module Cisco-IOS-XR-um-tcp-cfg {

    yang-version 1;

    namespace
      "http://cisco.com/ns/yang/Cisco-IOS-XR-um-tcp-cfg";

    prefix um-tcp-cfg;

    import Cisco-IOS-XR-types {
      prefix xr;
    }
    import cisco-semver {
      prefix semver;
    }

    organization "Cisco Systems, Inc.";

    contact
      "Cisco Systems, Inc.
     Customer Service
     
     Postal: 170 West Tasman Drive
     San Jose, CA 95134
     
     Tel: +1 800 553-NETS
     
     E-mail: cs-yang@cisco.com";

    description
      "This module contains a collection of YANG definitions
     for Cisco IOS-XR tcp package configuration.
     
     This YANG module augments the
     modules with configuration data.
     
     Copyright (c) 2021 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2021-05-10" {
      description "Initial release";
    }

    semver:module-version "1.0.0";

    feature tcpao_keychain_key_parse_verify {
      description
        "tcpao keychain key parse verify";
    }

    container service {
      description
        "Modify use of network based services";
      container ipv4 {
        description "Ipv4 small servers";
        container tcp-small-servers {
          description
            "Enable small TCP servers (e.g., ECHO)";
          leaf max-servers {
            type union {
              type enumeration {
                enum "no-limit" {
                  value 0;
                  description
                    "No limit to number of allowable TCP small servers";
                }
              }
              type uint32 {
                range "1..2147483647";
              }
            }
            description
              "Set number of allowable TCP small servers";
          }

          leaf access-list {
            type xr:Cisco-ios-xr-string {
              length "1..64";
            }
            must "../max-servers";
            description "Access list";
          }
        }  // container tcp-small-servers
      }  // container ipv4

      container ipv6 {
        description "Ipv6 small servers";
        container tcp-small-servers {
          description
            "Enable small TCP servers (e.g., ECHO)";
          leaf max-servers {
            type union {
              type enumeration {
                enum "no-limit" {
                  value 0;
                  description
                    "No limit to number of allowable TCP small servers";
                }
              }
              type uint32 {
                range "1..2147483647";
              }
            }
            description
              "Set number of allowable TCP small servers";
          }

          leaf access-list {
            type xr:Cisco-ios-xr-string {
              length "1..64";
            }
            must "../max-servers";
            description "Access list";
          }
        }  // container tcp-small-servers
      }  // container ipv6
    }  // container service

    container tcp {
      description
        "Global TCP configuration commands";
      leaf window-size {
        type uint32 {
          range "2048..65535";
        }
        description
          "TCP receive window size";
      }

      leaf synwait-time {
        type uint32 {
          range "5..30";
        }
        description
          "Set time to wait on new TCP connections";
      }

      container directory {
        description
          "Specify debug directory location";
        leaf location {
          type string {
            length "1..256";
          }
          must "../files and ../size";
          description
            "Place debug files in this directory";
        }

        leaf files {
          type uint32 {
            range "1..10000";
          }
          must "../location and ../size";
          description
            "Set maximum debug files";
        }

        leaf size {
          type uint32 {
            range "1024..4294967295";
          }
          must "../location and ../files";
          description
            "Set maximum file size";
        }
      }  // container directory

      container path-mtu-discovery {
        presence
          "Indicates a path-mtu-discovery node is configured.";
        description
          "Enable Path MTU Discovery on new TCP connections";
        leaf age-timer {
          type union {
            type uint32 {
              range "10..30";
            }
            type enumeration {
              enum "infinite" {
                value 0;
                description
                  "Disable Path MTU aging timer";
              }
            }
          }
          description
            "Set Path MTU aging timer";
        }
      }  // container path-mtu-discovery

      leaf receive-queue {
        type uint32 {
          range "40..800";
        }
        description
          "TCP receive packet queue size";
      }

      container timestamp {
        presence
          "Indicates a timestamp node is configured.";
        description
          "Enable TCP timestamp option";
      }  // container timestamp

      leaf throttle {
        type uint32 {
          range "0..100";
        }
        must "../high-water-mark-throttling";
        description
          "Throttle receive buffer (in percentage)";
      }

      leaf high-water-mark-throttling {
        type uint32 {
          range "0..100";
        }
        must "../throttle";
        description
          "High water mark throttling (default 70 percent)";
      }

      container selective-ack {
        presence
          "Indicates a selective-ack node is configured.";
        description
          "Enable TCP selective-ACK";
      }  // container selective-ack

      leaf mss {
        type uint32 {
          range "68..10000";
        }
        description
          "Set the TCP initial maximum segment size";
      }

      leaf accept-rate {
        type uint32 {
          range "1..1000";
        }
        description
          "Set the maximum TCP connection accept rate";
      }

      leaf num-thread {
        type uint32 {
          range "1..16";
        }
        must "../max-threads-in-thread-pool";
        description
          "Set number of threads (takes effect only on process restart)";
      }

      leaf max-threads-in-thread-pool {
        type uint32 {
          range "1..16";
        }
        must "../num-thread";
        description
          "max threads in thread pool created by TCP (default: 8)";
      }

      container ao {
        presence
          "Indicates a ao node is configured.";
        description
          "Enter into TCP authentication option configuration mode";
        container keychains {
          description "TCP AO keychain mode";
          list keychain {
            key "keychain-name";
            description
              "TCP AO keychain mode";
            leaf keychain-name {
              type xr:Cisco-ios-xr-string {
                length "1..32";
              }
              description
                "TCP AO keychain mode";
            }

            container keys {
              description
                "Configure TCP-AO IDs for a Key";
              list key {
                if-feature tcpao_keychain_key_parse_verify;
                key "key-name";
                description
                  "Configure TCP-AO IDs for a Key";
                leaf key-name {
                  type xr:Cisco-ios-xr-string {
                    length "1..800";
                    pattern "[0-9]{1,15}";
                  }
                  description
                    "Configure TCP-AO IDs for a Key";
                }

                leaf send-id {
                  type uint32 {
                    range "0..255";
                  }
                  mandatory true;
                  description
                    "Configure SendID to be used for this key";
                }

                leaf receive-id {
                  type uint32 {
                    range "0..255";
                  }
                  mandatory true;
                  description
                    "Configure ReceiveID to be used for this key";
                }
              }  // list key
            }  // container keys
          }  // list keychain
        }  // container keychains
      }  // container ao
    }  // container tcp

    container pak-rate {
      description
        "packet rate of the process";
      container tcp {
        description
          "input pak-rate of tcp protocol";
        container stats-start {
          presence
            "Indicates a stats-start node is configured.";
          description
            "packet rate stats collection start/stop";
          leaf rate-limit {
            type uint32 {
              range "3000..65535";
            }
            description
              "Specify the expected packet rate in 30 secs/session";
          }

          leaf max-pkt-size {
            type uint32 {
              range "1000..9000";
            }
            must "../max-pkt-rate";
            description
              "Specify the expected packet maximum size of the packet";
          }

          leaf max-pkt-rate {
            type uint32 {
              range "2000..65535";
            }
            must "../max-pkt-size";
            description
              "Specify the expected maximum size packets in 30 secs/session";
          }
        }  // container stats-start
      }  // container tcp
    }  // container pak-rate
  }  // module Cisco-IOS-XR-um-tcp-cfg