115 lines
2.5 KiB
C++
115 lines
2.5 KiB
C++
/* Copied from tbf.cpp
|
|
*
|
|
* Copyright (C) 2012 Ivan Klyuchnikov
|
|
* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
|
|
* 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.
|
|
*/
|
|
|
|
#include <tbf.h>
|
|
#include <bts.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
extern "C" {
|
|
#include <osmocom/core/msgb.h>
|
|
}
|
|
|
|
/* reset LLC frame */
|
|
void gprs_llc::reset()
|
|
{
|
|
m_index = 0;
|
|
m_length = 0;
|
|
}
|
|
|
|
void gprs_llc::reset_frame_space()
|
|
{
|
|
m_index = 0;
|
|
}
|
|
|
|
void gprs_llc::enqueue(struct msgb *llc_msg)
|
|
{
|
|
msgb_enqueue(&queue, llc_msg);
|
|
}
|
|
|
|
void gprs_llc::put_frame(const uint8_t *data, size_t len)
|
|
{
|
|
/* only put frames when we are empty */
|
|
OSMO_ASSERT(m_index == 0 && m_length == 0);
|
|
append_frame(data, len);
|
|
}
|
|
|
|
void gprs_llc::append_frame(const uint8_t *data, size_t len)
|
|
{
|
|
/* TODO: bounds check */
|
|
memcpy(frame + m_length, data, len);
|
|
m_length += len;
|
|
}
|
|
|
|
void gprs_llc::clear(BTS *bts)
|
|
{
|
|
struct msgb *msg;
|
|
|
|
while ((msg = msgb_dequeue(&queue))) {
|
|
bts->llc_dropped_frame();
|
|
msgb_free(msg);
|
|
}
|
|
}
|
|
|
|
void gprs_llc::init()
|
|
{
|
|
INIT_LLIST_HEAD(&queue);
|
|
reset();
|
|
}
|
|
|
|
struct msgb *gprs_llc::dequeue()
|
|
{
|
|
return msgb_dequeue(&queue);
|
|
}
|
|
|
|
|
|
void gprs_llc::calc_pdu_lifetime(BTS *bts, const uint16_t pdu_delay_csec, struct timeval *tv)
|
|
{
|
|
uint16_t delay_csec;
|
|
if (bts->bts_data()->force_llc_lifetime)
|
|
delay_csec = bts->bts_data()->force_llc_lifetime;
|
|
else
|
|
delay_csec = pdu_delay_csec;
|
|
|
|
/* keep timestap at 0 for infinite delay */
|
|
if (delay_csec == 0xffff) {
|
|
memset(tv, 0, sizeof(*tv));
|
|
return;
|
|
}
|
|
|
|
/* calculate timestamp of timeout */
|
|
struct timeval now, csec;
|
|
gettimeofday(&now, NULL);
|
|
csec.tv_usec = (delay_csec % 100) * 10000;
|
|
csec.tv_sec = delay_csec / 100;
|
|
|
|
timeradd(&now, &csec, tv);
|
|
}
|
|
|
|
bool gprs_llc::is_frame_expired(struct timeval *tv_now, struct timeval *tv)
|
|
{
|
|
/* Timeout is infinite */
|
|
if (tv->tv_sec == 0 && tv->tv_usec == 0)
|
|
return false;
|
|
|
|
return timercmp(tv_now, tv, >);
|
|
}
|