diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2013-02-21 09:27:52 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2015-09-06 14:47:32 +0200 |
| commit | 5f53a55dde13a25e59a04ed4445e4ef94bd40d45 (patch) | |
| tree | 5ace7994f357375f200e0d5bb248a118400d4ead /src/osmo-bts-trx/l1_if.c | |
| parent | 10022fdba882853f57cc9a92c30e6dcf85e8c940 (diff) | |
TRX: Ciphering
Diffstat (limited to 'src/osmo-bts-trx/l1_if.c')
| -rw-r--r-- | src/osmo-bts-trx/l1_if.c | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/src/osmo-bts-trx/l1_if.c b/src/osmo-bts-trx/l1_if.c index 51b1f439..58c2587b 100644 --- a/src/osmo-bts-trx/l1_if.c +++ b/src/osmo-bts-trx/l1_if.c @@ -357,9 +357,29 @@ static uint8_t trx_set_ts(struct gsm_bts_trx_ts *ts) /* enable ciphering */ static int l1if_set_ciphering(struct trx_l1h *l1h, struct gsm_lchan *lchan, - int downlink) + uint8_t chan_nr, int downlink) { - // FIXME + /* ciphering already enabled in both directions */ + if (lchan->ciph_state == LCHAN_CIPH_TXRX_CONF) + return -EINVAL; + + if (!downlink) { + /* set uplink */ + trx_sched_set_cipher(l1h, chan_nr, 0, lchan->encr.alg_id - 1, + lchan->encr.key, lchan->encr.key_len); + lchan->ciph_state = LCHAN_CIPH_RX_CONF; + } else { + /* set downlink and also set uplink, if not already */ + if (lchan->ciph_state != LCHAN_CIPH_RX_CONF) { + trx_sched_set_cipher(l1h, chan_nr, 0, + lchan->encr.alg_id - 1, lchan->encr.key, + lchan->encr.key_len); + } + trx_sched_set_cipher(l1h, chan_nr, 1, lchan->encr.alg_id - 1, + lchan->encr.key, lchan->encr.key_len); + lchan->ciph_state = LCHAN_CIPH_TXRX_CONF; + } + return 0; } @@ -423,14 +443,10 @@ int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap) tn = L1SAP_CHAN2TS(chan_nr); ss = l1sap_chan2ss(chan_nr); lchan = &trx->ts[tn].lchan[ss]; - if (l1sap->u.info.u.ciph_req.downlink) { - l1if_set_ciphering(l1h, lchan, 1); - lchan->ciph_state = LCHAN_CIPH_RX_REQ; - } - if (l1sap->u.info.u.ciph_req.uplink) { - l1if_set_ciphering(l1h, lchan, 0); - lchan->ciph_state = LCHAN_CIPH_TXRX_REQ; - } + if (l1sap->u.info.u.ciph_req.uplink) + l1if_set_ciphering(l1h, lchan, chan_nr, 0); + if (l1sap->u.info.u.ciph_req.downlink) + l1if_set_ciphering(l1h, lchan, chan_nr, 1); break; case PRIM_INFO_ACTIVATE: case PRIM_INFO_DEACTIVATE: |