73 lines
2 KiB
Go
73 lines
2 KiB
Go
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// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// +build linux
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package sniffer
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import (
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"time"
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"github.com/tsg/gopacket"
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"github.com/tsg/gopacket/afpacket"
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"github.com/tsg/gopacket/layers"
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)
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type afpacketHandle struct {
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TPacket *afpacket.TPacket
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}
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func newAfpacketHandle(device string, snaplen int, block_size int, num_blocks int,
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timeout time.Duration) (*afpacketHandle, error) {
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h := &afpacketHandle{}
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var err error
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if device == "any" {
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h.TPacket, err = afpacket.NewTPacket(
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afpacket.OptFrameSize(snaplen),
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afpacket.OptBlockSize(block_size),
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afpacket.OptNumBlocks(num_blocks),
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afpacket.OptPollTimeout(timeout))
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} else {
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h.TPacket, err = afpacket.NewTPacket(
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afpacket.OptInterface(device),
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afpacket.OptFrameSize(snaplen),
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afpacket.OptBlockSize(block_size),
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afpacket.OptNumBlocks(num_blocks),
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afpacket.OptPollTimeout(timeout))
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}
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return h, err
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}
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func (h *afpacketHandle) ReadPacketData() (data []byte, ci gopacket.CaptureInfo, err error) {
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return h.TPacket.ReadPacketData()
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}
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func (h *afpacketHandle) SetBPFFilter(expr string) (_ error) {
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return h.TPacket.SetBPFFilter(expr)
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}
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func (h *afpacketHandle) LinkType() layers.LinkType {
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return layers.LinkTypeEthernet
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}
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func (h *afpacketHandle) Close() {
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h.TPacket.Close()
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}
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