From d1466ba4b20d75405de83ddb42be6cbdded111d7 Mon Sep 17 00:00:00 2001
From: yuhan6665 <1588741+yuhan6665@users.noreply.github.com>
Date: Fri, 24 Jul 2020 18:12:20 -0400
Subject: [PATCH] Bypass private IP at VPN service

---
 .../com/v2ray/ang/service/V2RayVpnService.kt  | 16 ++++++++-
 V2rayNG/app/src/main/res/values/arrays.xml    | 35 +++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayVpnService.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayVpnService.kt
index 7c614210..67c4b02e 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayVpnService.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayVpnService.kt
@@ -131,6 +131,7 @@ class V2RayVpnService : VpnService() {
         // Configure a builder while parsing the parameters.
         val builder = Builder()
         val enableLocalDns = defaultDPreference.getPrefBoolean(SettingsActivity.PREF_LOCAL_DNS_ENABLED, false)
+        val routingMode = defaultDPreference.getPrefString(SettingsActivity.PREF_ROUTING_MODE, "0")
 
         parameters.split(" ")
                 .map { it.split(",") }
@@ -139,7 +140,20 @@ class V2RayVpnService : VpnService() {
                         'm' -> builder.setMtu(java.lang.Short.parseShort(it[1]).toInt())
                         's' -> builder.addSearchDomain(it[1])
                         'a' -> builder.addAddress(it[1], Integer.parseInt(it[2]))
-                        'r' -> builder.addRoute(it[1], Integer.parseInt(it[2]))
+                        'r' -> {
+                            if (routingMode == "1" || routingMode == "3") {
+                                if (it[1] == "::") { //not very elegant, should move Vpn setting in Kotlin, simplify go code
+                                    builder.addRoute("2000::", 3)
+                                } else {
+                                    resources.getStringArray(R.array.bypass_private_ip_address).forEach {
+                                        val addr = it.split('/')
+                                        builder.addRoute(addr[0], addr[1].toInt())
+                                    }
+                                }
+                            } else {
+                                builder.addRoute(it[1], Integer.parseInt(it[2]))
+                            }
+                        }
                         'd' -> builder.addDnsServer(it[1])
                     }
                 }
diff --git a/V2rayNG/app/src/main/res/values/arrays.xml b/V2rayNG/app/src/main/res/values/arrays.xml
index 03e5d437..11dfa77b 100644
--- a/V2rayNG/app/src/main/res/values/arrays.xml
+++ b/V2rayNG/app/src/main/res/values/arrays.xml
@@ -66,4 +66,39 @@
         <item>IPIfNonMatch</item>
         <item>IPOnDemand</item>
     </string-array>
+
+    <!-- minimum list https://serverfault.com/a/304791 -->
+    <string-array name="bypass_private_ip_address" translatable="false">
+        <item>0.0.0.0/5</item>
+        <item>8.0.0.0/7</item>
+        <item>11.0.0.0/8</item>
+        <item>12.0.0.0/6</item>
+        <item>16.0.0.0/4</item>
+        <item>32.0.0.0/3</item>
+        <item>64.0.0.0/2</item>
+        <item>128.0.0.0/3</item>
+        <item>160.0.0.0/5</item>
+        <item>168.0.0.0/6</item>
+        <item>172.0.0.0/12</item>
+        <item>172.32.0.0/11</item>
+        <item>172.64.0.0/10</item>
+        <item>172.128.0.0/9</item>
+        <item>173.0.0.0/8</item>
+        <item>174.0.0.0/7</item>
+        <item>176.0.0.0/4</item>
+        <item>192.0.0.0/9</item>
+        <item>192.128.0.0/11</item>
+        <item>192.160.0.0/13</item>
+        <item>192.169.0.0/16</item>
+        <item>192.170.0.0/15</item>
+        <item>192.172.0.0/14</item>
+        <item>192.176.0.0/12</item>
+        <item>192.192.0.0/10</item>
+        <item>193.0.0.0/8</item>
+        <item>194.0.0.0/7</item>
+        <item>196.0.0.0/6</item>
+        <item>200.0.0.0/5</item>
+        <item>208.0.0.0/4</item>
+        <item>224.0.0.0/3</item>
+    </string-array>
 </resources>