module openconfig-packet-match-types {

  yang-version "1";

  // namespace
  namespace "http://openconfig.net/yang/packet-match-types";

  prefix "oc-pkt-match-types";

  // import some basic types
  import openconfig-inet-types { prefix oc-inet; }
  import openconfig-extensions { prefix oc-ext; }


  // meta
  organization "OpenConfig working group";

  contact
    "OpenConfig working group
    www.openconfig.net";

  description
    "This module defines common types for use in models requiring
    data definitions related to packet matches.";

  oc-ext:openconfig-version "1.0.2";

  revision "2018-11-21" {
    description
      "Add OpenConfig module metadata extensions.";
    reference "1.0.2";
  }

  revision "2018-04-15" {
    description
        "Corrected description and range for ethertype typedef";
    reference "1.0.1";
  }

  revision "2017-05-26" {
    description
        "Separated IP matches into AFs";
    reference "1.0.0";
  }

    revision "2016-08-08" {
    description
      "OpenConfig public release";
    reference "0.2.0";
  }

  revision "2016-04-27" {
    description
      "Initial revision";
    reference "TBD";
  }

  // OpenConfig specific extensions for module metadata.
  oc-ext:regexp-posix;
  oc-ext:catalog-organization "openconfig";
  oc-ext:origin "openconfig";


  // extension statements

  // feature statements

  // identity statements


  //TODO: should replace this with an official IEEE module
  // when available.  Only a select number of types are
  // defined in this identity.
  identity ETHERTYPE {
    description
      "Base identity for commonly used Ethertype values used
      in packet header matches on Ethernet frames.  The Ethertype
      indicates which protocol is encapsulated in the Ethernet
      payload.";
    reference
      "IEEE 802.3";
  }

  identity ETHERTYPE_IPV4 {
    base ETHERTYPE;
    description
      "IPv4 protocol (0x0800)";
  }

  identity ETHERTYPE_ARP {
    base ETHERTYPE;
    description
      "Address resolution protocol (0x0806)";
  }

  identity ETHERTYPE_VLAN {
    base ETHERTYPE;
    description
      "VLAN-tagged frame (as defined by IEEE 802.1q) (0x8100). Note
      that this value is also used to represent Shortest Path
      Bridging (IEEE 801.1aq) frames.";
  }

  identity ETHERTYPE_IPV6 {
    base ETHERTYPE;
    description
      "IPv6 protocol (0x86DD)";
  }

  identity ETHERTYPE_MPLS {
    base ETHERTYPE;
    description
      "MPLS unicast (0x8847)";
  }

  identity ETHERTYPE_LLDP {
    base ETHERTYPE;
    description
      "Link Layer Discovery Protocol (0x88CC)";
  }

  identity ETHERTYPE_ROCE {
    base ETHERTYPE;
    description
      "RDMA over Converged Ethernet (0x8915)";
  }


  //TODO: should replace this with an official IANA module when
  //available.  Only a select set of protocols are defined with
  //this identity.
  identity IP_PROTOCOL {
    description
      "Base identity for commonly used IP protocols used in
      packet header matches";
    reference
      "IANA Assigned Internet Protocol Numbers";
  }

  identity IP_TCP {
    base IP_PROTOCOL;
    description
      "Transmission Control Protocol (6)";
  }

  identity IP_UDP  {
    base IP_PROTOCOL;
    description
      "User Datagram Protocol (17)";
  }

  identity IP_ICMP {
    base IP_PROTOCOL;
    description
      "Internet Control Message Protocol (1)";
  }

  identity IP_IGMP {
    base IP_PROTOCOL;
    description
      "Internet Group Membership Protocol (2)";
  }

  identity IP_PIM {
    base IP_PROTOCOL;
    description
      "Protocol Independent Multicast (103)";
  }

  identity IP_RSVP {
    base IP_PROTOCOL;
    description
      "Resource Reservation Protocol (46)";
  }

  identity IP_GRE {
    base IP_PROTOCOL;
    description
      "Generic Routing Encapsulation (47)";
  }

  identity IP_AUTH {
    base IP_PROTOCOL;
    description
      "Authentication header, e.g., for IPSEC (51)";
  }

  identity IP_L2TP {
    base IP_PROTOCOL;
    description
      "Layer Two Tunneling Protocol v.3 (115)";
  }



  identity TCP_FLAGS {
    description
      "Common TCP flags used in packet header matches";
    reference
      "IETF RFC 793 - Transmission Control Protocol
      IETF RFC 3168 - The Addition of Explicit Congestion
      Notification (ECN) to IP";
  }

  identity TCP_SYN {
    base TCP_FLAGS;
    description
      "TCP SYN flag";
  }

  identity TCP_FIN {
    base TCP_FLAGS;
    description
      "TCP FIN flag";
  }

  identity TCP_RST {
    base TCP_FLAGS;
    description
      "TCP RST flag";
  }

  identity TCP_PSH {
    base TCP_FLAGS;
    description
      "TCP push flag";
  }

  identity TCP_ACK {
    base TCP_FLAGS;
    description
      "TCP ACK flag";
  }

  identity TCP_URG {
    base TCP_FLAGS;
    description
      "TCP urgent flag";
  }

  identity TCP_ECE {
    base TCP_FLAGS;
    description
      "TCP ECN-Echo flag.  If the SYN flag is set, indicates that
      the TCP peer is ECN-capable, otherwise indicates that a
      packet with Congestion Experienced flag in the IP header
      is set";
  }

  identity TCP_CWR {
    base TCP_FLAGS;
    description
      "TCP Congestion Window Reduced flag";
  }

  // typedef statements

  typedef port-num-range {
    type union {
      type string {
        pattern '^(6[0-5][0-5][0-3][0-5]|[0-5]?[0-9]?[0-9]?[0-9]?' +
          '[0-9]?)\.\.(6[0-5][0-5][0-3][0-5]|[0-5]?[0-9]?[0-9]?' +
          '[0-9]?[0-9]?)$';
      }
      type oc-inet:port-number;
      type enumeration {
        enum ANY {
          description
            "Indicates any valid port number (e.g., wildcard)";
        }
      }
    }
    description
      "Port numbers may be represented as a single value,
      an inclusive range as <lower>..<higher>, or as ANY to
      indicate a wildcard.";
  }

  typedef ip-protocol-type {
    type union {
      type uint8 {
        range 0..254;
      }
      type identityref {
        base IP_PROTOCOL;
      }
    }
    description
      "The IP protocol number may be expressed as a valid protocol
      number (integer) or using a protocol type defined by the
      IP_PROTOCOL identity";
  }

  typedef ethertype-type {
    type union {
      type uint16 {
        range 1536..65535;
      }
      type identityref {
        base ETHERTYPE;
      }
    }
    description
      "The Ethertype value may be expressed as a 16-bit number in
      decimal notation, or using a type defined by the
      ETHERTYPE identity";
  }

}