在Go语言中，你可以使用github.com/mdlayher/arp这个库来监听ARP报文。以下是一个简单的示例代码：
package main
import (
"fmt"
"log"
"net"
"github.com/mdlayher/arp"
)
func main() {
iface, err := net.InterfaceByName("eth0") // 替换为你的网络接口名
if err != nil {
log.Fatal(err)
}
conn, err := arp.NewPacketConn(iface)
if err != nil {
log.Fatal(err)
}
defer conn.Close()
packets := make(chan *arp.Packet)
go func() {
for packet := range packets {
ip := packet.SenderIP.String()
mac := packet.SenderHardwareAddr.String()
fmt.Printf("Received ARP packet from IP: %s, MAC: %s\n", ip, mac)
localIPs, err := getLocalIPs()
if err != nil {
log.Println("Failed to get local IP addresses:", err)
continue
}
for _, localIP := range localIPs {
if ip == localIP.String() {
fmt.Printf("[ALERT] Conflict detected! Local IP address %s is conflicting with sender's IP: %s\n", localIP.String(), ip)
break
}
}
}
}()
err = conn.SetARPFilter(&arp.OperationFilter{
WantOperation: arp.OperationRequest,
})
if err != nil {
log.Fatal(err)
}
buf := make([]byte, 65536)
for {
n, _, err := conn.ReadFrom(buf)
if err != nil {
log.Fatal(err)
break
}
packet, err := arp.ParsePacket(buf[:n])
if err != nil {
log.Println("Failed to parse ARP packet:", err)
continue
}
packets <- packet
}
}
func getLocalIPs() ([]net.IP, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return nil, err
}
var ips []net.IP
for _, addr := range addrs {
ipNet, ok := addr.(*net.IPNet)
if ok && !ipNet.IP.IsLoopback() && ipNet.IP.To4() != nil {
ips = append(ips, ipNet.IP)
}
}
return ips, nil
}
这段代码会监听指定网络接口上的ARP报文，如果收到的报文中的发送者IP地址与本机IP地址冲突，则会输出警告信息。
请注意替换代码中的网络接口名eth0为你实际使用的网络接口名。同时，还需导入相应的库：
go get -u github.com/mdlayher/arp
希望对你有所帮助！
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