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Commit dd16d44f authored by Chalard Jean's avatar Chalard Jean
Browse files

Cherry-pick the relevant parts of master change 

I566437e4fe10e1346858149120c50b3c20ca073f to avoid a conflict

Test: atest FrameworksNetTests
Change-Id: I7de4f67234bf97d58bddffa22272c7670398f56d
parent 760e80c1

core/java/android/net/NetworkUtils.java

+31 −0
Original line number Diff line number Diff line
@@ -16,10 +16,15 @@ 


package android.net;



import static android.system.OsConstants.AF_INET;

import static android.system.OsConstants.AF_INET6;



import android.annotation.NonNull;

import android.annotation.UnsupportedAppUsage;

import android.net.shared.Inet4AddressUtils;

import android.os.Build;

import android.system.ErrnoException;

import android.system.Os;

import android.util.Log;

import android.util.Pair;
@@ -454,4 +459,30 @@ public class NetworkUtils { 
        }

        return routedIPCount;

    }



    private static final int[] ADDRESS_FAMILIES = new int[] {AF_INET, AF_INET6};



    /**

     * Returns true if the hostname is weakly validated.

     * @param hostname Name of host to validate.

     * @return True if it's a valid-ish hostname.

     *

     * @hide

     */

    public static boolean isWeaklyValidatedHostname(@NonNull String hostname) {

        // TODO(b/34953048): Use a validation method that permits more accurate,

        // but still inexpensive, checking of likely valid DNS hostnames.

        final String weakHostnameRegex = "^[a-zA-Z0-9_.-]+$";

        if (!hostname.matches(weakHostnameRegex)) {

            return false;

        }



        for (int address_family : ADDRESS_FAMILIES) {

            if (Os.inet_pton(address_family, hostname) != null) {

                return false;

            }

        }



        return true;

    }

}