module interface-statistics {
    namespace "urn:opendaylight:vpnservice:interface:statistics";
    prefix if-stats;

    import ietf-interfaces {
        prefix if;
    }

    revision "2015-08-24" {
        description "YANG model describes rpc to retrieve the different ingress/egress statistics ie. packet/byte counts";
    }

     typedef result-code {
        type enumeration {
             enum not-found;
             enum success;
             enum incomplete;
         }
    }

    grouping service-enitity-statistics {
        leaf packet-tx-count {
            type uint32;
        }
        leaf packet-rx-count {
            type uint32;
        }
        leaf byte-tx-count {
            type uint32;
        }
        leaf byte-rx-count {
            type uint32;
        }
    }

    grouping stat-reply {
        leaf stat-result-code {
            type result-code;
        }
        uses service-enitity-statistics;
    }

    rpc get-interface-statistics {
        input {
            leaf interface-name {
                type leafref {
                    path "/if:interfaces/if:interface/if:name";
                }
            }
        }
        output {
            container stat-result {
                uses stat-reply;
            }
        }
    }

}