/
datapath_recorder.go
53 lines (48 loc) · 1.41 KB
/
datapath_recorder.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
// Copyright 2021 Authors of Cilium
//
// 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 monitor
import (
"bufio"
"fmt"
"os"
)
const (
// RecorderCaptureLen is the amount of data in the RecorderCapture message
RecorderCaptureLen = 24
)
// RecorderCapture is the message format of a pcap capture in the bpf ring buffer
type RecorderCapture struct {
Type uint8
SubType uint8
RuleID uint16
Reserved uint32
TimeBoot uint64
CapLen uint32
Len uint32
// data
}
// DumpInfo prints a summary of the recorder notify messages.
func (n *RecorderCapture) DumpInfo(data []byte) {
buf := bufio.NewWriter(os.Stdout)
dir := "egress"
if n.SubType == 1 {
dir = "ingress"
}
fmt.Fprintf(buf, "Recorder capture: dir:%s rule:%d ts:%d caplen:%d len:%d\n",
dir, int(n.RuleID), int(n.TimeBoot), int(n.CapLen), int(n.Len))
buf.Flush()
Dissect(true, data[RecorderCaptureLen:])
fmt.Fprintf(buf, "----\n")
buf.Flush()
}