diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2013-06-16 13:26:14 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2015-09-22 16:39:04 +0200 |
| commit | 75caaf294980e258b63d300284f9b7bf26fd35c9 (patch) | |
| tree | f9604f00187fdca2648fa9a51d8f9c16933d5700 /include/osmo-bts | |
| parent | 5027e122a885eab21772706d39915464c887150d (diff) | |
sysmobts: Clean up transitions for lchan cipher state
There are three transitions:
1. LCHAN_CIPH_NONE -> LCHAN_CIPH_RX_REQ -> LCHAN_CIPH_RX_CONF
It is used to enable ciphering in RX (uplink) direction only.
2. LCHAN_CIPH_RX_CONF -> LCHAN_CIPH_RX_CONF_TX_REQ -> LCHAN_CIPH_RXTX_CONF
It is used to additionally enable ciphering in TX (downlink) direction.
3. LCHAN_CIPH_NONE -> LCHAN_CIPH_RXTX_REQ -> LCHAN_CIPH_RX_CONF_TX_REQ
-> LCHAN_CIPH_RXTX_CONF
It is used to enable ciphering in both TX and RX directions. This is used
when the channel is activated with encryption already enabled. (assignment
or handover)
In order to follow the order of these transitions, the RX direction must
always be set before the TX direction.
If no cipher key is set (A5/0), ciphering is set to ALG 0, but lchan cipher
state remains at LCHAN_CIPH_NONE.
Diffstat (limited to 'include/osmo-bts')
| -rw-r--r-- | include/osmo-bts/gsm_data.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/osmo-bts/gsm_data.h b/include/osmo-bts/gsm_data.h index f2f7ee74..b5dc25fa 100644 --- a/include/osmo-bts/gsm_data.h +++ b/include/osmo-bts/gsm_data.h @@ -97,8 +97,9 @@ enum lchan_ciph_state { LCHAN_CIPH_NONE, LCHAN_CIPH_RX_REQ, LCHAN_CIPH_RX_CONF, - LCHAN_CIPH_TXRX_REQ, - LCHAN_CIPH_TXRX_CONF, + LCHAN_CIPH_RXTX_REQ, + LCHAN_CIPH_RX_CONF_TX_REQ, + LCHAN_CIPH_RXTX_CONF, }; #define bts_role_bts(x) ((struct gsm_bts_role_bts *)(x)->role) |