39 lines
810 B
Go
39 lines
810 B
Go
package main
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import (
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"bytes"
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"encoding/binary"
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"github.com/cilium/ebpf"
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"github.com/cilium/ebpf/perf"
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)
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func NewPerfEventReader(m *ebpf.Map, perCPUBufferSize int) (reader *PerfEventReader, err error) {
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reader = new(PerfEventReader)
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if reader.reader, err = perf.NewReader(m, perCPUBufferSize); err != nil {
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return nil, err
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} else {
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return reader, nil
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}
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}
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type PerfEventReader struct {
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reader *perf.Reader
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}
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func (r *PerfEventReader) Read() (*Packet, error) {
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var pkt observedPacket
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if rec, err := r.reader.Read(); err != nil {
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return nil, err
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} else {
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if err = binary.Read(bytes.NewReader(rec.RawSample), binary.LittleEndian, &pkt); err != nil {
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return nil, err
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} else {
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return pkt.ToPacket(), nil
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}
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}
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}
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func (r *PerfEventReader) Close() error {
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return r.reader.Close()
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}
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