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osmo-bts
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Fixed check for RACH (random access) delay

This commit is contained in:
Andreas Eversberg 2012-07-08 18:44:40 +02:00
parent b57e17394b
commit ea15101896
1 changed files with 8 additions and 8 deletions
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16
src/osmo-bts-sysmo/l1_if.c
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@ -705,6 +705,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind)
struct gsm_bts_role_bts *btsb = bts->role;
struct osmo_phsap_prim pp;
struct lapdm_channel *lc;
uint8_t acc_delay;
/* increment number of busy RACH slots, if required */
if (trx == bts->c0 &&
@ -732,18 +733,17 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1, GsmL1_PhRaInd_t *ra_ind)
pp.u.rach_ind.ra = ra_ind->msgUnitParam.u8Buffer[0];
pp.u.rach_ind.fn = ra_ind->u32Fn;
/* FIXME: check for under/overflow / sign */
if (ra_ind->measParam.i16BurstTiming <= 0 ||
ra_ind->measParam.i16BurstTiming > 63 * 4)
pp.u.rach_ind.acc_delay = 0;
/* check for under/overflow / sign */
if (ra_ind->measParam.i16BurstTiming < 0)
acc_delay = 0;
else
pp.u.rach_ind.acc_delay = ra_ind->measParam.i16BurstTiming >> 2;
if (pp.u.rach_ind.acc_delay > btsb->max_ta) {
acc_delay = ra_ind->measParam.i16BurstTiming >> 2;
if (acc_delay > btsb->max_ta) {
LOGP(DL1C, LOGL_INFO, "ignoring RACH request %u > max_ta(%u)\n",
pp.u.rach_ind.acc_delay, btsb->max_ta);
acc_delay, btsb->max_ta);
return 0;
}
pp.u.rach_ind.acc_delay = acc_delay;
return lapdm_phsap_up(&pp.oph, &lc->lapdm_dcch);
}