Number of fixes in response to code review

This version cannot complete a handshake.
The program will panic upon receiving any message on the UDP socket.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/tun.go b/src/tun.go
index d782bd5..1c4c281 100644
--- a/src/tun.go
+++ b/src/tun.go
@@ -6,10 +6,19 @@ package main
 
 const DefaultMTU = 1420
 
+type TUNEvent int
+
+const (
+	TUNEventUp = 1 << iota
+	TUNEventDown
+	TUNEventMTUUpdate
+)
+
 type TUNDevice interface {
 	Read([]byte) (int, error)  // read a packet from the device (without any additional headers)
 	Write([]byte) (int, error) // writes a packet to the device (without any additional headers)
-	IsUp() (bool, error)       // is the interface up?
 	MTU() (int, error)         // returns the MTU of the device
 	Name() string              // returns the current name
+	Events() chan TUNEvent     // returns a constant channel of events related to the device
+	Close() error              // stops the device and closes the event channel
 }