45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package netshovel
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import (
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"flag"
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"log"
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"github.com/google/gopacket"
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"github.com/google/gopacket/layers"
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"github.com/google/gopacket/pcap"
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"github.com/google/gopacket/tcpassembly"
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)
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func Shovel(factory tcpassembly.StreamFactory) {
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//verbose := flag.Bool("verbose", false, "Write lots of information out")
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flag.Parse()
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streamPool := tcpassembly.NewStreamPool(factory)
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assembler := tcpassembly.NewAssembler(streamPool)
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for _, fn := range flag.Args() {
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handle, err := pcap.OpenOffline(fn)
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if err != nil {
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log.Fatal(err)
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}
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packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
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packets := packetSource.Packets()
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npackets := 0
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for packet := range packets {
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if packet == nil {
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break
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}
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if packet.NetworkLayer() == nil || packet.TransportLayer() == nil || packet.TransportLayer().LayerType() != layers.LayerTypeTCP {
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log.Println("Unusable packet")
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continue
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}
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tcp := packet.TransportLayer().(*layers.TCP)
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assembler.AssembleWithTimestamp(packet.NetworkLayer().NetworkFlow(), tcp, packet.Metadata().Timestamp)
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npackets += 1
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}
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log.Println("npackets", npackets)
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}
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assembler.FlushAll()
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StreamWG.Wait()
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}
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