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/* gprs_rlcmac.h
*
* Copyright (C) 2012 Ivan Klyuchnikov
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef GPRS_RLCMAC_H
#define GPRS_RLCMAC_H
#include <bitvector.h>
#include <gsm_rlcmac.h>
#include <gsm_timer.h>
extern "C" {
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/timer.h>
}
enum gprs_rlcmac_tbf_state {
GPRS_RLCMAC_WAIT_DATA_SEQ_START,
GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK,
GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ
};
enum gprs_rlcmac_tbf_direction {
GPRS_RLCMAC_DL_TBF,
GPRS_RLCMAC_UL_TBF
};
struct gprs_rlcmac_tbf {
struct llist_head list;
enum gprs_rlcmac_tbf_state state;
enum gprs_rlcmac_tbf_direction direction;
uint8_t tfi;
uint32_t tlli;
uint8_t rlc_data[60];
uint16_t data_index;
uint8_t bsn;
struct osmo_timer_list timer;
unsigned int T; /* Txxxx number */
unsigned int num_T_exp; /* number of consecutive T expirations */
struct osmo_gsm_timer_list gsm_timer;
unsigned int fT; /* fTxxxx number */
unsigned int num_fT_exp; /* number of consecutive fT expirations */
};
extern struct llist_head gprs_rlcmac_tbfs;
int tfi_alloc();
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi);
static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi);
static struct gprs_rlcmac_tbf *tbf_by_tlli(uint8_t tlli);
static void tbf_free(struct gprs_rlcmac_tbf *tbf);
/* TS 44.060 Section 10.4.7 Table 10.4.7.1: Payload Type field */
enum gprs_rlcmac_block_type {
GPRS_RLCMAC_DATA_BLOCK = 0x0,
GPRS_RLCMAC_CONTROL_BLOCK = 0x1,
GPRS_RLCMAC_CONTROL_BLOCK_OPT = 0x2,
GPRS_RLCMAC_RESERVED = 0x3
};
void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block);
void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block);
int gprs_rlcmac_rcv_data_block(bitvec *rlc_block);
int gprs_rlcmac_rcv_control_block(bitvec *rlc_block);
void gprs_rlcmac_rcv_block(bitvec *rlc_block);
int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, uint16_t ta);
void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t tfi, uint8_t *pdu, int start_index, int end_index, uint8_t bsn, uint8_t fbi);
int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf);
void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf);
void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf);
#endif // GPRS_RLCMAC_H
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