diff options
Diffstat (limited to 'vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AceIp4Writer.java')
-rw-r--r-- | vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AceIp4Writer.java | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AceIp4Writer.java b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AceIp4Writer.java new file mode 100644 index 000000000..0ae1315a8 --- /dev/null +++ b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AceIp4Writer.java @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2017 Cisco and/or its affiliates. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package io.fd.hc2vpp.vpp.classifier.write.acl.common; + +import static com.google.common.base.Preconditions.checkArgument; + +import com.google.common.annotations.VisibleForTesting; +import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession; +import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTable; +import java.util.ArrayList; +import java.util.List; +import javax.annotation.Nonnull; +import javax.annotation.Nullable; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.actions.PacketHandling; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.ace.type.AceIp; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.acl.access.list.entries.ace.matches.ace.type.ace.ip.ace.ip.version.AceIpv4; +import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.acl.rev161214.InterfaceMode; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +final class AceIp4Writer implements AceWriter<AceIp>, AclTranslator, Ip4AclTranslator { + + @VisibleForTesting + static final int MATCH_N_VECTORS = 3; // number of 16B vectors + private static final int TABLE_MASK_LENGTH = 48; + private static final Logger LOG = LoggerFactory.getLogger(AceIp4Writer.class); + + @Override + public ClassifyAddDelTable createTable(@Nonnull final AceIp aceIp, + @Nullable final InterfaceMode mode, + final int nextTableIndex, + final int vlanTags) { + checkArgument(aceIp.getAceIpVersion() instanceof AceIpv4, "Expected AceIpv4 version, but was %", aceIp); + final AceIpv4 ipVersion = (AceIpv4) aceIp.getAceIpVersion(); + + final int numberOfSessions = PortPair.fromRange(aceIp.getSourcePortRange(), aceIp.getDestinationPortRange()).size(); + final ClassifyAddDelTable request = createTable(nextTableIndex, numberOfSessions); + request.skipNVectors = 0; // match entire L2 and L3 header + request.matchNVectors = MATCH_N_VECTORS; + request.mask = new byte[TABLE_MASK_LENGTH]; + + final int baseOffset = getVlanTagsLen(vlanTags); + boolean aceIsEmpty = ip4Mask(baseOffset, mode, aceIp, ipVersion, request); + if (aceIsEmpty) { + throw new IllegalArgumentException( + String.format("Ace %s does not define packet field match values", aceIp.toString())); + } + + LOG.debug("ACE rule={} translated to table={}.", aceIp, request); + return request; + } + + @Override + public List<ClassifyAddDelSession> createSession(@Nonnull final PacketHandling action, + @Nonnull final AceIp aceIp, + @Nullable final InterfaceMode mode, + final int tableIndex, + final int vlanTags) { + checkArgument(aceIp.getAceIpVersion() instanceof AceIpv4, "Expected AceIpv4 version, but was %", aceIp); + final AceIpv4 ipVersion = (AceIpv4) aceIp.getAceIpVersion(); + + final List<PortPair> portPairs = PortPair.fromRange(aceIp.getSourcePortRange(), aceIp.getDestinationPortRange()); + final List<ClassifyAddDelSession> requests = new ArrayList<>(portPairs.size()); + for (final PortPair pair : portPairs) { + final ClassifyAddDelSession request = createSession(action, tableIndex); + request.match = new byte[TABLE_MASK_LENGTH]; + + final int baseOffset = getVlanTagsLen(vlanTags); + boolean noMatch = ip4Match(baseOffset, mode, aceIp, ipVersion, pair.getSrc(), pair.getDst(), request); + if (noMatch) { + throw new IllegalArgumentException( + String.format("Ace %s does not define packet field match values", aceIp.toString())); + } + + LOG.debug("ACE action={}, rule={} translated to session={}.", action, aceIp, request); + requests.add(request); + } + return requests; + } +} |