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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.ipcamera.internal.onvif;
  14
  15 import java.io.BufferedReader;
  16 import java.io.IOException;
  17 import java.io.InputStreamReader;
  18 import java.math.BigDecimal;
  19 import java.net.HttpURLConnection;
  20 import java.net.InetAddress;
  21 import java.net.InetSocketAddress;
  22 import java.net.MalformedURLException;
  23 import java.net.NetworkInterface;
  24 import java.net.SocketException;
  25 import java.net.URL;
  26 import java.net.UnknownHostException;
  27 import java.nio.charset.StandardCharsets;
  28 import java.util.ArrayList;
  29 import java.util.Enumeration;
  30 import java.util.List;
  31 import java.util.UUID;
  32 import java.util.concurrent.TimeUnit;
  33
  34 import org.eclipse.jdt.annotation.NonNullByDefault;
  35 import org.eclipse.jdt.annotation.Nullable;
  36 import org.openhab.binding.ipcamera.internal.Helper;
  37 import org.openhab.binding.ipcamera.internal.IpCameraDiscoveryService;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 import io.netty.bootstrap.Bootstrap;
  42 import io.netty.buffer.ByteBuf;
  43 import io.netty.buffer.Unpooled;
  44 import io.netty.channel.ChannelFactory;
  45 import io.netty.channel.ChannelHandlerContext;
  46 import io.netty.channel.ChannelOption;
  47 import io.netty.channel.SimpleChannelInboundHandler;
  48 import io.netty.channel.group.ChannelGroup;
  49 import io.netty.channel.group.DefaultChannelGroup;
  50 import io.netty.channel.nio.NioEventLoopGroup;
  51 import io.netty.channel.socket.DatagramChannel;
  52 import io.netty.channel.socket.DatagramPacket;
  53 import io.netty.channel.socket.InternetProtocolFamily;
  54 import io.netty.channel.socket.nio.NioDatagramChannel;
  55 import io.netty.util.CharsetUtil;
  56 import io.netty.util.concurrent.GlobalEventExecutor;
  57
  58 /**
  59  * The {@link OnvifDiscovery} is responsible for finding cameras that are ONVIF using UDP multicast.
  60  *
  61  * @author Matthew Skinner - Initial contribution
  62  */
  63
  64 @NonNullByDefault
  65 public class OnvifDiscovery {
  66     private IpCameraDiscoveryService ipCameraDiscoveryService;
  67     private final Logger logger = LoggerFactory.getLogger(OnvifDiscovery.class);
  68     public ArrayList<DatagramPacket> listOfReplys = new ArrayList<DatagramPacket>(10);
  69
  70     public OnvifDiscovery(IpCameraDiscoveryService ipCameraDiscoveryService) {
  71         this.ipCameraDiscoveryService = ipCameraDiscoveryService;
  72     }
  73
  74     public @Nullable List<NetworkInterface> getLocalNICs() {
  75         List<NetworkInterface> results = new ArrayList<>(2);
  76         try {
  77             for (Enumeration<NetworkInterface> enumNetworks = NetworkInterface.getNetworkInterfaces(); enumNetworks
  78                     .hasMoreElements();) {
  79                 NetworkInterface networkInterface = enumNetworks.nextElement();
  80                 for (Enumeration<InetAddress> enumIpAddr = networkInterface.getInetAddresses(); enumIpAddr
  81                         .hasMoreElements();) {
  82                     InetAddress inetAddress = enumIpAddr.nextElement();
  83                     if (!inetAddress.isLoopbackAddress() && inetAddress.getHostAddress().toString().length() < 18
  84                             && inetAddress.isSiteLocalAddress()) {
  85                         results.add(networkInterface);
  86                     }
  87                 }
  88             }
  89         } catch (SocketException ex) {
  90         }
  91         return results;
  92     }
  93
  94     void searchReply(String url, String xml) {
  95         String ipAddress = "";
  96         String temp = url;
  97         BigDecimal onvifPort = new BigDecimal(80);
  98
  99         logger.info("Camera found at xAddr:{}", url);
 100         int endIndex = temp.indexOf(" ");// Some xAddr have two urls with a space in between.
 101         if (endIndex > 0) {
 102             temp = temp.substring(0, endIndex);// Use only the first url from now on.
 103         }
 104
 105         int beginIndex = temp.indexOf(":") + 3;// add 3 to ignore the :// after http.
 106         int secondIndex = temp.indexOf(":", beginIndex); // find second :
 107         endIndex = temp.indexOf("/", beginIndex);
 108         if (secondIndex > beginIndex && endIndex > secondIndex) {// http://192.168.0.1:8080/onvif/device_service
 109             ipAddress = temp.substring(beginIndex, secondIndex);
 110             onvifPort = new BigDecimal(temp.substring(secondIndex + 1, endIndex));
 111         } else {// // http://192.168.0.1/onvif/device_service
 112             ipAddress = temp.substring(beginIndex, endIndex);
 113         }
 114         String brand = checkForBrand(xml);
 115         if ("onvif".equals(brand)) {
 116             try {
 117                 brand = getBrandFromLoginPage(ipAddress);
 118             } catch (IOException e) {
 119                 brand = "onvif";
 120             }
 121         }
 122         ipCameraDiscoveryService.newCameraFound(brand, ipAddress, onvifPort.intValue());
 123     }
 124
 125     void processCameraReplys() {
 126         for (DatagramPacket packet : listOfReplys) {
 127             String xml = packet.content().toString(CharsetUtil.UTF_8);
 128             logger.trace("Device replied to discovery with:{}", xml);
 129             String xAddr = Helper.fetchXML(xml, "", "d:XAddrs>");// Foscam <wsdd:XAddrs> and all other brands <d:XAddrs>
 130             if (!xAddr.isEmpty()) {
 131                 searchReply(xAddr, xml);
 132             } else if (xml.contains("onvif")) {
 133                 logger.info("Possible ONVIF camera found at:{}", packet.sender().getHostString());
 134                 ipCameraDiscoveryService.newCameraFound("onvif", packet.sender().getHostString(), 80);
 135             }
 136         }
 137     }
 138
 139     String checkForBrand(String response) {
 140         if (response.toLowerCase().contains("amcrest")) {
 141             return "dahua";
 142         } else if (response.toLowerCase().contains("dahua")) {
 143             return "dahua";
 144         } else if (response.toLowerCase().contains("foscam")) {
 145             return "foscam";
 146         } else if (response.toLowerCase().contains("hikvision")) {
 147             return "hikvision";
 148         } else if (response.toLowerCase().contains("instar")) {
 149             return "instar";
 150         } else if (response.toLowerCase().contains("doorbird")) {
 151             return "doorbird";
 152         } else if (response.toLowerCase().contains("ipc-")) {
 153             return "dahua";
 154         } else if (response.toLowerCase().contains("dh-sd")) {
 155             return "dahua";
 156         }
 157         return "onvif";
 158     }
 159
 160     public String getBrandFromLoginPage(String hostname) throws IOException {
 161         URL url = new URL("http://" + hostname);
 162         String brand = "onvif";
 163         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 164         connection.setConnectTimeout(1000);
 165         connection.setReadTimeout(2000);
 166         connection.setInstanceFollowRedirects(true);
 167         connection.setRequestMethod("GET");
 168         try {
 169             connection.connect();
 170             BufferedReader reply = new BufferedReader(new InputStreamReader(connection.getInputStream()));
 171             String response = "";
 172             String temp;
 173             while ((temp = reply.readLine()) != null) {
 174                 response += temp;
 175             }
 176             reply.close();
 177             logger.trace("Cameras Login page is:{}", response);
 178             brand = checkForBrand(response);
 179         } catch (MalformedURLException e) {
 180         } finally {
 181             connection.disconnect();
 182         }
 183         return brand;
 184     }
 185
 186     private DatagramPacket wsDiscovery() throws UnknownHostException {
 187         String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><e:Envelope xmlns:e=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:w=\"http://schemas.xmlsoap.org/ws/2004/08/addressing\" xmlns:d=\"http://schemas.xmlsoap.org/ws/2005/04/discovery\" xmlns:dn=\"http://www.onvif.org/ver10/network/wsdl\"><e:Header><w:MessageID>uuid:"
 188                 + UUID.randomUUID()
 189                 + "</w:MessageID><w:To e:mustUnderstand=\"true\">urn:schemas-xmlsoap-org:ws:2005:04:discovery</w:To><w:Action a:mustUnderstand=\"true\">http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</w:Action></e:Header><e:Body><d:Probe><d:Types xmlns:d=\"http://schemas.xmlsoap.org/ws/2005/04/discovery\" xmlns:dp0=\"http://www.onvif.org/ver10/network/wsdl\">dp0:NetworkVideoTransmitter</d:Types></d:Probe></e:Body></e:Envelope>";
 190         ByteBuf discoveryProbeMessage = Unpooled.copiedBuffer(xml, 0, xml.length(), StandardCharsets.UTF_8);
 191         return new DatagramPacket(discoveryProbeMessage,
 192                 new InetSocketAddress(InetAddress.getByName("239.255.255.250"), 3702), new InetSocketAddress(0));
 193     }
 194
 195     public void discoverCameras() throws UnknownHostException, InterruptedException {
 196         List<NetworkInterface> nics = getLocalNICs();
 197         if (nics == null || nics.isEmpty()) {
 198             return;
 199         }
 200         NetworkInterface networkInterface = nics.get(0);
 201         Bootstrap bootstrap = new Bootstrap().group(new NioEventLoopGroup())
 202                 .channelFactory(new ChannelFactory<NioDatagramChannel>() {
 203                     @Override
 204                     public NioDatagramChannel newChannel() {
 205                         return new NioDatagramChannel(InternetProtocolFamily.IPv4);
 206                     }
 207                 }).handler(new SimpleChannelInboundHandler<DatagramPacket>() {
 208                     @Override
 209                     protected void channelRead0(@Nullable ChannelHandlerContext ctx, DatagramPacket msg)
 210                             throws Exception {
 211                         msg.retain(1);
 212                         listOfReplys.add(msg);
 213                     }
 214                 }).option(ChannelOption.SO_BROADCAST, true).option(ChannelOption.SO_REUSEADDR, true)
 215                 .option(ChannelOption.IP_MULTICAST_LOOP_DISABLED, false).option(ChannelOption.SO_RCVBUF, 2048)
 216                 .option(ChannelOption.IP_MULTICAST_TTL, 255).option(ChannelOption.IP_MULTICAST_IF, networkInterface);
 217         ChannelGroup openChannels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
 218         for (NetworkInterface nic : nics) {
 219             DatagramChannel datagramChannel = (DatagramChannel) bootstrap.option(ChannelOption.IP_MULTICAST_IF, nic)
 220                     .bind(new InetSocketAddress(0)).sync().channel();
 221             datagramChannel
 222                     .joinGroup(new InetSocketAddress(InetAddress.getByName("239.255.255.250"), 3702), networkInterface)
 223                     .sync();
 224             openChannels.add(datagramChannel);
 225         }
 226         if (!openChannels.isEmpty()) {
 227             openChannels.writeAndFlush(wsDiscovery());
 228             TimeUnit.SECONDS.sleep(6);
 229             openChannels.close();
 230             processCameraReplys();
 231             bootstrap.config().group().shutdownGracefully();
 232         }
 233     }
 234 }