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bts: Move gprs_rlcmac_rcv_rach into the BTS class

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This commit is contained in:
Holger Hans Peter Freyther
2013-10-26 20:56:20 +02:00
parent 2db7e7e7db
commit 02beed5e98
5 changed files with 83 additions and 86 deletions
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81
src/bts.cpp
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@@ -331,6 +331,87 @@ int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn)
return 0;
}
int BTS::rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta)
{
struct gprs_rlcmac_tbf *tbf;
uint8_t trx, ts = 0;
int8_t tfi; /* must be signed */
uint8_t sb = 0;
uint32_t sb_fn = 0;
int rc;
uint8_t plen;
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide "
"one:\n");
if ((ra & 0xf8) == 0x70) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block "
"allocation\n");
sb = 1;
} else if (m_bts.force_two_phase) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, "
"but we force two phase access\n");
sb = 1;
}
if (qta < 0)
qta = 0;
if (qta > 252)
qta = 252;
if (sb) {
rc = sba()->alloc(&trx, &ts, &sb_fn, qta >> 2);
if (rc < 0)
return rc;
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH qbit-ta=%d "
"ra=0x%02x, Fn=%d (%d,%d,%d)\n", qta, ra, Fn,
(Fn / (26 * 51)) % 32, Fn % 51, Fn % 26);
LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment Uplink "
"(AGCH)\n");
} else {
// Create new TBF
#warning "Copy and pate with other routines.."
tfi = tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx, -1);
if (tfi < 0) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
return -EBUSY;
}
/* set class to 0, since we don't know the multislot class yet */
tbf = tbf_alloc(&m_bts, NULL, GPRS_RLCMAC_UL_TBF, tfi, trx, 0, 1);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
return -EBUSY;
}
tbf->ta = qta >> 2;
tbf_new_state(tbf, GPRS_RLCMAC_FLOW);
tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH);
tbf_timer_start(tbf, 3169, m_bts.t3169, 0);
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] START TFI: %u\n",
tbf->tfi);
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u RACH "
"qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)\n", tbf->tfi,
qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26);
LOGP(DRLCMAC, LOGL_INFO, "TX: START TFI: %u Immediate "
"Assignment Uplink (AGCH)\n", tbf->tfi);
}
bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */;
bitvec_unhex(immediate_assignment,
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
if (sb)
plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra,
Fn, qta >> 2, m_bts.trx[trx].arfcn, ts,
m_bts.trx[trx].pdch[ts].tsc, 0, 0, 0, 0, sb_fn, 1,
m_bts.alpha, m_bts.gamma, -1);
else
plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra,
Fn, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc,
tbf->tfi, tbf->dir.ul.usf[tbf->first_ts], 0, 0, 0, 0,
m_bts.alpha, m_bts.gamma, -1);
pcu_l1if_tx_agch(immediate_assignment, plen);
bitvec_free(immediate_assignment);
return 0;
}
/* depending on the current TBF, we assign on PACCH or AGCH */
void BTS::trigger_dl_ass(
struct gprs_rlcmac_tbf *tbf,