This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/gerrit-log@lists.osmocom.org/.
Neels Hofmeyr gerrit-no-reply at lists.osmocom.orgReview at https://gerrit.osmocom.org/8038 dyn TS: clear TCH state upon reconnecting as PDCH For ip.access style TCH/F_PDCH, this fixes switch-back to PDCH in case the TCH use employed encryption. For Osmocom style TCH/F_TCH/H_PDCH, do the same, purely out of sanity. Roughly the same should already be happening during PDCH Chan Activ, but make sure to clear all these fields, so they are cleared even if IEs are missing. >From both dyn TS code paths, call new clear_lchan_for_pdch_activ(), which clears the same fields that are normally overwritten by an RSL Chan Activ. Related: OS#3238 Change-Id: I8451039683b54bee910c97c5a3e6873e0ff1b160 --- M src/common/rsl.c 1 file changed, 26 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/38/8038/1 diff --git a/src/common/rsl.c b/src/common/rsl.c index 1dc200d..52eb5f4 100644 --- a/src/common/rsl.c +++ b/src/common/rsl.c @@ -871,6 +871,26 @@ return 0; } +/* Make sure no state from TCH use remains. */ +static void clear_lchan_for_pdch_activ(struct gsm_lchan *lchan) +{ + /* These values don't apply to PDCH, just clear them. Particularly the encryption must be + * cleared, or we would enable encryption on PDCH with parameters remaining from the TCH. */ + lchan->ms_power = ms_pwr_ctl_lvl(lchan->ts->trx->bts->band, 0); + lchan->ms_power_ctrl.current = lchan->ms_power; + lchan->ms_power_ctrl.fixed = 0; + lchan->rsl_cmode = 0; + lchan->tch_mode = 0; + memset(&lchan->encr, 0, sizeof(lchan->encr)); + memset(&lchan->ho, 0, sizeof(lchan->ho)); + lchan->bs_power = 0; + lchan->ms_power = 0; + memset(&lchan->ms_power_ctrl, 0, sizeof(lchan->ms_power_ctrl)); + lchan->rqd_ta = 0; + copy_sacch_si_to_lchan(lchan); + memset(&lchan->tch, 0, sizeof(lchan->tch)); +} + /*! * Store the CHAN_ACTIV msg, connect the L1 timeslot in the proper type and * then invoke rsl_rx_chan_activ() with msg. @@ -882,7 +902,10 @@ switch (ts->dyn.pchan_want) { case GSM_PCHAN_TCH_F: case GSM_PCHAN_TCH_H: + break; case GSM_PCHAN_PDCH: + /* Only the first lchan matters for PDCH */ + clear_lchan_for_pdch_activ(ts->lchan); break; default: LOGP(DRSL, LOGL_ERROR, @@ -2096,6 +2119,9 @@ } if (pdch_act) { + /* Clear TCH state. Only first lchan matters for PDCH */ + clear_lchan_for_pdch_activ(ts->lchan); + /* First, disconnect the TCH channel, to connect PDTCH later */ rc = bts_model_ts_disconnect(ts); } else { -- To view, visit https://gerrit.osmocom.org/8038 To unsubscribe, visit https://gerrit.osmocom.org/settings Gerrit-MessageType: newchange Gerrit-Change-Id: I8451039683b54bee910c97c5a3e6873e0ff1b160 Gerrit-PatchSet: 1 Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>