net: implement ECN handling, rfc6040 stylefd/propagate-DSCP-bits

To decide whether we should use the compatibility mode or the normal
mode with a peer, we use the handshake messages as a signaling channel.

If we receive the expected ECN bits, it most likely means they're
running a compatible version.

Signed-off-by: Florent Daigniere <nextgens@freenetproject.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/conn.go b/conn.go
index b8970e7..e38160a 100644
--- a/conn.go
+++ b/conn.go
@@ -20,8 +20,8 @@ const (
  */
 type Bind interface {
 	SetMark(value uint32) error
-	ReceiveIPv6(buff []byte) (int, Endpoint, error)
-	ReceiveIPv4(buff []byte) (int, Endpoint, error)
+	ReceiveIPv6(buff []byte) (int, Endpoint, byte, error)
+	ReceiveIPv4(buff []byte) (int, Endpoint, byte, error)
 	Send(buff []byte, end Endpoint, tos byte) error
 	Close() error
 }