41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
/*
|
|
Copyright 2024 Josh Deprez
|
|
|
|
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 atalk
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/google/gopacket/pcap"
|
|
)
|
|
|
|
const DDPExtHeaderSize = 13
|
|
|
|
// StartPcap opens an AppleTalk and AARP listening session on a network device.
|
|
func StartPcap(device string) (*pcap.Handle, error) {
|
|
handle, err := pcap.OpenLive(device, 4096, true, 100*time.Millisecond)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("opening device %q: %w", device, err)
|
|
}
|
|
|
|
if err := handle.SetBPFFilter("atalk or aarp"); err != nil {
|
|
handle.Close()
|
|
return nil, fmt.Errorf("setting BPF filter: %w", err)
|
|
}
|
|
|
|
return handle, nil
|
|
}
|