Improve compatibility checking

- added CompatibilityError to api package to represent error with
  list of incompatible messages
- added UnknownMsgError to adapter package to represent error for
  unknown message
- added list of registered message types

Change-Id: I2623b45135521d52612ba91e4605fc064a7fc76e
Signed-off-by: Ondrej Fabry <ofabry@cisco.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/adapter/socketclient/socketclient.go b/adapter/socketclient/socketclient.go
index 043d253..366163f 100644
--- a/adapter/socketclient/socketclient.go
+++ b/adapter/socketclient/socketclient.go
@@ -419,7 +419,7 @@ func (c *vppClient) GetMsgID(msgName string, msgCrc string) (uint16, error) {
 	msg := msgName + "_" + msgCrc
 	msgID, ok := c.msgTable[msg]
 	if !ok {
-		return 0, fmt.Errorf("unknown message: %q", msg)
+		return 0, &adapter.UnknownMsgError{msgName, msgCrc}
 	}
 	return msgID, nil
 }