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/*
* Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
* Copyright (C) 2017-2018 Pacien TRAN-GIRARD
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package org.pacien.tincapp.extensions
import android.net.VpnService
import org.pacien.tincapp.data.CidrAddress
import org.pacien.tincapp.data.VpnInterfaceConfiguration
import org.pacien.tincapp.extensions.Java.applyIgnoringException
/**
* @author pacien
*/
object VpnServiceBuilder {
private fun <T> exceptWithCidr(cidr: CidrAddress, func: () -> T) = try {
func()
} catch (e: IllegalArgumentException) {
throw IllegalArgumentException("${e.message}: $cidr")
}
private fun VpnService.Builder.addAddress(cidr: CidrAddress): VpnService.Builder =
exceptWithCidr(cidr) { addAddress(cidr.address, cidr.prefix) }
private fun VpnService.Builder.addRoute(cidr: CidrAddress): VpnService.Builder =
exceptWithCidr(cidr) { addRoute(cidr.address, cidr.prefix) }
private fun VpnService.Builder.allowBypass(allow: Boolean): VpnService.Builder =
if (allow) allowBypass() else this
private fun VpnService.Builder.overrideMtu(mtu: Int?): VpnService.Builder =
if (mtu != null) setMtu(mtu) else this
private fun VpnService.Builder.addAddresses(cidrList: List<CidrAddress>): VpnService.Builder =
cidrList.fold(this) { net, cidr -> net.addAddress(cidr) }
private fun VpnService.Builder.addRoutes(cidrList: List<CidrAddress>): VpnService.Builder =
cidrList.fold(this) { net, cidr -> net.addRoute(cidr) }
private fun VpnService.Builder.addDnsServers(dnsList: List<String>): VpnService.Builder =
dnsList.fold(this) { net, dns -> net.addDnsServer(dns) }
private fun VpnService.Builder.addSearchDomains(domainList: List<String>): VpnService.Builder =
domainList.fold(this) { net, domain -> net.addSearchDomain(domain) }
private fun VpnService.Builder.allowFamilies(familyList: List<Int>): VpnService.Builder =
familyList.fold(this) { net, family -> net.allowFamily(family) }
private fun VpnService.Builder.addAllowedApplications(apps: List<String>): VpnService.Builder =
apps.fold(this) { net, app -> applyIgnoringException(net::addAllowedApplication, app, net)!! }
private fun VpnService.Builder.addDisallowedApplications(apps: List<String>): VpnService.Builder =
apps.fold(this) { net, app -> applyIgnoringException(net::addDisallowedApplication, app, net)!! }
fun VpnService.Builder.applyCfg(cfg: VpnInterfaceConfiguration): VpnService.Builder = this
.addAddresses(cfg.addresses)
.addRoutes(cfg.routes)
.addDnsServers(cfg.dnsServers)
.addSearchDomains(cfg.searchDomains)
.addAllowedApplications(cfg.allowedApplications)
.addDisallowedApplications(cfg.disallowedApplications)
.allowFamilies(cfg.allowedFamilies)
.allowBypass(cfg.allowBypass)
.setBlocking(cfg.blocking)
.overrideMtu(cfg.mtu)
}
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