HC2VPP-314 - fix for IPV6 routes with 128 subnet prefix

VPP uses byte in range of 0 to 255 but when jni is used
and this type is converted to java byte which has range
of -128 to 127 it will convert it to negative value.
It then fails to create Ip6Prefix from this value.

Change-Id: Ic18686959682c153da2e4ee4a7f7841c9b56e5d3
Signed-off-by: Michal Cmarada <michal.cmarada@pantheon.tech>

2 files changed, 2 insertions, 2 deletions

diff --git a/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/naming/Ipv6RouteNamesFactory.java b/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/naming/Ipv6RouteNamesFactory.java
index a58051b63..abb48618c 100644
--- a/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/naming/Ipv6RouteNamesFactory.java
+++ b/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/naming/Ipv6RouteNamesFactory.java
@@ -60,7 +60,7 @@ public final class Ipv6RouteNamesFactory implements RouteMapper {
     public String uniqueRouteName(@Nonnull final Ip6FibDetails details, @Nonnull final MappingContext mappingContext) {
         return bindName(routingProtocolContext.getName(details.tableId, mappingContext),
                 doubleDotlessAddress(details.address),
-                String.valueOf(details.addressLength));
+                String.valueOf(Byte.toUnsignedInt(details.addressLength)));
     }
 
     public String uniqueRouteHopName(
diff --git a/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/trait/RouteRequestProducer.java b/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/trait/RouteRequestProducer.java
index 80b4b8f79..97adb3589 100644
--- a/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/trait/RouteRequestProducer.java
+++ b/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/trait/RouteRequestProducer.java
@@ -63,7 +63,7 @@ public interface RouteRequestProducer extends ByteDataTranslator, AddressTransla
         checkArgument(
                 allowedPrefixPatterns.stream().anyMatch(pattern -> Pattern.compile(pattern).matcher(value).matches()),
                 "%s is not a valid Ip-prefix value");
-        return Byte.valueOf(value.substring(value.indexOf("/") + 1));
+        return Integer.valueOf(value.substring(value.indexOf("/") + 1)).byteValue();
     }
 
     default boolean classifyTablePresent(final String classifyTableName,