package protocol;


message fsp_header {
        optional uint32 version = 1;
        optional uint32 type = 2;
        optional uint32 xid = 4;
}

enum fsp_type {
     // Discovery and maintenance messages
     FSPT_HELLO = 0;
     FSPT_ECHO_REQUEST = 1;
     FSPT_ECHO_REPLY = 2;
     FSPT_RLC_DATA_REQ = 3;
     FSPT_RLC_DATA_REQ_ACK = 4;
     FSPT_PDCP_DATA_IND = 5;
     FSPT_PDCP_DATA_IND_ACK = 6;
}

enum f1u_type {
     // Discovery and maintenance messages
     F1U_DL_DATA = 0;
     F1U_DL_STATUS = 1;
}


message f1u_message{
     optional flexsplit_direction msg_dir = 100;
     oneof msg{
	dl_user_data dl_data = 1;
        dl_data_delivery_status dl_status = 2;
     }
}



message flexsplit_message {
     optional flexsplit_direction msg_dir = 100;
	oneof msg {
              fsp_hello hello_msg = 1;
              fsp_echo_request echo_request_msg = 2;
              fsp_echo_reply echo_reply_msg = 3;
              fspRlcDataReq data_req_msg = 4;
	      fspRlcDataReqAck data_req_ack = 5;
	      fspPdcpDataInd data_ind_msg = 6;
	      fspPdcpDataIndAck data_ind_ack = 7;
	}
}

enum flexsplit_direction {
     //option allow_alias = true;
     NOT_SET = 0;
     INITIATING_MESSAGE = 1;
     SUCCESSFUL_OUTCOME=2;
     UNSUCCESSFUL_OUTCOME=3;	
}

enum flexsplit_err {
	// message errors
	NO_ERR = 0;	
	MSG_DEQUEUING = -1;
	MSG_ENQUEUING = -2;
	MSG_DECODING = -3;
	MSG_ENCODING = -4;
	MSG_BUILD = -5;
	MSG_NOT_SUPPORTED = -6; 
	MSG_NOT_HANDLED = -7;
	MSG_NOT_VALIDATED = -8;
	MSG_OUT_DATED = -9;
	
	// other erros
	UNEXPECTED = -100;	
}

message fsp_ctxt {
        optional uint32 fsp_mod_id = 1;
        optional bool fsp_enb_flag = 2;
        optional uint32 fsp_instance = 3;
        optional uint32 fsp_rnti = 4;
        optional uint32 fsp_frame = 5;
        optional uint32 fsp_subframe = 6;
        optional uint32 fsp_eNB_index = 7;

}

message fspRlcPdu {
        optional bytes fsp_pdu_data = 1; // Maximum PDU to be transfered
}

message fspRlcData {
        optional fsp_ctxt fsp_ctxt = 1;
        optional bool fsp_srb_flag = 2;
        optional bool fsp_mbms_flag = 3;
        optional uint32 fsp_rb_id = 4;
        optional uint32 fsp_muip = 5;
        optional uint32 fsp_confirm = 6;
        optional int32 fsp_sdu_buffer_size = 7;
        optional fspRlcPdu fsp_pdu = 8;
}

//
// Maintenance and discovery messages
//

message fsp_hello {
      optional fsp_header header = 1;
}

message fsp_echo_request {
        optional fsp_header header = 1;
//        extensions 100 to 199;
}


message fsp_echo_reply {
        optional fsp_header header = 1;
//        extensions 100 to 199;
}


message fspRlcDataReq {
        optional fsp_header header = 1;
	optional uint32 eNB_id = 2;
        optional fspRlcData pdcp_data = 3;
}

message fspRlcDataReqAck {
	optional fsp_header header = 1;
	optional uint32 result = 2;
}

message fspPdcpDataInd {
        optional fsp_header header = 1;
	optional uint32 eNB_id = 2;
        optional fspRlcData rlc_data = 3;
}

message fspPdcpDataIndAck {
        optional fsp_header header = 1;
	optional uint32 result = 2;
}

message dl_data_header {
        required uint32 fields = 1;
}

message dl_user_data {
	required dl_data_header header = 1;
	required bytes pdu = 2;
	required uint32 frame = 3;
	required uint32 subframe = 4;
	required uint32 rnti = 5;
}


message dl_data_delivery_status {
	required dl_data_header header = 1;
	required bytes pdu = 2;
	required uint32 frame = 3;
	required uint32 subframe = 4;
	required uint32 rnti = 5;
}