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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.printservice.recommendation.plugin.hp;
     18 
     19 import android.net.nsd.NsdServiceInfo;
     20 import android.text.TextUtils;
     21 
     22 import java.nio.charset.StandardCharsets;
     23 import java.util.Locale;
     24 import java.util.Map;
     25 
     26 public class MDnsUtils {
     27     public static final String ATTRIBUTE__TY = "ty";
     28     public static final String ATTRIBUTE__PRODUCT = "product";
     29     public static final String ATTRIBUTE__USB_MFG = "usb_MFG";
     30     public static final String ATTRIBUTE__MFG = "mfg";
     31 
     32     public static String getString(byte[] value) {
     33         if (value != null) return new String(value,StandardCharsets.UTF_8);
     34         return null;
     35     }
     36 
     37     public static boolean isVendorPrinter(NsdServiceInfo networkDevice, String[] vendorValues) {
     38 
     39         Map<String,byte[]> attributes = networkDevice.getAttributes();
     40         String product = getString(attributes.get(ATTRIBUTE__PRODUCT));
     41         String ty = getString(attributes.get(ATTRIBUTE__TY));
     42         String usbMfg = getString(attributes.get(ATTRIBUTE__USB_MFG));
     43         String mfg = getString(attributes.get(ATTRIBUTE__MFG));
     44         return containsVendor(product, vendorValues) || containsVendor(ty, vendorValues) || containsVendor(usbMfg, vendorValues) || containsVendor(mfg, vendorValues);
     45 
     46     }
     47 
     48     public static String getVendor(NsdServiceInfo networkDevice) {
     49         String vendor;
     50 
     51         Map<String,byte[]> attributes = networkDevice.getAttributes();
     52         vendor = getString(attributes.get(ATTRIBUTE__MFG));
     53         if (!TextUtils.isEmpty(vendor)) return vendor;
     54         vendor = getString(attributes.get(ATTRIBUTE__USB_MFG));
     55         if (!TextUtils.isEmpty(vendor)) return vendor;
     56 
     57         return null;
     58     }
     59 
     60     private static boolean containsVendor(String container, String[] vendorValues) {
     61         if ((container == null) || (vendorValues == null)) return false;
     62         for (String value : vendorValues) {
     63             if (containsString(container, value)
     64                 || containsString(container.toLowerCase(Locale.US), value.toLowerCase(Locale.US))
     65                 || containsString(container.toUpperCase(Locale.US), value.toUpperCase(Locale.US)))
     66                 return true;
     67         }
     68         return false;
     69     }
     70 
     71     private static boolean containsString(String container, String contained) {
     72         return (container != null) && (contained != null) && (container.equalsIgnoreCase(contained) || container.contains(contained + " "));
     73     }
     74 }
     75