HONEYCOMB-9: Add InterfaceCustomizer for ietf-interfaces

Add custom reader for if:/interfaces-state/if:interface with no
augmentations for now.

Change-Id: Icc0f403db204430f27ac96cf7b32e7800e11dacb
Signed-off-by: Stefan Kobza <skobza@cisco.com>
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

1 files changed, 149 insertions, 0 deletions

diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfacesstate/InterfaceUtils.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfacesstate/InterfaceUtils.java
new file mode 100644
index 000000000..d589c257f
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfacesstate/InterfaceUtils.java
@@ -0,0 +1,149 @@
+/*
+ * 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.v3po.translate.v3po.interfacesstate;
+
+import java.math.BigInteger;
+
+import javax.annotation.Nonnull;
+
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Gauge64;
+
+import com.google.common.base.Preconditions;
+import org.openvpp.vppjapi.vppApi;
+import org.openvpp.vppjapi.vppInterfaceDetails;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class InterfaceUtils {
+    private static final Logger LOG = LoggerFactory.getLogger(InterfaceUtils.class);
+
+    private static final Gauge64 vppLinkSpeed0 = new Gauge64(BigInteger.ZERO);
+    private static final Gauge64 vppLinkSpeed1 = new Gauge64(BigInteger.valueOf(10 * 1000000));
+    private static final Gauge64 vppLinkSpeed2 = new Gauge64(BigInteger.valueOf(100 * 1000000));
+    private static final Gauge64 vppLinkSpeed4 = new Gauge64(BigInteger.valueOf(1000 * 1000000));
+    private static final Gauge64 vppLinkSpeed8 = new Gauge64(BigInteger.valueOf(10000L * 1000000));
+    private static final Gauge64 vppLinkSpeed16 = new Gauge64(BigInteger.valueOf(40000L * 1000000));
+    private static final Gauge64 vppLinkSpeed32 = new Gauge64(BigInteger.valueOf(100000L * 1000000));
+
+    private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
+
+    /**
+     * Convert VPP's link speed bitmask to Yang type. 1 = 10M, 2 = 100M, 4 = 1G,
+     * 8 = 10G, 16 = 40G, 32 = 100G
+     *
+     * @param vppLinkSpeed Link speed in bitmask format from VPP.
+     * @return Converted value from VPP link speed
+     */
+    public static Gauge64 vppInterfaceSpeedToYang(byte vppLinkSpeed) {
+        switch (vppLinkSpeed) {
+            case 1:
+                return vppLinkSpeed1;
+            case 2:
+                return vppLinkSpeed2;
+            case 4:
+                return vppLinkSpeed4;
+            case 8:
+                return vppLinkSpeed8;
+            case 16:
+                return vppLinkSpeed16;
+            case 32:
+                return vppLinkSpeed32;
+            default:
+                return vppLinkSpeed0;
+        }
+    }
+
+    private static final void appendHexByte(final StringBuilder sb, final byte b) {
+        final int v = b & 0xFF;
+        sb.append(HEX_CHARS[v >>> 4]);
+        sb.append(HEX_CHARS[v & 15]);
+    }
+
+    /**
+     * Convert VPP's physical address stored byte array format to string as Yang
+     * dictates
+     * <p>
+     * Replace later with
+     * https://git.opendaylight.org/gerrit/#/c/34869/10/model/ietf/ietf-type-
+     * util/src/main/
+     * java/org/opendaylight/mdsal/model/ietf/util/AbstractIetfYangUtil.java
+     *
+     * @param vppPhysAddress byte array of bytes constructing the network IF physical
+     *                       address.
+     * @return String like "aa:bb:cc:dd:ee:ff"
+     */
+    public static String vppPhysAddrToYang(@Nonnull final byte[] vppPhysAddress) {
+        Preconditions.checkNotNull(vppPhysAddress, "Empty physicall address bytes");
+        Preconditions.checkArgument(vppPhysAddress.length == 6, "Invalid physical address size %s, expected 6",
+                vppPhysAddress.length);
+        StringBuilder physAddr = new StringBuilder();
+
+        appendHexByte(physAddr, vppPhysAddress[0]);
+        for (int i = 1; i < vppPhysAddress.length; i++) {
+            physAddr.append(":");
+            appendHexByte(physAddr, vppPhysAddress[i]);
+        }
+
+        return physAddr.toString();
+    }
+
+    /**
+     * VPP's interface index is counted from 0, whereas ietf-interface's
+     * if-index is from 1. This function converts from VPP's interface index to YANG's interface index.
+     *
+     * @param vppIfIndex the sw interface index VPP reported.
+     * @return VPP's interface index incremented by one
+     */
+    public static int vppIfIndexToYang(int vppIfIndex) {
+        return vppIfIndex + 1;
+    }
+
+    /**
+     * This function does the opposite of what {@link #vppIfIndexToYang(int)} does.
+     *
+     * @param yangIf if-index from ietf-interfaces.
+     * @return VPP's representation of the if-index
+     */
+    public static int YangIfIndexToVpp(int yangIfIndex) {
+        Preconditions.checkArgument(yangIfIndex >= 1, "YANG if-index has invalid value %s", yangIfIndex);
+        return yangIfIndex - 1;
+    }
+
+
+    public static vppInterfaceDetails[] getVppInterfaceDetails(final vppApi api,
+                                                             final boolean specificInterface,
+                                                             String interfaceName) {
+        if (interfaceName == null) {
+            interfaceName = new String();
+        }
+        vppInterfaceDetails[] ifaces = api.swInterfaceDump(
+                (byte) (specificInterface ? 1 : 0),
+                interfaceName.getBytes());
+        if (null == ifaces) {
+            LOG.warn("VPP returned null instead of interface by key {}", interfaceName);
+            return null;
+        }
+
+        if (1 != ifaces.length) {
+            LOG.error("Failed to extract interface {} details from VPP", interfaceName);
+        }
+
+        return ifaces;
+    }
+
+
+}