74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
/*
|
|
* Copyright (c) 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 (
|
|
"io"
|
|
"log"
|
|
"os"
|
|
|
|
"github.com/farsightsec/golang-framestream"
|
|
)
|
|
|
|
type FrameStreamOutput struct {
|
|
outputChannel chan []byte
|
|
wait chan bool
|
|
enc *framestream.Encoder
|
|
}
|
|
|
|
func NewFrameStreamOutput(w io.Writer) (o *FrameStreamOutput, err error) {
|
|
o = new(FrameStreamOutput)
|
|
o.outputChannel = make(chan []byte, outputChannelSize)
|
|
o.enc, err = framestream.NewEncoder(w, &framestream.EncoderOptions{ContentType: FSContentType})
|
|
if err != nil {
|
|
return
|
|
}
|
|
o.wait = make(chan bool)
|
|
return
|
|
}
|
|
|
|
func NewFrameStreamOutputFromFilename(fname string) (o *FrameStreamOutput, err error) {
|
|
if fname == "" || fname == "-" {
|
|
return NewFrameStreamOutput(os.Stdout)
|
|
}
|
|
w, err := os.Create(fname)
|
|
if err != nil {
|
|
return
|
|
}
|
|
return NewFrameStreamOutput(w)
|
|
}
|
|
|
|
func (o *FrameStreamOutput) GetOutputChannel() chan []byte {
|
|
return o.outputChannel
|
|
}
|
|
|
|
func (o *FrameStreamOutput) RunOutputLoop() {
|
|
for frame := range o.outputChannel {
|
|
if _, err := o.enc.Write(frame); err != nil {
|
|
log.Fatalf("framestream.Encoder.Write() failed: %s\n", err)
|
|
break
|
|
}
|
|
}
|
|
close(o.wait)
|
|
}
|
|
|
|
func (o *FrameStreamOutput) Close() {
|
|
close(o.outputChannel)
|
|
<-o.wait
|
|
o.enc.Flush()
|
|
o.enc.Close()
|
|
}
|