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/*
* 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 (
"io"
"log"
"os"
"github.com/farsightsec/golang-framestream"
)
type FrameStreamInput struct {
wait chan bool
decoder *framestream.Decoder
}
func NewFrameStreamInput(r io.ReadWriter, bi bool) (input *FrameStreamInput, err error) {
input = new(FrameStreamInput)
decoderOptions := framestream.DecoderOptions{
ContentType: FSContentType,
Bidirectional: bi,
}
input.decoder, err = framestream.NewDecoder(r, &decoderOptions)
if err != nil {
return
}
input.wait = make(chan bool)
return
}
func NewFrameStreamInputFromFilename(fname string) (input *FrameStreamInput, err error) {
file, err := os.Open(fname)
if err != nil {
return nil, err
}
input, err = NewFrameStreamInput(file, false)
return
}
func (input *FrameStreamInput) ReadInto(output chan []byte) {
for {
buf, err := input.decoder.Decode()
if err != nil {
if err != io.EOF {
log.Printf("framestream.Decoder.Decode() failed: %s\n", err)
}
break
}
newbuf := make([]byte, len(buf))
copy(newbuf, buf)
output <- newbuf
}
close(input.wait)
}
func (input *FrameStreamInput) Wait() {
<-input.wait
}
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