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Filter out zero addresses in arp

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This commit is contained in:
Mygod
2020-12-11 10:16:15 -05:00
committed by GitHub
parent df6676950d
commit 825c7373a7
1 changed files with 3 additions and 2 deletions
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5
mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
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@@ -79,11 +79,12 @@ data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: MacAddr
val list = arp()
.asSequence()
.filter { parseNumericAddress(it[ARP_IP_ADDRESS]) == ip && it[ARP_DEVICE] in devs }
.map { it[ARP_HW_ADDRESS] }
.map { MacAddressCompat.fromString(it[ARP_HW_ADDRESS]) }
.filter { it != MacAddressCompat.ALL_ZEROS_ADDRESS }
.distinct()
.toList()
when (list.size) {
1 -> lladdr = MacAddressCompat.fromString(list.single())
1 -> lladdr = list.single()
0 -> { }
else -> throw IllegalArgumentException("Unexpected output in arp: ${list.joinToString()}")
}