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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| package wireguard | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "runtime" | ||
| "strings" | ||
|
|
||
| "github.com/google/gopacket" | ||
| "github.com/google/gopacket/layers" | ||
| "github.com/in4it/wireguard-server/pkg/logging" | ||
| "github.com/in4it/wireguard-server/pkg/storage" | ||
| "github.com/packetcap/go-pcap" | ||
| ) | ||
|
|
||
| func RunPacketLogger(storage storage.Iface) { | ||
| useSyscalls := false | ||
| if runtime.GOOS == "darwin" { | ||
| useSyscalls = true | ||
| } | ||
| handle, err := pcap.OpenLive("en0" /*VPN_INTERFACE_NAME */, 1600, true, 0, useSyscalls) | ||
| if err != nil { | ||
| logging.ErrorLog(fmt.Errorf("can't start packet inspector: %s", err)) | ||
| } | ||
| for { | ||
| err := readPacket(handle) | ||
| if err != nil { | ||
| logging.DebugLog(fmt.Errorf("readPacket error: %s", err)) | ||
| } | ||
| } | ||
| } | ||
| func readPacket(handle *pcap.Handle) error { | ||
| data, _, err := handle.ReadPacketData() | ||
| if err != nil { | ||
| return fmt.Errorf("read packet error: %s", err) | ||
| } | ||
|
|
||
| packet := gopacket.NewPacket(data, layers.LayerTypeEthernet, gopacket.Lazy) | ||
| if udpLayer := packet.Layer(layers.LayerTypeUDP); udpLayer != nil { | ||
| udp, _ := udpLayer.(*layers.UDP) | ||
|
|
||
| if udp.NextLayerType().Contains(layers.LayerTypeDNS) { | ||
| dnsPacket := packet.Layer(layers.LayerTypeDNS) | ||
| if dnsPacket != nil { | ||
| udpDNS := dnsPacket.(*layers.DNS) | ||
| questions := []string{} | ||
| for k := range udpDNS.Questions { | ||
| found := false | ||
| for _, question := range questions { | ||
| if question == string(udpDNS.Questions[k].Name) { | ||
| found = true | ||
| } | ||
| } | ||
| if !found { | ||
| questions = append(questions, string(udpDNS.Questions[k].Name)) | ||
| } | ||
|
|
||
| } | ||
| fmt.Printf("DNS Req: %s\n", strings.Join(questions, ", ")) | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
|
||
| return nil | ||
| } |