Minor fix P4 DPN communicator
diff --git a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/protocols/DpnP4Communicator.java b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/protocols/DpnP4Communicator.java
index 83afb22..b22f63f 100644
--- a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/protocols/DpnP4Communicator.java
+++ b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/protocols/DpnP4Communicator.java
@@ -59,6 +59,8 @@
 
     private final Logger log = LoggerFactory.getLogger(getClass());
 
+    private static String HDR = "hdr.";
+
     private static final PiTableId TBL_ID_UE_FILTER = PiTableId
             .of("spgw_ingress.ue_filter_table");
     private static final PiTableId TBL_ID_S1U_FILTER = PiTableId
@@ -67,9 +69,9 @@
             .of("spgw_ingress.dl_sess_lookup");
 
     private static final PiMatchFieldId MF_ID_IPV4_DST = PiMatchFieldId
-            .of("ipv4.dst_addr");
+            .of(HDR + "ipv4.dst_addr");
     private static final PiMatchFieldId MF_ID_GTPU_IPV4_DST = PiMatchFieldId
-            .of("gtpu_ipv4.dst_addr");
+            .of(HDR + "gtpu_ipv4.dst_addr");
 
     private static final PiActionId ACT_ID_SET_DL_SESS_INFO = PiActionId
             .of("spgw_ingress.set_dl_sess_info");
@@ -284,7 +286,7 @@
 
     private FlowRule ueFilterRule(Ip4Address ueAddr) {
         final PiCriterion piCriterion = PiCriterion.builder()
-                .matchExact(MF_ID_IPV4_DST, ueAddr.toOctets())
+                .matchLpm(MF_ID_IPV4_DST, ueAddr.toOctets(), 32)
                 .build();
 
         return flowRuleBuilder()
@@ -377,7 +379,5 @@
         final FlowRuleOperations.Builder opsBuilder = FlowRuleOperations.builder();
         rules.forEach(opsBuilder::remove);
         flowRuleService.apply(opsBuilder.build());
-
-
     }
 }