/
fileprovider.go
43 lines (35 loc) · 1.03 KB
/
fileprovider.go
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package packetprovider
import (
"fmt"
"os"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
"github.com/google/gopacket/pcapgo"
"github.com/rmedvedev/grpcdump/internal/app/filter"
)
//FileProvider ...
type FileProvider struct {
reader *pcapgo.Reader
}
//NewFileProvider ...
func NewFileProvider(filename string) (PacketProvider, error) {
reader, err := os.Open(filename)
if err != nil {
return nil, fmt.Errorf("Failed to open file: %s", err.Error())
}
pcapgoReader, err := pcapgo.NewReader(reader)
if err != nil {
return nil, fmt.Errorf("Failed to create pcapgo reader: %s", err.Error())
}
return &FileProvider{pcapgoReader}, nil
}
//SetFilter sets bpf filter
func (provider *FileProvider) SetFilter(packetFilter *filter.PacketFilter) (err error) {
//we cant attach bpf filter
return
}
//GetPackets return channel for get packets
func (provider *FileProvider) GetPackets() chan gopacket.Packet {
packetSource := gopacket.NewPacketSource(provider.reader, layers.LayerTypeLoopback)
return packetSource.Packets()
}