diff --git a/java_gen/pre-written/src/main/java/org/openflow/types/IpProtocol.java b/java_gen/pre-written/src/main/java/org/openflow/types/IpProtocol.java
index a295cb2..fc28370 100644
--- a/java_gen/pre-written/src/main/java/org/openflow/types/IpProtocol.java
+++ b/java_gen/pre-written/src/main/java/org/openflow/types/IpProtocol.java
@@ -1,5 +1,662 @@
 package org.openflow.types;
 
-public class IpProtocol {
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.openflow.exceptions.OFParseError;
+
+/**
+ * IP-Protocol field representation
+ * 
+ * @author Yotam Harchol (yotam.harchol@bigswitch.com)
+ */
+public class IpProtocol implements OFValueType {
+
+    static final short MAX_PROTO = 0xFF;
+    static final int LENGTH = 1;
+
+    private final short proto;
+
+    static final short IP_PROTO_NUM_HOPOPT  = 0x00;
+    static final short IP_PROTO_NUM_ICMP    = 0x01;
+    static final short IP_PROTO_NUM_IGMP    = 0x02;
+    static final short IP_PROTO_NUM_GGP = 0x03;
+    static final short IP_PROTO_NUM_IPv4    = 0x04;
+    static final short IP_PROTO_NUM_ST  = 0x05;
+    static final short IP_PROTO_NUM_TCP = 0x06;
+    static final short IP_PROTO_NUM_CBT = 0x07;
+    static final short IP_PROTO_NUM_EGP = 0x08;
+    static final short IP_PROTO_NUM_IGP = 0x09;
+    static final short IP_PROTO_NUM_BBN_RCC_MON = 0x0A;
+    static final short IP_PROTO_NUM_NVP_II  = 0x0B;
+    static final short IP_PROTO_NUM_PUP = 0x0C;
+    static final short IP_PROTO_NUM_ARGUS   = 0x0D;
+    static final short IP_PROTO_NUM_EMCON   = 0x0E;
+    static final short IP_PROTO_NUM_XNET    = 0x0F;
+    static final short IP_PROTO_NUM_CHAOS   = 0x10;
+    static final short IP_PROTO_NUM_UDP = 0x11;
+    static final short IP_PROTO_NUM_MUX = 0x12;
+    static final short IP_PROTO_NUM_DCN_MEAS    = 0x13;
+    static final short IP_PROTO_NUM_HMP = 0x14;
+    static final short IP_PROTO_NUM_PRM = 0x15;
+    static final short IP_PROTO_NUM_XNS_IDP = 0x16;
+    static final short IP_PROTO_NUM_TRUNK_1 = 0x17;
+    static final short IP_PROTO_NUM_TRUNK_2 = 0x18;
+    static final short IP_PROTO_NUM_LEAF_1  = 0x19;
+    static final short IP_PROTO_NUM_LEAF_2  = 0x1A;
+    static final short IP_PROTO_NUM_RDP = 0x1B;
+    static final short IP_PROTO_NUM_IRTP    = 0x1C;
+    static final short IP_PROTO_NUM_ISO_TP4 = 0x1D;
+    static final short IP_PROTO_NUM_NETBLT  = 0x1E;
+    static final short IP_PROTO_NUM_MFE_NSP = 0x1F;
+    static final short IP_PROTO_NUM_MERIT_INP   = 0x20;
+    static final short IP_PROTO_NUM_DCCP    = 0x21;
+    static final short IP_PROTO_NUM_3PC = 0x22;
+    static final short IP_PROTO_NUM_IDPR    = 0x23;
+    static final short IP_PROTO_NUM_XTP = 0x24;
+    static final short IP_PROTO_NUM_DDP = 0x25;
+    static final short IP_PROTO_NUM_IDPR_CMTP   = 0x26;
+    static final short IP_PROTO_NUM_TP_PP   = 0x27;
+    static final short IP_PROTO_NUM_IL  = 0x28;
+    static final short IP_PROTO_NUM_IPv6    = 0x29;
+    static final short IP_PROTO_NUM_SDRP    = 0x2A;
+    static final short IP_PROTO_NUM_IPv6_ROUTE  = 0x2B;
+    static final short IP_PROTO_NUM_IPv6_FRAG   = 0x2C;
+    static final short IP_PROTO_NUM_IDRP    = 0x2D;
+    static final short IP_PROTO_NUM_RSVP    = 0x2E;
+    static final short IP_PROTO_NUM_GRE = 0x2F;
+    static final short IP_PROTO_NUM_MHRP    = 0x30;
+    static final short IP_PROTO_NUM_BNA = 0x31;
+    static final short IP_PROTO_NUM_ESP = 0x32;
+    static final short IP_PROTO_NUM_AH  = 0x33;
+    static final short IP_PROTO_NUM_I_NLSP  = 0x34;
+    static final short IP_PROTO_NUM_SWIPE   = 0x35;
+    static final short IP_PROTO_NUM_NARP    = 0x36;
+    static final short IP_PROTO_NUM_MOBILE  = 0x37;
+    static final short IP_PROTO_NUM_TLSP    = 0x38;
+    static final short IP_PROTO_NUM_SKIP    = 0x39;
+    static final short IP_PROTO_NUM_IPv6_ICMP   = 0x3A;
+    static final short IP_PROTO_NUM_IPv6_NO_NXT = 0x3B;
+    static final short IP_PROTO_NUM_IPv6_OPTS   = 0x3C;
+    static final short IP_PROTO_NUM_HOST_INTERNAL   = 0x3D;
+    static final short IP_PROTO_NUM_CFTP    = 0x3E;
+    static final short IP_PROTO_NUM_LOCAL_NET   = 0x3F;
+    static final short IP_PROTO_NUM_SAT_EXPAK   = 0x40;
+    static final short IP_PROTO_NUM_KRYPTOLAN   = 0x41;
+    static final short IP_PROTO_NUM_RVD = 0x42;
+    static final short IP_PROTO_NUM_IPPC    = 0x43;
+    static final short IP_PROTO_NUM_DIST_FS = 0x44;
+    static final short IP_PROTO_NUM_SAT_MON = 0x45;
+    static final short IP_PROTO_NUM_VISA    = 0x46;
+    static final short IP_PROTO_NUM_IPCV    = 0x47;
+    static final short IP_PROTO_NUM_CPNX    = 0x48;
+    static final short IP_PROTO_NUM_CPHB    = 0x49;
+    static final short IP_PROTO_NUM_WSN = 0x4A;
+    static final short IP_PROTO_NUM_PVP = 0x4B;
+    static final short IP_PROTO_NUM_BR_SAT_MON  = 0x4C;
+    static final short IP_PROTO_NUM_SUN_ND  = 0x4D;
+    static final short IP_PROTO_NUM_WB_MON  = 0x4E;
+    static final short IP_PROTO_NUM_WB_EXPAK    = 0x4F;
+    static final short IP_PROTO_NUM_ISO_IP  = 0x50;
+    static final short IP_PROTO_NUM_VMTP    = 0x51;
+    static final short IP_PROTO_NUM_SECURE_VMTP = 0x52;
+    static final short IP_PROTO_NUM_VINES   = 0x53;
+    static final short IP_PROTO_NUM_TTP_IPTM = 0x54;
+    static final short IP_PROTO_NUM_NSFNET_IGP  = 0x55;
+    static final short IP_PROTO_NUM_DGP = 0x56;
+    static final short IP_PROTO_NUM_TCF = 0x57;
+    static final short IP_PROTO_NUM_EIGRP   = 0x58;
+    static final short IP_PROTO_NUM_OSPF    = 0x59;
+    static final short IP_PROTO_NUM_Sprite_RPC  = 0x5A;
+    static final short IP_PROTO_NUM_LARP    = 0x5B;
+    static final short IP_PROTO_NUM_MTP = 0x5C;
+    static final short IP_PROTO_NUM_AX_25   = 0x5D;
+    static final short IP_PROTO_NUM_IPIP    = 0x5E;
+    static final short IP_PROTO_NUM_MICP    = 0x5F;
+    static final short IP_PROTO_NUM_SCC_SP  = 0x60;
+    static final short IP_PROTO_NUM_ETHERIP = 0x61;
+    static final short IP_PROTO_NUM_ENCAP   = 0x62;
+    static final short IP_PROTO_NUM_PRIVATE_ENCRYPT = 0x63;
+    static final short IP_PROTO_NUM_GMTP    = 0x64;
+    static final short IP_PROTO_NUM_IFMP    = 0x65;
+    static final short IP_PROTO_NUM_PNNI    = 0x66;
+    static final short IP_PROTO_NUM_PIM = 0x67;
+    static final short IP_PROTO_NUM_ARIS    = 0x68;
+    static final short IP_PROTO_NUM_SCPS    = 0x69;
+    static final short IP_PROTO_NUM_QNX = 0x6A;
+    static final short IP_PROTO_NUM_A_N = 0x6B;
+    static final short IP_PROTO_NUM_IP_COMP = 0x6C;
+    static final short IP_PROTO_NUM_SNP = 0x6D;
+    static final short IP_PROTO_NUM_COMPAQ_PEER = 0x6E;
+    static final short IP_PROTO_NUM_IPX_IN_IP   = 0x6F;
+    static final short IP_PROTO_NUM_VRRP    = 0x70;
+    static final short IP_PROTO_NUM_PGM = 0x71;
+    static final short IP_PROTO_NUM_ZERO_HOP    = 0x72;
+    static final short IP_PROTO_NUM_L2TP    = 0x73;
+    static final short IP_PROTO_NUM_DDX = 0x74;
+    static final short IP_PROTO_NUM_IATP    = 0x75;
+    static final short IP_PROTO_NUM_STP = 0x76;
+    static final short IP_PROTO_NUM_SRP = 0x77;
+    static final short IP_PROTO_NUM_UTI = 0x78;
+    static final short IP_PROTO_NUM_SMP = 0x79;
+    static final short IP_PROTO_NUM_SM  = 0x7A;
+    static final short IP_PROTO_NUM_PTP = 0x7B;
+    static final short IP_PROTO_NUM_IS_IS_OVER_IPv4 = 0x7C;
+    static final short IP_PROTO_NUM_FIRE    = 0x7D;
+    static final short IP_PROTO_NUM_CRTP    = 0x7E;
+    static final short IP_PROTO_NUM_CRUDP   = 0x7F;
+    static final short IP_PROTO_NUM_SSCOPMCE    = 0x80;
+    static final short IP_PROTO_NUM_IPLT    = 0x81;
+    static final short IP_PROTO_NUM_SPS = 0x82;
+    static final short IP_PROTO_NUM_PIPE    = 0x83;
+    static final short IP_PROTO_NUM_SCTP    = 0x84;
+    static final short IP_PROTO_NUM_FC  = 0x85;
+    static final short IP_PROTO_NUM_RSVP_E2E_IGNORE = 0x86;
+    static final short IP_PROTO_NUM_MOBILITY_HEADER = 0x87;
+    static final short IP_PROTO_NUM_UDP_LITE    = 0x88;
+    static final short IP_PROTO_NUM_MPLS_IN_IP  = 0x89;
+    static final short IP_PROTO_NUM_MANET   = 0x8A;
+    static final short IP_PROTO_NUM_HIP = 0x8B;
+    static final short IP_PROTO_NUM_SHIM6   = 0x8C;
+
+    public static final IpProtocol IP_PROTO_HOPOPT = new IpProtocol(IP_PROTO_NUM_HOPOPT);
+    public static final IpProtocol IP_PROTO_ICMP = new IpProtocol(IP_PROTO_NUM_ICMP);
+    public static final IpProtocol IP_PROTO_IGMP = new IpProtocol(IP_PROTO_NUM_IGMP);
+    public static final IpProtocol IP_PROTO_GGP = new IpProtocol(IP_PROTO_NUM_GGP);
+    public static final IpProtocol IP_PROTO_IPv4 = new IpProtocol(IP_PROTO_NUM_IPv4);
+    public static final IpProtocol IP_PROTO_ST = new IpProtocol(IP_PROTO_NUM_ST);
+    public static final IpProtocol IP_PROTO_TCP = new IpProtocol(IP_PROTO_NUM_TCP);
+    public static final IpProtocol IP_PROTO_CBT = new IpProtocol(IP_PROTO_NUM_CBT);
+    public static final IpProtocol IP_PROTO_EGP = new IpProtocol(IP_PROTO_NUM_EGP);
+    public static final IpProtocol IP_PROTO_IGP = new IpProtocol(IP_PROTO_NUM_IGP);
+    public static final IpProtocol IP_PROTO_BBN_RCC_MON = new IpProtocol(IP_PROTO_NUM_BBN_RCC_MON);
+    public static final IpProtocol IP_PROTO_NVP_II = new IpProtocol(IP_PROTO_NUM_NVP_II);
+    public static final IpProtocol IP_PROTO_PUP = new IpProtocol(IP_PROTO_NUM_PUP);
+    public static final IpProtocol IP_PROTO_ARGUS = new IpProtocol(IP_PROTO_NUM_ARGUS);
+    public static final IpProtocol IP_PROTO_EMCON = new IpProtocol(IP_PROTO_NUM_EMCON);
+    public static final IpProtocol IP_PROTO_XNET = new IpProtocol(IP_PROTO_NUM_XNET);
+    public static final IpProtocol IP_PROTO_CHAOS = new IpProtocol(IP_PROTO_NUM_CHAOS);
+    public static final IpProtocol IP_PROTO_UDP = new IpProtocol(IP_PROTO_NUM_UDP);
+    public static final IpProtocol IP_PROTO_MUX = new IpProtocol(IP_PROTO_NUM_MUX);
+    public static final IpProtocol IP_PROTO_DCN_MEAS = new IpProtocol(IP_PROTO_NUM_DCN_MEAS);
+    public static final IpProtocol IP_PROTO_HMP = new IpProtocol(IP_PROTO_NUM_HMP);
+    public static final IpProtocol IP_PROTO_PRM = new IpProtocol(IP_PROTO_NUM_PRM);
+    public static final IpProtocol IP_PROTO_XNS_IDP = new IpProtocol(IP_PROTO_NUM_XNS_IDP);
+    public static final IpProtocol IP_PROTO_TRUNK_1 = new IpProtocol(IP_PROTO_NUM_TRUNK_1);
+    public static final IpProtocol IP_PROTO_TRUNK_2 = new IpProtocol(IP_PROTO_NUM_TRUNK_2);
+    public static final IpProtocol IP_PROTO_LEAF_1 = new IpProtocol(IP_PROTO_NUM_LEAF_1);
+    public static final IpProtocol IP_PROTO_LEAF_2 = new IpProtocol(IP_PROTO_NUM_LEAF_2);
+    public static final IpProtocol IP_PROTO_RDP = new IpProtocol(IP_PROTO_NUM_RDP);
+    public static final IpProtocol IP_PROTO_IRTP = new IpProtocol(IP_PROTO_NUM_IRTP);
+    public static final IpProtocol IP_PROTO_ISO_TP4 = new IpProtocol(IP_PROTO_NUM_ISO_TP4);
+    public static final IpProtocol IP_PROTO_NETBLT = new IpProtocol(IP_PROTO_NUM_NETBLT);
+    public static final IpProtocol IP_PROTO_MFE_NSP = new IpProtocol(IP_PROTO_NUM_MFE_NSP);
+    public static final IpProtocol IP_PROTO_MERIT_INP = new IpProtocol(IP_PROTO_NUM_MERIT_INP);
+    public static final IpProtocol IP_PROTO_DCCP = new IpProtocol(IP_PROTO_NUM_DCCP);
+    public static final IpProtocol IP_PROTO_3PC = new IpProtocol(IP_PROTO_NUM_3PC);
+    public static final IpProtocol IP_PROTO_IDPR = new IpProtocol(IP_PROTO_NUM_IDPR);
+    public static final IpProtocol IP_PROTO_XTP = new IpProtocol(IP_PROTO_NUM_XTP);
+    public static final IpProtocol IP_PROTO_DDP = new IpProtocol(IP_PROTO_NUM_DDP);
+    public static final IpProtocol IP_PROTO_IDPR_CMTP = new IpProtocol(IP_PROTO_NUM_IDPR_CMTP);
+    public static final IpProtocol IP_PROTO_TP_PP = new IpProtocol(IP_PROTO_NUM_TP_PP);
+    public static final IpProtocol IP_PROTO_IL = new IpProtocol(IP_PROTO_NUM_IL);
+    public static final IpProtocol IP_PROTO_IPv6 = new IpProtocol(IP_PROTO_NUM_IPv6);
+    public static final IpProtocol IP_PROTO_SDRP = new IpProtocol(IP_PROTO_NUM_SDRP);
+    public static final IpProtocol IP_PROTO_IPv6_ROUTE = new IpProtocol(IP_PROTO_NUM_IPv6_ROUTE);
+    public static final IpProtocol IP_PROTO_IPv6_FRAG = new IpProtocol(IP_PROTO_NUM_IPv6_FRAG);
+    public static final IpProtocol IP_PROTO_IDRP = new IpProtocol(IP_PROTO_NUM_IDRP);
+    public static final IpProtocol IP_PROTO_RSVP = new IpProtocol(IP_PROTO_NUM_RSVP);
+    public static final IpProtocol IP_PROTO_GRE = new IpProtocol(IP_PROTO_NUM_GRE);
+    public static final IpProtocol IP_PROTO_MHRP = new IpProtocol(IP_PROTO_NUM_MHRP);
+    public static final IpProtocol IP_PROTO_BNA = new IpProtocol(IP_PROTO_NUM_BNA);
+    public static final IpProtocol IP_PROTO_ESP = new IpProtocol(IP_PROTO_NUM_ESP);
+    public static final IpProtocol IP_PROTO_AH = new IpProtocol(IP_PROTO_NUM_AH);
+    public static final IpProtocol IP_PROTO_I_NLSP = new IpProtocol(IP_PROTO_NUM_I_NLSP);
+    public static final IpProtocol IP_PROTO_SWIPE = new IpProtocol(IP_PROTO_NUM_SWIPE);
+    public static final IpProtocol IP_PROTO_NARP = new IpProtocol(IP_PROTO_NUM_NARP);
+    public static final IpProtocol IP_PROTO_MOBILE = new IpProtocol(IP_PROTO_NUM_MOBILE);
+    public static final IpProtocol IP_PROTO_TLSP = new IpProtocol(IP_PROTO_NUM_TLSP);
+    public static final IpProtocol IP_PROTO_SKIP = new IpProtocol(IP_PROTO_NUM_SKIP);
+    public static final IpProtocol IP_PROTO_IPv6_ICMP = new IpProtocol(IP_PROTO_NUM_IPv6_ICMP);
+    public static final IpProtocol IP_PROTO_IPv6_NO_NXT = new IpProtocol(IP_PROTO_NUM_IPv6_NO_NXT);
+    public static final IpProtocol IP_PROTO_IPv6_OPTS = new IpProtocol(IP_PROTO_NUM_IPv6_OPTS);
+    public static final IpProtocol IP_PROTO_HOST_INTERNAL = new IpProtocol(IP_PROTO_NUM_HOST_INTERNAL);
+    public static final IpProtocol IP_PROTO_CFTP = new IpProtocol(IP_PROTO_NUM_CFTP);
+    public static final IpProtocol IP_PROTO_LOCAL_NET = new IpProtocol(IP_PROTO_NUM_LOCAL_NET);
+    public static final IpProtocol IP_PROTO_SAT_EXPAK = new IpProtocol(IP_PROTO_NUM_SAT_EXPAK);
+    public static final IpProtocol IP_PROTO_KRYPTOLAN = new IpProtocol(IP_PROTO_NUM_KRYPTOLAN);
+    public static final IpProtocol IP_PROTO_RVD = new IpProtocol(IP_PROTO_NUM_RVD);
+    public static final IpProtocol IP_PROTO_IPPC = new IpProtocol(IP_PROTO_NUM_IPPC);
+    public static final IpProtocol IP_PROTO_DIST_FS = new IpProtocol(IP_PROTO_NUM_DIST_FS);
+    public static final IpProtocol IP_PROTO_SAT_MON = new IpProtocol(IP_PROTO_NUM_SAT_MON);
+    public static final IpProtocol IP_PROTO_VISA = new IpProtocol(IP_PROTO_NUM_VISA);
+    public static final IpProtocol IP_PROTO_IPCV = new IpProtocol(IP_PROTO_NUM_IPCV);
+    public static final IpProtocol IP_PROTO_CPNX = new IpProtocol(IP_PROTO_NUM_CPNX);
+    public static final IpProtocol IP_PROTO_CPHB = new IpProtocol(IP_PROTO_NUM_CPHB);
+    public static final IpProtocol IP_PROTO_WSN = new IpProtocol(IP_PROTO_NUM_WSN);
+    public static final IpProtocol IP_PROTO_PVP = new IpProtocol(IP_PROTO_NUM_PVP);
+    public static final IpProtocol IP_PROTO_BR_SAT_MON = new IpProtocol(IP_PROTO_NUM_BR_SAT_MON);
+    public static final IpProtocol IP_PROTO_SUN_ND = new IpProtocol(IP_PROTO_NUM_SUN_ND);
+    public static final IpProtocol IP_PROTO_WB_MON = new IpProtocol(IP_PROTO_NUM_WB_MON);
+    public static final IpProtocol IP_PROTO_WB_EXPAK = new IpProtocol(IP_PROTO_NUM_WB_EXPAK);
+    public static final IpProtocol IP_PROTO_ISO_IP = new IpProtocol(IP_PROTO_NUM_ISO_IP);
+    public static final IpProtocol IP_PROTO_VMTP = new IpProtocol(IP_PROTO_NUM_VMTP);
+    public static final IpProtocol IP_PROTO_SECURE_VMTP = new IpProtocol(IP_PROTO_NUM_SECURE_VMTP);
+    public static final IpProtocol IP_PROTO_VINES = new IpProtocol(IP_PROTO_NUM_VINES);
+    public static final IpProtocol IP_PROTO_TTP_IPTM = new IpProtocol(IP_PROTO_NUM_TTP_IPTM);
+    public static final IpProtocol IP_PROTO_NSFNET_IGP = new IpProtocol(IP_PROTO_NUM_NSFNET_IGP);
+    public static final IpProtocol IP_PROTO_DGP = new IpProtocol(IP_PROTO_NUM_DGP);
+    public static final IpProtocol IP_PROTO_TCF = new IpProtocol(IP_PROTO_NUM_TCF);
+    public static final IpProtocol IP_PROTO_EIGRP = new IpProtocol(IP_PROTO_NUM_EIGRP);
+    public static final IpProtocol IP_PROTO_OSPF = new IpProtocol(IP_PROTO_NUM_OSPF);
+    public static final IpProtocol IP_PROTO_Sprite_RPC = new IpProtocol(IP_PROTO_NUM_Sprite_RPC);
+    public static final IpProtocol IP_PROTO_LARP = new IpProtocol(IP_PROTO_NUM_LARP);
+    public static final IpProtocol IP_PROTO_MTP = new IpProtocol(IP_PROTO_NUM_MTP);
+    public static final IpProtocol IP_PROTO_AX_25 = new IpProtocol(IP_PROTO_NUM_AX_25);
+    public static final IpProtocol IP_PROTO_IPIP = new IpProtocol(IP_PROTO_NUM_IPIP);
+    public static final IpProtocol IP_PROTO_MICP = new IpProtocol(IP_PROTO_NUM_MICP);
+    public static final IpProtocol IP_PROTO_SCC_SP = new IpProtocol(IP_PROTO_NUM_SCC_SP);
+    public static final IpProtocol IP_PROTO_ETHERIP = new IpProtocol(IP_PROTO_NUM_ETHERIP);
+    public static final IpProtocol IP_PROTO_ENCAP = new IpProtocol(IP_PROTO_NUM_ENCAP);
+    public static final IpProtocol IP_PROTO_PRIVATE_ENCRYPT = new IpProtocol(IP_PROTO_NUM_PRIVATE_ENCRYPT);
+    public static final IpProtocol IP_PROTO_GMTP = new IpProtocol(IP_PROTO_NUM_GMTP);
+    public static final IpProtocol IP_PROTO_IFMP = new IpProtocol(IP_PROTO_NUM_IFMP);
+    public static final IpProtocol IP_PROTO_PNNI = new IpProtocol(IP_PROTO_NUM_PNNI);
+    public static final IpProtocol IP_PROTO_PIM = new IpProtocol(IP_PROTO_NUM_PIM);
+    public static final IpProtocol IP_PROTO_ARIS = new IpProtocol(IP_PROTO_NUM_ARIS);
+    public static final IpProtocol IP_PROTO_SCPS = new IpProtocol(IP_PROTO_NUM_SCPS);
+    public static final IpProtocol IP_PROTO_QNX = new IpProtocol(IP_PROTO_NUM_QNX);
+    public static final IpProtocol IP_PROTO_A_N = new IpProtocol(IP_PROTO_NUM_A_N);
+    public static final IpProtocol IP_PROTO_IP_COMP = new IpProtocol(IP_PROTO_NUM_IP_COMP);
+    public static final IpProtocol IP_PROTO_SNP = new IpProtocol(IP_PROTO_NUM_SNP);
+    public static final IpProtocol IP_PROTO_COMPAQ_PEER = new IpProtocol(IP_PROTO_NUM_COMPAQ_PEER);
+    public static final IpProtocol IP_PROTO_IPX_IN_IP = new IpProtocol(IP_PROTO_NUM_IPX_IN_IP);
+    public static final IpProtocol IP_PROTO_VRRP = new IpProtocol(IP_PROTO_NUM_VRRP);
+    public static final IpProtocol IP_PROTO_PGM = new IpProtocol(IP_PROTO_NUM_PGM);
+    public static final IpProtocol IP_PROTO_ZERO_HOP = new IpProtocol(IP_PROTO_NUM_ZERO_HOP);
+    public static final IpProtocol IP_PROTO_L2TP = new IpProtocol(IP_PROTO_NUM_L2TP);
+    public static final IpProtocol IP_PROTO_DDX = new IpProtocol(IP_PROTO_NUM_DDX);
+    public static final IpProtocol IP_PROTO_IATP = new IpProtocol(IP_PROTO_NUM_IATP);
+    public static final IpProtocol IP_PROTO_STP = new IpProtocol(IP_PROTO_NUM_STP);
+    public static final IpProtocol IP_PROTO_SRP = new IpProtocol(IP_PROTO_NUM_SRP);
+    public static final IpProtocol IP_PROTO_UTI = new IpProtocol(IP_PROTO_NUM_UTI);
+    public static final IpProtocol IP_PROTO_SMP = new IpProtocol(IP_PROTO_NUM_SMP);
+    public static final IpProtocol IP_PROTO_SM = new IpProtocol(IP_PROTO_NUM_SM);
+    public static final IpProtocol IP_PROTO_PTP = new IpProtocol(IP_PROTO_NUM_PTP);
+    public static final IpProtocol IP_PROTO_IS_IS_OVER_IPv4 = new IpProtocol(IP_PROTO_NUM_IS_IS_OVER_IPv4);
+    public static final IpProtocol IP_PROTO_FIRE = new IpProtocol(IP_PROTO_NUM_FIRE);
+    public static final IpProtocol IP_PROTO_CRTP = new IpProtocol(IP_PROTO_NUM_CRTP);
+    public static final IpProtocol IP_PROTO_CRUDP = new IpProtocol(IP_PROTO_NUM_CRUDP);
+    public static final IpProtocol IP_PROTO_SSCOPMCE = new IpProtocol(IP_PROTO_NUM_SSCOPMCE);
+    public static final IpProtocol IP_PROTO_IPLT = new IpProtocol(IP_PROTO_NUM_IPLT);
+    public static final IpProtocol IP_PROTO_SPS = new IpProtocol(IP_PROTO_NUM_SPS);
+    public static final IpProtocol IP_PROTO_PIPE = new IpProtocol(IP_PROTO_NUM_PIPE);
+    public static final IpProtocol IP_PROTO_SCTP = new IpProtocol(IP_PROTO_NUM_SCTP);
+    public static final IpProtocol IP_PROTO_FC = new IpProtocol(IP_PROTO_NUM_FC);
+    public static final IpProtocol IP_PROTO_RSVP_E2E_IGNORE = new IpProtocol(IP_PROTO_NUM_RSVP_E2E_IGNORE);
+    public static final IpProtocol IP_PROTO_MOBILITY_HEADER = new IpProtocol(IP_PROTO_NUM_MOBILITY_HEADER);
+    public static final IpProtocol IP_PROTO_UDP_LITE = new IpProtocol(IP_PROTO_NUM_UDP_LITE);
+    public static final IpProtocol IP_PROTO_MPLS_IN_IP = new IpProtocol(IP_PROTO_NUM_MPLS_IN_IP);
+    public static final IpProtocol IP_PROTO_MANET = new IpProtocol(IP_PROTO_NUM_MANET);
+    public static final IpProtocol IP_PROTO_HIP = new IpProtocol(IP_PROTO_NUM_HIP);
+    public static final IpProtocol IP_PROTO_SHIM6 = new IpProtocol(IP_PROTO_NUM_SHIM6);
+
+    private IpProtocol(short version) {
+        this.proto = version;
+    }
+
+
+    @Override
+    public int getLength() {
+        return LENGTH;
+    }
+
+    volatile byte[] bytesCache = null;
+
+    @Override
+    public byte[] getBytes() {
+        if (bytesCache == null) {
+            synchronized (this) {
+                if (bytesCache == null) {
+                    bytesCache = new byte[] { (byte)proto };
+                }
+            }
+        }
+        return bytesCache;
+    }
+
+    public static IpProtocol of(short proto) {
+        switch (proto) {
+            case IP_PROTO_NUM_HOPOPT:
+                return IP_PROTO_HOPOPT;
+            case IP_PROTO_NUM_ICMP:
+                return IP_PROTO_ICMP;
+            case IP_PROTO_NUM_IGMP:
+                return IP_PROTO_IGMP;
+            case IP_PROTO_NUM_GGP:
+                return IP_PROTO_GGP;
+            case IP_PROTO_NUM_IPv4:
+                return IP_PROTO_IPv4;
+            case IP_PROTO_NUM_ST:
+                return IP_PROTO_ST;
+            case IP_PROTO_NUM_TCP:
+                return IP_PROTO_TCP;
+            case IP_PROTO_NUM_CBT:
+                return IP_PROTO_CBT;
+            case IP_PROTO_NUM_EGP:
+                return IP_PROTO_EGP;
+            case IP_PROTO_NUM_IGP:
+                return IP_PROTO_IGP;
+            case IP_PROTO_NUM_BBN_RCC_MON:
+                return IP_PROTO_BBN_RCC_MON;
+            case IP_PROTO_NUM_NVP_II:
+                return IP_PROTO_NVP_II;
+            case IP_PROTO_NUM_PUP:
+                return IP_PROTO_PUP;
+            case IP_PROTO_NUM_ARGUS:
+                return IP_PROTO_ARGUS;
+            case IP_PROTO_NUM_EMCON:
+                return IP_PROTO_EMCON;
+            case IP_PROTO_NUM_XNET:
+                return IP_PROTO_XNET;
+            case IP_PROTO_NUM_CHAOS:
+                return IP_PROTO_CHAOS;
+            case IP_PROTO_NUM_UDP:
+                return IP_PROTO_UDP;
+            case IP_PROTO_NUM_MUX:
+                return IP_PROTO_MUX;
+            case IP_PROTO_NUM_DCN_MEAS:
+                return IP_PROTO_DCN_MEAS;
+            case IP_PROTO_NUM_HMP:
+                return IP_PROTO_HMP;
+            case IP_PROTO_NUM_PRM:
+                return IP_PROTO_PRM;
+            case IP_PROTO_NUM_XNS_IDP:
+                return IP_PROTO_XNS_IDP;
+            case IP_PROTO_NUM_TRUNK_1:
+                return IP_PROTO_TRUNK_1;
+            case IP_PROTO_NUM_TRUNK_2:
+                return IP_PROTO_TRUNK_2;
+            case IP_PROTO_NUM_LEAF_1:
+                return IP_PROTO_LEAF_1;
+            case IP_PROTO_NUM_LEAF_2:
+                return IP_PROTO_LEAF_2;
+            case IP_PROTO_NUM_RDP:
+                return IP_PROTO_RDP;
+            case IP_PROTO_NUM_IRTP:
+                return IP_PROTO_IRTP;
+            case IP_PROTO_NUM_ISO_TP4:
+                return IP_PROTO_ISO_TP4;
+            case IP_PROTO_NUM_NETBLT:
+                return IP_PROTO_NETBLT;
+            case IP_PROTO_NUM_MFE_NSP:
+                return IP_PROTO_MFE_NSP;
+            case IP_PROTO_NUM_MERIT_INP:
+                return IP_PROTO_MERIT_INP;
+            case IP_PROTO_NUM_DCCP:
+                return IP_PROTO_DCCP;
+            case IP_PROTO_NUM_3PC:
+                return IP_PROTO_3PC;
+            case IP_PROTO_NUM_IDPR:
+                return IP_PROTO_IDPR;
+            case IP_PROTO_NUM_XTP:
+                return IP_PROTO_XTP;
+            case IP_PROTO_NUM_DDP:
+                return IP_PROTO_DDP;
+            case IP_PROTO_NUM_IDPR_CMTP:
+                return IP_PROTO_IDPR_CMTP;
+            case IP_PROTO_NUM_TP_PP:
+                return IP_PROTO_TP_PP;
+            case IP_PROTO_NUM_IL:
+                return IP_PROTO_IL;
+            case IP_PROTO_NUM_IPv6:
+                return IP_PROTO_IPv6;
+            case IP_PROTO_NUM_SDRP:
+                return IP_PROTO_SDRP;
+            case IP_PROTO_NUM_IPv6_ROUTE:
+                return IP_PROTO_IPv6_ROUTE;
+            case IP_PROTO_NUM_IPv6_FRAG:
+                return IP_PROTO_IPv6_FRAG;
+            case IP_PROTO_NUM_IDRP:
+                return IP_PROTO_IDRP;
+            case IP_PROTO_NUM_RSVP:
+                return IP_PROTO_RSVP;
+            case IP_PROTO_NUM_GRE:
+                return IP_PROTO_GRE;
+            case IP_PROTO_NUM_MHRP:
+                return IP_PROTO_MHRP;
+            case IP_PROTO_NUM_BNA:
+                return IP_PROTO_BNA;
+            case IP_PROTO_NUM_ESP:
+                return IP_PROTO_ESP;
+            case IP_PROTO_NUM_AH:
+                return IP_PROTO_AH;
+            case IP_PROTO_NUM_I_NLSP:
+                return IP_PROTO_I_NLSP;
+            case IP_PROTO_NUM_SWIPE:
+                return IP_PROTO_SWIPE;
+            case IP_PROTO_NUM_NARP:
+                return IP_PROTO_NARP;
+            case IP_PROTO_NUM_MOBILE:
+                return IP_PROTO_MOBILE;
+            case IP_PROTO_NUM_TLSP:
+                return IP_PROTO_TLSP;
+            case IP_PROTO_NUM_SKIP:
+                return IP_PROTO_SKIP;
+            case IP_PROTO_NUM_IPv6_ICMP:
+                return IP_PROTO_IPv6_ICMP;
+            case IP_PROTO_NUM_IPv6_NO_NXT:
+                return IP_PROTO_IPv6_NO_NXT;
+            case IP_PROTO_NUM_IPv6_OPTS:
+                return IP_PROTO_IPv6_OPTS;
+            case IP_PROTO_NUM_HOST_INTERNAL:
+                return IP_PROTO_HOST_INTERNAL;
+            case IP_PROTO_NUM_CFTP:
+                return IP_PROTO_CFTP;
+            case IP_PROTO_NUM_LOCAL_NET:
+                return IP_PROTO_LOCAL_NET;
+            case IP_PROTO_NUM_SAT_EXPAK:
+                return IP_PROTO_SAT_EXPAK;
+            case IP_PROTO_NUM_KRYPTOLAN:
+                return IP_PROTO_KRYPTOLAN;
+            case IP_PROTO_NUM_RVD:
+                return IP_PROTO_RVD;
+            case IP_PROTO_NUM_IPPC:
+                return IP_PROTO_IPPC;
+            case IP_PROTO_NUM_DIST_FS:
+                return IP_PROTO_DIST_FS;
+            case IP_PROTO_NUM_SAT_MON:
+                return IP_PROTO_SAT_MON;
+            case IP_PROTO_NUM_VISA:
+                return IP_PROTO_VISA;
+            case IP_PROTO_NUM_IPCV:
+                return IP_PROTO_IPCV;
+            case IP_PROTO_NUM_CPNX:
+                return IP_PROTO_CPNX;
+            case IP_PROTO_NUM_CPHB:
+                return IP_PROTO_CPHB;
+            case IP_PROTO_NUM_WSN:
+                return IP_PROTO_WSN;
+            case IP_PROTO_NUM_PVP:
+                return IP_PROTO_PVP;
+            case IP_PROTO_NUM_BR_SAT_MON:
+                return IP_PROTO_BR_SAT_MON;
+            case IP_PROTO_NUM_SUN_ND:
+                return IP_PROTO_SUN_ND;
+            case IP_PROTO_NUM_WB_MON:
+                return IP_PROTO_WB_MON;
+            case IP_PROTO_NUM_WB_EXPAK:
+                return IP_PROTO_WB_EXPAK;
+            case IP_PROTO_NUM_ISO_IP:
+                return IP_PROTO_ISO_IP;
+            case IP_PROTO_NUM_VMTP:
+                return IP_PROTO_VMTP;
+            case IP_PROTO_NUM_SECURE_VMTP:
+                return IP_PROTO_SECURE_VMTP;
+            case IP_PROTO_NUM_VINES:
+                return IP_PROTO_VINES;
+            case IP_PROTO_NUM_TTP_IPTM:
+                return IP_PROTO_TTP_IPTM;
+            case IP_PROTO_NUM_NSFNET_IGP:
+                return IP_PROTO_NSFNET_IGP;
+            case IP_PROTO_NUM_DGP:
+                return IP_PROTO_DGP;
+            case IP_PROTO_NUM_TCF:
+                return IP_PROTO_TCF;
+            case IP_PROTO_NUM_EIGRP:
+                return IP_PROTO_EIGRP;
+            case IP_PROTO_NUM_OSPF:
+                return IP_PROTO_OSPF;
+            case IP_PROTO_NUM_Sprite_RPC:
+                return IP_PROTO_Sprite_RPC;
+            case IP_PROTO_NUM_LARP:
+                return IP_PROTO_LARP;
+            case IP_PROTO_NUM_MTP:
+                return IP_PROTO_MTP;
+            case IP_PROTO_NUM_AX_25:
+                return IP_PROTO_AX_25;
+            case IP_PROTO_NUM_IPIP:
+                return IP_PROTO_IPIP;
+            case IP_PROTO_NUM_MICP:
+                return IP_PROTO_MICP;
+            case IP_PROTO_NUM_SCC_SP:
+                return IP_PROTO_SCC_SP;
+            case IP_PROTO_NUM_ETHERIP:
+                return IP_PROTO_ETHERIP;
+            case IP_PROTO_NUM_ENCAP:
+                return IP_PROTO_ENCAP;
+            case IP_PROTO_NUM_PRIVATE_ENCRYPT:
+                return IP_PROTO_PRIVATE_ENCRYPT;
+            case IP_PROTO_NUM_GMTP:
+                return IP_PROTO_GMTP;
+            case IP_PROTO_NUM_IFMP:
+                return IP_PROTO_IFMP;
+            case IP_PROTO_NUM_PNNI:
+                return IP_PROTO_PNNI;
+            case IP_PROTO_NUM_PIM:
+                return IP_PROTO_PIM;
+            case IP_PROTO_NUM_ARIS:
+                return IP_PROTO_ARIS;
+            case IP_PROTO_NUM_SCPS:
+                return IP_PROTO_SCPS;
+            case IP_PROTO_NUM_QNX:
+                return IP_PROTO_QNX;
+            case IP_PROTO_NUM_A_N:
+                return IP_PROTO_A_N;
+            case IP_PROTO_NUM_IP_COMP:
+                return IP_PROTO_IP_COMP;
+            case IP_PROTO_NUM_SNP:
+                return IP_PROTO_SNP;
+            case IP_PROTO_NUM_COMPAQ_PEER:
+                return IP_PROTO_COMPAQ_PEER;
+            case IP_PROTO_NUM_IPX_IN_IP:
+                return IP_PROTO_IPX_IN_IP;
+            case IP_PROTO_NUM_VRRP:
+                return IP_PROTO_VRRP;
+            case IP_PROTO_NUM_PGM:
+                return IP_PROTO_PGM;
+            case IP_PROTO_NUM_ZERO_HOP:
+                return IP_PROTO_ZERO_HOP;
+            case IP_PROTO_NUM_L2TP:
+                return IP_PROTO_L2TP;
+            case IP_PROTO_NUM_DDX:
+                return IP_PROTO_DDX;
+            case IP_PROTO_NUM_IATP:
+                return IP_PROTO_IATP;
+            case IP_PROTO_NUM_STP:
+                return IP_PROTO_STP;
+            case IP_PROTO_NUM_SRP:
+                return IP_PROTO_SRP;
+            case IP_PROTO_NUM_UTI:
+                return IP_PROTO_UTI;
+            case IP_PROTO_NUM_SMP:
+                return IP_PROTO_SMP;
+            case IP_PROTO_NUM_SM:
+                return IP_PROTO_SM;
+            case IP_PROTO_NUM_PTP:
+                return IP_PROTO_PTP;
+            case IP_PROTO_NUM_IS_IS_OVER_IPv4:
+                return IP_PROTO_IS_IS_OVER_IPv4;
+            case IP_PROTO_NUM_FIRE:
+                return IP_PROTO_FIRE;
+            case IP_PROTO_NUM_CRTP:
+                return IP_PROTO_CRTP;
+            case IP_PROTO_NUM_CRUDP:
+                return IP_PROTO_CRUDP;
+            case IP_PROTO_NUM_SSCOPMCE:
+                return IP_PROTO_SSCOPMCE;
+            case IP_PROTO_NUM_IPLT:
+                return IP_PROTO_IPLT;
+            case IP_PROTO_NUM_SPS:
+                return IP_PROTO_SPS;
+            case IP_PROTO_NUM_PIPE:
+                return IP_PROTO_PIPE;
+            case IP_PROTO_NUM_SCTP:
+                return IP_PROTO_SCTP;
+            case IP_PROTO_NUM_FC:
+                return IP_PROTO_FC;
+            case IP_PROTO_NUM_RSVP_E2E_IGNORE:
+                return IP_PROTO_RSVP_E2E_IGNORE;
+            case IP_PROTO_NUM_MOBILITY_HEADER:
+                return IP_PROTO_MOBILITY_HEADER;
+            case IP_PROTO_NUM_UDP_LITE:
+                return IP_PROTO_UDP_LITE;
+            case IP_PROTO_NUM_MPLS_IN_IP:
+                return IP_PROTO_MPLS_IN_IP;
+            case IP_PROTO_NUM_MANET:
+                return IP_PROTO_MANET;
+            case IP_PROTO_NUM_HIP:
+                return IP_PROTO_HIP;
+            case IP_PROTO_NUM_SHIM6:
+                return IP_PROTO_SHIM6;
+            default:
+                if (proto >= MAX_PROTO) {
+                    throw new IllegalArgumentException("Illegal IP protocol number: "
+                            + proto);
+                } else {
+                    return new IpProtocol(proto);
+                }
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof IpProtocol))
+            return false;
+        IpProtocol o = (IpProtocol)obj;
+        if (o.proto != this.proto)
+            return false;
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 37;
+        int result = 1;
+        result = prime * result + proto;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return Integer.toHexString(proto);
+    }
+
+    public static final Serializer<IpProtocol> SERIALIZER_V10 = new SerializerV10();
+    public static final Serializer<IpProtocol> SERIALIZER_V11 = SERIALIZER_V10;
+    public static final Serializer<IpProtocol> SERIALIZER_V12 = SERIALIZER_V10;
+    public static final Serializer<IpProtocol> SERIALIZER_V13 = SERIALIZER_V10;
+
+    private static class SerializerV10 implements OFValueType.Serializer<IpProtocol> {
+
+        @Override
+        public void writeTo(IpProtocol value, ChannelBuffer c) {
+            c.writeByte(value.proto);
+        }
+
+        @Override
+        public IpProtocol readFrom(ChannelBuffer c) throws OFParseError {
+            return IpProtocol.of((short)(c.readUnsignedByte() & 0x00FF));
+        }
+
+    }
 
 }