res_pjsip_rfc3326: Order of 'Reason' headers break many endpoints

ASTERISK-27554

Change-Id: If61c7faab7d2fa1031c056ed6268fe928e2391cf

diff --git a/res/res_pjsip_rfc3326.c b/res/res_pjsip_rfc3326.c
index d49a170d33db21a6a9a95a5b822202bd91595c7d..b46c3aef2e14631fb601148a42a23cf1a60203b0 100644 (file)
--- a/res/res_pjsip_rfc3326.c
+++ b/res/res_pjsip_rfc3326.c
@@ -92,12 +92,12 @@ static void rfc3326_add_reason_header(struct ast_sip_session *session, struct pj
 {
        char buf[20];
 
-       snprintf(buf, sizeof(buf), "Q.850;cause=%i", ast_channel_hangupcause(session->channel) & 0x7f);
-       ast_sip_add_header(tdata, "Reason", buf);
-
        if (ast_channel_hangupcause(session->channel) == AST_CAUSE_ANSWERED_ELSEWHERE) {
                ast_sip_add_header(tdata, "Reason", "SIP;cause=200;text=\"Call completed elsewhere\"");
        }
+
+       snprintf(buf, sizeof(buf), "Q.850;cause=%i", ast_channel_hangupcause(session->channel) & 0x7f);
+       ast_sip_add_header(tdata, "Reason", buf);
 }
 
 static void rfc3326_outgoing_request(struct ast_sip_session *session, struct pjsip_tx_data *tdata)