module ping {
  namespace "urn:opendaylight:ping";
  prefix ping;
  import ietf-inet-types {prefix inet;}
  revision "2013-09-11" {
    description "TCP ping module";
  }
  rpc send-echo {
    description "Send TCP ECHO request";
    input {
      leaf destination {
        type inet:ipv4-address;
      }
    }
    output {
      leaf echo-result {
        type enumeration {
          enum "reachable" {
            value 0;
            description "Received reply";
          }
          enum "unreachable" {
            value 1;
            description "No reply during timeout";
          }
          enum "error" {
            value 2;
            description "Error happened";
          }
        }
        description "Result types";
      }
    }
  }
}