cellular-infrastructure
/
osmo-bsc
mirror of https://gerrit.osmocom.org/osmo-bsc
9
0
Fork 0
Code Issues Releases Wiki Activity

ASCI: Add support for NOTIFICATION COMMAND (RSL) message 

This message will be sent to each BTS with a VGCS/VBS channel to notify
the served MSs about ongoing group/broadcast calls. It is also used to
remove the notification, if the call is terminated.

Change-Id: I96ec0ee5d1a772a45f1ebfd64210718c8bf5aa58
Related: OS#4852
This commit is contained in:
Andreas Eversberg 2023-05-04 15:26:39 +02:00 committed by laforge
parent a7e3e0064d
commit bcb7b32f5a
2 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/osmocom/bsc/abis_rsl.h
View File

@ -55,6 +55,7 @@ int rsl_encryption_cmd(struct msgb *msg);
int rsl_paging_cmd(struct gsm_bts *bts, uint8_t paging_group,
const struct osmo_mobile_identity *mi,
uint8_t chan_needed, bool is_gprs);
int rsl_notification_cmd(struct gsm_bts *bts, struct gsm_lchan *lchan, struct gsm0808_group_callref *gc, uint8_t *drx);
int rsl_imm_assign_cmd(const struct gsm_bts *bts, uint8_t len, const uint8_t *val);
int rsl_tx_imm_assignment(struct gsm_lchan *lchan);
int rsl_tx_imm_ass_rej(struct gsm_bts *bts, struct gsm48_req_ref *rqd_ref);

39
src/osmo-bsc/abis_rsl.c
View File

@ -870,6 +870,45 @@ int rsl_paging_cmd(struct gsm_bts *bts, uint8_t paging_group,
return abis_rsl_sendmsg(msg);
}
/* Chapter 8.5.10: NOTIFICATION COMMAND */
int rsl_notification_cmd(struct gsm_bts *bts, struct gsm_lchan *lchan, struct gsm0808_group_callref *gc, uint8_t *drx)
{
struct abis_rsl_cchan_hdr *cch;
struct msgb *msg = rsl_msgb_alloc();
struct gsm48_chan_desc cd;
uint8_t sti = (lchan) ? RSL_CMD_INDICATOR_START : RSL_CMD_INDICATOR_STOP;
uint8_t *t;
int rc;
cch = (struct abis_rsl_cchan_hdr *) msgb_put(msg, sizeof(*cch));
rsl_init_cchan_hdr(cch, RSL_MT_NOT_CMD);
cch->chan_nr = RSL_CHAN_PCH_AGCH;
msgb_tlv_put(msg, RSL_IE_CMD_INDICATOR, 1, &sti);
/* Use TLV encoding from TS 08.08. Change different IE type. */
t = msg->tail;
gsm0808_enc_group_callref(msg, gc);
*t = RSL_IE_GROUP_CALL_REF;
if (lchan) {
memset(&cd, 0, sizeof(cd));
rc = gsm48_lchan2chan_desc(&cd, lchan, lchan->activate.tsc, true);
if (rc) {
LOG_LCHAN(lchan, LOGL_ERROR, "Error encoding Channel Number\n");
msgb_free(msg);
return rc;
}
msgb_tlv_put(msg, RSL_IE_CHAN_DESC, sizeof(cd), (const uint8_t *)&cd);
if (drx)
msgb_tlv_put(msg, RSL_IE_NCH_DRX_INFO, 1, drx);
}
msg->dst = bts->c0->rsl_link_primary;
return abis_rsl_sendmsg(msg);
}
int rsl_forward_layer3_info(struct gsm_lchan *lchan, const uint8_t *l3_info, uint8_t l3_info_len)
{
struct msgb *msg;