Change in osmo-pcu[master]: Support Gb PAGING-CS

[pespin]

pespin has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-pcu/+/16537 )


Change subject: Support Gb PAGING-CS
......................................................................

Support Gb PAGING-CS

The paging is sent over PACCH towards MS with an active TBF.

Related: OS#2406
Change-Id: I9501e02e1d7f6944497e724dbccb9a19c3f5221f
---
M src/gprs_bssgp_pcu.cpp
1 file changed, 30 insertions(+), 1 deletion(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-pcu refs/changes/37/16537/1

diff --git a/src/gprs_bssgp_pcu.cpp b/src/gprs_bssgp_pcu.cpp
index 67c8653..983c22c 100644
--- a/src/gprs_bssgp_pcu.cpp
+++ b/src/gprs_bssgp_pcu.cpp
@@ -173,6 +173,33 @@
 			ms_class, egprs_ms_class, delay_csec, data, len);
 }
 
+static int gprs_bssgp_pcu_rx_paging_cs(struct msgb *msg, struct tlv_parsed *tp)
+{
+	uint8_t identity_lv[9];
+	uint8_t *chan_needed = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_CHAN_NEEDED);
+
+	if (TLVP_PRESENT(tp, BSSGP_IE_TMSI)) {
+		identity_lv[0] = TLVP_LEN(tp, BSSGP_IE_TMSI);
+		if (identity_lv[0] >= sizeof(identity_lv)) {
+			LOGP(DBSSGP, LOGL_NOTICE, "TMSI IE too big (%" PRIu8 ")\n", identity_lv[0]);
+			return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg);
+		}
+		memcpy(&identity_lv[1], TLVP_VAL(tp, BSSGP_IE_TMSI), identity_lv[0]);
+	} else if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { /* Use IMSI if TMSI not available: */
+		identity_lv[0] = TLVP_LEN(tp, BSSGP_IE_IMSI);
+		if (identity_lv[0] >= sizeof(identity_lv)) {
+			LOGP(DBSSGP, LOGL_NOTICE, "IMSI IE too big (%" PRIu8 ")\n", identity_lv[0]);
+			return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg);
+		}
+		memcpy(&identity_lv[1], TLVP_VAL(tp, BSSGP_IE_IMSI), identity_lv[0]);
+	} else {
+		LOGP(DBSSGP, LOGL_ERROR, "No IMSI\n");
+		return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg);
+	}
+
+	return BTS::main_bts()->add_paging(chan_needed ? *chan_needed : 0, identity_lv);
+}
+
 static int gprs_bssgp_pcu_rx_paging_ps(struct msgb *msg, struct tlv_parsed *tp)
 {
 	uint8_t identity_lv[9];
@@ -311,6 +338,9 @@
 			the_pcu.bvc_reset = 1;
 		bvc_timeout(NULL);
 		break;
+	case BSSGP_PDUT_PAGING_CS:
+		gprs_bssgp_pcu_rx_paging_cs(msg, tp);
+		break;
 	case BSSGP_PDUT_PAGING_PS:
 		gprs_bssgp_pcu_rx_paging_ps(msg, tp);
 		break;
@@ -323,7 +353,6 @@
 		break;
 	case BSSGP_PDUT_SUSPEND_NACK:
 	case BSSGP_PDUT_RESUME_NACK:
-	case BSSGP_PDUT_PAGING_CS:
 	case BSSGP_PDUT_FLUSH_LL:
 	case BSSGP_PDUT_SGSN_INVOKE_TRACE:
 		LOGP(DBSSGP, LOGL_INFO, "Rx BSSGP BVCI=%d (SIGN) PDU type %s not implemented\n",

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Gerrit-Project: osmo-pcu
Gerrit-Branch: master
Gerrit-Change-Id: I9501e02e1d7f6944497e724dbccb9a19c3f5221f
Gerrit-Change-Number: 16537
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-MessageType: newchange
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