luca | 8941a31 | 2014-09-02 17:51:06 -0700 | [diff] [blame] | 1 | package net.onrc.onos.apps.sdnip; |
| 2 | |
| 3 | import java.io.File; |
| 4 | import java.io.IOException; |
| 5 | import java.net.InetAddress; |
| 6 | import java.util.ArrayList; |
| 7 | import java.util.Collection; |
| 8 | import java.util.Collections; |
| 9 | import java.util.HashMap; |
| 10 | import java.util.HashSet; |
| 11 | import java.util.Iterator; |
| 12 | import java.util.Map; |
| 13 | import java.util.Set; |
| 14 | |
| 15 | import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| 16 | import net.floodlightcontroller.core.module.FloodlightModuleException; |
| 17 | import net.floodlightcontroller.core.module.IFloodlightModule; |
| 18 | import net.floodlightcontroller.core.module.IFloodlightService; |
| 19 | import net.floodlightcontroller.util.MACAddress; |
| 20 | import net.onrc.onos.core.main.config.IConfigInfoService; |
| 21 | import net.onrc.onos.core.util.SwitchPort; |
| 22 | |
| 23 | import org.apache.commons.configuration.ConfigurationRuntimeException; |
| 24 | import org.codehaus.jackson.JsonParseException; |
| 25 | import org.codehaus.jackson.map.JsonMappingException; |
| 26 | import org.codehaus.jackson.map.ObjectMapper; |
| 27 | import org.slf4j.Logger; |
| 28 | import org.slf4j.LoggerFactory; |
| 29 | |
| 30 | import com.googlecode.concurrenttrees.radix.node.concrete.DefaultByteArrayNodeFactory; |
| 31 | import com.googlecode.concurrenttrees.radixinverted.ConcurrentInvertedRadixTree; |
| 32 | import com.googlecode.concurrenttrees.radixinverted.InvertedRadixTree; |
| 33 | |
| 34 | /** |
| 35 | * SDN-IP Config Reader provides IConfigInfoService |
| 36 | * by reading from an SDN-IP configuration file. |
| 37 | * It must be enabled on the nodes within the cluster |
| 38 | * not running SDN-IP. |
| 39 | * <p/> |
| 40 | * TODO: As a long term solution, a module providing |
| 41 | * general network configuration to ONOS nodes should be used. |
| 42 | */ |
| 43 | public class SdnIpConfigReader implements IFloodlightModule, IConfigInfoService { |
| 44 | |
| 45 | private static final Logger log = LoggerFactory.getLogger(SdnIpConfigReader.class); |
| 46 | |
| 47 | private static final String DEFAULT_CONFIG_FILENAME = "config.json"; |
| 48 | private String currentConfigFilename = DEFAULT_CONFIG_FILENAME; |
| 49 | private Map<String, Interface> interfaces; |
| 50 | private Map<InetAddress, BgpPeer> bgpPeers; |
| 51 | private MACAddress bgpdMacAddress; |
| 52 | private short vlan; |
| 53 | private InvertedRadixTree<Interface> interfaceRoutes; |
| 54 | private Set<SwitchPort> externalNetworkSwitchPorts; |
| 55 | |
| 56 | /** |
| 57 | * Reads the info contained in the configuration file. |
| 58 | * |
| 59 | * @param configFilename The name of configuration file for SDN-IP application. |
| 60 | */ |
| 61 | private void readConfiguration(String configFilename) { |
| 62 | File gatewaysFile = new File(configFilename); |
| 63 | ObjectMapper mapper = new ObjectMapper(); |
| 64 | |
| 65 | try { |
| 66 | Configuration config = mapper.readValue(gatewaysFile, Configuration.class); |
| 67 | interfaces = new HashMap<>(); |
| 68 | for (Interface intf : config.getInterfaces()) { |
| 69 | interfaces.put(intf.getName(), intf); |
| 70 | externalNetworkSwitchPorts.add(new SwitchPort(intf.getDpid(), |
| 71 | intf.getPort())); |
| 72 | } |
| 73 | bgpPeers = new HashMap<>(); |
| 74 | for (BgpPeer peer : config.getPeers()) { |
| 75 | bgpPeers.put(peer.getIpAddress(), peer); |
| 76 | } |
| 77 | bgpdMacAddress = config.getBgpdMacAddress(); |
| 78 | vlan = config.getVlan(); |
| 79 | } catch (JsonParseException | JsonMappingException e) { |
| 80 | log.error("Error in JSON file", e); |
| 81 | throw new ConfigurationRuntimeException("Error in JSON file", e); |
| 82 | } catch (IOException e) { |
| 83 | log.error("Error reading JSON file", e); |
| 84 | throw new ConfigurationRuntimeException("Error in JSON file", e); |
| 85 | } |
| 86 | |
| 87 | // Populate the interface InvertedRadixTree |
| 88 | for (Interface intf : interfaces.values()) { |
| 89 | Prefix prefix = new Prefix(intf.getIpAddress().getAddress(), |
| 90 | intf.getPrefixLength()); |
| 91 | interfaceRoutes.put(prefix.toBinaryString(), intf); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * To find the Interface which has longest matchable IP prefix (sub-network |
| 97 | * prefix) to next hop IP address. |
| 98 | * |
| 99 | * @param address the IP address of next hop router |
| 100 | * @return Interface the Interface which has longest matchable IP prefix |
| 101 | */ |
| 102 | private Interface longestInterfacePrefixMatch(InetAddress address) { |
| 103 | Prefix prefixToSearchFor = new Prefix(address.getAddress(), |
| 104 | Prefix.MAX_PREFIX_LENGTH); |
| 105 | Iterator<Interface> it = |
| 106 | interfaceRoutes.getValuesForKeysPrefixing( |
| 107 | prefixToSearchFor.toBinaryString()).iterator(); |
| 108 | Interface intf = null; |
| 109 | // Find the last prefix, which will be the longest prefix |
| 110 | while (it.hasNext()) { |
| 111 | intf = it.next(); |
| 112 | } |
| 113 | |
| 114 | return intf; |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public boolean isInterfaceAddress(InetAddress address) { |
| 119 | Interface intf = longestInterfacePrefixMatch(address); |
| 120 | return (intf != null && intf.getIpAddress().equals(address)); |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | public boolean inConnectedNetwork(InetAddress address) { |
| 125 | Interface intf = longestInterfacePrefixMatch(address); |
| 126 | return (intf != null && !intf.getIpAddress().equals(address)); |
| 127 | } |
| 128 | |
| 129 | @Override |
| 130 | public boolean fromExternalNetwork(long inDpid, short inPort) { |
| 131 | for (Interface intf : interfaces.values()) { |
| 132 | if (intf.getDpid() == inDpid && intf.getPort() == inPort) { |
| 133 | return true; |
| 134 | } |
| 135 | } |
| 136 | return false; |
| 137 | } |
| 138 | |
| 139 | @Override |
| 140 | public Interface getOutgoingInterface(InetAddress dstIpAddress) { |
| 141 | return longestInterfacePrefixMatch(dstIpAddress); |
| 142 | } |
| 143 | |
| 144 | @Override |
| 145 | public boolean hasLayer3Configuration() { |
| 146 | return !interfaces.isEmpty(); |
| 147 | } |
| 148 | |
| 149 | @Override |
| 150 | public MACAddress getRouterMacAddress() { |
| 151 | return bgpdMacAddress; |
| 152 | } |
| 153 | |
| 154 | @Override |
| 155 | public short getVlan() { |
| 156 | return vlan; |
| 157 | } |
| 158 | |
| 159 | @Override |
| 160 | public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
| 161 | Collection<Class<? extends IFloodlightService>> l = new ArrayList<>(); |
| 162 | l.add(IConfigInfoService.class); |
| 163 | return l; |
| 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public Map<Class<? extends IFloodlightService>, IFloodlightService> getServiceImpls() { |
| 168 | Map<Class<? extends IFloodlightService>, IFloodlightService> m = new HashMap<>(); |
| 169 | m.put(IConfigInfoService.class, this); |
| 170 | return m; |
| 171 | } |
| 172 | |
| 173 | @Override |
| 174 | public Collection<Class<? extends IFloodlightService>> getModuleDependencies() { |
| 175 | return null; |
| 176 | } |
| 177 | |
| 178 | @Override |
| 179 | public void init(FloodlightModuleContext context) throws FloodlightModuleException { |
| 180 | interfaceRoutes = new ConcurrentInvertedRadixTree<>( |
| 181 | new DefaultByteArrayNodeFactory()); |
| 182 | externalNetworkSwitchPorts = new HashSet<SwitchPort>(); |
| 183 | // Reading config values |
| 184 | String configFilenameParameter = context.getConfigParams(this).get("configfile"); |
| 185 | if (configFilenameParameter != null) { |
| 186 | currentConfigFilename = configFilenameParameter; |
| 187 | } |
| 188 | log.debug("Config file set to {}", currentConfigFilename); |
| 189 | |
| 190 | readConfiguration(currentConfigFilename); |
| 191 | } |
| 192 | |
| 193 | @Override |
| 194 | public void startUp(FloodlightModuleContext context) throws FloodlightModuleException { |
| 195 | } |
| 196 | |
| 197 | @Override |
| 198 | public Set<SwitchPort> getExternalSwitchPorts() { |
| 199 | return Collections.unmodifiableSet(externalNetworkSwitchPorts); |
| 200 | } |
| 201 | } |