diff options
| author | Holger Hans Peter Freyther <zecke@selfish.org> | 2009-10-05 13:25:06 +0200 |
|---|---|---|
| committer | Holger Hans Peter Freyther <zecke@selfish.org> | 2009-10-06 04:34:25 +0200 |
| commit | ea4088a7ea5ac3f25988acbafc0b9d49509ea8cb (patch) | |
| tree | 9171544f10cf1bdbe26779c3ae72f20ecb70e43d /openbsc/src/gsm_04_08_utils.c | |
| parent | e2d82274990ddae78cabdb96087ed90ffd7a9d3a (diff) | |
[gsm0408] Move encryption message creation to gsm_04_08_utils.c
Be able to use the cipher mode command message from the MSC code.
Diffstat (limited to 'openbsc/src/gsm_04_08_utils.c')
| -rw-r--r-- | openbsc/src/gsm_04_08_utils.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/openbsc/src/gsm_04_08_utils.c b/openbsc/src/gsm_04_08_utils.c index 47ec8ab0e..88edc7dc0 100644 --- a/openbsc/src/gsm_04_08_utils.c +++ b/openbsc/src/gsm_04_08_utils.c @@ -457,3 +457,28 @@ int gsm48_handle_paging_resp(struct msgb *msg, struct gsm_subscriber *subscr) paging_request_stop(msg->trx->bts, subscr, msg->lchan); return 0; } + +/* Chapter 9.1.9: Ciphering Mode Command */ +int gsm48_send_rr_ciph_mode(struct gsm_lchan *lchan) +{ + struct msgb *msg = gsm48_msgb_alloc(); + struct gsm48_hdr *gh; + u_int8_t ciph_mod_set; + + msg->lchan = lchan; + + DEBUGP(DRR, "TX CIPHERING MODE CMD\n"); + + if (lchan->encr.alg_id <= RSL_ENC_ALG_A5(0)) + ciph_mod_set = 0; + else + ciph_mod_set = (lchan->encr.alg_id-2)<<1 | 1; + + gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); + gh->proto_discr = GSM48_PDISC_RR; + gh->msg_type = GSM48_MT_RR_CIPH_M_CMD; + gh->data[0] = 0x10 | (ciph_mod_set & 0xf); + + return rsl_encryption_cmd(msg); +} + |