| package net.onrc.onos.ofcontroller.bgproute; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import net.floodlightcontroller.core.IFloodlightProviderService; |
| import net.floodlightcontroller.core.IOFSwitch; |
| |
| import org.openflow.protocol.OFFlowMod; |
| import org.openflow.protocol.OFMessage; |
| import org.openflow.protocol.OFPort; |
| import org.openflow.util.HexString; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class FlowCache { |
| private final static Logger log = LoggerFactory.getLogger(FlowCache.class); |
| |
| private IFloodlightProviderService floodlightProvider; |
| |
| private Map<Long, List<OFFlowMod>> flowCache; |
| |
| private Comparator<OFFlowMod> cookieComparator = new Comparator<OFFlowMod>() { |
| @Override |
| public int compare(OFFlowMod fm1, OFFlowMod fm2) { |
| long difference = fm2.getCookie() - fm1.getCookie(); |
| |
| if (difference > 0) { |
| return 1; |
| } |
| else if (difference < 0) { |
| return -1; |
| } |
| else { |
| return 0; |
| } |
| } |
| }; |
| |
| public FlowCache(IFloodlightProviderService floodlightProvider) { |
| this.floodlightProvider = floodlightProvider; |
| |
| flowCache = new HashMap<Long, List<OFFlowMod>>(); |
| } |
| |
| public synchronized void write(long dpid, OFFlowMod flowMod) { |
| List<OFFlowMod> flowModList = new ArrayList<OFFlowMod>(1); |
| flowModList.add(flowMod); |
| write(dpid, flowModList); |
| } |
| |
| public synchronized void write(long dpid, List<OFFlowMod> flowMods) { |
| ensureCacheForSwitch(dpid); |
| |
| List<OFFlowMod> clones = new ArrayList<OFFlowMod>(flowMods.size()); |
| |
| //Somehow the OFFlowMods we get passed in will change later on. |
| //No idea how this happens, but we can just clone to prevent problems |
| try { |
| for (OFFlowMod fm : flowMods) { |
| clones.add(fm.clone()); |
| } |
| } catch (CloneNotSupportedException e) { |
| log.debug("Clone exception", e); |
| } |
| |
| flowCache.get(dpid).addAll(clones); |
| |
| IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| |
| if (sw == null) { |
| log.debug("Switch not found when writing flow mods"); |
| return; |
| } |
| |
| List<OFMessage> msgList = new ArrayList<OFMessage>(clones.size()); |
| msgList.addAll(clones); |
| |
| try { |
| sw.write(msgList, null); |
| } catch (IOException e) { |
| log.error("Error writing to switch", e); |
| } |
| |
| |
| } |
| |
| public synchronized void delete(long dpid, OFFlowMod flowMod) { |
| List<OFFlowMod> flowModList = new ArrayList<OFFlowMod>(1); |
| flowModList.add(flowMod); |
| delete(dpid, flowModList); |
| } |
| |
| public synchronized void delete(long dpid, List<OFFlowMod> flowMods) { |
| ensureCacheForSwitch(dpid); |
| |
| //Remove the flow mods from the cache first before we alter them |
| flowCache.get(dpid).removeAll(flowMods); |
| |
| //Alter the original flow mods to make them delete flow mods |
| for (OFFlowMod fm : flowMods) { |
| fm.setCommand(OFFlowMod.OFPFC_DELETE_STRICT) |
| .setOutPort(OFPort.OFPP_NONE) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH); |
| |
| fm.getActions().clear(); |
| } |
| |
| IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| if (sw == null) { |
| log.debug("Switch not found when writing flow mods"); |
| return; |
| } |
| |
| List<OFMessage> msgList = new ArrayList<OFMessage>(flowMods.size()); |
| msgList.addAll(flowMods); |
| |
| try { |
| sw.write(msgList, null); |
| } catch (IOException e) { |
| log.error("Error writing to switch", e); |
| } |
| } |
| |
| //TODO can the Prontos handle being sent all flow mods in one message? |
| public synchronized void switchConnected(IOFSwitch sw) { |
| log.debug("Switch connected: {}", sw); |
| |
| ensureCacheForSwitch(sw.getId()); |
| |
| List<OFFlowMod> flowMods = flowCache.get(sw.getId()); |
| |
| Collections.sort(flowMods, cookieComparator); |
| |
| sw.clearAllFlowMods(); |
| |
| List<OFMessage> messages = new ArrayList<OFMessage>(flowMods.size()); |
| messages.addAll(flowMods); |
| |
| try { |
| sw.write(messages, null); |
| } catch (IOException e) { |
| log.error("Failure writing flow mods to switch {}", |
| HexString.toHexString(sw.getId())); |
| } |
| } |
| |
| private void ensureCacheForSwitch(long dpid) { |
| if (!flowCache.containsKey(dpid)) { |
| flowCache.put(dpid, new ArrayList<OFFlowMod>()); |
| } |
| } |
| } |