參考連結：

https://blog.csdn.net/warrior_0319/article/details/83150408

https://cloud.tencent.com/developer/article/1025427

demo1：獲取所有的網路裝置資訊

package main

import (
        "fmt"
        "github.com/google/gopacket/pcap"
        "log"
)

func main() {
        // Find all devices
        devices, err := pcap.FindAllDevs()
        
 
if err != nil {
                log.Fatal(err)
        }

        // Print device information
        fmt.Println("Devices found:")
        for _, device := range devices {
                fmt.Println("\nName: ", device.Name)
                fmt.Println("Description: ", device.Description)
                fmt.Println(
 
"Devices addresses: ", device.Description)

                for _, address := range device.Addresses {
                        fmt.Println("- IP address: ", address.IP)
                        fmt.Println("- Subnet mask: ", address.Netmask)
                }
        }
}

執行結果：

Name:  ens33
Description:  
Devices addresses:  
 
- IP address:  192.168.1.100
- Subnet mask:  ffffff00

demo2：開啟裝置實時捕捉

package main

import (
        "fmt"
        "github.com/google/gopacket"
        "github.com/google/gopacket/pcap"
        "log"
        "time"
)

var (
        device       string = "ens33"
        snapshot_len int32  = 1024
        promiscuous  bool   = false
        err          error
        timeout      time.Duration = 30 * time.Second
        handle       *pcap.Handle
)

func main() {
        // Open device
        handle, err = pcap.OpenLive(device, snapshot_len, promiscuous, timeout)
        if err != nil {
                log.Fatal(err)
        }
        defer handle.Close()

        // Use the handle as a packet source to process all packets
        packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
        for packet := range packetSource.Packets() {
                // Process packet here
                fmt.Println(packet)
        }
}

執行結果：

PACKET: 1024 bytes, truncated, wire length 1750 cap length 1024 @ 2020-10-29 14:58:06.569083 +0800 CST
- Layer 1 (14 bytes) = Ethernet {Contents=[..14..] Payload=[..1010..] SrcMAC=00:0c:29:10:dc:10 DstMAC=00:50:56:c0:00:08 EthernetType=IPv4 Length=0}
- Layer 2 (20 bytes) = IPv4     {Contents=[..20..] Payload=[..990..] Version=4 IHL=5 TOS=16 Length=1736 Id=3808 Flags=DF FragOffset=0 TTL=64 Protocol=TCP Checksum=41354 SrcIP=192.168.1.100 DstIP=192.168.1.1 Options=[] Padding=[]}
- Layer 3 (20 bytes) = TCP      {Contents=[..20..] Payload=[..970..] SrcPort=22(ssh) DstPort=59004 Seq=3324909626 Ack=463955946 DataOffset=5 FIN=false SYN=false RST=false PSH=true ACK=true URG=false ECE=false CWR=false NS=false Window=988 Checksum=35440 Urgent=0 Options=[] Padding=[]}
- Layer 4 (970 bytes) = Payload 970 byte(s)

demo3：