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/*
* Copyright (C) 2013 by Holger Hans Peter Freyther
*
* 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.
*/
#pragma once
#include "gprs_rlcmac.h"
#include <stdint.h>
struct gprs_rlcmac_tbf {
struct llist_head list;
enum gprs_rlcmac_tbf_state state;
uint32_t state_flags;
enum gprs_rlcmac_tbf_direction direction;
uint8_t tfi;
uint32_t tlli;
uint8_t tlli_valid;
uint8_t trx;
uint16_t arfcn;
uint8_t tsc;
uint8_t first_ts; /* first TS used by TBF */
uint8_t first_common_ts; /* first TS that the phone can send and
reveive simultaniously */
uint8_t control_ts; /* timeslot control messages and polling */
uint8_t ms_class;
struct gprs_rlcmac_pdch *pdch[8]; /* list of PDCHs allocated to TBF */
uint16_t ta;
uint8_t llc_frame[LLC_MAX_LEN]; /* current DL or UL frame */
uint16_t llc_index; /* current write/read position of frame */
uint16_t llc_length; /* len of current DL LLC_frame, 0 == no frame */
struct llist_head llc_queue; /* queued LLC DL data */
enum gprs_rlcmac_tbf_dl_ass_state dl_ass_state;
enum gprs_rlcmac_tbf_ul_ass_state ul_ass_state;
enum gprs_rlcmac_tbf_ul_ack_state ul_ack_state;
enum gprs_rlcmac_tbf_poll_state poll_state;
uint32_t poll_fn; /* frame number to poll */
uint16_t ws; /* window size */
uint16_t sns; /* sequence number space */
/* Please note that all variables here will be reset when changing
* from WAIT RELEASE back to FLOW state (re-use of TBF).
* All states that need reset must be in this struct, so this is why
* variables are in both (dl and ul) structs and not outside union.
*/
union {
struct {
uint16_t bsn; /* block sequence number */
uint16_t v_s; /* send state */
uint16_t v_a; /* ack state */
char v_b[RLC_MAX_SNS/2]; /* acknowledge state array */
int32_t tx_counter; /* count all transmitted blocks */
char imsi[16]; /* store IMSI for PCH retransmission */
uint8_t wait_confirm; /* wait for CCCH IMM.ASS cnf */
} dl;
struct {
uint16_t bsn; /* block sequence number */
uint16_t v_r; /* receive state */
uint16_t v_q; /* receive window state */
char v_n[RLC_MAX_SNS/2]; /* receive state array */
int32_t rx_counter; /* count all received blocks */
uint8_t n3103; /* N3103 counter */
uint8_t usf[8]; /* list USFs per PDCH (timeslot) */
uint8_t contention_resolution_done; /* set after done */
uint8_t final_ack_sent; /* set if we sent final ack */
} ul;
} dir;
uint8_t rlc_block[RLC_MAX_SNS/2][RLC_MAX_LEN]; /* block history */
uint8_t rlc_block_len[RLC_MAX_SNS/2]; /* block len of history */
uint8_t n3105; /* N3105 counter */
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 */
struct {
char imsi[16];
struct timeval dl_bw_tv; /* timestamp for dl bw calculation */
uint32_t dl_bw_octets; /* number of octets since bw_tv */
struct timeval rssi_tv; /* timestamp for rssi calculation */
int32_t rssi_sum; /* sum of rssi values */
int rssi_num; /* number of rssi values added since rssi_tv */
struct timeval dl_loss_tv; /* timestamp for loss calculation */
uint16_t dl_loss_lost; /* sum of lost packets */
uint16_t dl_loss_received; /* sum of received packets */
} meas;
uint8_t cs; /* current coding scheme */
#ifdef DEBUG_DIAGRAM
int diag; /* number where TBF is presented in diagram */
int diag_new; /* used to format output of new TBF */
#endif
};
/* dispatch Unitdata.DL messages */
int tbf_handle(struct gprs_rlcmac_bts *bts,
const uint32_t tlli, const char *imsi, const uint8_t ms_class,
const uint16_t delay_csec, const uint8_t *data, const uint16_t len);
struct gprs_rlcmac_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts,
int8_t use_trx, uint8_t ms_class,
uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf);
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