sccp_sap_up(): ignore PCSTATE.ind

Silence the error log about "unknown" PCSTATE prim.

Todo / coming up: instead of ignoring, detect a Destination Unavailable
from prim->u.pcstate and disconnect all conns with that particular CN
link.

Depends: libosmo-sccp If381f537ab91af1feef7f0e51921217f27e18e6a
Change-Id: I547387a5cc14ccb506be04ac785e6807fc4e6a96
---
M TODO-RELEASE
M src/osmo-hnbgw/hnbgw_cn.c
2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/TODO-RELEASE b/TODO-RELEASE
index 84cc2ea..cec63db 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -9,3 +9,4 @@
 #library	what		description / commit summary line
 osmo-hnbgw	cfg		config deprecated: 'sccp cr max-payload-len <0-999999>'
 libosmo-sigtran	>=1.7.0		Ensure SCCP CR max payload length of 130 bytes is enforced.
+				Uses osmo_scu_prim_hdr_name_c()
diff --git a/src/osmo-hnbgw/hnbgw_cn.c b/src/osmo-hnbgw/hnbgw_cn.c
index 731c758..856bf79 100644
--- a/src/osmo-hnbgw/hnbgw_cn.c
+++ b/src/osmo-hnbgw/hnbgw_cn.c
@@ -430,6 +430,10 @@
 	case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION):
 		rc = handle_cn_disc_ind(cnlink, &prim->u.disconnect, oph);
 		break;
+	case OSMO_PRIM(OSMO_SCU_PRIM_N_PCSTATE, PRIM_OP_INDICATION):
+		LOGP(DMAIN, LOGL_DEBUG, "Ignoring prim %s from SCCP USER SAP\n",
+		     osmo_scu_prim_hdr_name_c(OTC_SELECT, oph));
+		break;
 	default:
 		LOGP(DMAIN, LOGL_ERROR,
 			"Received unknown prim %u from SCCP USER SAP\n",

