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   1 /**
   2  * Copyright (c) 2010-2020 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
  14 package org.openhab.binding.ipcamera.internal.onvif;
  15
  16 import java.io.BufferedReader;
  17 import java.io.IOException;
  18 import java.io.InputStreamReader;
  19 import java.math.BigDecimal;
  20 import java.net.HttpURLConnection;
  21 import java.net.InetAddress;
  22 import java.net.InetSocketAddress;
  23 import java.net.MalformedURLException;
  24 import java.net.NetworkInterface;
  25 import java.net.SocketException;
  26 import java.net.URL;
  27 import java.net.UnknownHostException;
  28 import java.nio.charset.StandardCharsets;
  29 import java.util.ArrayList;
  30 import java.util.Enumeration;
  31 import java.util.List;
  32 import java.util.UUID;
  33 import java.util.concurrent.TimeUnit;
  34
  35 import org.eclipse.jdt.annotation.NonNullByDefault;
  36 import org.eclipse.jdt.annotation.Nullable;
  37 import org.openhab.binding.ipcamera.internal.Helper;
  38 import org.openhab.binding.ipcamera.internal.IpCameraDiscoveryService;
  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 public class OnvifDiscovery {
  67     private IpCameraDiscoveryService ipCameraDiscoveryService;
  68     private final Logger logger = LoggerFactory.getLogger(OnvifDiscovery.class);
  69     public ArrayList<DatagramPacket> listOfReplys = new ArrayList<DatagramPacket>(10);
  70
  71     public OnvifDiscovery(IpCameraDiscoveryService ipCameraDiscoveryService) {
  72         this.ipCameraDiscoveryService = ipCameraDiscoveryService;
  73     }
  74
  75     public @Nullable List<NetworkInterface> getLocalNICs() {
  76         List<NetworkInterface> results = new ArrayList<>(2);
  77         try {
  78             for (Enumeration<NetworkInterface> enumNetworks = NetworkInterface.getNetworkInterfaces(); enumNetworks
  79                     .hasMoreElements();) {
  80                 NetworkInterface networkInterface = enumNetworks.nextElement();
  81                 for (Enumeration<InetAddress> enumIpAddr = networkInterface.getInetAddresses(); enumIpAddr
  82                         .hasMoreElements();) {
  83                     InetAddress inetAddress = enumIpAddr.nextElement();
  84                     if (!inetAddress.isLoopbackAddress() && inetAddress.getHostAddress().toString().length() < 18
  85                             && inetAddress.isSiteLocalAddress()) {
  86                         results.add(networkInterface);
  87                     }
  88                 }
  89             }
  90         } catch (SocketException ex) {
  91         }
  92         return results;
  93     }
  94
  95     void searchReply(String url, String xml) {
  96         String ipAddress = "";
  97         String temp = url;
  98         BigDecimal onvifPort = new BigDecimal(80);
  99
 100         logger.info("Camera found at xAddr:{}", url);
 101         int endIndex = temp.indexOf(" ");// Some xAddr have two urls with a space in between.
 102         if (endIndex > 0) {
 103             temp = temp.substring(0, endIndex);// Use only the first url from now on.
 104         }
 105
 106         int beginIndex = temp.indexOf(":") + 3;// add 3 to ignore the :// after http.
 107         int secondIndex = temp.indexOf(":", beginIndex); // find second :
 108         endIndex = temp.indexOf("/", beginIndex);
 109         if (secondIndex > beginIndex && endIndex > secondIndex) {// http://192.168.0.1:8080/onvif/device_service
 110             ipAddress = temp.substring(beginIndex, secondIndex);
 111             onvifPort = new BigDecimal(temp.substring(secondIndex + 1, endIndex));
 112         } else {// // http://192.168.0.1/onvif/device_service
 113             ipAddress = temp.substring(beginIndex, endIndex);
 114         }
 115         String brand = checkForBrand(xml);
 116         if (brand.equals("onvif")) {
 117             try {
 118                 brand = getBrandFromLoginPage(ipAddress);
 119             } catch (IOException e) {
 120                 brand = "onvif";
 121             }
 122         }
 123         ipCameraDiscoveryService.newCameraFound(brand, ipAddress, onvifPort.intValue());
 124     }
 125
 126     void processCameraReplys() {
 127         for (DatagramPacket packet : listOfReplys) {
 128             logger.trace("Device replied to discovery with:{}", packet.toString());
 129             String xml = packet.content().toString(CharsetUtil.UTF_8);
 130             String xAddr = Helper.fetchXML(xml, "", "<d:XAddrs>");
 131             if (!xAddr.equals("")) {
 132                 searchReply(xAddr, xml);
 133             } else if (xml.contains("onvif")) {
 134                 logger.info("Possible ONVIF camera found at:{}", packet.sender().getHostString());
 135                 ipCameraDiscoveryService.newCameraFound("onvif", packet.sender().getHostString(), 80);
 136             }
 137         }
 138     }
 139
 140     String checkForBrand(String response) {
 141         if (response.toLowerCase().contains("amcrest")) {
 142             return "dahua";
 143         } else if (response.toLowerCase().contains("dahua")) {
 144             return "dahua";
 145         } else if (response.toLowerCase().contains("foscam")) {
 146             return "foscam";
 147         } else if (response.toLowerCase().contains("hikvision")) {
 148             return "hikvision";
 149         } else if (response.toLowerCase().contains("instar")) {
 150             return "instar";
 151         } else if (response.toLowerCase().contains("doorbird")) {
 152             return "doorbird";
 153         } else if (response.toLowerCase().contains("ipc-")) {
 154             return "dahua";
 155         } else if (response.toLowerCase().contains("dh-sd")) {
 156             return "dahua";
 157         }
 158         return "onvif";
 159     }
 160
 161     public String getBrandFromLoginPage(String hostname) throws IOException {
 162         URL url = new URL("http://" + hostname);
 163         String brand = "onvif";
 164         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 165         connection.setConnectTimeout(1000);
 166         connection.setReadTimeout(2000);
 167         connection.setInstanceFollowRedirects(true);
 168         connection.setRequestMethod("GET");
 169         try {
 170             connection.connect();
 171             BufferedReader reply = new BufferedReader(new InputStreamReader(connection.getInputStream()));
 172             String response = "";
 173             String temp;
 174             while ((temp = reply.readLine()) != null) {
 175                 response += temp;
 176             }
 177             reply.close();
 178             logger.trace("Cameras Login page is:{}", response);
 179             brand = checkForBrand(response);
 180         } catch (MalformedURLException e) {
 181         } finally {
 182             connection.disconnect();
 183         }
 184         return brand;
 185     }
 186
 187     private DatagramPacket wsDiscovery() throws UnknownHostException {
 188         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:"
 189                 + UUID.randomUUID()
 190                 + "</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>";
 191         ByteBuf discoveryProbeMessage = Unpooled.copiedBuffer(xml, 0, xml.length(), StandardCharsets.UTF_8);
 192         return new DatagramPacket(discoveryProbeMessage,
 193                 new InetSocketAddress(InetAddress.getByName("239.255.255.250"), 3702), new InetSocketAddress(0));
 194     }
 195
 196     public void discoverCameras() throws UnknownHostException, InterruptedException {
 197         List<NetworkInterface> nics = getLocalNICs();
 198         if (nics == null || nics.isEmpty()) {
 199             return;
 200         }
 201         NetworkInterface networkInterface = nics.get(0);
 202         Bootstrap bootstrap = new Bootstrap().group(new NioEventLoopGroup())
 203                 .channelFactory(new ChannelFactory<NioDatagramChannel>() {
 204                     @Override
 205                     public NioDatagramChannel newChannel() {
 206                         return new NioDatagramChannel(InternetProtocolFamily.IPv4);
 207                     }
 208                 }).handler(new SimpleChannelInboundHandler<DatagramPacket>() {
 209                     @Override
 210                     protected void channelRead0(@Nullable ChannelHandlerContext ctx, DatagramPacket msg)
 211                             throws Exception {
 212                         msg.retain(1);
 213                         listOfReplys.add(msg);
 214                     }
 215                 }).option(ChannelOption.SO_BROADCAST, true).option(ChannelOption.SO_REUSEADDR, true)
 216                 .option(ChannelOption.IP_MULTICAST_LOOP_DISABLED, false).option(ChannelOption.SO_RCVBUF, 2048)
 217                 .option(ChannelOption.IP_MULTICAST_TTL, 255).option(ChannelOption.IP_MULTICAST_IF, networkInterface);
 218         ChannelGroup openChannels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
 219         for (NetworkInterface nic : nics) {
 220             DatagramChannel datagramChannel = (DatagramChannel) bootstrap.option(ChannelOption.IP_MULTICAST_IF, nic)
 221                     .bind(new InetSocketAddress(0)).sync().channel();
 222             datagramChannel
 223                     .joinGroup(new InetSocketAddress(InetAddress.getByName("239.255.255.250"), 3702), networkInterface)
 224                     .sync();
 225             openChannels.add(datagramChannel);
 226         }
 227         if (!openChannels.isEmpty()) {
 228             openChannels.writeAndFlush(wsDiscovery());
 229             TimeUnit.SECONDS.sleep(6);
 230             openChannels.close();
 231             processCameraReplys();
 232             bootstrap.config().group().shutdownGracefully();
 233         }
 234     }
 235 }