gsup: add message type for osmo-epdg CEAI interface

The CEIA interface is an interface between osmo-epdg and
strongswan.
It is used by the osmo-epdg to synchronize state.

Related: OS#6091
Change-Id: I6f7c20340c99f94b1326a8a7dc99c86cf6a0dbc3
diff --git a/src/gsm/gsup.c b/src/gsm/gsup.c
index ef33ed0..4e09ac8 100644
--- a/src/gsm/gsup.c
+++ b/src/gsm/gsup.c
@@ -103,6 +103,10 @@
 
 	OSMO_VALUE_STRING(OSMO_GSUP_MSGT_ROUTING_ERROR),
 
+	OSMO_VALUE_STRING(OSMO_GSUP_MSGT_EPDG_TUNNEL_REQUEST),
+	OSMO_VALUE_STRING(OSMO_GSUP_MSGT_EPDG_TUNNEL_RESULT),
+	OSMO_VALUE_STRING(OSMO_GSUP_MSGT_EPDG_TUNNEL_ERROR),
+
 	{ 0, NULL }
 };
 
@@ -911,6 +915,7 @@
 	{ OSMO_GSUP_MESSAGE_CLASS_SMS, "SMS" },
 	{ OSMO_GSUP_MESSAGE_CLASS_USSD, "USSD" },
 	{ OSMO_GSUP_MESSAGE_CLASS_INTER_MSC, "Inter-MSC" },
+	{ OSMO_GSUP_MESSAGE_CLASS_IPSEC_EPDG, "IPsec-ePDG" },
 	{}
 };