From 991691f8df4c1fc14bd634ca06dfae9b51dd7d0f Mon Sep 17 00:00:00 2001
From: Sergey Kostanbaev <sergey.kostanbaev@gmail.com>
Date: Sat, 7 Nov 2015 21:25:54 +0300
Subject: [PATCH] ussd_proxy: add content-type sip tag in bye for 3rd party
 software workaround

---
 openbsc/src/reg-proxy/ussd_proxy.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/openbsc/src/reg-proxy/ussd_proxy.c b/openbsc/src/reg-proxy/ussd_proxy.c
index fa46fa410..5488f8055 100644
--- a/openbsc/src/reg-proxy/ussd_proxy.c
+++ b/openbsc/src/reg-proxy/ussd_proxy.c
@@ -833,7 +833,10 @@ static int rx_sup_uss_message(isup_connection_t *sup_conn, const uint8_t* data,
 			return 0;
 		}
 
-		nua_bye(op->handle, TAG_END());
+		// NOTE: Add ContentType for 3rd party software workaround, it's not needed by standard
+		nua_bye(op->handle,
+			SIPTAG_CONTENT_TYPE_STR("application/vnd.3gpp.ussd+xml"),
+			TAG_END());
 		break;
 
 	default: