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package internal
import "C"
import (
"bytes"
"encoding/binary"
"fmt"
. "ioriotng/internal/generated/types"
bpf "github.com/aquasecurity/libbpfgo"
)
type openFile struct {
fd int32
path string
}
func (o openFile) String() string {
return fmt.Sprintf("(%d) %s", o.fd, o.path)
}
func binaryCompare(ev *OpenEnterEvent, raw []byte) {
buf := new(bytes.Buffer)
if err := binary.Write(buf, binary.LittleEndian, *ev); err != nil {
panic(err)
}
bytes := buf.Bytes()
fmt.Println("bytes", bytes)
fmt.Println("raw ", raw)
}
func eventLoop(bpfModule *bpf.Module, ch <-chan []byte) {
enterOpen := make(map[uint32]*OpenEnterEvent)
enterFd := make(map[uint32]*FdEvent)
openFdMap := make(map[int32]openFile)
for raw := range ch {
switch OpId(raw[0]) {
case OPENAT_ENTER_OP_ID:
fallthrough
case OPEN_ENTER_OP_ID:
ev := NewOpenEnterEvent(raw)
enterOpen[ev.Tid] = ev
case OPENAT_EXIT_OP_ID:
fallthrough
case OPEN_EXIT_OP_ID:
ev := NewFdEvent(raw)
enterEv, ok := enterOpen[ev.Tid]
if !ok {
ev.Recycle()
continue
}
file := openFile{
fd: ev.Fd,
path: string(enterEv.Filename[:]),
}
openFdMap[ev.Fd] = file
duration := float64(ev.Time-enterEv.Time) / float64(1_000_000)
fmt.Println(duration, "ms", "opened", file)
delete(enterOpen, ev.Tid)
ev.Recycle()
enterEv.Recycle()
case CLOSE_ENTER_OP_ID:
fallthrough
case WRITE_ENTER_OP_ID:
fallthrough
case WRITEV_ENTER_OP_ID:
ev := NewFdEvent(raw)
if _, ok := openFdMap[ev.Fd]; !ok {
// File open not traced (todo: read from procfs?)
ev.Recycle()
continue
}
enterFd[ev.Tid] = ev
case CLOSE_EXIT_OP_ID:
ev := NewNullEvent(raw)
enterEv, ok := enterFd[ev.Tid]
if !ok {
ev.Recycle()
continue
}
duration := float64(ev.Time-enterEv.Time) / float64(1_000_000)
file, _ := openFdMap[enterEv.Fd]
fmt.Println(duration, "ms", "closed", file)
delete(openFdMap, enterEv.Fd)
delete(enterFd, ev.Tid)
ev.Recycle()
enterEv.Recycle()
case WRITE_EXIT_OP_ID:
fallthrough
case WRITEV_EXIT_OP_ID:
ev := NewNullEvent(raw)
enterEv, ok := enterFd[ev.Tid]
if !ok {
ev.Recycle()
continue
}
duration := float64(ev.Time-enterEv.Time) / float64(1_000_000)
if file, ok := openFdMap[enterEv.Fd]; ok {
fmt.Println(duration, "ms", "wrote", file)
}
delete(enterFd, ev.Tid)
ev.Recycle()
enterEv.Recycle()
default:
panic(fmt.Sprintf("UNKNOWN Ringbuf data received len:%d raw:%v", len(raw), raw))
}
}
fmt.Println("Good bye")
}
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