From f7b85638f1f1237f86704bfca7c0709103b6af41 Mon Sep 17 00:00:00 2001
From: M66B <marcel@faircode.eu>
Date: Sun, 24 Jan 2016 14:18:31 +0100
Subject: [PATCH] Fixed crash when enabling tethering

---
 app/src/main/java/eu/faircode/netguard/SinkholeService.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/faircode/netguard/SinkholeService.java b/app/src/main/java/eu/faircode/netguard/SinkholeService.java
index b873c38f..465f3e32 100644
--- a/app/src/main/java/eu/faircode/netguard/SinkholeService.java
+++ b/app/src/main/java/eu/faircode/netguard/SinkholeService.java
@@ -682,8 +682,10 @@ public class SinkholeService extends VpnService implements SharedPreferences.OnS
                                     builder.addRoute(String.format("%d.%d.%d.0", r, s, t), 24);
                         } else
                             builder.addRoute(String.format("%d.%d.0.0", r, s), 16);
-                } else if (r != 127)
+                } else if (r != 127 && r != 224 && r != 255) {
+                    // https://en.wikipedia.org/wiki/IPv4#Special-use_addresses
                     builder.addRoute(String.format("%d.0.0.0", r), 8);
+                }
         } else
             builder.addRoute("0.0.0.0", 0);