brianhansonxyz/vpnhotspotmod
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Split NetUtils (terrible name)

Browse Source
This commit is contained in:
Mygod
2018-01-21 12:50:21 -08:00
parent d131c90d27
commit 5ad840fe43
6 changed files with 68 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
View File

@@ -1,6 +1,8 @@
package be.mygod.vpnhotspot.net
import android.util.Log
import java.io.File
import java.io.IOException
data class IpNeighbour(val ip: String, val dev: String, val lladdr: String, val state: State) {
enum class State {
@@ -18,6 +20,8 @@ data class IpNeighbour(val ip: String, val dev: String, val lladdr: String, val
*/
private val parser =
"^(Deleted )?(.+?) (dev (.+?) )?(lladdr (.+?))?( proxy)?( ([INCOMPLET,RAHBSDYF]+))?\$".toRegex()
private fun checkLladdrNotLoopback(lladdr: String) = if (lladdr == "00:00:00:00:00:00") "" else lladdr
fun parse(line: String): IpNeighbour? {
val match = parser.matchEntire(line)
if (match == null) {
@@ -26,11 +30,11 @@ data class IpNeighbour(val ip: String, val dev: String, val lladdr: String, val
}
val ip = match.groupValues[2]
val dev = match.groupValues[4]
var lladdr = match.groupValues[6]
var lladdr = checkLladdrNotLoopback(match.groupValues[6])
// use ARP as fallback
if (dev.isNotBlank() && lladdr.isBlank()) lladdr = (NetUtils.arp()
.filter { it[NetUtils.ARP_IP_ADDRESS] == ip && it[NetUtils.ARP_DEVICE] == dev }
.map { it[NetUtils.ARP_HW_ADDRESS] }
if (dev.isNotBlank() && lladdr.isBlank()) lladdr = checkLladdrNotLoopback(arp()
.filter { it[ARP_IP_ADDRESS] == ip && it[ARP_DEVICE] == dev }
.map { it[ARP_HW_ADDRESS] }
.singleOrNull() ?: "")
val state = if (match.groupValues[1].isNotEmpty()) State.DELETING else when (match.groupValues[9]) {
"", "INCOMPLETE" -> State.INCOMPLETE
@@ -45,5 +49,29 @@ data class IpNeighbour(val ip: String, val dev: String, val lladdr: String, val
}
return IpNeighbour(ip, dev, lladdr, state)
}
private val spaces = " +".toPattern()
private val mac = "^([0-9a-f]{2}:){5}[0-9a-f]{2}$".toPattern()
// IP address HW type Flags HW address Mask Device
private const val ARP_IP_ADDRESS = 0
private const val ARP_HW_ADDRESS = 3
private const val ARP_DEVICE = 5
private const val ARP_CACHE_EXPIRE = 1L * 1000 * 1000 * 1000
private var arpCache = emptyList<List<String>>()
private var arpCacheTime = -ARP_CACHE_EXPIRE
fun arp(): List<List<String>> {
if (System.nanoTime() - arpCacheTime >= ARP_CACHE_EXPIRE) try {
arpCache = File("/proc/net/arp").bufferedReader().useLines {
it.map { it.split(spaces) }
.drop(1)
.filter { it.size >= 6 && mac.matcher(it[ARP_HW_ADDRESS]).matches() }
.toList()
}
} catch (e: IOException) {
e.printStackTrace()
}
return arpCache
}
}
}