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[gsm0408] Move encryption message creation to gsm_04_08_utils.c 

Be able to use the cipher mode command message from the MSC code.
This commit is contained in:
Holger Hans Peter Freyther 2009-10-05 13:25:06 +02:00
parent e2d8227499
commit ea4088a7ea
2 changed files with 25 additions and 24 deletions
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24
openbsc/src/gsm_04_08.c
View File

@ -1644,30 +1644,6 @@ static int gsm0408_rcv_rr(struct msgb *msg)
return rc;
}
/* 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);
}
int gsm48_send_rr_app_info(struct gsm_lchan *lchan, u_int8_t apdu_id,
u_int8_t apdu_len, u_int8_t *apdu)
{

25
openbsc/src/gsm_04_08_utils.c
View File

@ -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);
}