diff options
author | Jan Srnicek <jsrnicek@cisco.com> | 2017-03-08 14:01:34 +0100 |
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committer | Marek Gradzki <mgradzki@cisco.com> | 2017-03-09 07:09:36 +0000 |
commit | bf1d5db448edc1ae352960f14bca9ccb41612186 (patch) | |
tree | cdf6f5feebf650050bde23ffe7a9a2f8d6389a94 /vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AclTranslator.java | |
parent | 6532b1524bb841cac2b559415b85ac6e9d2ff934 (diff) |
HC2VPP-7 - split vpp-classifiers to separate module
Split vpp-classifiers and vpp-classifiers acls' to separate modules.
Contains TODO's for future change of dependencies
Change-Id: I94f92ce2ec8960c67bd406f085f2fe928079ee23
Signed-off-by: Jan Srnicek <jsrnicek@cisco.com>
Diffstat (limited to 'vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AclTranslator.java')
-rw-r--r-- | vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AclTranslator.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AclTranslator.java b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AclTranslator.java new file mode 100644 index 000000000..e75d0af24 --- /dev/null +++ b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/acl/common/AclTranslator.java @@ -0,0 +1,74 @@ +/* + * 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 io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession; +import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTable; +import javax.annotation.Nonnegative; +import javax.annotation.Nonnull; +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.actions.packet.handling.Permit; + +/** + * Utility that helps translating of ietf-acl model ACEs to VPP's classify tables and sessions. + */ +interface AclTranslator { + int TABLE_MEM_SIZE = 8 * 1024; + int VLAN_TAG_LEN = 4; + + default ClassifyAddDelTable createTable(final int nextTableIndex) { + return createTable(nextTableIndex, 1); + } + + default ClassifyAddDelTable createTable(final int nextTableIndex, @Nonnegative final int numberOfSessions) { + final ClassifyAddDelTable request = new ClassifyAddDelTable(); + request.isAdd = 1; + request.tableIndex = -1; // value not present + request.nbuckets = numberOfSessions; + request.nextTableIndex = nextTableIndex; + + + // TODO: HONEYCOMB-181 minimise memory used by classify tables (we create a lot of them to make ietf-acl model + // mapping more convenient): + // according to https://wiki.fd.io/view/VPP/Introduction_To_N-tuple_Classifiers#Creating_a_classifier_table, + // classify table needs 16*(1 + match_n_vectors) bytes, but this does not quite work, + // so setting 8K +1k*numberOfSessions for now + checkArgument(numberOfSessions>0, "negative numberOfSessions %s", numberOfSessions); + request.memorySize = TABLE_MEM_SIZE+1024*(numberOfSessions-1); + request.missNextIndex = -1; // value not set, but anyway it is ignored for tables in chain + return request; + } + + default ClassifyAddDelSession createSession(@Nonnull final PacketHandling action, final int tableIndex) { + final ClassifyAddDelSession request = new ClassifyAddDelSession(); + request.isAdd = 1; + request.tableIndex = tableIndex; + request.opaqueIndex = ~0; // value not used + + if (action instanceof Permit) { + request.hitNextIndex = -1; + } // deny (0) is default value + + return request; + } + + default int getVlanTagsLen(final int vlanTags) { + return vlanTags * VLAN_TAG_LEN; + } +} |