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recorder.go
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recorder.go
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// 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 recorder
import (
"strings"
"github.com/cilium/cilium/pkg/bpf"
)
const (
// MapNameWcard4 represents IPv4 capture wildcard table.
MapNameWcard4 = "cilium_capture4_rules"
// MapNameWcard6 represents IPv6 capture wildcard table.
MapNameWcard6 = "cilium_capture6_rules"
// MapSize is the default size of the v4 and v6 maps
MapSize = 16384
)
type CaptureRule struct {
RuleId uint16 `align:"rule_id"`
Reserved uint16 `align:"reserved"`
CapLen uint32 `align:"cap_len"`
}
type CaptureMap interface {
Open() error
Close() error
Path() (string, error)
DumpEntries() (string, error)
DumpWithCallback(bpf.DumpCallback) error
}
type Map struct {
bpf.Map
v4 bool
}
type RecorderKey interface {
bpf.MapKey
ToHost() RecorderKey
Dump(sb *strings.Builder)
Map() *bpf.Map
}
type RecorderEntry interface {
bpf.MapValue
Dump(sb *strings.Builder)
}
type MapRecord struct {
Key RecorderKey
Value RecorderEntry
}
func (m *Map) DumpEntries() (string, error) {
var sb strings.Builder
cb := func(k bpf.MapKey, v bpf.MapValue) {
key := k.(RecorderKey)
key.ToHost().Dump(&sb)
val := v.(RecorderEntry)
val.Dump(&sb)
}
err := m.DumpWithCallback(cb)
return sb.String(), err
}