AdGuardHome/internal/arpdb/arpdb_bsd.go

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//go:build darwin || freebsd
package arpdb
import (
"bufio"
"net"
"net/netip"
"strings"
"sync"
"github.com/AdguardTeam/golibs/log"
)
func newARPDB() (arp *cmdARPDB) {
return &cmdARPDB{
Pull request: 2846 cover aghnet vol.3 Merge in DNS/adguard-home from 2846-cover-aghnet-vol.3 to master Updates #2846. Squashed commit of the following: commit cb22987c43c17bbc8d098e65639cc84e2284bc7b Merge: cf995e9d f31ffcc5 Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Wed Mar 30 15:01:10 2022 +0300 Merge branch 'master' into 2846-cover-aghnet-vol.3 commit cf995e9dce635f16e10406a61e2ab12f06407f1f Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Mon Mar 28 18:29:50 2022 +0300 aghnet: imp tests commit bc225fe8800633b29216840bc7d5b82d7c2d2bfb Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Mon Mar 28 18:03:06 2022 +0300 aghnet: imp tests commit a82eb6045495b94a2e81ced9a3ef5bfe65788e56 Merge: f8081249 0d562a7b Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Mon Mar 28 17:39:13 2022 +0300 Merge branch 'master' into 2846-cover-aghnet-vol.3 commit f80812490c49f69655d409c6f015b069affa2f19 Merge: edccaa79 3603b1fc Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Mon Mar 28 17:29:20 2022 +0300 Merge branch 'master' into 2846-cover-aghnet-vol.3 commit edccaa79fca061ffeea1985c293eed123b16a09c Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Mon Mar 28 13:53:40 2022 +0300 aghnet: imp tests commit 7c5028c92f0a6680516bda67c73e794182c9b825 Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Fri Mar 25 18:01:28 2022 +0300 aghnet: imp code & docs commit 7897c6b13e9be340ae8a71947a8a0bab82c682eb Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Fri Mar 25 17:11:46 2022 +0300 aghnet: imp coverage commit 1eef110af3bf721a0275c695bf27c31815abff04 Author: Eugene Burkov <E.Burkov@AdGuard.COM> Date: Wed Mar 23 21:10:29 2022 +0300 all: return byte slice
2022-03-30 13:11:57 +01:00
parse: parseArpA,
ns: &neighs{
mu: &sync.RWMutex{},
ns: make([]Neighbor, 0),
},
cmd: "arp",
// Use -n flag to avoid resolving the hostnames of the neighbors. By
// default ARP attempts to resolve the hostnames via DNS. See man 8
// arp.
//
// See also https://github.com/AdguardTeam/AdGuardHome/issues/3157.
args: []string{"-a", "-n"},
}
}
// parseArpA parses the output of the "arp -a -n" command on macOS and FreeBSD.
// The expected input format:
//
// host.name (192.168.0.1) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]
func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
ns = make([]Neighbor, 0, lenHint)
for sc.Scan() {
ln := sc.Text()
fields := strings.Fields(ln)
if len(fields) < 4 {
continue
}
ipStr := fields[1]
if len(ipStr) < 2 {
continue
}
ip, err := netip.ParseAddr(ipStr[1 : len(ipStr)-1])
if err != nil {
log.Debug("arpdb: parsing arp output: ip: %s", err)
continue
}
hwStr := fields[3]
mac, err := net.ParseMAC(hwStr)
if err != nil {
log.Debug("arpdb: parsing arp output: mac: %s", err)
continue
}
ns = append(ns, Neighbor{
IP: ip,
MAC: mac,
Name: validatedHostname(fields[0]),
})
}
return ns
}