diff options
Diffstat (limited to 'openbsc/src/libiu/iu.c')
| -rw-r--r-- | openbsc/src/libiu/iu.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/openbsc/src/libiu/iu.c b/openbsc/src/libiu/iu.c index ed428a1af..56b6ec1d3 100644 --- a/openbsc/src/libiu/iu.c +++ b/openbsc/src/libiu/iu.c @@ -116,7 +116,8 @@ int iu_rab_deact(struct ue_conn_ctx *ue_ctx, uint8_t rab_id) return -1; } -int iu_tx_sec_mode_cmd(struct ue_conn_ctx *uectx, struct gsm_auth_tuple *tp) +int iu_tx_sec_mode_cmd(struct ue_conn_ctx *uectx, struct gsm_auth_tuple *tp, + int send_ck) { struct osmo_scu_prim *prim; struct msgb *msg; @@ -124,10 +125,6 @@ int iu_tx_sec_mode_cmd(struct ue_conn_ctx *uectx, struct gsm_auth_tuple *tp) uint8_t ck[16]; unsigned int i; - /* C4 function to dervie CK from Kc */ - memcpy(ck, tp->kc, 8); - memcpy(ck+8, tp->kc, 8); - /* C5 function to derive IK from Kc */ for (i = 0; i < 4; i++) ik[i] = tp->kc[i] ^ tp->kc[i+4]; @@ -135,8 +132,14 @@ int iu_tx_sec_mode_cmd(struct ue_conn_ctx *uectx, struct gsm_auth_tuple *tp) for (i = 12; i < 16; i++) ik[i] = ik[i-12]; + if (send_ck) { + /* C4 function to derive CK from Kc */ + memcpy(ck, tp->kc, 8); + memcpy(ck+8, tp->kc, 8); + } + /* crate RANAP message */ - msg = ranap_new_msg_sec_mod_cmd(ik, NULL); + msg = ranap_new_msg_sec_mod_cmd(ik, send_ck? ck : NULL); msg->l2h = msg->data; /* wrap RANAP message in SCCP N-DATA.req */ prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |