/** * Parse set_tp_src actions. * The key and delimiter for the action should be omitted, and only the * data should be presented to this decoder. A leading 0x is permitted. * * @param actionToDecode; The action as a string to decode * @param version; The OF version to create the action for * @param log * @return */ private static OFActionSetTpSrc decode_set_src_port(String actionToDecode, OFVersion version, Logger log) { Matcher n = Pattern.compile("((?:0x)?\\d+)").matcher(actionToDecode); if (n.matches()) { if (n.group(1) != null) { try { TransportPort portnum = TransportPort.of(get_int(n.group(1))); OFActionSetTpSrc.Builder ab = OFFactories.getFactory(version).actions().buildSetTpSrc(); ab.setTpPort(portnum); log.debug("action {}", ab.build()); return ab.build(); } catch (NumberFormatException e) { log.debug("Invalid src-port in: {} (error ignored)", actionToDecode); return null; } } } else { log.debug("Invalid action: '{}'", actionToDecode); return null; } return null; }
/** * Parse set_tp_src actions. * The key and delimiter for the action should be omitted, and only the * data should be presented to this decoder. A leading 0x is permitted. * * @param actionToDecode; The action as a string to decode * @param version; The OF version to create the action for * @param log * @return */ private static OFActionSetTpSrc decode_set_src_port(String actionToDecode, OFVersion version, Logger log) { Matcher n = Pattern.compile("((?:0x)?\\d+)").matcher(actionToDecode); if (n.matches()) { if (n.group(1) != null) { try { TransportPort portnum = TransportPort.of(get_short(n.group(1))); OFActionSetTpSrc.Builder ab = OFFactories.getFactory(version).actions().buildSetTpSrc(); ab.setTpPort(portnum); log.debug("action {}", ab.build()); return ab.build(); } catch (NumberFormatException e) { log.debug("Invalid src-port in: {} (error ignored)", actionToDecode); return null; } } } else { log.debug("Invalid action: '{}'", actionToDecode); return null; } return null; }
/** * Applies all applicable FlowMods from a list of given FlowMods to the given Ethernet packet. The wrapperMessage is necessary for FlowMods that match on the InPort. * * @param flowMods The list of flowmods to apply. * @param original The packet to apply them to. * @param wrapperMessage The PakcetIn message that caused this. Needed for FlowMods that match on the InPort. * @return The modified packet. */ public static Ethernet applyFlowMods(final List<OFFlowMod> flowMods, Ethernet original, OFPacketIn wrapperMessage) { OFFlowMod matchingFlowMod = getFirstMatchingFlowMod(flowMods, original, wrapperMessage); Ethernet modified = (Ethernet) original.clone(); List<OFFlowMod> appliedFlowMods = new ArrayList<>(); while (matchingFlowMod != null && !appliedFlowMods.contains(matchingFlowMod)) { modified = (Ethernet) modified.clone(); for (OFAction action : matchingFlowMod.getActions()) { if (action.getType() == OFActionType.SET_TP_SRC) { ((TCP) modified.getPayload().getPayload()).setSourcePort((short) ((OFActionSetTpSrc) action).getTpPort().getPort()); } else if (action.getType() == OFActionType.SET_TP_DST) { ((TCP) modified.getPayload().getPayload()).setDestinationPort((short) ((OFActionSetTpDst) action).getTpPort().getPort()); } // TODO support more actions } appliedFlowMods.add(matchingFlowMod); matchingFlowMod = getFirstMatchingFlowMod(flowMods, modified, wrapperMessage); } return modified; }
public FlowAlias(OFFlowMod flowmod){ this.ofm = flowmod; this.aliasList = new ArrayList<>(); this.fra = FlowRuleAction.DROP; this.lastConflictAlias = null; Match match = flowmod.getMatch(); Match.Builder mb = match.createBuilder(); List<OFAction> actions = flowmod.getActions(); //initialize alias with match filed Alias alias = new Alias(match); //add alias to list this.aliasList.add(alias); //update alias based on actions for (OFAction act : actions){ switch (act.getType()){ case SET_DL_SRC: OFActionSetDlSrc setDLSRC = (OFActionSetDlSrc)act; mb.setExact(MatchField.ETH_SRC, setDLSRC.getDlAddr()); break; case SET_DL_DST: OFActionSetDlDst setDLDST = (OFActionSetDlDst)act; mb.setExact(MatchField.ETH_DST, setDLDST.getDlAddr()); break; case SET_NW_SRC: OFActionSetNwSrc setNWSRC = (OFActionSetNwSrc)act; mb.setExact(MatchField.IPV4_SRC,setNWSRC.getNwAddr()); break; case SET_NW_DST: OFActionSetNwDst setNWDST = (OFActionSetNwDst)act; mb.setExact(MatchField.IPV4_DST,setNWDST.getNwAddr()); break; case SET_TP_SRC: OFActionSetTpSrc setTPSRC = (OFActionSetTpSrc)act; mb.setExact(MatchField.TCP_SRC, setTPSRC.getTpPort()); break; case SET_TP_DST: OFActionSetTpDst setTPDST = (OFActionSetTpDst)act; mb.setExact(MatchField.TCP_SRC, setTPDST.getTpPort()); break; case ENQUEUE: case OUTPUT: OFActionOutput output = (OFActionOutput)act; alias.setPort(output.getPort()); this.fra = FlowRuleAction.FORWARD; break; } } //save modified action alias.setMatch(mb.build()); //add updated alias to the list this.aliasList.add(alias); }