diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java
index 47ca9da..08a368d 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java
@@ -13,6 +13,7 @@
 import org.projectfloodlight.openflow.types.MacAddress;
 import org.projectfloodlight.openflow.types.OFMetadata;
 import org.projectfloodlight.openflow.types.OFPort;
+import org.projectfloodlight.openflow.types.OFPortMap;
 import org.projectfloodlight.openflow.types.OFValueType;
 import org.projectfloodlight.openflow.types.TransportPort;
 import org.projectfloodlight.openflow.types.U32;
@@ -170,6 +171,9 @@
             new MatchField<U8>("mpls_tc", MatchFields.MPLS_TC,
                     new Prerequisite<EthType>(MatchField.ETH_TYPE, EthType.MPLS_UNICAST, EthType.MPLS_MULTICAST));
 
+    public final static MatchField<OFPortMap> BSN_IN_PORTS_MASKED_128 =
+            new MatchField<OFPortMap>("bsn_in_port_masked_128", MatchFields.BSN_IN_PORTS_MASKED_128);
+
     public String getName() {
         return name;
     }
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java
index 7deb9af..c73530b 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java
@@ -37,5 +37,6 @@
     IPV6_ND_SLL,
     IPV6_ND_TLL,
     MPLS_LABEL,
-    MPLS_TC
+    MPLS_TC,
+    BSN_IN_PORTS_MASKED_128
 }
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFPortMap.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFPortMap.java
new file mode 100644
index 0000000..b666782
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFPortMap.java
@@ -0,0 +1,117 @@
+package org.projectfloodlight.openflow.types;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+
+public class OFPortMap implements OFValueType<OFPortMap> {
+
+    static final int LENGTH = 16;
+
+    private final long raw1;
+    private final long raw2;
+
+    public static final OFPortMap NONE = of(0, 0);
+
+    private OFPortMap(long raw1, long raw2) {
+        this.raw1 = raw1;
+        this.raw2 = raw2;
+
+    }
+
+    public static OFPortMap of(long raw1, long raw2) {
+        if (raw1 == 0 && raw2 == 0)
+            return NONE;
+        return new OFPortMap(raw1, raw2);
+    }
+
+    @Override
+    public int getLength() {
+        return LENGTH;
+    }
+
+    @Override
+    public OFPortMap applyMask(OFPortMap mask) {
+        return of(this.raw1 & mask.raw1, this.raw2 & mask.raw2);
+    }
+
+    public void write16Bytes(ChannelBuffer cb) {
+        cb.writeLong(raw1);
+        cb.writeLong(raw2);
+    }
+
+    public static OFPortMap read16Bytes(ChannelBuffer cb) {
+        long raw1 = cb.readLong();
+        long raw2 = cb.readLong();
+        return of(raw1, raw2);
+    }
+
+    private static boolean isBitOn(long raw1, long raw2, int bit) {
+        if (bit < 0 || bit >= 128)
+            throw new IndexOutOfBoundsException("Port number is out of bounds");
+        long word;
+        if (bit < 64) {
+            word = raw1;
+        } else {
+            word = raw2;
+            bit -= 64;
+        }
+        return (word & ((long)1 << bit)) != 0;
+    }
+
+    public boolean isOn(OFPort port) {
+        return isBitOn(raw1, raw2, port.getPortNumber());
+    }
+
+    public static OFPortMap ofPorts(OFPort... ports) {
+        Builder builder = new Builder();
+        for (OFPort port: ports) {
+            builder.set(port);
+        }
+        return builder.build();
+    }
+
+    @Override
+    public String toString() {
+        return (String.format("%64s", Long.toBinaryString(raw2)) + String.format("%64s", Long.toBinaryString(raw1))).replaceAll(" ", "0");
+    }
+
+    public static class Builder {
+        private long raw1, raw2;
+
+        public Builder() {
+
+        }
+
+        public boolean isOn(OFPort port) {
+            return isBitOn(raw1, raw2, port.getPortNumber());
+        }
+
+        public Builder set(OFPort port) {
+            int bit = port.getPortNumber();
+            if (bit < 0 || bit >= 128)
+                throw new IndexOutOfBoundsException("Port number is out of bounds");
+            if (bit < 64) {
+                raw1 |= ((long)1 << bit);
+            } else {
+                raw2 |= ((long)1 << (bit - 64));
+            }
+            return this;
+        }
+
+        public Builder unset(OFPort port) {
+            int bit = port.getPortNumber();
+            if (bit < 0 || bit >= 128)
+                throw new IndexOutOfBoundsException("Port number is out of bounds");
+            if (bit < 64) {
+                raw1 &= ~((long)1 << bit);
+            } else {
+                raw2 &= ~((long)1 << (bit - 64));
+            }
+            return this;
+        }
+
+        public OFPortMap build() {
+            return OFPortMap.of(raw1, raw2);
+        }
+    }
+
+}