mirror of https://github.com/bjdgyc/anylink.git
62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
// Currently only Darwin and Linux support this.
|
|
|
|
package arpdis
|
|
|
|
import (
|
|
"log"
|
|
"net"
|
|
"os/exec"
|
|
"strings"
|
|
)
|
|
|
|
func doLookup(ip net.IP) *Addr {
|
|
// ping := exec.Command("ping", "-c1", "-t1", ip.String())
|
|
// if err := ping.Run(); err != nil {
|
|
// addr := &Addr{IP: ip, Type: TypeUnreachable}
|
|
// return addr
|
|
// }
|
|
|
|
err := doPing(ip.String())
|
|
if err != nil {
|
|
// log.Println(err)
|
|
addr := &Addr{IP: ip, Type: TypeUnreachable}
|
|
return addr
|
|
}
|
|
|
|
return doArpShow(ip)
|
|
}
|
|
|
|
func doArpShow(ip net.IP) *Addr {
|
|
cmd := exec.Command("ip", "n", "show", ip.String())
|
|
out, err := cmd.Output()
|
|
if err != nil {
|
|
log.Println("lookup show", err)
|
|
return nil
|
|
}
|
|
|
|
// os.Open("/proc/net/arp")
|
|
// 192.168.1.2 0x1 0x2 e0:94:67:e2:42:5d * eth0
|
|
// 192.168.1.2 dev eth0 lladdr 08:00:27:94:a5:a4 STALE
|
|
outS := strings.ReplaceAll(string(out), " ", " ")
|
|
outS = strings.TrimSpace(outS)
|
|
arpArr := strings.Split(outS, " ")
|
|
if len(arpArr) != 6 {
|
|
log.Println("lookup arpArr", outS, ip)
|
|
return nil
|
|
}
|
|
mac, err := net.ParseMAC(arpArr[4])
|
|
if err != nil {
|
|
log.Println("lookup mac", outS, err)
|
|
return nil
|
|
}
|
|
|
|
return &Addr{IP: ip, HardwareAddr: mac}
|
|
}
|
|
|
|
// IP address HW type Flags HW address Mask Device
|
|
// 172.23.24.12 0x1 0x2 00:e0:4c:73:5c:48 * anylink0
|
|
// 172.23.24.1 0x1 0x2 3c:8c:40:a0:7a:2d * anylink0
|
|
// 172.23.24.13 0x1 0x2 00:1c:42:4d:33:46 * anylink0
|
|
// 172.23.24.2 0x1 0x0 00:00:00:00:00:00 * anylink0
|
|
// 172.23.24.14 0x1 0x0 00:00:00:00:00:00 * anylink0
|