yang - nemask fields

 module opendaylight-netmask-fields {
     namespace "urn:opendaylight:netmask:fields";
     prefix "netmask";

     import ietf-inet-types {prefix inet; revision-date "2010-09-24";}
     import ietf-yang-types {prefix yang; revision-date "2013-07-15";}
     import opendaylight-inventory {prefix inv;revision-date "2013-08-19";}
     import opendaylight-match-types {prefix match; revision-date "2013-10-26"; }


     revision "2016-01-29" {
         description "Initial revision of netmask fields";
     }

    grouping "ipv4-match-netmask-fields" {
        leaf ipv4-source-address {
            description "IPv4 source address without arbitrary subnet mask.";
            type inet:ipv4-address;
        }

        leaf ipv4-destination-address {
            description "IPv4 destination address without arbitrary subnet mask.";
            type inet:ipv4-address;
        }

        leaf ipv4-source-netmask{
            description "IPv4 source arbitrary subnet mask.";
            type yang:dotted-quad;
        }

        leaf ipv4-destination-netmask{
            description "IPv4 destination arbitrary subnet mask.";
            type yang:dotted-quad;
        }
    }

    augment "/match:match/match:layer-3-match/match:ipv4-match" {
            ext:augment-identifier "12345";
            description "Adding ip-address with netmask fields into ipv4 match ";
            uses ipv4-match-netmask-fields;
     }
 }