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ASCI: Add decoding of VGCS/VBS A-interface messages 

Change-Id: I77b4d072d76039b1889ae4bba4a602e956405eb8
Related: OS#4852
This commit is contained in:
Andreas Eversberg 2023-06-30 09:35:52 +02:00
parent 1f05282243
commit 62b9c83721
1 changed files with 115 additions and 0 deletions
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115
src/osmo-bsc/osmo_bsc_bssap.c
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@ -1298,6 +1298,101 @@ static int bssmap_handle_common_id(struct gsm_subscriber_connection *conn,
return 0;
}
/* Handle (VGCS) UPLINK REQUEST ACKNOWLEDGE:
*
* See 3GPP TS 48.008 §3.2.1.58
*/
static int bssmap_handle_uplink_rqst_acknowledge(struct gsm_subscriber_connection *conn,
struct msgb *msg, unsigned int length)
{
struct tlv_parsed tp;
if (osmo_bssap_tlv_parse(&tp, msg->l4h + 1, length - 1) < 0) {
LOGPFSML(conn->fi, LOGL_ERROR, "%s(): tlv_parse() failed\n", __func__);
return -1;
}
if (conn->vgcs_call.fi)
osmo_fsm_inst_dispatch(conn->vgcs_call.fi, VGCS_EV_MSC_ACK, NULL);
return 0;
}
/* Handle (VGCS) UPLINK REJECT COMMAND message.
*
* See 3GPP TS 48.008 §3.2.1.61
*/
static int bssmap_handle_uplink_reject_cmd(struct gsm_subscriber_connection *conn,
struct msgb *msg, unsigned int length)
{
struct tlv_parsed tp;
if (osmo_bssap_tlv_parse(&tp, msg->l4h + 1, length - 1) < 0) {
LOGPFSML(conn->fi, LOGL_ERROR, "%s(): tlv_parse() failed\n", __func__);
return -1;
}
if (conn->vgcs_call.fi)
osmo_fsm_inst_dispatch(conn->vgcs_call.fi, VGCS_EV_MSC_REJECT, NULL);
return 0;
}
/* Handle (VGCS) UPLINK RELEASE COMMAND message, MSC indicating an error to us:
*
* See 3GPP TS 48.008 §3.2.1.62
*/
static int bssmap_handle_uplink_release_cmd(struct gsm_subscriber_connection *conn,
struct msgb *msg, unsigned int length)
{
struct tlv_parsed tp;
if (osmo_bssap_tlv_parse(&tp, msg->l4h + 1, length - 1) < 0) {
LOGPFSML(conn->fi, LOGL_ERROR, "%s(): tlv_parse() failed\n", __func__);
return -1;
}
if (conn->vgcs_call.fi)
osmo_fsm_inst_dispatch(conn->vgcs_call.fi, VGCS_EV_MSC_RELEASE, NULL);
return 0;
}
/* Handle (VGCS) UPLINK SEIZED COMMAND message:
*
* See 3GPP TS 48.008 §3.2.1.63
*/
static int bssmap_handle_uplink_seized_cmd(struct gsm_subscriber_connection *conn,
struct msgb *msg, unsigned int length)
{
struct tlv_parsed tp;
if (osmo_bssap_tlv_parse(&tp, msg->l4h + 1, length - 1) < 0) {
LOGPFSML(conn->fi, LOGL_ERROR, "%s(): tlv_parse() failed\n", __func__);
return -1;
}
if (conn->vgcs_call.fi)
osmo_fsm_inst_dispatch(conn->vgcs_call.fi, VGCS_EV_MSC_SEIZE, NULL);
return 0;
}
/* Handle VGCS/VBS ADDITIONAL INFO message:
*
* See 3GPP TS 48.008 §3.2.1.78
*/
static int bssmap_handle_vgcs_addl_info(struct gsm_subscriber_connection *conn,
struct msgb *msg, unsigned int length)
{
struct tlv_parsed tp;
if (osmo_bssap_tlv_parse(&tp, msg->l4h + 1, length - 1) < 0) {
LOGPFSML(conn->fi, LOGL_ERROR, "%s(): tlv_parse() failed\n", __func__);
return -1;
}
LOGPFSML(conn->fi, LOGL_ERROR, "VGCS ADDITIONAL INFO is not supported.\n");
return 0;
}
static int bssmap_rcvmsg_udt(struct bsc_msc_data *msc,
struct msgb *msg, unsigned int length)
{
@ -1401,6 +1496,26 @@ static int bssmap_rcvmsg_dt1(struct gsm_subscriber_connection *conn,
ret = 0;
}
break;
case BSS_MAP_MSG_UPLINK_RQST_ACKNOWLEDGE:
rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_UPLINK_RQST_ACKNOWLEDGE]);
ret = bssmap_handle_uplink_rqst_acknowledge(conn, msg, length);
break;
case BSS_MAP_MSG_UPLINK_REJECT_CMD:
rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_UPLINK_REJECT_CMD]);
ret = bssmap_handle_uplink_reject_cmd(conn, msg, length);
break;
case BSS_MAP_MSG_UPLINK_RELEASE_CMD:
rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_UPLINK_RELEASE_CMD]);
ret = bssmap_handle_uplink_release_cmd(conn, msg, length);
break;
case BSS_MAP_MSG_UPLINK_SEIZED_CMD:
rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_UPLINK_SEIZED_CMD]);
ret = bssmap_handle_uplink_seized_cmd(conn, msg, length);
break;
case BSS_MAP_MSG_VGCS_ADDL_INFO:
rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_VGCS_ADDL_INFO]);
ret = bssmap_handle_vgcs_addl_info(conn, msg, length);
break;
default:
rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_UNKNOWN]);
LOGP(DMSC, LOGL_NOTICE, "Unimplemented msg type: %s\n",