Fix for the invalid Global Proxy Setting

Adding validation for Global Proxy setting before it is
being set.

Proxy is validated at the boot time also to make sure
the value set is valid.

Signed-off-by: Raj Mamadgi <rmamadgi@sta.samsung.com>
bug:11598568

Change-Id: Idff5ae81119d8143da096b5291ecbfbc5875cbd4
diff --git a/core/java/android/net/ProxyProperties.java b/core/java/android/net/ProxyProperties.java
index 78ac75f..010e527 100644
--- a/core/java/android/net/ProxyProperties.java
+++ b/core/java/android/net/ProxyProperties.java
@@ -139,6 +139,17 @@
         return false;
     }
 
+    public boolean isValid() {
+        if (!TextUtils.isEmpty(mPacFileUrl)) return true;
+        try {
+            Proxy.validate(mHost == null ? "" : mHost, mPort == 0 ? "" : Integer.toString(mPort),
+                    mExclusionList == null ? "" : mExclusionList);
+        } catch (IllegalArgumentException e) {
+            return false;
+        }
+        return true;
+    }
+
     public java.net.Proxy makeProxy() {
         java.net.Proxy proxy = java.net.Proxy.NO_PROXY;
         if (mHost != null) {
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 594f683..478f8c7 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -3380,6 +3380,11 @@
             String pacFileUrl = "";
             if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) ||
                     !TextUtils.isEmpty(proxyProperties.getPacFileUrl()))) {
+                if (!proxyProperties.isValid()) {
+                    if (DBG)
+                        log("Invalid proxy properties, ignoring: " + proxyProperties.toString());
+                    return;
+                }
                 mGlobalProxy = new ProxyProperties(proxyProperties);
                 host = mGlobalProxy.getHost();
                 port = mGlobalProxy.getPort();
@@ -3423,6 +3428,11 @@
             } else {
                 proxyProperties = new ProxyProperties(host, port, exclList);
             }
+            if (!proxyProperties.isValid()) {
+                if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString());
+                return;
+            }
+
             synchronized (mProxyLock) {
                 mGlobalProxy = proxyProperties;
             }
@@ -3447,6 +3457,10 @@
         synchronized (mProxyLock) {
             if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return;
             if (mDefaultProxy == proxy) return; // catches repeated nulls
+            if (!proxy.isValid()) {
+                if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString());
+                return;
+            }
             mDefaultProxy = proxy;
 
             if (mGlobalProxy != null) return;
diff --git a/services/java/com/android/server/DevicePolicyManagerService.java b/services/java/com/android/server/DevicePolicyManagerService.java
index 1c3b9bb..2bb99d6 100644
--- a/services/java/com/android/server/DevicePolicyManagerService.java
+++ b/services/java/com/android/server/DevicePolicyManagerService.java
@@ -56,6 +56,7 @@
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ResolveInfo;
 import android.content.pm.UserInfo;
+import android.net.ProxyProperties;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Binder;
@@ -2464,6 +2465,12 @@
         }
         exclusionList = exclusionList.trim();
         ContentResolver res = mContext.getContentResolver();
+
+        ProxyProperties proxyProperties = new ProxyProperties(data[0], proxyPort, exclusionList);
+        if (!proxyProperties.isValid()) {
+            Slog.e(TAG, "Invalid proxy properties, ignoring: " + proxyProperties.toString());
+            return;
+        }
         Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, data[0]);
         Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, proxyPort);
         Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST,