68 lines
1.0 KiB
Go
68 lines
1.0 KiB
Go
//go:build openbsd
|
|
// +build openbsd
|
|
|
|
package aghnet
|
|
|
|
import (
|
|
"bufio"
|
|
"net"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/AdguardTeam/golibs/log"
|
|
)
|
|
|
|
func newARPDB() *cmdARPDB {
|
|
return &cmdARPDB{
|
|
runcmd: rcArpA,
|
|
parse: parseArpA,
|
|
ns: &neighs{
|
|
mu: &sync.RWMutex{},
|
|
ns: make([]Neighbor, 0),
|
|
},
|
|
}
|
|
}
|
|
|
|
// parseArpA parses the output of the "arp -a" command on OpenBSD. The expected
|
|
// input format:
|
|
//
|
|
// Host Ethernet Address Netif Expire Flags
|
|
// 192.168.1.1 ab:cd:ef:ab:cd:ef em0 19m59s
|
|
//
|
|
func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
|
|
// Skip the header.
|
|
if !sc.Scan() {
|
|
return nil
|
|
}
|
|
|
|
ns = make([]Neighbor, 0, lenHint)
|
|
for sc.Scan() {
|
|
ln := sc.Text()
|
|
|
|
fields := strings.Fields(ln)
|
|
if len(fields) < 2 {
|
|
continue
|
|
}
|
|
|
|
n := Neighbor{}
|
|
|
|
if ip := net.ParseIP(fields[0]); ip == nil {
|
|
continue
|
|
} else {
|
|
n.IP = ip
|
|
}
|
|
|
|
if mac, err := net.ParseMAC(fields[1]); err != nil {
|
|
log.Debug("parsing arp output: %s", err)
|
|
|
|
continue
|
|
} else {
|
|
n.MAC = mac
|
|
}
|
|
|
|
ns = append(ns, n)
|
|
}
|
|
|
|
return ns
|
|
}
|