WIP: middleware/dnstap (#711)

middleware/dnstap add

vendor/github.com/dnstap/golang-dnstap/FrameStreamSockInput.go

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2013-2014 by Farsight Security, Inc.
+ *
+ * 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 dnstap
+
+import (
+	"log"
+	"net"
+	"os"
+)
+
+type FrameStreamSockInput struct {
+	wait     chan bool
+	listener net.Listener
+}
+
+func NewFrameStreamSockInput(listener net.Listener) (input *FrameStreamSockInput) {
+	input = new(FrameStreamSockInput)
+	input.listener = listener
+	return
+}
+
+func NewFrameStreamSockInputFromPath(socketPath string) (input *FrameStreamSockInput, err error) {
+	os.Remove(socketPath)
+	listener, err := net.Listen("unix", socketPath)
+	if err != nil {
+		return
+	}
+	return NewFrameStreamSockInput(listener), nil
+}
+
+func (input *FrameStreamSockInput) ReadInto(output chan []byte) {
+	for {
+		conn, err := input.listener.Accept()
+		if err != nil {
+			log.Printf("net.Listener.Accept() failed: %s\n", err)
+			continue
+		}
+		i, err := NewFrameStreamInput(conn, true)
+		if err != nil {
+			log.Printf("dnstap.NewFrameStreamInput() failed: %s\n", err)
+			continue
+		}
+		log.Printf("dnstap.FrameStreamSockInput: accepted a socket connection\n")
+		go i.ReadInto(output)
+	}
+}
+
+func (input *FrameStreamSockInput) Wait() {
+	select {}
+}