Use InetAddresses.forString instead of InetAddress.getByName

Unlike InetAddress.getByName(), Guava's InetAddresses.forString()
never cause DNS services to be accessed.
JDK equivalents whenever you are expecting
to handle only IP address string literals,
so there is no blocking DNS penalty for a malformed string.

See:
https://google.github.io/guava/releases/22.0/api/docs/com/google/common/net/InetAddresses.html#forString-java.lang.String-

Change-Id: I7972c09f1f0a3a2688021302acbf6df112be7f72
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

5 files changed, 17 insertions, 51 deletions

diff --git a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/util/EidTranslator.java b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/util/EidTranslator.java
index c8e868086..039aa1bf9 100755
--- a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/util/EidTranslator.java
+++ b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/util/EidTranslator.java
@@ -18,6 +18,7 @@ package io.fd.hc2vpp.lisp.translate.util;
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.net.InetAddresses.forString;
 import static io.fd.hc2vpp.lisp.translate.read.dump.executor.params.MappingsDumpParams.EidType;
 import static io.fd.hc2vpp.lisp.translate.read.dump.executor.params.MappingsDumpParams.EidType.IPV4;
 import static io.fd.hc2vpp.lisp.translate.read.dump.executor.params.MappingsDumpParams.EidType.IPV4_PREFIX;
@@ -25,12 +26,9 @@ import static io.fd.hc2vpp.lisp.translate.read.dump.executor.params.MappingsDump
 import static io.fd.hc2vpp.lisp.translate.read.dump.executor.params.MappingsDumpParams.EidType.IPV6_PREFIX;
 import static io.fd.hc2vpp.lisp.translate.read.dump.executor.params.MappingsDumpParams.EidType.MAC;
 import static java.lang.Integer.parseInt;
-import static java.lang.String.format;
 
 import inet.ipaddr.IPAddress;
 import io.fd.hc2vpp.common.translate.util.AddressTranslator;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
 import java.util.Arrays;
 import javax.annotation.Nonnull;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
@@ -200,7 +198,7 @@ public interface EidTranslator extends AddressTranslator, EidMetadataProvider {
 
     static String prefixValue(final String prefix, final String suffix) {
         // normalize prefix based address to prevent duplicates
-        IPAddress normalizedForm = IPAddress.from(getAddress(prefix)).toSubnet(parseInt(suffix));
+        IPAddress normalizedForm = IPAddress.from(forString(prefix)).toSubnet(parseInt(suffix));
 
         return normalizedForm.toCompressedString();
     }
@@ -601,9 +599,9 @@ public interface EidTranslator extends AddressTranslator, EidMetadataProvider {
         final String[] secondPrefixParts = getPrefixParts(secondPrefix);
 
         IPAddress firstAddress =
-                IPAddress.from(getAddress(firstPrefixParts[0])).toSubnet(parseInt(firstPrefixParts[1]));
+                IPAddress.from(forString(firstPrefixParts[0])).toSubnet(parseInt(firstPrefixParts[1]));
         IPAddress secondAddress =
-                IPAddress.from(getAddress(secondPrefixParts[0])).toSubnet(parseInt(secondPrefixParts[1]));
+                IPAddress.from(forString(secondPrefixParts[0])).toSubnet(parseInt(secondPrefixParts[1]));
 
         return firstAddress.compareTo(secondAddress) == 0;
     }
@@ -613,12 +611,4 @@ public interface EidTranslator extends AddressTranslator, EidMetadataProvider {
         checkArgument(split.length == 2, "%s is not a valid ip prefix", prefixString);
         return split;
     }
-
-    static InetAddress getAddress(final String value) {
-        try {
-            return InetAddress.getByName(value);
-        } catch (UnknownHostException e) {
-            throw new IllegalArgumentException(format("Unable to convert %s", value), e);
-        }
-    }
 }
diff --git a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/GreCustomizerTest.java b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/GreCustomizerTest.java
index 806da6858..fe0429b2b 100644
--- a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/GreCustomizerTest.java
+++ b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/GreCustomizerTest.java
@@ -26,6 +26,7 @@ import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
 import com.google.common.collect.Lists;
+import com.google.common.net.InetAddresses;
 import io.fd.hc2vpp.common.test.read.ReaderCustomizerTest;
 import io.fd.hc2vpp.common.translate.util.NamingContext;
 import io.fd.hc2vpp.v3po.interfacesstate.cache.InterfaceCacheDumpManager;
@@ -36,8 +37,6 @@ import io.fd.vpp.jvpp.core.dto.GreTunnelDetails;
 import io.fd.vpp.jvpp.core.dto.GreTunnelDetailsReplyDump;
 import io.fd.vpp.jvpp.core.dto.GreTunnelDump;
 import io.fd.vpp.jvpp.core.dto.SwInterfaceDetails;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
 import org.junit.Test;
 import org.mockito.Mock;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfacesState;
@@ -68,7 +67,7 @@ public class GreCustomizerTest extends ReaderCustomizerTest<Gre, GreBuilder> {
     }
 
     @Override
-    public void setUp() throws UnknownHostException, VppInvocationException, ReadFailedException {
+    public void setUp() throws VppInvocationException, ReadFailedException {
         interfacesContext = new NamingContext("gre-tunnel", IFC_CTX_NAME);
         defineMapping(mappingContext, IFACE_NAME, IFACE_ID, IFC_CTX_NAME);
 
@@ -80,8 +79,8 @@ public class GreCustomizerTest extends ReaderCustomizerTest<Gre, GreBuilder> {
         final GreTunnelDetailsReplyDump value = new GreTunnelDetailsReplyDump();
         final GreTunnelDetails greTunnelDetails = new GreTunnelDetails();
         greTunnelDetails.isIpv6 = 0;
-        greTunnelDetails.dstAddress = InetAddress.getByName("1.2.3.4").getAddress();
-        greTunnelDetails.srcAddress = InetAddress.getByName("1.2.3.5").getAddress();
+        greTunnelDetails.dstAddress = InetAddresses.forString("1.2.3.4").getAddress();
+        greTunnelDetails.srcAddress = InetAddresses.forString("1.2.3.5").getAddress();
         greTunnelDetails.outerFibId = 55;
         greTunnelDetails.swIfIndex = 0;
         value.greTunnelDetails = Lists.newArrayList(greTunnelDetails);
diff --git a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanCustomizerTest.java b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanCustomizerTest.java
index ba0cf2d2d..bfeb7eaa9 100644
--- a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanCustomizerTest.java
+++ b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanCustomizerTest.java
@@ -26,6 +26,7 @@ import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
 import com.google.common.collect.Lists;
+import com.google.common.net.InetAddresses;
 import io.fd.hc2vpp.common.test.read.ReaderCustomizerTest;
 import io.fd.hc2vpp.common.translate.util.NamingContext;
 import io.fd.hc2vpp.v3po.interfacesstate.cache.InterfaceCacheDumpManager;
@@ -36,8 +37,6 @@ import io.fd.vpp.jvpp.core.dto.SwInterfaceDetails;
 import io.fd.vpp.jvpp.core.dto.VxlanTunnelDetails;
 import io.fd.vpp.jvpp.core.dto.VxlanTunnelDetailsReplyDump;
 import io.fd.vpp.jvpp.core.dto.VxlanTunnelDump;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
 import org.junit.Test;
 import org.mockito.Mock;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfacesState;
@@ -69,7 +68,7 @@ public class VxlanCustomizerTest extends ReaderCustomizerTest<Vxlan, VxlanBuilde
     }
 
     @Override
-    public void setUp() throws UnknownHostException, VppInvocationException, ReadFailedException {
+    public void setUp() throws VppInvocationException, ReadFailedException {
         interfacesContext = new NamingContext("vxlan-tunnel", IFC_CTX_NAME);
         defineMapping(mappingContext, IF_NAME, IF_INDEX, IFC_CTX_NAME);
 
@@ -81,8 +80,8 @@ public class VxlanCustomizerTest extends ReaderCustomizerTest<Vxlan, VxlanBuilde
         final VxlanTunnelDetailsReplyDump value = new VxlanTunnelDetailsReplyDump();
         final VxlanTunnelDetails vxlanTunnelDetails = new VxlanTunnelDetails();
         vxlanTunnelDetails.isIpv6 = 0;
-        vxlanTunnelDetails.dstAddress = InetAddress.getByName("1.2.3.4").getAddress();
-        vxlanTunnelDetails.srcAddress = InetAddress.getByName("1.2.3.5").getAddress();
+        vxlanTunnelDetails.dstAddress = InetAddresses.forString("1.2.3.4").getAddress();
+        vxlanTunnelDetails.srcAddress = InetAddresses.forString("1.2.3.5").getAddress();
         vxlanTunnelDetails.encapVrfId = 55;
         vxlanTunnelDetails.swIfIndex = 0;
         vxlanTunnelDetails.vni = 9;
diff --git a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanGpeCustomizerTest.java b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanGpeCustomizerTest.java
index ce794302b..6eafa268d 100644
--- a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanGpeCustomizerTest.java
+++ b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfacesstate/VxlanGpeCustomizerTest.java
@@ -27,6 +27,7 @@ import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
 import com.google.common.collect.Lists;
+import com.google.common.net.InetAddresses;
 import io.fd.hc2vpp.common.test.read.ReaderCustomizerTest;
 import io.fd.hc2vpp.common.translate.util.NamingContext;
 import io.fd.hc2vpp.v3po.interfacesstate.cache.InterfaceCacheDumpManager;
@@ -37,8 +38,6 @@ import io.fd.vpp.jvpp.core.dto.SwInterfaceDetails;
 import io.fd.vpp.jvpp.core.dto.VxlanGpeTunnelDetails;
 import io.fd.vpp.jvpp.core.dto.VxlanGpeTunnelDetailsReplyDump;
 import io.fd.vpp.jvpp.core.dto.VxlanGpeTunnelDump;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
 import org.junit.Test;
 import org.mockito.Mock;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfacesState;
@@ -69,7 +68,7 @@ public class VxlanGpeCustomizerTest extends ReaderCustomizerTest<VxlanGpe, Vxlan
     }
 
     @Override
-    public void setUp() throws UnknownHostException, VppBaseCallException, ReadFailedException {
+    public void setUp() throws VppBaseCallException, ReadFailedException {
         interfacesContext = new NamingContext("vxlan_gpe_inf", IFC_CTX_NAME);
         defineMapping(mappingContext, IF_NAME, IF_INDEX, IFC_CTX_NAME);
 
@@ -81,8 +80,8 @@ public class VxlanGpeCustomizerTest extends ReaderCustomizerTest<VxlanGpe, Vxlan
         final VxlanGpeTunnelDetailsReplyDump value = new VxlanGpeTunnelDetailsReplyDump();
         final VxlanGpeTunnelDetails vxlanGpeTunnelDetails = new VxlanGpeTunnelDetails();
         vxlanGpeTunnelDetails.isIpv6 = 0;
-        vxlanGpeTunnelDetails.local = InetAddress.getByName("1.2.3.4").getAddress();
-        vxlanGpeTunnelDetails.remote = InetAddress.getByName("1.2.3.5").getAddress();
+        vxlanGpeTunnelDetails.local = InetAddresses.forString("1.2.3.4").getAddress();
+        vxlanGpeTunnelDetails.remote = InetAddresses.forString("1.2.3.5").getAddress();
         vxlanGpeTunnelDetails.vni = 9;
         vxlanGpeTunnelDetails.protocol = 1;
         vxlanGpeTunnelDetails.encapVrfId = 55;
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv6Translator.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv6Translator.java
index d2f046302..6a71d6af2 100644
--- a/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv6Translator.java
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv6Translator.java
@@ -43,17 +43,7 @@ public interface Ipv6Translator extends ByteDataTranslator {
      * @return byte array with address bytes
      */
     default byte[] ipv6AddressNoZoneToArray(@Nonnull final Ipv6Address address) {
-        return Impl.ipv6AddressNoZoneToArray(address.getValue());
-    }
-
-    /**
-     * Transform Ipv6 address to a byte array acceptable by VPP. VPP expects incoming byte array to be in the same order
-     * as the address.
-     *
-     * @return byte array with address bytes
-     */
-    default byte[] ipv6AddressNoZoneToArray(@Nonnull final Ipv6AddressNoZone ipv6Addr) {
-        return Impl.ipv6AddressNoZoneToArray(ipv6Addr.getValue());
+        return InetAddresses.forString(address.getValue()).getAddress();
     }
 
     /**
@@ -138,15 +128,4 @@ public interface Ipv6Translator extends ByteDataTranslator {
                     "Cannot create prefix for address[" + Arrays.toString(address) + "],prefix[" + prefix + "]", e);
         }
     }
-
-    class Impl {
-        private static byte[] ipv6AddressNoZoneToArray(@Nonnull final String address){
-            try {
-                // No lookup performed for literal ipv6 addresses
-                return InetAddress.getByName(address).getAddress();
-            } catch (UnknownHostException e) {
-                throw new IllegalArgumentException("Invalid address supplied", e);
-            }
-        }
-    }
 }