1 files changed, 227 insertions, 0 deletions
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/acl/ingress/AceIp6Writer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/acl/ingress/AceIp6Writer.java
new file mode 100644
index 000000000..94c12e536
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/acl/ingress/AceIp6Writer.java
@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2016 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.honeycomb.translate.v3po.interfaces.acl.ingress;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import com.google.common.annotations.VisibleForTesting;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.BitSet;
+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.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.AceIpv6;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
+import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession;
+import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTable;
+import io.fd.vpp.jvpp.core.dto.InputAclSetInterface;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final class AceIp6Writer extends AbstractAceWriter<AceIp> {
+
+    @VisibleForTesting
+    static final int MATCH_N_VECTORS = 4; // number of 16B vectors
+    private static final Logger LOG = LoggerFactory.getLogger(AceIp6Writer.class);
+    private static final int TABLE_MASK_LENGTH = 64;
+    private static final int IP6_MASK_BIT_LENGTH = 128;
+
+    private static final int IP_VERSION_OFFSET = 14; // first 14 bytes represent L2 header (2x6 + etherType(2))
+    private static final int IP_VERSION_MASK = 0xf0;
+    private static final int DSCP_MASK1 = 0x0f;
+    private static final int DSCP_MASK2 = 0xc0;
+    private static final int IP6_LEN = 16;
+    private static final int SRC_IP_OFFSET = IP_VERSION_OFFSET + 8;
+    private static final int DST_IP_OFFSET = SRC_IP_OFFSET + IP6_LEN;
+
+    public AceIp6Writer(@Nonnull final FutureJVppCore futureJVppCore) {
+        super(futureJVppCore);
+    }
+
+    private static byte[] toByteMask(final int prefixLength) {
+        final BitSet mask = new BitSet(IP6_MASK_BIT_LENGTH);
+        mask.set(0, prefixLength, true);
+        if (prefixLength < IP6_MASK_BIT_LENGTH) {
+            mask.set(prefixLength, IP6_MASK_BIT_LENGTH, false);
+        }
+        return mask.toByteArray();
+    }
+
+    private static byte[] toByteMask(final Ipv6Prefix ipv6Prefix) {
+        final int prefixLength = Short.valueOf(ipv6Prefix.getValue().split("/")[1]);
+        return toByteMask(prefixLength);
+    }
+
+    private static byte[] toMatchValue(final Ipv6Prefix ipv6Prefix) {
+        final String[] split = ipv6Prefix.getValue().split("/");
+        final byte[] addressBytes;
+        try {
+            addressBytes = InetAddress.getByName(split[0]).getAddress();
+        } catch (UnknownHostException e) {
+            throw new IllegalArgumentException("Invalid IP6 address", e);
+        }
+        final byte[] mask = toByteMask(Short.valueOf(split[1]));
+        int pos = 0;
+        for (; pos < mask.length; ++pos) {
+            addressBytes[pos] &= mask[pos];
+        }
+        // mask can be shorter that address, so we need to clear rest of the address:
+        for (; pos < addressBytes.length; ++pos) {
+            addressBytes[pos] = 0;
+        }
+        return addressBytes;
+    }
+
+    @Override
+    public ClassifyAddDelTable createClassifyTable(@Nonnull final PacketHandling action,
+                                                   @Nonnull final AceIp aceIp,
+                                                   final int nextTableIndex,
+                                                   final int vlanTags) {
+        checkArgument(aceIp.getAceIpVersion() instanceof AceIpv6, "Expected AceIpv6 version, but was %", aceIp);
+        final AceIpv6 ipVersion = (AceIpv6) aceIp.getAceIpVersion();
+
+        final ClassifyAddDelTable request = createClassifyTable(action, nextTableIndex);
+        request.skipNVectors = 0; // match entire L2 and L3 header
+        request.matchNVectors = MATCH_N_VECTORS;
+
+        boolean aceIsEmpty = true;
+        request.mask = new byte[TABLE_MASK_LENGTH];
+
+        final int baseOffset = getVlanTagsLen(vlanTags);
+
+        if (aceIp.getProtocol() != null) {
+            aceIsEmpty = false;
+            request.mask[baseOffset + IP_VERSION_OFFSET] |= IP_VERSION_MASK;
+        }
+
+        if (aceIp.getDscp() != null) {
+            aceIsEmpty = false;
+            // DCSP (bits 4-9 of IP6 header)
+            request.mask[baseOffset + IP_VERSION_OFFSET] |= DSCP_MASK1;
+            request.mask[baseOffset + IP_VERSION_OFFSET + 1] |= DSCP_MASK2;
+        }
+
+        if (aceIp.getSourcePortRange() != null) {
+            LOG.warn("L4 Header fields are not supported. Ignoring {}", aceIp.getSourcePortRange());
+        }
+
+        if (aceIp.getDestinationPortRange() != null) {
+            LOG.warn("L4 Header fields are not supported. Ignoring {}", aceIp.getDestinationPortRange());
+        }
+
+        if (ipVersion.getFlowLabel() != null) {
+            aceIsEmpty = false;
+            // bits 12-31
+            request.mask[baseOffset + IP_VERSION_OFFSET + 1] |= (byte) 0x0f;
+            request.mask[baseOffset + IP_VERSION_OFFSET + 2] = (byte) 0xff;
+            request.mask[baseOffset + IP_VERSION_OFFSET + 3] = (byte) 0xff;
+        }
+
+        if (ipVersion.getSourceIpv6Network() != null) {
+            aceIsEmpty = false;
+            final byte[] mask = toByteMask(ipVersion.getSourceIpv6Network());
+            System.arraycopy(mask, 0, request.mask, baseOffset + SRC_IP_OFFSET, mask.length);
+        }
+
+        if (ipVersion.getDestinationIpv6Network() != null) {
+            aceIsEmpty = false;
+            final byte[] mask = toByteMask(ipVersion.getDestinationIpv6Network());
+            System.arraycopy(mask, 0, request.mask, baseOffset + DST_IP_OFFSET, mask.length);
+        }
+
+        if (aceIsEmpty) {
+            throw new IllegalArgumentException(
+                String.format("Ace %s does not define packet field match values", aceIp.toString()));
+        }
+
+        LOG.debug("ACE action={}, rule={} translated to table={}.", action, aceIp, request);
+        return request;
+    }
+
+    @Override
+    public ClassifyAddDelSession createClassifySession(@Nonnull final PacketHandling action,
+                                                       @Nonnull final AceIp aceIp,
+                                                       final int tableIndex,
+                                                       final int vlanTags) {
+        checkArgument(aceIp.getAceIpVersion() instanceof AceIpv6, "Expected AceIpv6 version, but was %", aceIp);
+        final AceIpv6 ipVersion = (AceIpv6) aceIp.getAceIpVersion();
+
+        final ClassifyAddDelSession request = createClassifySession(action, tableIndex);
+        request.match = new byte[TABLE_MASK_LENGTH];
+        boolean noMatch = true;
+
+        final int baseOffset = getVlanTagsLen(vlanTags);
+
+        if (aceIp.getProtocol() != null) {
+            noMatch = false;
+            request.match[baseOffset + IP_VERSION_OFFSET] |=
+                (byte) (IP_VERSION_MASK & (aceIp.getProtocol().intValue() << 4));
+        }
+
+        if (aceIp.getDscp() != null) {
+            noMatch = false;
+            final int dscp = aceIp.getDscp().getValue();
+            // set bits 4-9 of IP6 header:
+            request.match[baseOffset + IP_VERSION_OFFSET] |= (byte) (DSCP_MASK1 & (dscp >> 2));
+            request.match[baseOffset + IP_VERSION_OFFSET + 1] |= (byte) (DSCP_MASK2 & (dscp << 6));
+        }
+
+        if (aceIp.getSourcePortRange() != null) {
+            LOG.warn("L4 Header fields are not supported. Ignoring {}", aceIp.getSourcePortRange());
+        }
+
+        if (aceIp.getDestinationPortRange() != null) {
+            LOG.warn("L4 Header fields are not supported. Ignoring {}", aceIp.getDestinationPortRange());
+        }
+
+        if (ipVersion.getFlowLabel() != null) {
+            noMatch = false;
+            final int flowLabel = ipVersion.getFlowLabel().getValue().intValue();
+            // bits 12-31
+            request.match[baseOffset + IP_VERSION_OFFSET + 1] |= (byte) (0x0f & (flowLabel >> 16));
+            request.match[baseOffset + IP_VERSION_OFFSET + 2] = (byte) (0xff & (flowLabel >> 8));
+            request.match[baseOffset + IP_VERSION_OFFSET + 3] = (byte) (0xff & flowLabel);
+        }
+
+        if (ipVersion.getSourceIpv6Network() != null) {
+            noMatch = false;
+            final byte[] match = toMatchValue(ipVersion.getSourceIpv6Network());
+            System.arraycopy(match, 0, request.match, baseOffset + SRC_IP_OFFSET, IP6_LEN);
+        }
+
+        if (ipVersion.getDestinationIpv6Network() != null) {
+            noMatch = false;
+            final byte[] match = toMatchValue(ipVersion.getDestinationIpv6Network());
+            System.arraycopy(match, 0, request.match, baseOffset + DST_IP_OFFSET, IP6_LEN);
+        }
+
+        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);
+        return request;
+    }
+
+    @Override
+    protected void setClassifyTable(@Nonnull final InputAclSetInterface request, final int tableIndex) {
+        request.ip6TableIndex = tableIndex;
+    }
+}