AdGuardHome/internal/aghnet/arpdb_windows.go

66 lines
1.1 KiB
Go

//go:build windows
package aghnet
import (
"bufio"
"net"
"net/netip"
"strings"
"sync"
)
func newARPDB() (arp *cmdARPDB) {
return &cmdARPDB{
parse: parseArpA,
ns: &neighs{
mu: &sync.RWMutex{},
ns: make([]Neighbor, 0),
},
cmd: "arp",
args: []string{"/a"},
}
}
// parseArpA parses the output of the "arp /a" command on Windows. The expected
// input format (the first line is empty):
//
// Interface: 192.168.56.16 --- 0x7
// Internet Address Physical Address Type
// 192.168.56.1 0a-00-27-00-00-00 dynamic
// 192.168.56.255 ff-ff-ff-ff-ff-ff static
func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
ns = make([]Neighbor, 0, lenHint)
for sc.Scan() {
ln := sc.Text()
if ln == "" {
continue
}
fields := strings.Fields(ln)
if len(fields) != 3 {
continue
}
n := Neighbor{}
ip, err := netip.ParseAddr(fields[0])
if err != nil {
continue
} else {
n.IP = ip
}
mac, err := net.ParseMAC(fields[1])
if err != nil {
continue
} else {
n.MAC = mac
}
ns = append(ns, n)
}
return ns
}