71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* RLC Window as per 3GPP TS 44.060 */
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/*
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* (C) 2012 Ivan Klyuchnikov
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* (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
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* (C) 2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <osmocom/core/utils.h>
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#include <osmocom/gprs/rlcmac/rlc.h>
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#include <osmocom/gprs/rlcmac/rlc_window.h>
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void gprs_rlcmac_rlc_window_constructor(struct gprs_rlcmac_rlc_window *w)
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{
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w->sns = RLC_GPRS_SNS;
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w->ws = GPRS_RLCMAC_GPRS_WS;
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}
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void gprs_rlcmac_rlc_window_destructor(struct gprs_rlcmac_rlc_window *w)
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{
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/* Nothing to be done here yet */
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}
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uint16_t gprs_rlcmac_rlc_window_mod_sns(const struct gprs_rlcmac_rlc_window *w)
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{
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return gprs_rlcmac_rlc_window_sns(w) - 1;
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}
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uint16_t gprs_rlcmac_rlc_window_mod_sns_bsn(const struct gprs_rlcmac_rlc_window *w, uint16_t bsn)
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{
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return bsn & gprs_rlcmac_rlc_window_mod_sns(w);
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}
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uint16_t gprs_rlcmac_rlc_window_sns(const struct gprs_rlcmac_rlc_window *w)
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{
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return w->sns;
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}
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uint16_t gprs_rlcmac_rlc_window_ws(const struct gprs_rlcmac_rlc_window *w)
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{
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return w->ws;
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}
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void gprs_rlcmac_rlc_window_set_sns(struct gprs_rlcmac_rlc_window *w, uint16_t sns)
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{
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OSMO_ASSERT(sns >= RLC_GPRS_SNS);
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OSMO_ASSERT(sns <= RLC_MAX_SNS);
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/* check for 2^n */
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OSMO_ASSERT((sns & (-sns)) == sns);
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w->sns = sns;
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}
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void gprs_rlcmac_rlc_window_set_ws(struct gprs_rlcmac_rlc_window *w, uint16_t ws)
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{
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OSMO_ASSERT(ws >= RLC_GPRS_SNS/2);
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OSMO_ASSERT(ws <= RLC_MAX_SNS/2);
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w->ws = ws;
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}
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