Services.proto

package directoryd;

enum RequestType { REGISTER = 1; UNREGISTER = 2; FIND = 3; HEARTBEAT = 4; }
message TxtField {
    required string key = 1;
    required string value = 2;
}

message ServiceRequest {
    message Register {
	message Location {
	    required string type = 1;
	    optional int32 port = 2;
	    optional string resource = 3;
	}
	required string name = 1;
	repeated Location location = 2;
	repeated TxtField txt = 3;
    }

    message Unregister {
	required string name = 1;
    }

    message Find {
	required string type = 1;
	optional string name = 2;
	repeated TxtField txt = 3;
    }

    // Identifies which field is filled in.
    required RequestType type = 1 [ default = HEARTBEAT ];

    // One of the following may be filled in.
    optional Register register = 2;
    optional Unregister unregister = 3;
    optional Find find = 4;
}

message ServiceReply {
    message FindResult {
	message Location {
	    optional string address = 1;
	    optional int32 port = 2;
	    optional string resource = 3;
	}
	required Location location = 1;
	repeated TxtField txt = 2;
    }

    required RequestType type = 1;
    required bool success = 2 [ default = true ];
    optional string result = 3;
    repeated FindResult findresult = 4;
}