1143 lines
29 KiB
C++
1143 lines
29 KiB
C++
/* Copied from gprs_bssgp_pcu.cpp
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*
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* Copyright (C) 2012 Ivan Klyuchnikov
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* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
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* Copyright (C) 2013 by Holger Hans Peter Freyther
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <bts.h>
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#include <tbf.h>
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#include <rlc.h>
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#include <encoding.h>
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#include <gprs_rlcmac.h>
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#include <gprs_debug.h>
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#include <gprs_bssgp_pcu.h>
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#include <gprs_ms.h>
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#include <decoding.h>
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extern "C" {
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/talloc.h>
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}
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#include <errno.h>
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#include <string.h>
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extern void *tall_pcu_ctx;
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static void tbf_timer_cb(void *_tbf);
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gprs_rlcmac_tbf::Meas::Meas() :
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rssi_sum(0),
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rssi_num(0)
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{
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timerclear(&rssi_tv);
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}
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gprs_rlcmac_tbf::gprs_rlcmac_tbf(BTS *bts_, gprs_rlcmac_tbf_direction dir) :
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state_flags(0),
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direction(dir),
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trx(NULL),
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first_ts(0),
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first_common_ts(0),
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control_ts(0xff),
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dl_ass_state(GPRS_RLCMAC_DL_ASS_NONE),
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ul_ass_state(GPRS_RLCMAC_UL_ASS_NONE),
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ul_ack_state(GPRS_RLCMAC_UL_ACK_NONE),
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poll_state(GPRS_RLCMAC_POLL_NONE),
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poll_fn(0),
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n3105(0),
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T(0),
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num_T_exp(0),
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fT(0),
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num_fT_exp(0),
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state(GPRS_RLCMAC_NULL),
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was_releasing(0),
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upgrade_to_multislot(0),
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bts(bts_),
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m_tfi(0),
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m_created_ts(0),
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m_ms(NULL),
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m_ta(0),
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m_ms_class(0),
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m_ms_list(this)
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{
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/* The classes of these members do not have proper constructors yet.
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* Just set them to 0 like talloc_zero did */
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memset(&list, 0, sizeof(list));
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memset(&pdch, 0, sizeof(pdch));
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memset(&timer, 0, sizeof(timer));
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memset(&m_rlc, 0, sizeof(m_rlc));
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memset(&gsm_timer, 0, sizeof(gsm_timer));
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m_llc.init();
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m_name_buf[0] = '\0';
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/* Back pointer for PODS llist compatibility */
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list.back = this;
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}
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gprs_rlcmac_bts *gprs_rlcmac_tbf::bts_data() const
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{
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return bts->bts_data();
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}
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uint32_t gprs_rlcmac_tbf::tlli() const
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{
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return m_ms ? m_ms->tlli() : 0;
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}
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const char *gprs_rlcmac_tbf::imsi() const
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{
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static const char nullc = 0;
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return m_ms ? m_ms->imsi() : &nullc;
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}
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void gprs_rlcmac_tbf::assign_imsi(const char *imsi_)
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{
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GprsMs *old_ms;
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if (!imsi_ || !m_ms) {
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LOGP(DRLCMAC, LOGL_ERROR,
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"%s failed to assign IMSI: missing IMSI or MS object\n",
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name());
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return;
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}
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if (strcmp(imsi_, imsi()) == 0)
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return;
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/* really change the IMSI */
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old_ms = bts->ms_store().get_ms(0, 0, imsi_);
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if (old_ms) {
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/* We cannot find m_ms by IMSI since we know that it has a
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* different IMSI */
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OSMO_ASSERT(old_ms != m_ms);
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LOGP(DRLCMAC, LOGL_INFO,
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"%s the IMSI '%s' was already assigned to another "
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"MS object: TLLI = 0x%08x, that IMSI will be removed\n",
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name(), imsi_, old_ms->tlli());
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merge_and_clear_ms(old_ms);
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}
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m_ms->set_imsi(imsi_);
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}
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uint8_t gprs_rlcmac_tbf::ta() const
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{
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return m_ms ? m_ms->ta() : m_ta;
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}
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void gprs_rlcmac_tbf::set_ta(uint8_t ta)
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{
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if (ms())
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ms()->set_ta(ta);
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m_ta = ta;
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}
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uint8_t gprs_rlcmac_tbf::ms_class() const
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{
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return m_ms ? m_ms->ms_class() : m_ms_class;
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}
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void gprs_rlcmac_tbf::set_ms_class(uint8_t ms_class_)
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{
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if (ms())
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ms()->set_ms_class(ms_class_);
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m_ms_class = ms_class_;
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}
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uint8_t gprs_rlcmac_tbf::current_cs() const
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{
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uint8_t cs;
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if (direction == GPRS_RLCMAC_UL_TBF)
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cs = m_ms ? m_ms->current_cs_ul() : bts->bts_data()->initial_cs_ul;
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else
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cs = m_ms ? m_ms->current_cs_dl() : bts->bts_data()->initial_cs_dl;
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return cs < 1 ? 1 : cs;
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}
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gprs_llc_queue *gprs_rlcmac_tbf::llc_queue()
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{
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return m_ms ? m_ms->llc_queue() : NULL;
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}
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const gprs_llc_queue *gprs_rlcmac_tbf::llc_queue() const
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{
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return m_ms ? m_ms->llc_queue() : NULL;
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}
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void gprs_rlcmac_tbf::set_ms(GprsMs *ms)
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{
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if (m_ms == ms)
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return;
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if (m_ms) {
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/* Save the TA locally. This will also be called, if the MS
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* object detaches itself from the TBF, for instance if
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* attach_tbf() is called */
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m_ta = m_ms->ta();
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m_ms->detach_tbf(this);
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}
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m_ms = ms;
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if (m_ms)
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m_ms->attach_tbf(this);
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}
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void gprs_rlcmac_tbf::merge_and_clear_ms(GprsMs *old_ms)
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{
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if (old_ms == ms())
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return;
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GprsMs::Guard guard_old(old_ms);
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/* Clean up the old MS object */
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/* TODO: Use timer? */
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if (old_ms->ul_tbf() && old_ms->ul_tbf()->T == 0) {
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if (old_ms->ul_tbf() == this) {
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LOGP(DRLCMAC, LOGL_ERROR,
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"%s is referred by the old MS "
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"and will not be deleted\n",
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name());
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set_ms(NULL);
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} else {
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tbf_free(old_ms->ul_tbf());
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}
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}
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if (old_ms->dl_tbf() && old_ms->dl_tbf()->T == 0) {
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if (old_ms->dl_tbf() == this) {
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LOGP(DRLCMAC, LOGL_ERROR,
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"%s is referred by the old MS "
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"and will not be deleted\n",
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name());
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set_ms(NULL);
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} else {
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tbf_free(old_ms->dl_tbf());
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}
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}
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ms()->merge_old_ms(old_ms);
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}
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void gprs_rlcmac_tbf::update_ms(uint32_t tlli, enum gprs_rlcmac_tbf_direction dir)
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{
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if (!ms())
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return;
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if (!tlli)
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return;
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/* TODO: When the TLLI does not match the ms, check if there is another
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* MS object that belongs to that TLLI and if yes make sure one of them
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* gets deleted. This is the same problem that can arise with
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* assign_imsi() so there should be a unified solution */
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if (!ms()->check_tlli(tlli)) {
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GprsMs *old_ms;
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old_ms = bts->ms_store().get_ms(tlli, 0, NULL);
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if (old_ms)
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merge_and_clear_ms(old_ms);
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}
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if (dir == GPRS_RLCMAC_UL_TBF)
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ms()->set_tlli(tlli);
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else
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ms()->confirm_tlli(tlli);
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}
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gprs_rlcmac_ul_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts,
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int8_t use_trx, uint8_t ms_class,
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uint32_t tlli, uint8_t ta, GprsMs *ms)
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{
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struct gprs_rlcmac_ul_tbf *tbf;
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#warning "Copy and paste with tbf_new_dl_assignment"
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/* create new TBF, use same TRX as DL TBF */
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/* use multislot class of downlink TBF */
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tbf = tbf_alloc_ul_tbf(bts, ms, use_trx, ms_class, 0);
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if (!tbf) {
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LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n");
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/* FIXME: send reject */
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return NULL;
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}
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tbf->m_contention_resolution_done = 1;
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tbf->set_state(GPRS_RLCMAC_ASSIGN);
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tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH);
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tbf_timer_start(tbf, 3169, bts->t3169, 0);
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tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF);
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OSMO_ASSERT(tbf->ms());
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tbf->ms()->set_ta(ta);
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return tbf;
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}
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static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf)
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{
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int ts;
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for (ts = 0; ts < 8; ts++) {
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if (!tbf->pdch[ts])
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continue;
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tbf->pdch[ts]->detach_tbf(tbf);
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tbf->pdch[ts] = NULL;
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}
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}
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void tbf_free(struct gprs_rlcmac_tbf *tbf)
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{
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/* Give final measurement report */
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gprs_rlcmac_rssi_rep(tbf);
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if (tbf->direction == GPRS_RLCMAC_DL_TBF) {
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gprs_rlcmac_dl_tbf *dl_tbf = static_cast<gprs_rlcmac_dl_tbf *>(tbf);
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gprs_rlcmac_lost_rep(dl_tbf);
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dl_tbf->cleanup();
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}
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LOGP(DRLCMAC, LOGL_INFO, "%s free\n", tbf_name(tbf));
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if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE)
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LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending uplink "
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"assignment. This may not happen, because the "
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"assignment message never gets transmitted. Please "
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"be sure not to free in this state. PLEASE FIX!\n",
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tbf_name(tbf));
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if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE)
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LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending downlink "
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"assignment. This may not happen, because the "
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"assignment message never gets transmitted. Please "
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"be sure not to free in this state. PLEASE FIX!\n",
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tbf_name(tbf));
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tbf->stop_timer();
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#warning "TODO: Could/Should generate bssgp_tx_llc_discarded"
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tbf_unlink_pdch(tbf);
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llist_del(&tbf->list.list);
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if (tbf->direction == GPRS_RLCMAC_UL_TBF)
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tbf->bts->tbf_ul_freed();
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else
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tbf->bts->tbf_dl_freed();
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if (tbf->ms())
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tbf->set_ms(NULL);
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LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n");
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talloc_free(tbf);
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}
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int gprs_rlcmac_tbf::update()
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{
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struct gprs_rlcmac_bts *bts_data = bts->bts_data();
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int rc;
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LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n");
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if (direction != GPRS_RLCMAC_DL_TBF)
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return -EINVAL;
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tbf_unlink_pdch(this);
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rc = bts_data->alloc_algorithm(bts_data, ms(), this,
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bts_data->alloc_algorithm_curst, 0, -1);
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/* if no resource */
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if (rc < 0) {
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LOGP(DRLCMAC, LOGL_ERROR, "No resource after update???\n");
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return -rc;
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}
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return 0;
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}
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int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf)
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{
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if (tbf->control_ts == 0xff)
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LOGP(DRLCMAC, LOGL_INFO, "- Setting Control TS %d\n",
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tbf->first_common_ts);
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else if (tbf->control_ts != tbf->first_common_ts)
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LOGP(DRLCMAC, LOGL_INFO, "- Changing Control TS %d\n",
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tbf->first_common_ts);
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tbf->control_ts = tbf->first_common_ts;
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return 0;
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}
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const char *gprs_rlcmac_tbf::tbf_state_name[] = {
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"NULL",
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"ASSIGN",
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"FLOW",
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"FINISHED",
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"WAIT RELEASE",
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"RELEASING",
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};
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void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T,
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unsigned int seconds, unsigned int microseconds)
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{
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if (!osmo_timer_pending(&tbf->timer))
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LOGP(DRLCMAC, LOGL_DEBUG, "%s starting timer %u.\n",
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tbf_name(tbf), T);
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else
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LOGP(DRLCMAC, LOGL_DEBUG, "%s restarting timer %u "
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"while old timer %u pending \n",
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tbf_name(tbf), T, tbf->T);
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tbf->T = T;
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tbf->num_T_exp = 0;
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/* Tunning timers can be safely re-scheduled. */
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tbf->timer.data = tbf;
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tbf->timer.cb = &tbf_timer_cb;
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osmo_timer_schedule(&tbf->timer, seconds, microseconds);
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}
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void gprs_rlcmac_tbf::stop_t3191()
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{
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return stop_timer();
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}
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void gprs_rlcmac_tbf::stop_timer()
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{
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if (osmo_timer_pending(&timer)) {
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LOGP(DRLCMAC, LOGL_DEBUG, "%s stopping timer %u.\n",
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tbf_name(this), T);
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osmo_timer_del(&timer);
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}
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}
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void gprs_rlcmac_tbf::poll_timeout()
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{
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LOGP(DRLCMAC, LOGL_NOTICE, "%s poll timeout for FN=%d (curr FN %d)\n",
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tbf_name(this), poll_fn, bts->current_frame_number());
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poll_state = GPRS_RLCMAC_POLL_NONE;
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if (ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) {
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if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) {
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LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling "
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"PACKET CONTROL ACK for PACKET UPLINK ACK\n");
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rlcmac_diag();
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state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK);
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}
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ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE;
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bts->rlc_ack_timedout();
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if (state_is(GPRS_RLCMAC_FINISHED)) {
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gprs_rlcmac_ul_tbf *ul_tbf = static_cast<gprs_rlcmac_ul_tbf *>(this);
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ul_tbf->m_n3103++;
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if (ul_tbf->m_n3103 == ul_tbf->bts->bts_data()->n3103) {
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LOGP(DRLCMAC, LOGL_NOTICE,
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"- N3103 exceeded\n");
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ul_tbf->set_state(GPRS_RLCMAC_RELEASING);
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tbf_timer_start(ul_tbf, 3169, ul_tbf->bts->bts_data()->t3169, 0);
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return;
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}
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/* reschedule UL ack */
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ul_tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK;
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}
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} else if (ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) {
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if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) {
|
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LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling "
|
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"PACKET CONTROL ACK for PACKET UPLINK "
|
|
"ASSIGNMENT.\n");
|
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rlcmac_diag();
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state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS);
|
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}
|
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ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE;
|
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n3105++;
|
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bts->rlc_ass_timedout();
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if (n3105 == bts_data()->n3105) {
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LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n");
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set_state(GPRS_RLCMAC_RELEASING);
|
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tbf_timer_start(this, 3195, bts_data()->t3195, 0);
|
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bts->rlc_ass_failed();
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return;
|
|
}
|
|
/* reschedule UL assignment */
|
|
ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS;
|
|
} else if (dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) {
|
|
if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling "
|
|
"PACKET CONTROL ACK for PACKET DOWNLINK "
|
|
"ASSIGNMENT.\n");
|
|
rlcmac_diag();
|
|
state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS);
|
|
}
|
|
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
|
|
n3105++;
|
|
bts->rlc_ass_timedout();
|
|
if (n3105 == bts->bts_data()->n3105) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n");
|
|
set_state(GPRS_RLCMAC_RELEASING);
|
|
tbf_timer_start(this, 3195, bts_data()->t3195, 0);
|
|
bts->rlc_ass_failed();
|
|
return;
|
|
}
|
|
/* reschedule DL assignment */
|
|
dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS;
|
|
} else if (direction == GPRS_RLCMAC_DL_TBF) {
|
|
gprs_rlcmac_dl_tbf *dl_tbf = static_cast<gprs_rlcmac_dl_tbf *>(this);
|
|
|
|
if (!(dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling "
|
|
"PACKET DOWNLINK ACK.\n");
|
|
dl_tbf->rlcmac_diag();
|
|
dl_tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK);
|
|
}
|
|
dl_tbf->n3105++;
|
|
if (dl_tbf->state_is(GPRS_RLCMAC_RELEASING))
|
|
bts->rlc_rel_timedout();
|
|
else
|
|
bts->rlc_ack_timedout();
|
|
if (dl_tbf->n3105 == dl_tbf->bts->bts_data()->n3105) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n");
|
|
dl_tbf->set_state(GPRS_RLCMAC_RELEASING);
|
|
tbf_timer_start(dl_tbf, 3195, dl_tbf->bts_data()->t3195, 0);
|
|
bts->rlc_ack_failed();
|
|
return;
|
|
}
|
|
/* resend IMM.ASS on CCCH on timeout */
|
|
if ((dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))
|
|
&& !(dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) {
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "Re-send dowlink assignment "
|
|
"for %s on PCH (IMSI=%s)\n",
|
|
tbf_name(dl_tbf),
|
|
imsi());
|
|
/* send immediate assignment */
|
|
dl_tbf->bts->snd_dl_ass(dl_tbf, 0, imsi());
|
|
dl_tbf->m_wait_confirm = 1;
|
|
}
|
|
} else
|
|
LOGP(DRLCMAC, LOGL_ERROR, "- Poll Timeout, but no event!\n");
|
|
}
|
|
|
|
static int setup_tbf(struct gprs_rlcmac_tbf *tbf,
|
|
GprsMs *ms, int8_t use_trx,
|
|
uint8_t ms_class, uint8_t single_slot)
|
|
{
|
|
int rc;
|
|
struct gprs_rlcmac_bts *bts;
|
|
if (!tbf)
|
|
return -1;
|
|
|
|
bts = tbf->bts->bts_data();
|
|
|
|
tbf->m_created_ts = time(NULL);
|
|
tbf->set_ms_class(ms_class);
|
|
/* select algorithm */
|
|
rc = bts->alloc_algorithm(bts, ms, tbf, bts->alloc_algorithm_curst,
|
|
single_slot, use_trx);
|
|
/* if no resource */
|
|
if (rc < 0) {
|
|
return -1;
|
|
}
|
|
/* assign control ts */
|
|
rc = tbf_assign_control_ts(tbf);
|
|
/* if no resource */
|
|
if (rc < 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* set timestamp */
|
|
gettimeofday(&tbf->meas.rssi_tv, NULL);
|
|
|
|
tbf->set_ms(ms);
|
|
|
|
LOGP(DRLCMAC, LOGL_INFO,
|
|
"Allocated %s: trx = %d, ul_slots = %02x, dl_slots = %02x\n",
|
|
tbf->name(), tbf->trx->trx_no, tbf->ul_slots(), tbf->dl_slots());
|
|
|
|
return 0;
|
|
}
|
|
|
|
gprs_rlcmac_ul_tbf::gprs_rlcmac_ul_tbf(BTS *bts_) :
|
|
gprs_rlcmac_tbf(bts_, GPRS_RLCMAC_UL_TBF),
|
|
m_rx_counter(0),
|
|
m_n3103(0),
|
|
m_contention_resolution_done(0),
|
|
m_final_ack_sent(0)
|
|
{
|
|
memset(&m_window, 0, sizeof(m_window));
|
|
memset(&m_usf, 0, sizeof(m_usf));
|
|
}
|
|
|
|
static int ul_tbf_dtor(struct gprs_rlcmac_ul_tbf *tbf)
|
|
{
|
|
tbf->~gprs_rlcmac_ul_tbf();
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_tbf(struct gprs_rlcmac_bts *bts,
|
|
GprsMs *ms, int8_t use_trx,
|
|
uint8_t ms_class, uint8_t single_slot)
|
|
{
|
|
struct gprs_rlcmac_ul_tbf *tbf;
|
|
int rc;
|
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n");
|
|
LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: MS_CLASS=%d\n",
|
|
"UL", ms_class);
|
|
|
|
tbf = talloc(tall_pcu_ctx, struct gprs_rlcmac_ul_tbf);
|
|
|
|
if (!tbf)
|
|
return NULL;
|
|
|
|
talloc_set_destructor(tbf, ul_tbf_dtor);
|
|
new (tbf) gprs_rlcmac_ul_tbf(bts->bts);
|
|
|
|
if (!ms)
|
|
ms = bts->bts->ms_alloc(ms_class);
|
|
|
|
rc = setup_tbf(tbf, ms, use_trx, ms_class, single_slot);
|
|
/* if no resource */
|
|
if (rc < 0) {
|
|
talloc_free(tbf);
|
|
return NULL;
|
|
}
|
|
|
|
llist_add(&tbf->list.list, &bts->ul_tbfs);
|
|
tbf->bts->tbf_ul_created();
|
|
|
|
return tbf;
|
|
}
|
|
|
|
gprs_rlcmac_dl_tbf::BandWidth::BandWidth() :
|
|
dl_bw_octets(0),
|
|
dl_loss_lost(0),
|
|
dl_loss_received(0)
|
|
{
|
|
timerclear(&dl_bw_tv);
|
|
timerclear(&dl_loss_tv);
|
|
}
|
|
|
|
gprs_rlcmac_dl_tbf::gprs_rlcmac_dl_tbf(BTS *bts_) :
|
|
gprs_rlcmac_tbf(bts_, GPRS_RLCMAC_DL_TBF),
|
|
m_tx_counter(0),
|
|
m_wait_confirm(0),
|
|
m_dl_ack_requested(false),
|
|
m_last_dl_poll_fn(0),
|
|
m_last_dl_drained_fn(0)
|
|
{
|
|
memset(&m_window, 0, sizeof(m_window));
|
|
memset(&m_llc_timer, 0, sizeof(m_llc_timer));
|
|
}
|
|
|
|
static int dl_tbf_dtor(struct gprs_rlcmac_dl_tbf *tbf)
|
|
{
|
|
tbf->~gprs_rlcmac_dl_tbf();
|
|
return 0;
|
|
}
|
|
|
|
struct gprs_rlcmac_dl_tbf *tbf_alloc_dl_tbf(struct gprs_rlcmac_bts *bts,
|
|
GprsMs *ms, int8_t use_trx,
|
|
uint8_t ms_class, uint8_t single_slot)
|
|
{
|
|
struct gprs_rlcmac_dl_tbf *tbf;
|
|
int rc;
|
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n");
|
|
LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: MS_CLASS=%d\n",
|
|
"DL", ms_class);
|
|
|
|
tbf = talloc(tall_pcu_ctx, struct gprs_rlcmac_dl_tbf);
|
|
|
|
if (!tbf)
|
|
return NULL;
|
|
|
|
talloc_set_destructor(tbf, dl_tbf_dtor);
|
|
new (tbf) gprs_rlcmac_dl_tbf(bts->bts);
|
|
|
|
if (!ms)
|
|
ms = bts->bts->ms_alloc(ms_class);
|
|
|
|
rc = setup_tbf(tbf, ms, use_trx, ms_class, single_slot);
|
|
/* if no resource */
|
|
if (rc < 0) {
|
|
talloc_free(tbf);
|
|
return NULL;
|
|
}
|
|
|
|
llist_add(&tbf->list.list, &bts->dl_tbfs);
|
|
tbf->bts->tbf_dl_created();
|
|
|
|
tbf->m_last_dl_poll_fn = -1;
|
|
tbf->m_last_dl_drained_fn = -1;
|
|
|
|
gettimeofday(&tbf->m_bw.dl_bw_tv, NULL);
|
|
gettimeofday(&tbf->m_bw.dl_loss_tv, NULL);
|
|
|
|
return tbf;
|
|
}
|
|
|
|
static void tbf_timer_cb(void *_tbf)
|
|
{
|
|
struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf;
|
|
tbf->handle_timeout();
|
|
}
|
|
|
|
void gprs_rlcmac_tbf::handle_timeout()
|
|
{
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "%s timer %u expired.\n",
|
|
tbf_name(this), T);
|
|
|
|
num_T_exp++;
|
|
|
|
switch (T) {
|
|
case 0: /* assignment */
|
|
if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) {
|
|
if (state_is(GPRS_RLCMAC_ASSIGN)) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "%s releasing due to "
|
|
"PACCH assignment timeout.\n", tbf_name(this));
|
|
tbf_free(this);
|
|
return;
|
|
} else
|
|
LOGP(DRLCMAC, LOGL_ERROR, "Error: %s is not "
|
|
"in assign state\n", tbf_name(this));
|
|
}
|
|
if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) {
|
|
gprs_rlcmac_dl_tbf *dl_tbf = static_cast<gprs_rlcmac_dl_tbf *>(this);
|
|
dl_tbf->m_wait_confirm = 0;
|
|
if (dl_tbf->state_is(GPRS_RLCMAC_ASSIGN)) {
|
|
tbf_assign_control_ts(dl_tbf);
|
|
|
|
if (!dl_tbf->upgrade_to_multislot) {
|
|
/* change state to FLOW, so scheduler
|
|
* will start transmission */
|
|
dl_tbf->set_state(GPRS_RLCMAC_FLOW);
|
|
break;
|
|
}
|
|
|
|
/* This tbf can be upgraded to use multiple DL
|
|
* timeslots and now that there is already one
|
|
* slot assigned send another DL assignment via
|
|
* PDCH. */
|
|
|
|
/* keep to flags */
|
|
dl_tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK;
|
|
dl_tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH);
|
|
|
|
dl_tbf->update();
|
|
|
|
dl_tbf->bts->trigger_dl_ass(dl_tbf, dl_tbf);
|
|
} else
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "%s Continue flow after "
|
|
"IMM.ASS confirm\n", tbf_name(dl_tbf));
|
|
}
|
|
break;
|
|
case 3169:
|
|
case 3191:
|
|
case 3195:
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "%s T%d timeout during "
|
|
"transsmission\n", tbf_name(this), T);
|
|
rlcmac_diag();
|
|
/* fall through */
|
|
case 3193:
|
|
LOGP(DRLCMAC, LOGL_DEBUG,
|
|
"%s will be freed due to timeout\n", tbf_name(this));
|
|
/* free TBF */
|
|
tbf_free(this);
|
|
return;
|
|
break;
|
|
default:
|
|
LOGP(DRLCMAC, LOGL_ERROR,
|
|
"%s timer expired in unknown mode: %u\n", tbf_name(this), T);
|
|
}
|
|
}
|
|
|
|
int gprs_rlcmac_tbf::rlcmac_diag()
|
|
{
|
|
if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH)))
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on CCCH\n");
|
|
if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH)))
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on PACCH\n");
|
|
if ((state_flags & (1 << GPRS_RLCMAC_FLAG_UL_DATA)))
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- Uplink data was received\n");
|
|
else if (direction == GPRS_RLCMAC_UL_TBF)
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- No uplink data received yet\n");
|
|
if ((state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK)))
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- Downlink ACK was received\n");
|
|
else if (direction == GPRS_RLCMAC_DL_TBF)
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "- No downlink ACK received yet\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct msgb *gprs_rlcmac_tbf::create_dl_ass(uint32_t fn)
|
|
{
|
|
struct msgb *msg;
|
|
struct gprs_rlcmac_dl_tbf *new_dl_tbf = NULL;
|
|
int poll_ass_dl = 1;
|
|
|
|
if (direction == GPRS_RLCMAC_DL_TBF && control_ts != first_common_ts) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "Cannot poll for downlink "
|
|
"assigment, because MS cannot reply. (control TS=%d, "
|
|
"first common TS=%d)\n", control_ts,
|
|
first_common_ts);
|
|
poll_ass_dl = 0;
|
|
}
|
|
if (poll_ass_dl) {
|
|
if (poll_state != GPRS_RLCMAC_POLL_NONE) {
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already sheduled "
|
|
"for %s, so we must wait for downlink "
|
|
"assignment...\n", tbf_name(this));
|
|
return NULL;
|
|
}
|
|
if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) {
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already "
|
|
"scheduled for single block allocation...\n");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* on uplink TBF we get the downlink TBF to be assigned. */
|
|
if (direction == GPRS_RLCMAC_UL_TBF) {
|
|
gprs_rlcmac_ul_tbf *ul_tbf = static_cast<gprs_rlcmac_ul_tbf *>(this);
|
|
|
|
/* be sure to check first, if contention resolution is done,
|
|
* otherwise we cannot send the assignment yet */
|
|
if (!ul_tbf->m_contention_resolution_done) {
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "Cannot assign DL TBF now, "
|
|
"because contention resolution is not "
|
|
"finished.\n");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (ms())
|
|
new_dl_tbf = ms()->dl_tbf();
|
|
|
|
if (!new_dl_tbf) {
|
|
LOGP(DRLCMACDL, LOGL_ERROR, "We have a schedule for downlink "
|
|
"assignment at %s, but there is no downlink "
|
|
"TBF\n", tbf_name(this));
|
|
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
|
|
return NULL;
|
|
}
|
|
|
|
new_dl_tbf->was_releasing = was_releasing;
|
|
msg = msgb_alloc(23, "rlcmac_dl_ass");
|
|
if (!msg)
|
|
return NULL;
|
|
bitvec *ass_vec = bitvec_alloc(23);
|
|
if (!ass_vec) {
|
|
msgb_free(msg);
|
|
return NULL;
|
|
}
|
|
bitvec_unhex(ass_vec,
|
|
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
|
LOGP(DRLCMAC, LOGL_INFO, "%s start Packet Downlink Assignment (PACCH)\n", tbf_name(new_dl_tbf));
|
|
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
|
|
Encoding::write_packet_downlink_assignment(mac_control_block, m_tfi,
|
|
(direction == GPRS_RLCMAC_DL_TBF), new_dl_tbf,
|
|
poll_ass_dl, bts_data()->alpha, bts_data()->gamma, -1, 0);
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n");
|
|
encode_gsm_rlcmac_downlink(ass_vec, mac_control_block);
|
|
LOGPC(DCSN1, LOGL_NOTICE, "\n");
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n");
|
|
bitvec_pack(ass_vec, msgb_put(msg, 23));
|
|
bitvec_free(ass_vec);
|
|
talloc_free(mac_control_block);
|
|
|
|
if (poll_ass_dl) {
|
|
poll_state = GPRS_RLCMAC_POLL_SCHED;
|
|
poll_fn = (fn + 13) % 2715648;
|
|
dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK;
|
|
LOGP(DRLCMACDL, LOGL_INFO,
|
|
"%s Scheduled DL Assignment polling on FN=%d\n",
|
|
name(), poll_fn);
|
|
} else {
|
|
dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
|
|
new_dl_tbf->set_state(GPRS_RLCMAC_FLOW);
|
|
tbf_assign_control_ts(new_dl_tbf);
|
|
/* stop pending assignment timer */
|
|
new_dl_tbf->stop_timer();
|
|
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
struct msgb *gprs_rlcmac_tbf::create_ul_ass(uint32_t fn)
|
|
{
|
|
struct msgb *msg;
|
|
struct gprs_rlcmac_ul_tbf *new_tbf = NULL;
|
|
|
|
if (poll_state != GPRS_RLCMAC_POLL_NONE) {
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already "
|
|
"sheduled for %s, so we must wait for uplink "
|
|
"assignment...\n", tbf_name(this));
|
|
return NULL;
|
|
}
|
|
if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) {
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for "
|
|
"single block allocation...\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (ms())
|
|
new_tbf = ms()->ul_tbf();
|
|
if (!new_tbf) {
|
|
LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink "
|
|
"assignment at downlink %s, but there is no uplink "
|
|
"TBF\n", tbf_name(this));
|
|
ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE;
|
|
return NULL;
|
|
}
|
|
|
|
msg = msgb_alloc(23, "rlcmac_ul_ass");
|
|
if (!msg)
|
|
return NULL;
|
|
LOGP(DRLCMAC, LOGL_INFO, "%ss start Packet Uplink Assignment (PACCH)\n", tbf_name(new_tbf));
|
|
bitvec *ass_vec = bitvec_alloc(23);
|
|
if (!ass_vec) {
|
|
msgb_free(msg);
|
|
return NULL;
|
|
}
|
|
bitvec_unhex(ass_vec,
|
|
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
|
Encoding::write_packet_uplink_assignment(bts_data(), ass_vec, m_tfi,
|
|
(direction == GPRS_RLCMAC_DL_TBF), tlli(),
|
|
is_tlli_valid(), new_tbf, 1, bts_data()->alpha,
|
|
bts_data()->gamma, -1);
|
|
bitvec_pack(ass_vec, msgb_put(msg, 23));
|
|
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n");
|
|
decode_gsm_rlcmac_downlink(ass_vec, mac_control_block);
|
|
LOGPC(DCSN1, LOGL_NOTICE, "\n");
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n");
|
|
bitvec_free(ass_vec);
|
|
talloc_free(mac_control_block);
|
|
|
|
poll_state = GPRS_RLCMAC_POLL_SCHED;
|
|
poll_fn = (fn + 13) % 2715648;
|
|
ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK;
|
|
LOGP(DRLCMACDL, LOGL_INFO,
|
|
"%s Scheduled UL Assignment polling on FN=%d\n",
|
|
name(), poll_fn);
|
|
|
|
return msg;
|
|
}
|
|
|
|
void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_trx *trx)
|
|
{
|
|
for (uint8_t ts = 0; ts < 8; ts++)
|
|
free_all(&trx->pdch[ts]);
|
|
}
|
|
|
|
void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_pdch *pdch)
|
|
{
|
|
for (uint8_t tfi = 0; tfi < 32; tfi++) {
|
|
struct gprs_rlcmac_tbf *tbf;
|
|
|
|
tbf = pdch->ul_tbf_by_tfi(tfi);
|
|
if (tbf)
|
|
tbf_free(tbf);
|
|
tbf = pdch->dl_tbf_by_tfi(tfi);
|
|
if (tbf)
|
|
tbf_free(tbf);
|
|
}
|
|
}
|
|
|
|
int gprs_rlcmac_tbf::establish_dl_tbf_on_pacch()
|
|
{
|
|
struct gprs_rlcmac_dl_tbf *new_tbf = NULL;
|
|
|
|
bts->tbf_reused();
|
|
|
|
new_tbf = tbf_alloc_dl_tbf(bts->bts_data(), ms(),
|
|
this->trx->trx_no, ms_class(), 0);
|
|
|
|
if (!new_tbf) {
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n");
|
|
return -1;
|
|
}
|
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "%s Trigger downlink assignment on PACCH\n",
|
|
tbf_name(this));
|
|
bts->trigger_dl_ass(new_tbf, this);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gprs_rlcmac_tbf::extract_tlli(const uint8_t *data, const size_t len)
|
|
{
|
|
struct gprs_rlcmac_tbf *dl_tbf = NULL;
|
|
struct gprs_rlcmac_tbf *ul_tbf = NULL;
|
|
struct rlc_ul_header *rh = (struct rlc_ul_header *)data;
|
|
uint32_t new_tlli;
|
|
int rc;
|
|
GprsMs *old_ms;
|
|
|
|
OSMO_ASSERT(direction == GPRS_RLCMAC_UL_TBF);
|
|
|
|
/* no TLLI yet */
|
|
if (!rh->ti) {
|
|
LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TFI=%d without "
|
|
"TLLI, but no TLLI received yet\n", rh->tfi);
|
|
return 0;
|
|
}
|
|
rc = Decoding::tlli_from_ul_data(data, len, &new_tlli);
|
|
if (rc) {
|
|
bts->decode_error();
|
|
LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI "
|
|
"of UL DATA TFI=%d.\n", rh->tfi);
|
|
return 0;
|
|
}
|
|
|
|
old_ms = bts->ms_by_tlli(new_tlli);
|
|
/* Keep the old MS object for the update_ms() */
|
|
GprsMs::Guard guard(old_ms);
|
|
if (old_ms) {
|
|
/* Get them before calling set_ms() */
|
|
dl_tbf = old_ms->dl_tbf();
|
|
ul_tbf = old_ms->ul_tbf();
|
|
|
|
if (!ms())
|
|
set_ms(old_ms);
|
|
|
|
/* there might be an active and valid downlink TBF */
|
|
if (!ms()->dl_tbf() && dl_tbf)
|
|
/* Move it to the current MS (see the guard above) */
|
|
dl_tbf->set_ms(ms());
|
|
}
|
|
|
|
/* The TLLI has been taken from an UL message */
|
|
update_ms(new_tlli, GPRS_RLCMAC_UL_TBF);
|
|
LOGP(DRLCMACUL, LOGL_INFO, "Decoded premier TLLI=0x%08x of "
|
|
"UL DATA TFI=%d.\n", tlli(), rh->tfi);
|
|
if (dl_tbf && dl_tbf->ms() != ms()) {
|
|
LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from "
|
|
"TLLI=0x%08x while %s still exists. "
|
|
"Killing pending DL TBF\n", tlli(),
|
|
tbf_name(dl_tbf));
|
|
tbf_free(dl_tbf);
|
|
dl_tbf = NULL;
|
|
}
|
|
if (ul_tbf && ul_tbf->ms() != ms()) {
|
|
LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from "
|
|
"TLLI=0x%08x while %s still exists. "
|
|
"Killing pending UL TBF\n", tlli(),
|
|
tbf_name(ul_tbf));
|
|
tbf_free(ul_tbf);
|
|
ul_tbf = NULL;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
const char *tbf_name(gprs_rlcmac_tbf *tbf)
|
|
{
|
|
return tbf->name();
|
|
}
|
|
|
|
const char *gprs_rlcmac_tbf::name() const
|
|
{
|
|
if (this == NULL)
|
|
return "(no TBF)";
|
|
|
|
snprintf(m_name_buf, sizeof(m_name_buf) - 1,
|
|
"TBF(TFI=%d TLLI=0x%08x DIR=%s STATE=%s)",
|
|
m_tfi, tlli(),
|
|
direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL",
|
|
state_name()
|
|
);
|
|
m_name_buf[sizeof(m_name_buf) - 1] = '\0';
|
|
return m_name_buf;
|
|
}
|
|
|
|
void gprs_rlcmac_tbf::rotate_in_list()
|
|
{
|
|
llist_del(&list.list);
|
|
if (direction == GPRS_RLCMAC_UL_TBF)
|
|
llist_add(&list.list, &bts->bts_data()->ul_tbfs);
|
|
else
|
|
llist_add(&list.list, &bts->bts_data()->dl_tbfs);
|
|
}
|
|
|
|
uint8_t gprs_rlcmac_tbf::tsc() const
|
|
{
|
|
return trx->pdch[first_ts].tsc;
|
|
}
|
|
|
|
uint8_t gprs_rlcmac_tbf::dl_slots() const
|
|
{
|
|
uint8_t slots = 0;
|
|
size_t i;
|
|
|
|
if (direction == GPRS_RLCMAC_UL_TBF)
|
|
return 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pdch); i += 1)
|
|
if (pdch[i])
|
|
slots |= 1 << i;
|
|
|
|
return slots;
|
|
}
|
|
|
|
uint8_t gprs_rlcmac_tbf::ul_slots() const
|
|
{
|
|
uint8_t slots = 0;
|
|
size_t i;
|
|
|
|
if (direction == GPRS_RLCMAC_DL_TBF) {
|
|
if (control_ts < 8)
|
|
slots |= 1 << control_ts;
|
|
if (first_common_ts < 8)
|
|
slots |= 1 << first_common_ts;
|
|
|
|
return slots;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pdch); i += 1)
|
|
if (pdch[i])
|
|
slots |= 1 << i;
|
|
|
|
return slots;
|
|
}
|
|
|
|
void tbf_print_vty_info(struct vty *vty, struct llist_head *ltbf)
|
|
{
|
|
gprs_rlcmac_tbf *tbf = llist_pods_entry(ltbf, gprs_rlcmac_tbf);
|
|
|
|
vty_out(vty, "TBF: TFI=%d TLLI=0x%08x (%s) DIR=%s IMSI=%s%s", tbf->tfi(),
|
|
tbf->tlli(), tbf->is_tlli_valid() ? "valid" : "invalid",
|
|
tbf->direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL",
|
|
tbf->imsi(), VTY_NEWLINE);
|
|
vty_out(vty, " created=%lu state=%08x 1st_TS=%d 1st_cTS=%d ctrl_TS=%d "
|
|
"MS_CLASS=%d%s",
|
|
tbf->created_ts(), tbf->state_flags, tbf->first_ts,
|
|
tbf->first_common_ts, tbf->control_ts, tbf->ms_class(),
|
|
VTY_NEWLINE);
|
|
vty_out(vty, " TS_alloc=");
|
|
for (int i = 0; i < 8; i++) {
|
|
if (tbf->pdch[i])
|
|
vty_out(vty, "%d ", i);
|
|
}
|
|
vty_out(vty, " CS=%d%s%s", tbf->ms() ? tbf->ms()->current_cs_dl() : 1,
|
|
VTY_NEWLINE, VTY_NEWLINE);
|
|
}
|