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| package main | |
| import ( | |
| "bytes" | |
| "encoding/binary" | |
| //"encoding/hex" | |
| "fmt" | |
| "github.com/google/gopacket" | |
| "github.com/google/gopacket/layers" | |
| "github.com/google/gopacket/pcap" | |
| "log" | |
| "time" | |
| ) | |
| var ( | |
| device string = "wlan0" | |
| snapshotLen int32 = 1024 | |
| promiscuous bool = false | |
| err error | |
| timeout time.Duration = -1 * time.Second | |
| handle *pcap.Handle | |
| ) | |
| var ( | |
| serverIP string | |
| serverPort string | |
| clientIP string | |
| clientPort string | |
| ) | |
| func main() { | |
| // Open file instead of device | |
| handle, err = pcap.OpenOffline("2.pcapng") | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| defer handle.Close() | |
| /* | |
| // Open device | |
| handle, err = pcap.OpenLive(device, snapshotLen, promiscuous, timeout) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| defer handle.Close() | |
| */ | |
| packetSource := gopacket.NewPacketSource(handle, handle.LinkType()) | |
| for packet := range packetSource.Packets() { | |
| printPacketInfo(packet) | |
| } | |
| } | |
| func printPacketInfo(packet gopacket.Packet) { | |
| ipLayer := packet.Layer(layers.LayerTypeIPv4) | |
| var dstIP, srcIP string | |
| if ipLayer != nil { | |
| ip, _ := ipLayer.(*layers.IPv4) | |
| dstIP = ip.DstIP.String() | |
| srcIP = ip.SrcIP.String() | |
| } | |
| // Let's see if the packet is UDP | |
| udpLayer := packet.Layer(layers.LayerTypeUDP) | |
| if udpLayer != nil { | |
| udp, _ := udpLayer.(*layers.UDP) | |
| if serverIP == "" && len(udp.Payload) == 25 && udp.Payload[24] == 0x04 && udp.Payload[0] == 0x01 && udp.DstPort > 7000 && udp.DstPort < 8000 { | |
| fmt.Println("pubg game statrt!") | |
| fmt.Println("=================") | |
| serverIP = dstIP | |
| serverPort = udp.DstPort.String() | |
| clientIP = srcIP | |
| clientPort = udp.SrcPort.String() | |
| fmt.Printf("Server IP: %s\n", serverIP) | |
| fmt.Printf("Server UDP Port: %s\n", serverPort) | |
| fmt.Printf("Client IP: %s\n", clientIP) | |
| fmt.Printf("Client UDP Port: %s\n", clientPort) | |
| fmt.Println("=================") | |
| } | |
| if len(udp.Payload) == 44 { | |
| parseLocalPosition(udp) | |
| } | |
| } | |
| } | |
| func parseLocalPosition(udp *layers.UDP) { | |
| size := len(udp.Payload) | |
| x := udp.Payload[size-12 : size-8] | |
| y := udp.Payload[size-8 : size-4] | |
| z := udp.Payload[size-4:] | |
| x_buf := bytes.NewBuffer(x) | |
| y_buf := bytes.NewBuffer(y) | |
| z_buf := bytes.NewBuffer(z) | |
| var xInt, yInt, zInt int16 | |
| binary.Read(x_buf, binary.LittleEndian, &xInt) | |
| binary.Read(y_buf, binary.LittleEndian, &yInt) | |
| binary.Read(z_buf, binary.LittleEndian, &zInt) | |
| fmt.Printf("location: X:%d Y:%d Z %d\n", xInt, yInt, zInt) | |
| } |
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