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-rw-r--r--adapter/vpp_api.go47
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+// Copyright (c) 2017 Cisco and/or its affiliates.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package adapter
+
+import (
+ "errors"
+)
+
+// ErrNotImplemented is an error returned when missing implementation.
+var ErrNotImplemented = errors.New("not implemented for this OS")
+
+// MsgCallback defines func signature for message callback.
+type MsgCallback func(msgID uint16, data []byte)
+
+// VppAPI provides connection to VPP binary API.
+// It is responsible for sending and receiving of binary-encoded messages to/from VPP.
+type VppAPI interface {
+ // Connect connects the process to VPP.
+ Connect() error
+
+ // Disconnect disconnects the process from VPP.
+ Disconnect() error
+
+ // GetMsgID returns a runtime message ID for the given message name and CRC.
+ GetMsgID(msgName string, msgCrc string) (msgID uint16, err error)
+
+ // SendMsg sends a binary-encoded message to VPP.
+ SendMsg(context uint32, data []byte) error
+
+ // SetMsgCallback sets a callback function that will be called by the adapter whenever a message comes from VPP.
+ SetMsgCallback(cb MsgCallback)
+
+ // WaitReady waits until adapter is ready.
+ WaitReady() error
+}