import "protocol.proto"; package OstProto; message Payload { enum DataPatternMode { e_dp_fixed_word = 0; e_dp_inc_byte = 1; e_dp_dec_byte = 2; e_dp_random = 3; } // Data Pattern optional DataPatternMode pattern_mode = 1; optional uint32 pattern = 2; //optional uint32 data_start_ofs = 13; } extend Protocol { optional Payload payload = 52; }