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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.openhab.core.net.NetworkAddressService;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 import io.netty.bootstrap.Bootstrap;
  43 import io.netty.buffer.ByteBuf;
  44 import io.netty.buffer.Unpooled;
  45 import io.netty.channel.ChannelFactory;
  46 import io.netty.channel.ChannelHandlerContext;
  47 import io.netty.channel.ChannelOption;
  48 import io.netty.channel.SimpleChannelInboundHandler;
  49 import io.netty.channel.group.ChannelGroup;
  50 import io.netty.channel.group.DefaultChannelGroup;
  51 import io.netty.channel.nio.NioEventLoopGroup;
  52 import io.netty.channel.socket.DatagramChannel;
  53 import io.netty.channel.socket.DatagramPacket;
  54 import io.netty.channel.socket.InternetProtocolFamily;
  55 import io.netty.channel.socket.nio.NioDatagramChannel;
  56 import io.netty.util.CharsetUtil;
  57 import io.netty.util.concurrent.GlobalEventExecutor;
  58
  59 /**
  60  * The {@link OnvifDiscovery} is responsible for finding cameras that are ONVIF using UDP multicast.
  61  *
  62  * @author Matthew Skinner - Initial contribution
  63  */
  64
  65 @NonNullByDefault
  66 @io.netty.channel.ChannelHandler.Sharable
  67 public class OnvifDiscovery {
  68     private IpCameraDiscoveryService ipCameraDiscoveryService;
  69     private final Logger logger = LoggerFactory.getLogger(OnvifDiscovery.class);
  70     private final NetworkAddressService networkAddressService;
  71     public ArrayList<DatagramPacket> listOfReplys = new ArrayList<DatagramPacket>(10);
  72
  73     public OnvifDiscovery(NetworkAddressService networkAddressService,
  74             IpCameraDiscoveryService ipCameraDiscoveryService) {
  75         this.ipCameraDiscoveryService = ipCameraDiscoveryService;
  76         this.networkAddressService = networkAddressService;
  77     }
  78
  79     public @Nullable List<NetworkInterface> getLocalNICs() {
  80         String primaryHostAddress = networkAddressService.getPrimaryIpv4HostAddress();
  81         List<NetworkInterface> results = new ArrayList<>(2);
  82         try {
  83             for (Enumeration<NetworkInterface> enumNetworks = NetworkInterface.getNetworkInterfaces(); enumNetworks
  84                     .hasMoreElements();) {
  85                 NetworkInterface networkInterface = enumNetworks.nextElement();
  86                 for (Enumeration<InetAddress> enumIpAddr = networkInterface.getInetAddresses(); enumIpAddr
  87                         .hasMoreElements();) {
  88                     InetAddress inetAddress = enumIpAddr.nextElement();
  89                     if (!inetAddress.isLoopbackAddress() && inetAddress.getHostAddress().toString().length() < 18
  90                             && inetAddress.isSiteLocalAddress()) {
  91                         if (inetAddress.getHostAddress().equals(primaryHostAddress)) {
  92                             results.add(networkInterface);
  93                             logger.debug("Scanning network {} for any ONVIF cameras", primaryHostAddress);
  94                         } else {
  95                             logger.debug("Skipping network {} as it was not selected as openHAB's 'Primary Address'",
  96                                     inetAddress.getHostAddress());
  97                         }
  98                     } else {
  99                         logger.debug("Skipping network {} as it was not site local", inetAddress.getHostAddress());
 100                     }
 101                 }
 102             }
 103         } catch (SocketException ex) {
 104         }
 105         return results;
 106     }
 107
 108     void searchReply(String url, String xml) {
 109         String ipAddress = "";
 110         String temp = url;
 111         BigDecimal onvifPort = new BigDecimal(80);
 112
 113         logger.info("Camera found at xAddr:{}", url);
 114         int endIndex = temp.indexOf(" ");// Some xAddr have two urls with a space in between.
 115         if (endIndex > 0) {
 116             temp = temp.substring(0, endIndex);// Use only the first url from now on.
 117         }
 118
 119         int beginIndex = temp.indexOf(":") + 3;// add 3 to ignore the :// after http.
 120         int secondIndex = temp.indexOf(":", beginIndex); // find second :
 121         endIndex = temp.indexOf("/", beginIndex);
 122         if (secondIndex > beginIndex && endIndex > secondIndex) {// http://192.168.0.1:8080/onvif/device_service
 123             ipAddress = temp.substring(beginIndex, secondIndex);
 124             onvifPort = new BigDecimal(temp.substring(secondIndex + 1, endIndex));
 125         } else {// // http://192.168.0.1/onvif/device_service
 126             ipAddress = temp.substring(beginIndex, endIndex);
 127         }
 128         String brand = checkForBrand(xml);
 129         if ("onvif".equals(brand)) {
 130             try {
 131                 brand = getBrandFromLoginPage(ipAddress);
 132             } catch (IOException e) {
 133                 brand = "onvif";
 134             }
 135         }
 136         ipCameraDiscoveryService.newCameraFound(brand, ipAddress, onvifPort.intValue());
 137     }
 138
 139     void processCameraReplys() {
 140         for (DatagramPacket packet : listOfReplys) {
 141             String xml = packet.content().toString(CharsetUtil.UTF_8);
 142             logger.trace("Device replied to discovery with:{}", xml);
 143             String xAddr = Helper.fetchXML(xml, "", "d:XAddrs>");// Foscam <wsdd:XAddrs> and all other brands <d:XAddrs>
 144             if (!xAddr.isEmpty()) {
 145                 searchReply(xAddr, xml);
 146             } else if (xml.contains("onvif")) {
 147                 String brand;
 148                 try {
 149                     brand = getBrandFromLoginPage(packet.sender().getHostString());
 150                 } catch (IOException e) {
 151                     brand = "onvif";
 152                 }
 153                 logger.info("Possible {} camera found at:{}", brand, packet.sender().getHostString());
 154                 if ("reolink".equals(brand)) {
 155                     ipCameraDiscoveryService.newCameraFound(brand, packet.sender().getHostString(), 8000);
 156                 } else {
 157                     ipCameraDiscoveryService.newCameraFound(brand, packet.sender().getHostString(), 80);
 158                 }
 159             }
 160         }
 161     }
 162
 163     String checkForBrand(String response) {
 164         if (response.toLowerCase().contains("amcrest")) {
 165             return "dahua";
 166         } else if (response.toLowerCase().contains("dahua")) {
 167             return "dahua";
 168         } else if (response.toLowerCase().contains("doorbird")) {
 169             return "doorbird";
 170         } else if (response.toLowerCase().contains("foscam")) {
 171             return "foscam";
 172         } else if (response.toLowerCase().contains("hikvision")) {
 173             return "hikvision";
 174         } else if (response.toLowerCase().contains("instar")) {
 175             return "instar";
 176         } else if (response.toLowerCase().contains("reolink")) {
 177             return "reolink";
 178         } else if (response.toLowerCase().contains("ipc-")) {
 179             return "dahua";
 180         } else if (response.toLowerCase().contains("dh-sd")) {
 181             return "dahua";
 182         }
 183         return "onvif";
 184     }
 185
 186     public String getBrandFromLoginPage(String hostname) throws IOException {
 187         URL url = new URL("http://" + hostname);
 188         String brand = "onvif";
 189         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 190         connection.setConnectTimeout(1000);
 191         connection.setReadTimeout(2000);
 192         connection.setInstanceFollowRedirects(true);
 193         connection.setRequestMethod("GET");
 194         try {
 195             connection.connect();
 196             BufferedReader reply = new BufferedReader(new InputStreamReader(connection.getInputStream()));
 197             String response = "";
 198             String temp;
 199             while ((temp = reply.readLine()) != null) {
 200                 response += temp;
 201             }
 202             reply.close();
 203             logger.trace("Cameras Login page is:{}", response);
 204             brand = checkForBrand(response);
 205         } catch (MalformedURLException e) {
 206         } finally {
 207             connection.disconnect();
 208         }
 209         return brand;
 210     }
 211
 212     private DatagramPacket wsDiscovery() throws UnknownHostException {
 213         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:"
 214                 + UUID.randomUUID()
 215                 + "</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>";
 216         ByteBuf discoveryProbeMessage = Unpooled.copiedBuffer(xml, 0, xml.length(), StandardCharsets.UTF_8);
 217         return new DatagramPacket(discoveryProbeMessage,
 218                 new InetSocketAddress(InetAddress.getByName("239.255.255.250"), 3702), new InetSocketAddress(0));
 219     }
 220
 221     public void discoverCameras() throws UnknownHostException, InterruptedException {
 222         List<NetworkInterface> nics = getLocalNICs();
 223         if (nics == null || nics.isEmpty()) {
 224             logger.warn(
 225                     "No 'Primary Address' selected to use for camera discovery. Check openHAB's Network Settings page to select a valid Primary Address.");
 226             return;
 227         }
 228         NetworkInterface networkInterface = nics.get(0);
 229         Bootstrap bootstrap = new Bootstrap().group(new NioEventLoopGroup())
 230                 .channelFactory(new ChannelFactory<NioDatagramChannel>() {
 231                     @Override
 232                     public NioDatagramChannel newChannel() {
 233                         return new NioDatagramChannel(InternetProtocolFamily.IPv4);
 234                     }
 235                 }).handler(new SimpleChannelInboundHandler<DatagramPacket>() {
 236                     @Override
 237                     protected void channelRead0(@Nullable ChannelHandlerContext ctx, DatagramPacket msg)
 238                             throws Exception {
 239                         msg.retain(1);
 240                         listOfReplys.add(msg);
 241                     }
 242                 }).option(ChannelOption.SO_BROADCAST, true).option(ChannelOption.SO_REUSEADDR, true)
 243                 .option(ChannelOption.IP_MULTICAST_LOOP_DISABLED, false).option(ChannelOption.SO_RCVBUF, 2048)
 244                 .option(ChannelOption.IP_MULTICAST_TTL, 255).option(ChannelOption.IP_MULTICAST_IF, networkInterface);
 245         ChannelGroup openChannels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
 246         for (NetworkInterface nic : nics) {
 247             DatagramChannel datagramChannel = (DatagramChannel) bootstrap.option(ChannelOption.IP_MULTICAST_IF, nic)
 248                     .bind(new InetSocketAddress(0)).sync().channel();
 249             datagramChannel
 250                     .joinGroup(new InetSocketAddress(InetAddress.getByName("239.255.255.250"), 3702), networkInterface)
 251                     .sync();
 252             openChannels.add(datagramChannel);
 253         }
 254         if (!openChannels.isEmpty()) {
 255             openChannels.writeAndFlush(wsDiscovery());
 256             TimeUnit.SECONDS.sleep(6);
 257             openChannels.close();
 258             processCameraReplys();
 259             bootstrap.config().group().shutdownGracefully();
 260         }
 261     }
 262 }