module huawei-pp4 {

    yang-version 1;

    namespace "urn:huawei:yang:huawei-pp4";

    prefix pp4;

    import huawei-extension {
      prefix ext;
    }
    import huawei-ifm {
      prefix ifm;
    }
    import huawei-mpls {
      prefix mpls;
    }
    import huawei-acl {
      prefix acl;
    }
    import huawei-network-instance {
      prefix ni;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
    Bantian, Longgang
    Shenzhen 518129
    People's Republic of China
    Website: http://www.huawei.com
    Email: support@huawei.com";

    description "IPv4.";

    revision "2020-03-06" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "ip-stack";

    typedef pp4-icmpsec-type {
      type enumeration {
        enum "echo" {
          value 1;
          description "Type=8, code=0.";
        }
        enum "echo-reply" {
          value 2;
          description "Type=0, code=0.";
        }
        enum "fragmentneed-dfset" {
          value 3;
          description "Type=3, code=4.";
        }
        enum "host-redirect" {
          value 4;
          description "Type=5, code=1.";
        }
        enum "host-tos-redirect" {
          value 5;
          description "Type=5, code=3.";
        }
        enum "host-unreachable" {
          value 6;
          description "Type=3, code=1.";
        }
        enum "information-reply" {
          value 7;
          description "Type=16, code=0.";
        }
        enum "information-request" {
          value 8;
          description "Type=15, code=0.";
        }
        enum "net-redirect" {
          value 9;
          description "Type=5, code=0.";
        }
        enum "net-tos-redirect" {
          value 10;
          description "Type=5, code=2.";
        }
        enum "net-unreachable" {
          value 11;
          description "Type=3, code=0.";
        }
        enum "parameter-problem" {
          value 12;
          description "Type=12, code=0.";
        }
        enum "port-unreachable" {
          value 13;
          description "Type=3, code=3.";
        }
        enum "protocol-unreachable" {
          value 14;
          description "Type=3, code=2.";
        }
        enum "reassembly-timeout" {
          value 15;
          description "Type=11, code=1.";
        }
        enum "source-quench" {
          value 16;
          description "Type=4, code=0.";
        }
        enum "source-route-failed" {
          value 17;
          description "Type=3, code=5.";
        }
        enum "timestamp-reply" {
          value 18;
          description "Type=14, code=0.";
        }
        enum "timestamp-request" {
          value 19;
          description "Type=13, code=0.";
        }
        enum "ttl-exceeded" {
          value 20;
          description "Type=11, code=0.";
        }
        enum "user-defined" {
          value 0;
          description "User defined.";
        }
      }
      description "PP4 ICMP security type.";
    }

    typedef pp4-pkt-action {
      type enumeration {
        enum "receive-pkt" {
          value 0;
          description "Packet reception.";
        }
        enum "send-pkt" {
          value 1;
          description "Packet sending.";
        }
      }
      description "PP4 packet action.";
    }

    typedef pp4-switch-operation {
      type enumeration {
        enum "enable" {
          value 0;
          description "Enabling.";
        }
        enum "disable" {
          value 1;
          description "Disabling.";
        }
      }
      description "PP4 switch operation.";
    }

    typedef pp4-option-type {
      type enumeration {
        enum "route-alert" {
          value 0;
          description "Route alert option.";
        }
        enum "route-record" {
          value 1;
          description "Route record option.";
        }
        enum "source-route" {
          value 2;
          description "Source route option.";
        }
        enum "time-stamp" {
          value 3;
          description "Time stamp option.";
        }
      }
      description "PP4 option type.";
    }

    typedef app-proto-type {
      type enumeration {
        enum "management" {
          value 1;
          description "Management protocol.";
        }
        enum "control" {
          value 2;
          description "Control protocol.";
        }
      }
      description
        "Application protocol type.";
    }

    typedef pkt-service-class {
      type enumeration {
        enum "te-priority" {
          value 1;
          description "TE priority.";
        }
      }
      description "Packet service class.";
    }

    typedef pp4-fast-switch {
      type enumeration {
        enum "disable" {
          value 0;
          description
            "Host packet fast disable.";
        }
        enum "enable" {
          value 1;
          description
            "Host packet fast enable.";
        }
      }
      description "PP4 fast switch.";
    }

    typedef pp4-icmp-src-type {
      type enumeration {
        enum "port-unreachable" {
          value 1;
          description "Type=3, code=3.";
        }
        enum "ttl-exceeded" {
          value 2;
          description "Type=11, code=0.";
        }
        enum "all-tracert" {
          value 3;
          description
            "Type=11, code=0 and type=3, code=3.";
        }
      }
      description "PP4 ICMP source type.";
    }

    typedef app-proto-name {
      type enumeration {
        enum "ftp" {
          value 0;
          description "Ftp.";
        }
        enum "hwtacacs" {
          value 1;
          description "Hwtacacs.";
        }
        enum "ntp" {
          value 2;
          description "Ntp.";
        }
        enum "snmp" {
          value 3;
          description "Snmp.";
        }
        enum "ssh" {
          value 4;
          description "Ssh.";
        }
        enum "syslog" {
          value 5;
          description "Syslog.";
        }
        enum "telnet" {
          value 6;
          description "Telnet.";
        }
        enum "tftp" {
          value 7;
          description "Tftp.";
        }
        enum "bfd" {
          value 8;
          description "Bfd.";
        }
        enum "bgp" {
          value 9;
          description "Bgp.";
        }
        enum "cusp" {
          value 10;
          description "Cusp.";
        }
        enum "isis" {
          value 11;
          description "Isis.";
        }
        enum "ldp" {
          value 12;
          description "Ldp.";
        }
        enum "ospf" {
          value 13;
          description "Ospf.";
        }
        enum "ospfv3" {
          value 14;
          description "Ospfv3.";
        }
        enum "rip" {
          value 15;
          description "Rip.";
        }
      }
      description
        "PP4 host protocol packet type.";
    }

    container pp4 {
      description "IPv4.";
      container global {
        description
          "Configure IPv4 global configuration.";
        leaf reassembling-timeout {
          type uint32 {
            range "5..120";
          }
          units "s";
          default "30";
          description
            "Configuration of timeout period for reassembling packets. The value is expressed in seconds.";
        }

        leaf blacklist-flag {
          type boolean;
          default "false";
          description
            "Enable/disable IP blacklist option.";
        }

        leaf route-aler-switch {
          type pp4-switch-operation;
          default "enable";
          description
            "Enabling or disabling of global route-aler IP option packet configuration.";
        }

        leaf route-record-switch {
          type pp4-switch-operation;
          default "enable";
          description
            "Enabling or disabling of global route-record IP option packet configuration.";
        }

        leaf source-route-switch {
          type pp4-switch-operation;
          default "enable";
          description
            "Enabling or disabling of global source-route IP option packet configuration.";
        }

        leaf time-stamp-switch {
          type pp4-switch-operation;
          default "enable";
          description
            "Enabling or disabling of global time-stamp IP option packet configuration.";
        }

        leaf te-pkt-ctrl-switch {
          type pp4-switch-operation;
          default "disable";
          description
            "Enabling or disabling of packet control policy.";
        }

        leaf source-ingress-interface {
          type boolean;
          default "false";
          description
            "Enable/disable source selection for the incoming interface of ttl-exceeded packets.";
        }
      }  // container global

      container icmp-securitys {
        description
          "List of global ICMP security configuration.";
        list icmp-security {
          must
            "((((icmp-name='echo' and icmp-type=8 and icmp-code=0) or (icmp-name='echo-reply' and icmp-type=0 and icmp-code=0) or (icmp-name='fragmentneed-dfset' and icmp-type=3 and icmp-code=4) or (icmp-name='host-redirect' and icmp-type=5 and icmp-code=1) or (icmp-name='host-tos-redirect' and icmp-type=5 and icmp-code=3) or (icmp-name='host-unreachable' and icmp-type=3 and icmp-code=1) or (icmp-name='information-reply' and icmp-type=16 and icmp-code=0) or (icmp-name='information-request' and icmp-type=15 and icmp-code=0) or (icmp-name='net-redirect' and icmp-type=5 and icmp-code=0) or (icmp-name='net-tos-redirect' and icmp-type=5 and icmp-code=2) or (icmp-name='net-unreachable' and icmp-type=3 and icmp-code=0) or (icmp-name='parameter-problem' and icmp-type=12 and icmp-code=0) or (icmp-name='port-unreachable' and icmp-type=3 and icmp-code=3) or (icmp-name='protocol-unreachable' and icmp-type=3 and icmp-code=2) or (icmp-name='reassembly-timeout' and icmp-type=11 and icmp-code=1) or (icmp-name='source-quench' and icmp-type=4 and icmp-code=0) or (icmp-name='source-route-failed' and icmp-type=3 and icmp-code=5) or (icmp-name='timestamp-reply' and icmp-type=14 and icmp-code=0) or (icmp-name='timestamp-request' and icmp-type=13 and icmp-code=0) or (icmp-name='ttl-exceeded' and icmp-type=11 and icmp-code=0) or icmp-name='user-defined') and action ='receive-pkt') or (((icmp-name='echo' and icmp-type=8 and icmp-code=0) or (icmp-name='echo-reply' and icmp-type=0 and icmp-code=0) or (icmp-name='fragmentneed-dfset' and icmp-type=3 and icmp-code=4) or (icmp-name='net-unreachable' and icmp-type=3 and icmp-code=0) or (icmp-name='parameter-problem' and icmp-type=12 and icmp-code=0) or (icmp-name='port-unreachable' and icmp-type=3 and icmp-code=3) or (icmp-name='reassembly-timeout' and icmp-type=11 and icmp-code=1) or (icmp-name='source-route-failed' and icmp-type=3 and icmp-code=5) or (icmp-name='timestamp-reply' and icmp-type=14 and icmp-code=0) or (icmp-name='timestamp-request' and icmp-type=13 and icmp-code=0) or (icmp-name='ttl-exceeded' and icmp-type=11 and icmp-code=0)) and action ='send-pkt'))";
          key "action icmp-name icmp-type icmp-code";
          description
            "Configure global ICMP security function.";
          leaf action {
            type pp4-pkt-action;
            description
              "Packet reception or packet sending.";
          }

          leaf icmp-name {
            type pp4-icmpsec-type;
            description "ICMP names.";
          }

          leaf icmp-type {
            type uint32 {
              range "0..255";
            }
            description
              "ICMP types. For the value of this node, see the description of pp4-icmpsec-type.";
          }

          leaf icmp-code {
            type uint32 {
              range "0..255";
            }
            description
              "ICMP code. For the value of this node, see the description of pp4-icmpsec-type.";
          }

          leaf switch-operation {
            type pp4-switch-operation;
            mandatory true;
            description
              "Enabling or disabling of ICMP packet security configuration.";
          }
        }  // list icmp-security
      }  // container icmp-securitys

      container ip-dscps {
        description
          "List of DSCP configuration.";
        list ip-dscp {
          key "proto-type";
          max-elements 2;
          description "Specify DSCP value.";
          leaf proto-type {
            type app-proto-type;
            description "Protocol type.";
          }

          leaf dscp {
            type uint32 {
              range "0..63";
            }
            default "0";
            description "DSCP priority.";
          }
        }  // list ip-dscp
      }  // container ip-dscps

      container pkt-fast-reply-ctrl {
        description
          "Configure host packet fast reply control.";
        leaf tcp-action {
          type pp4-fast-switch;
          default "enable";
          description
            "Host TCP packet fast reply control.";
        }

        leaf udp-action {
          type pp4-fast-switch;
          default "enable";
          description
            "Host UDP packet fast reply control.";
        }

        leaf rawip-action {
          type pp4-fast-switch;
          default "enable";
          description
            "Host Rawip packet fast reply control.";
        }
      }  // container pkt-fast-reply-ctrl

      container pkt-fast-reply-snd {
        description
          "Configure host packet fast send control.";
        leaf tcp-action {
          type pp4-fast-switch;
          default "disable";
          description
            "Host TCP packet fast send control.";
        }

        leaf udp-action {
          type pp4-fast-switch;
          default "disable";
          description
            "Host UDP packet fast send control.";
        }

        leaf rawip-action {
          type pp4-fast-switch;
          default "disable";
          description
            "Host Rawip packet fast send control.";
        }
      }  // container pkt-fast-reply-snd

      container host-proto-types {
        config false;
        description
          "List of host protocol type.";
        list host-proto-type {
          key "packet-type";
          description
            "Operational data of host protocol type.";
          leaf packet-type {
            type app-proto-name;
            description "Application name.";
          }

          leaf protocol-type {
            type app-proto-type;
            description "Protocol type.";
          }
        }  // list host-proto-type
      }  // container host-proto-types

      container icmp-stats {
        config false;
        description
          "Statistics of collection of statistics on ICMP packets.";
        leaf in-bad-fmt {
          type uint32;
          description
            "Count of received ICMP packets whose formats are incorrect.";
        }

        leaf in-bad-checksum {
          type uint32;
          description
            "Count of received packets whose checksums are incorrect.";
        }

        leaf in-echo {
          type uint32;
          description
            "Count of received ICMP echo request packets.";
        }

        leaf in-dst-unreach {
          type uint32;
          description
            "Count of received packets whose destination addresses are unreachable.";
        }

        leaf in-src-quench {
          type uint32;
          description
            "Count of received source suppression packets.";
        }

        leaf in-redirect {
          type uint32;
          description
            "Count of received redirection packets.";
        }

        leaf in-echo-reply {
          type uint32;
          description
            "Count of received echo reply packets.";
        }

        leaf in-para-err {
          type uint32;
          description
            "Count of received packets whose parameters are incorrect.";
        }

        leaf in-time-stamp {
          type uint32;
          description
            "Count of received timestamp request packets.";
        }

        leaf in-info-request {
          type uint32;
          description
            "Count of received information request packets.";
        }

        leaf in-mask-request {
          type uint32;
          description
            "Count of received mask request packets.";
        }

        leaf in-mask-reply {
          type uint32;
          description
            "Count of received mask request response packets.";
        }

        leaf in-time-exceed {
          type uint32;
          description
            "Count of received ICMP timeout error packets.";
        }

        leaf out-echo {
          type uint32;
          description
            "Count of sent echo request packets.";
        }

        leaf out-dst-unreach {
          type uint32;
          description
            "Count of sent destination-unreachable packets.";
        }

        leaf out-src-quench {
          type uint32;
          description
            "Count of sent source suppression packets.";
        }

        leaf out-redirect {
          type uint32;
          description
            "Count of sent redirection packets.";
        }

        leaf out-echo-reply {
          type uint32;
          description
            "Count of sent echo reply packets.";
        }

        leaf out-para-err {
          type uint32;
          description
            "Count of sent packets whose parameters are incorrect.";
        }

        leaf out-time-stamp {
          type uint32;
          description
            "Count of sent timestamp request packets.";
        }

        leaf out-info-request {
          type uint32;
          description
            "Count of sent information request packets.";
        }

        leaf out-mask-request {
          type uint32;
          description
            "Count of sent mask request packets.";
        }

        leaf out-mask-reply {
          type uint32;
          description
            "Count of sent mask request response packets.";
        }

        leaf out-time-exceed {
          type uint32;
          description
            "Count of sent ICMP timeout error packets.";
        }

        leaf in-icmp-sum {
          type uint32;
          description
            "Count of received ICMP packets.";
        }

        leaf in-icmp-err {
          type uint32;
          description
            "Count of received ICMP packets whose headers are incorrect.";
        }

        leaf out-icmp-sum {
          type uint32;
          description
            "Count of sent ICMP packets.";
        }

        leaf out-icmp-err {
          type uint32;
          description
            "Count of sent incorrect ICMP packets.";
        }

        leaf in-mping-request {
          type uint32;
          description
            "Count of received mping request packets.";
        }

        leaf out-mping-request {
          type uint32;
          description
            "Count of sent mping request packets.";
        }

        leaf in-mping-reply {
          type uint32;
          description
            "Count of received mping reply packets.";
        }

        leaf out-mping-reply {
          type uint32;
          description
            "Count of sent mping reply packets.";
        }

        leaf in-time-stamp-rep {
          type uint32;
          description
            "Count of received timestamp reply packets.";
        }

        leaf out-time-stamp-rep {
          type uint32;
          description
            "Count of sent timestamp reply packets.";
        }
      }  // container icmp-stats

      container ip-stats {
        config false;
        description
          "Statistics of IP packets.";
        leaf in-sum {
          type uint32;
          description
            "Total count of received packets.";
        }

        leaf in-local {
          type uint32;
          description
            "Total count of packets that are received locally.";
        }

        leaf in-bad-proto {
          type uint32;
          description
            "Count of received packets whose protocols are unknown.";
        }

        leaf in-bad-opt {
          type uint32;
          description
            "Count of received packets whose options are unknown.";
        }

        leaf in-discard-srr {
          type uint32;
          description
            "Count of packets that discard source route options.";
        }

        leaf in-discard-rr {
          type uint32;
          description
            "Count of packets that discard route record options.";
        }

        leaf in-discard-ra {
          type uint32;
          description
            "Count of packets that discard route alert options.";
        }

        leaf in-discard-ts {
          type uint32;
          description
            "Count of packets that discard time stamp options.";
        }

        leaf in-ttl-exceed {
          type uint32;
          description
            "Count of received TTL timeout packets.";
        }

        leaf out-fwd {
          type uint32;
          description
            "Count of forwarded packets.";
        }

        leaf out-no-route {
          type uint32;
          description
            "Count of packets without routes.";
        }

        leaf frag-dropped {
          type uint32;
          description
            "Count of discarded packet fragments.";
        }

        leaf reass-sum {
          type uint32;
          description
            "Count of reassembled packet fragments.";
        }

        leaf reass-timeouts {
          type uint32;
          description
            "Count of packet fragments whose reassembly times out.";
        }

        leaf in-bad-fmt {
          type uint32;
          description
            "Count of received packets whose formats are incorrect.";
        }

        leaf in-bad-checksum {
          type uint32;
          description
            "Count of received packets whose checksums are incorrect.";
        }

        leaf out-local {
          type uint32;
          description
            "Count of packets that are sent locally.";
        }

        leaf out-dropped {
          type uint32;
          description
            "Count of discarded packets.";
        }

        leaf frag-output {
          type uint32;
          description
            "Count of sent packet fragments.";
        }

        leaf pkt-fraged {
          type uint32;
          description
            "Count of fragmented packets.";
        }

        leaf frag-forbid {
          type uint32;
          description
            "Count of packets whose fragmenting is prohibited.";
        }

        leaf frag-input {
          type uint32;
          description
            "Count of received packet fragments.";
        }

        leaf in-hdr-err {
          type uint32;
          description
            "Count of received packets whose headers are incorrect.";
        }
      }  // container ip-stats
    }  // container pp4

    rpc reset-ip-stats {
      ext:node-ref "/pp4/ip-stats";
      description
        "Clear IP packets statistics of interfaces.";
      input {
        leaf if-name {
          type leafref {
            path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
          }
          description
            "Clear IP packets statistics based on the interface name.";
        }
      }
    }  // rpc reset-ip-stats
  }  // module huawei-pp4