From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tad <tad@spotco.us>
Date: Mon, 24 Jun 2019 21:27:35 +0530
Subject: [PATCH] Add more 'Private DNS' options

This adds thirteen DNS providers as available presets.

Credit: CalyxOS
- Chirayu Desai <chirayudesai1@gmail.com>
  https://review.calyxos.org/c/CalyxOS/platform_packages_modules_Connectivity/+/9588

Change-Id: I4e51da9d8fe08d1c4a287808f4464c0338b40334
---
 .../net/ConnectivitySettingsManager.java      | 170 ++++++++++++++++++
 .../server/connectivity/DnsManager.java       |  78 ++++++++
 2 files changed, 248 insertions(+)

diff --git a/framework/src/android/net/ConnectivitySettingsManager.java b/framework/src/android/net/ConnectivitySettingsManager.java
index 32f831979..021937cce 100644
--- a/framework/src/android/net/ConnectivitySettingsManager.java
+++ b/framework/src/android/net/ConnectivitySettingsManager.java
@@ -351,6 +351,84 @@ public class ConnectivitySettingsManager {
      */
     public static final int PRIVATE_DNS_MODE_OFF = ConnectivitySettingsUtils.PRIVATE_DNS_MODE_OFF;
 
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_ADGUARD =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_ADGUARD;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_APPLIEDPRIVACY =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_APPLIEDPRIVACY;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_CLEANBROWSING =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_CLEANBROWSING;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_CIRA =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_CIRA;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_CZNIC =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_CZNIC;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_CLOUDFLARE =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_CLOUDFLARE;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_GOOGLE =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_GOOGLE;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_MULLVAD =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_MULLVAD;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_QUADNINE =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_QUADNINE;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_RESTENA =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_RESTENA;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_SWITCH =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_SWITCH;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_TWNIC =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_TWNIC;
+
+    /**
+     * @hide
+     */
+    public static final int PRIVATE_DNS_MODE_UNCENSOREDDNS =
+            ConnectivitySettingsUtils.PRIVATE_DNS_MODE_UNCENSOREDDNS;
+
     /**
      * One of the private DNS modes that indicates the private DNS mode is automatic, which
      * will try to use the current DNS as private DNS.
@@ -366,10 +444,89 @@ public class ConnectivitySettingsManager {
     public static final int PRIVATE_DNS_MODE_PROVIDER_HOSTNAME =
             ConnectivitySettingsUtils.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME;
 
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_ADGUARD = "dns.adguard.com";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_APPLIEDPRIVACY = "dot1.applied-privacy.net";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_CIRA = "protected.canadianshield.cira.ca";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_CZNIC = "odvr.nic.cz";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_CLEANBROWSING = "security-filter-dns.cleanbrowsing.org";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_CLOUDFLARE = "security.cloudflare-dns.com";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_GOOGLE = "dns.google";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_MULLVAD = "adblock.doh.mullvad.net";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_QUADNINE = "dns.quad9.net";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_RESTENA = "kaitain.restena.lu";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_SWITCH = "dns.switch.ch";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_TWNIC = "101.101.101.101";
+
+    /**
+     * @hide
+     */
+    public static final String PRIVATE_DNS_SPECIFIER_UNCENSOREDDNS = "unicast.censurfridns.dk";
+
+
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(value = {
             PRIVATE_DNS_MODE_OFF,
+            PRIVATE_DNS_MODE_ADGUARD,
+            PRIVATE_DNS_MODE_APPLIEDPRIVACY,
+            PRIVATE_DNS_MODE_CLEANBROWSING,
+            PRIVATE_DNS_MODE_CIRA,
+            PRIVATE_DNS_MODE_CZNIC,
+            PRIVATE_DNS_MODE_CLOUDFLARE,
+            PRIVATE_DNS_MODE_GOOGLE,
+            PRIVATE_DNS_MODE_MULLVAD,
+            PRIVATE_DNS_MODE_QUADNINE,
+            PRIVATE_DNS_MODE_RESTENA,
+            PRIVATE_DNS_MODE_SWITCH,
+            PRIVATE_DNS_MODE_TWNIC,
+            PRIVATE_DNS_MODE_UNCENSOREDDNS,
             PRIVATE_DNS_MODE_OPPORTUNISTIC,
             PRIVATE_DNS_MODE_PROVIDER_HOSTNAME,
     })
@@ -806,6 +963,19 @@ public class ConnectivitySettingsManager {
     public static void setPrivateDnsDefaultMode(@NonNull Context context,
             @NonNull @PrivateDnsMode int mode) {
         if (!(mode == PRIVATE_DNS_MODE_OFF
+                || mode == PRIVATE_DNS_MODE_ADGUARD
+                || mode == PRIVATE_DNS_MODE_APPLIEDPRIVACY
+                || mode == PRIVATE_DNS_MODE_CLEANBROWSING
+                || mode == PRIVATE_DNS_MODE_CIRA
+                || mode == PRIVATE_DNS_MODE_CZNIC
+                || mode == PRIVATE_DNS_MODE_CLOUDFLARE
+                || mode == PRIVATE_DNS_MODE_GOOGLE
+                || mode == PRIVATE_DNS_MODE_MULLVAD
+                || mode == PRIVATE_DNS_MODE_QUADNINE
+                || mode == PRIVATE_DNS_MODE_RESTENA
+                || mode == PRIVATE_DNS_MODE_SWITCH
+                || mode == PRIVATE_DNS_MODE_TWNIC
+                || mode == PRIVATE_DNS_MODE_UNCENSOREDDNS
                 || mode == PRIVATE_DNS_MODE_OPPORTUNISTIC
                 || mode == PRIVATE_DNS_MODE_PROVIDER_HOSTNAME)) {
             throw new IllegalArgumentException("Invalid private dns mode");
diff --git a/service/src/com/android/server/connectivity/DnsManager.java b/service/src/com/android/server/connectivity/DnsManager.java
index 1493cae79..2a5058c3c 100644
--- a/service/src/com/android/server/connectivity/DnsManager.java
+++ b/service/src/com/android/server/connectivity/DnsManager.java
@@ -23,8 +23,34 @@ import static android.net.ConnectivitySettingsManager.DNS_RESOLVER_SUCCESS_THRES
 import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_DEFAULT_MODE;
 import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE;
 import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_OFF;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_ADGUARD;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_APPLIEDPRIVACY;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_CLEANBROWSING;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_CIRA;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_CZNIC;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_CLOUDFLARE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_GOOGLE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_MULLVAD;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_QUADNINE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_RESTENA;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_SWITCH;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_TWNIC;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_UNCENSOREDDNS;
 import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME;
 import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_ADGUARD;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_APPLIEDPRIVACY;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_CLEANBROWSING;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_CIRA;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_CZNIC;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_CLOUDFLARE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_GOOGLE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_MULLVAD;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_QUADNINE;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_RESTENA;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_SWITCH;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_TWNIC;
+import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_SPECIFIER_UNCENSOREDDNS;
 import static android.net.resolv.aidl.IDnsResolverUnsolicitedEventListener.VALIDATION_RESULT_FAILURE;
 import static android.net.resolv.aidl.IDnsResolverUnsolicitedEventListener.VALIDATION_RESULT_SUCCESS;
 
@@ -141,6 +167,58 @@ public class DnsManager {
             return new PrivateDnsConfig(specifier, null);
         }
 
+        if (PRIVATE_DNS_MODE_ADGUARD == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_ADGUARD, null);
+        }
+
+        if (PRIVATE_DNS_MODE_APPLIEDPRIVACY == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_APPLIEDPRIVACY, null);
+        }
+
+        if (PRIVATE_DNS_MODE_CLEANBROWSING == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_CLEANBROWSING, null);
+        }
+
+        if (PRIVATE_DNS_MODE_CIRA == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_CIRA, null);
+        }
+
+        if (PRIVATE_DNS_MODE_CZNIC == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_CZNIC, null);
+        }
+
+        if (PRIVATE_DNS_MODE_CLOUDFLARE == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_CLOUDFLARE, null);
+        }
+
+        if (PRIVATE_DNS_MODE_GOOGLE == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_GOOGLE, null);
+        }
+
+        if (PRIVATE_DNS_MODE_MULLVAD == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_MULLVAD, null);
+        }
+
+        if (PRIVATE_DNS_MODE_QUADNINE == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_QUADNINE, null);
+        }
+
+        if (PRIVATE_DNS_MODE_RESTENA == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_RESTENA, null);
+        }
+
+        if (PRIVATE_DNS_MODE_SWITCH == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_SWITCH, null);
+        }
+
+        if (PRIVATE_DNS_MODE_TWNIC == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_TWNIC, null);
+        }
+
+        if (PRIVATE_DNS_MODE_UNCENSOREDDNS == mode) {
+            return new PrivateDnsConfig(PRIVATE_DNS_SPECIFIER_UNCENSOREDDNS, null);
+        }
+
         return new PrivateDnsConfig(useTls);
     }
 
