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/* poll_controller.h
*
* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
* Copyright (C) 2013 by Holger Hans Peter Freyther
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 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 Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <poll_controller.h>
#include <bts.h>
#include <tbf.h>
PollController::PollController(BTS& bts)
: m_bts(bts)
{}
void PollController::expireTimedout(int frame_number)
{
struct gprs_rlcmac_bts *bts = m_bts.bts_data();
struct gprs_rlcmac_dl_tbf *dl_tbf;
struct gprs_rlcmac_ul_tbf *ul_tbf;
struct gprs_rlcmac_sba *sba, *sba2;
struct llist_pods *lpods;
uint32_t elapsed;
/* check for poll timeout
* The UL frame numbers lag 3 behind the DL frames and the data
* indication is only sent after all 4 frames of the block have been
* received. Sometimes there is an idle frame between the end of one
* and start of another frame (every 3 blocks). So the timeout should
* definitely be there if we're more than 8 frames past poll_fn. Let's
* stay on the safe side and say 13 or more. */
llist_pods_for_each_entry(ul_tbf, &bts->ul_tbfs, list, lpods) {
if (ul_tbf->poll_state == GPRS_RLCMAC_POLL_SCHED) {
elapsed = (frame_number + 2715648 - ul_tbf->poll_fn)
% 2715648;
if (elapsed >= 13 && elapsed < 2715400)
ul_tbf->poll_timeout();
}
}
llist_pods_for_each_entry(dl_tbf, &bts->dl_tbfs, list, lpods) {
if (dl_tbf->poll_state == GPRS_RLCMAC_POLL_SCHED) {
elapsed = (frame_number + 2715648 - dl_tbf->poll_fn)
% 2715648;
if (elapsed >= 13 && elapsed < 2715400)
dl_tbf->poll_timeout();
}
}
llist_for_each_entry_safe(sba, sba2, &m_bts.sba()->m_sbas, list) {
elapsed = (frame_number + 2715648 - sba->fn) % 2715648;
if (elapsed >= 13 && elapsed < 2715400) {
/* sba will be freed here */
m_bts.sba()->timeout(sba);
}
}
}
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