1 files changed, 45 insertions, 0 deletions

diff --git a/app/src/main/java/org/pacien/tincapp/service/VpnServiceBuilderExtensions.kt b/app/src/main/java/org/pacien/tincapp/service/VpnServiceBuilderExtensions.kt
new file mode 100644
index 0000000..d94d64d
--- /dev/null
+++ b/app/src/main/java/org/pacien/tincapp/service/VpnServiceBuilderExtensions.kt
@@ -0,0 +1,45 @@
+package org.pacien.tincapp.service
+
+import android.net.VpnService
+
+/**
+ * @author pacien
+ */
+
+data class CidrAddress(val address: String, val prefix: Int) {
+    constructor(slashSeparated: String) :
+            this(slashSeparated.substringBefore("/"), Integer.parseInt(slashSeparated.substringAfter("/")))
+}
+
+
+fun <A, R> applyIgnoringException(f: (A) -> R, x: A, alt: R? = null) = try {
+    f(x)
+} catch (_: Exception) {
+    alt
+}
+
+fun VpnService.Builder.addAddress(cidr: CidrAddress) = addAddress(cidr.address, cidr.prefix)
+fun VpnService.Builder.addRoute(cidr: CidrAddress) = addRoute(cidr.address, cidr.prefix)
+fun VpnService.Builder.allowBypass(allow: Boolean) = if (allow) allowBypass() else this
+fun VpnService.Builder.overrideMtu(mtu: Int?) = if (mtu != null) setMtu(mtu) else this
+
+fun VpnService.Builder.addAddresses(cidrList: List<CidrAddress>) =
+        cidrList.fold(this, { net, cidr -> net.addAddress(cidr) })
+
+fun VpnService.Builder.addRoutes(cidrList: List<CidrAddress>) =
+        cidrList.fold(this, { net, cidr -> net.addRoute(cidr) })
+
+fun VpnService.Builder.addDnsServers(dnsList: List<String>) =
+        dnsList.fold(this, { net, dns -> net.addDnsServer(dns) })
+
+fun VpnService.Builder.addSearchDomains(domainList: List<String>) =
+        domainList.fold(this, { net, domain -> net.addSearchDomain(domain) })
+
+fun VpnService.Builder.allowFamilies(familyList: List<Int>) =
+        familyList.fold(this, { net, family -> net.allowFamily(family) })
+
+fun VpnService.Builder.addAllowedApplications(apps: List<String>) =
+        apps.fold(this, { net, app -> applyIgnoringException(net::addAllowedApplication, app, net)!! })
+
+fun VpnService.Builder.addDisallowedApplications(apps: List<String>) =
+        apps.fold(this, { net, app -> applyIgnoringException(net::addDisallowedApplication, app, net)!! })