silence error message for N-STATE prim

We ignore the N-STATE prim, so don't error about it.

While at it, improve the "unhandled" error message (according to code
review).

Related: SYS#6952
Change-Id: Ic353840a7b2e32c54c2732f58836776a5eddb220
---
M src/osmo-bsc/osmo_bsc_sigtran.c
1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/osmo-bsc/osmo_bsc_sigtran.c b/src/osmo-bsc/osmo_bsc_sigtran.c
index a1aaaaf..224e2c6 100644
--- a/src/osmo-bsc/osmo_bsc_sigtran.c
+++ b/src/osmo-bsc/osmo_bsc_sigtran.c
@@ -363,9 +363,16 @@
 		handle_pcstate_ind(osmo_sccp_get_ss7(sccp), &scu_prim->u.pcstate);
 		break;
 
+	case OSMO_PRIM(OSMO_SCU_PRIM_N_STATE, PRIM_OP_INDICATION):
+		LOGP(DMSC, LOGL_DEBUG, "SCCP-User-SAP: Ignoring %s.%s\n",
+		     osmo_scu_prim_type_name(oph->primitive),
+		     get_value_string(osmo_prim_op_names, oph->operation));
+		break;
+
 	default:
-		LOGP(DMSC, LOGL_ERROR, "Unhandled SIGTRAN operation %s on primitive %s\n",
-		     get_value_string(osmo_prim_op_names, oph->operation), osmo_scu_prim_type_name(oph->primitive));
+		LOGP(DMSC, LOGL_ERROR, "SCCP-User-SAP: Unhandled %s.%s\n",
+		     osmo_scu_prim_type_name(oph->primitive),
+		     get_value_string(osmo_prim_op_names, oph->operation));
 		break;
 	}
 

