Philip P. Moltmann | 9dcb86a | 2016-03-14 14:31:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * (c) Copyright 2016 Mopria Alliance, Inc. |
| 3 | * (c) Copyright 2016 The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
Philip P. Moltmann | bfaa472 | 2016-05-03 13:35:28 -0700 | [diff] [blame] | 18 | package com.android.printservice.recommendation.plugin.mdnsFilter; |
Philip P. Moltmann | 9dcb86a | 2016-03-14 14:31:12 -0700 | [diff] [blame] | 19 | |
| 20 | import android.annotation.NonNull; |
| 21 | import android.net.nsd.NsdServiceInfo; |
| 22 | |
| 23 | import java.nio.charset.StandardCharsets; |
| 24 | import java.util.Map; |
| 25 | import java.util.Set; |
| 26 | |
| 27 | /** |
| 28 | * Utils for dealing with mDNS attributes |
| 29 | */ |
Philip P. Moltmann | bfaa472 | 2016-05-03 13:35:28 -0700 | [diff] [blame] | 30 | class MDNSUtils { |
Philip P. Moltmann | 9dcb86a | 2016-03-14 14:31:12 -0700 | [diff] [blame] | 31 | public static final String ATTRIBUTE_TY = "ty"; |
| 32 | public static final String ATTRIBUTE_PRODUCT = "product"; |
| 33 | public static final String ATTRIBUTE_USB_MFG = "usb_mfg"; |
| 34 | public static final String ATTRIBUTE_MFG = "mfg"; |
| 35 | |
| 36 | /** |
| 37 | * Check if the service has any of a set of vendor names. |
| 38 | * |
| 39 | * @param serviceInfo The service |
| 40 | * @param vendorNames The vendors |
| 41 | * |
| 42 | * @return true iff the has any of the set of vendor names |
| 43 | */ |
| 44 | public static boolean isVendorPrinter(@NonNull NsdServiceInfo serviceInfo, |
| 45 | @NonNull Set<String> vendorNames) { |
| 46 | for (Map.Entry<String, byte[]> entry : serviceInfo.getAttributes().entrySet()) { |
| 47 | // keys are case insensitive |
| 48 | String key = entry.getKey().toLowerCase(); |
| 49 | |
| 50 | switch (key) { |
| 51 | case ATTRIBUTE_TY: |
| 52 | case ATTRIBUTE_PRODUCT: |
| 53 | case ATTRIBUTE_USB_MFG: |
| 54 | case ATTRIBUTE_MFG: |
| 55 | if (entry.getValue() != null) { |
| 56 | if (containsVendor(new String(entry.getValue(), StandardCharsets.UTF_8), |
| 57 | vendorNames)) { |
| 58 | return true; |
| 59 | } |
| 60 | } |
| 61 | break; |
| 62 | default: |
| 63 | break; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Check if the attribute matches any of the vendor names, ignoring capitalization. |
| 72 | * |
| 73 | * @param attr The attribute |
| 74 | * @param vendorNames The vendor names |
| 75 | * |
| 76 | * @return true iff the attribute matches any of the vendor names |
| 77 | */ |
| 78 | private static boolean containsVendor(@NonNull String attr, @NonNull Set<String> vendorNames) { |
| 79 | for (String name : vendorNames) { |
| 80 | if (containsString(attr.toLowerCase(), name.toLowerCase())) { |
| 81 | return true; |
| 82 | } |
| 83 | } |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Check if a string in another string. |
| 89 | * |
| 90 | * @param container The string that contains the string |
| 91 | * @param contained The string that is contained |
| 92 | * |
| 93 | * @return true if the string is contained in the other |
| 94 | */ |
| 95 | private static boolean containsString(@NonNull String container, @NonNull String contained) { |
| 96 | return container.equalsIgnoreCase(contained) || container.contains(contained + " "); |
| 97 | } |
| 98 | } |