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/
ebpf_data.go
102 lines (86 loc) · 2.69 KB
/
ebpf_data.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 exec
import (
"bytes"
"encoding/binary"
"fmt"
"time"
"unsafe"
"github.com/andrewkroh/go-ebpf/common"
)
var (
sizeofExecveData = int(unsafe.Sizeof(ExecveData{}))
sizeofExecveArg = int(unsafe.Sizeof(ExecveArg{}))
sizeofExecveRtn = int(unsafe.Sizeof(ExecveRtn{}))
sizeofExitData = int(unsafe.Sizeof(ExitData{}))
)
type ExecveData struct {
KTimeNS time.Duration
RealStartTimeNS time.Duration
PID uint32
UID uint32
GID uint32
PPID uint32
Comm [16]byte
}
func (e ExecveData) String() string {
return fmt.Sprintf("ktime:%d, real_start_time:%d, pid:%d, uid:%d, gid:%d, ppid:%d, comm:%s",
e.KTimeNS, e.RealStartTimeNS, e.PID, e.UID, e.GID, e.PPID, common.NullTerminatedString(e.Comm[:]))
}
type ExecveArg struct {
PID uint32
_ uint32
Arg [256]byte
}
func (e ExecveArg) String() string {
return fmt.Sprintf("pid:%d, arg:%s", e.PID, common.NullTerminatedString(e.Arg[:]))
}
type ExecveRtn struct {
PID uint32
ReturnCode int32
}
func (e ExecveRtn) String() string {
return fmt.Sprintf("pid:%d, rtn:%d", e.PID, e.ReturnCode)
}
type ExitData struct {
KTime uint64
PID uint32
}
func (e ExitData) String() string {
return fmt.Sprintf("ktime:%d, pid:%d", e.KTime, e.PID)
}
func unmarshalData(data []byte) (ExecveData, error) {
var event ExecveData
err := binary.Read(bytes.NewReader(data), binary.LittleEndian, &event)
return event, err
}
func unmarshalArg(data []byte) (ExecveArg, error) {
var event ExecveArg
err := binary.Read(bytes.NewReader(data), binary.LittleEndian, &event)
return event, err
}
func unmarshalRtn(data []byte) (ExecveRtn, error) {
var event ExecveRtn
err := binary.Read(bytes.NewReader(data), binary.LittleEndian, &event)
return event, err
}
func unmarshalExitData(data []byte) (ExitData, error) {
var event ExitData
err := binary.Read(bytes.NewReader(data), binary.LittleEndian, &event)
return event, err
}