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/* RLC Window (common for both UL/DL TBF), 3GPP TS 44.060
*
* Copyright (C) 2012 Ivan Klyuchnikov
* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
* Copyright (C) 2023 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
*
* 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.
*/
#pragma once
#include <stdint.h>
#include "rlc.h"
#define RLC_GPRS_WS 64 /* max window size */
#define RLC_EGPRS_MIN_WS 64 /* min window size */
#define RLC_EGPRS_MAX_WS 1024 /* min window size */
#define RLC_EGPRS_MAX_BSN_DELTA 512
#define RLC_MAX_WS RLC_EGPRS_MAX_WS
class gprs_rlc_window {
public:
gprs_rlc_window();
const uint16_t mod_sns(void) const;
const uint16_t mod_sns(uint16_t bsn) const;
const uint16_t sns(void) const;
const uint16_t ws(void) const;
void set_sns(uint16_t sns);
void set_ws(uint16_t ws);
protected:
uint16_t m_sns;
uint16_t m_ws;
};
inline gprs_rlc_window::gprs_rlc_window(void)
: m_sns(RLC_GPRS_SNS)
, m_ws(RLC_GPRS_WS)
{
}
inline const uint16_t gprs_rlc_window::sns(void) const
{
return m_sns;
}
inline const uint16_t gprs_rlc_window::ws(void) const
{
return m_ws;
}
inline const uint16_t gprs_rlc_window::mod_sns(void) const
{
return sns() - 1;
}
inline const uint16_t gprs_rlc_window::mod_sns(uint16_t bsn) const
{
return bsn & mod_sns();
}
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