the state
 	c.cs.channel.Ports = cd.Ports
 	c.cs.channel.EncryptedFileMetaData = cd.EncryptedFileMetaData
+	c.cs.channel.Addresses = cd.Addresses
 
 	// update the Pake
 	if cd.Pake != nil && cd.Pake.Role != c.cs.channel.Role {

src/models.go

@@ -128,6 +128,8 @@ type channelData struct {
 	ReadyToRead bool `json:"ready_to_read"`
 	// Error is sent if there is an error
 	Error string `json:"error"`
+	// Addresses of the sender and recipient, as determined by the relay
+	Addresses [2]string `json:"addresses"`
 
 	// Sent on initialization, specific to a single user
 	// UUID is sent out only to one person at a time

src/server.go

@@ -149,6 +149,8 @@ func (c *Croc) joinChannel(ws *websocket.Conn, cd channelData) (channel string,
 		c.rs.channel[cd.Channel].Curve = "p256"
 	}
 	c.rs.channel[cd.Channel].websocketConn[cd.Role] = ws
+	// assign the name
+	c.rs.channel[cd.Channel].Addresses[cd.Role] = ws.RemoteAddr().String()
 
 	log.Debugf("assigned role %d in channel '%s'", cd.Role, cd.Channel)
 	return