From 1b322bd952c814c63c2c151f7ad62e74d45afa66 Mon Sep 17 00:00:00 2001
From: Michael Jerris <mike@jerris.com>
Date: Mon, 4 May 2015 11:23:33 -0400
Subject: [PATCH] FS-7425: #resolve dhparams might not be present, causing a
 seg.  Make sure they are there before we apply them

---
 src/switch_rtp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/switch_rtp.c b/src/switch_rtp.c
index 81f98585fc..0416d153d3 100644
--- a/src/switch_rtp.c
+++ b/src/switch_rtp.c
@@ -3127,8 +3127,10 @@ SWITCH_DECLARE(switch_status_t) switch_rtp_add_dtls(switch_rtp_t *rtp_session, d
 	bio = BIO_new_file(dtls->pem, "r");
 	dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
 	BIO_free(bio);
-	SSL_CTX_set_tmp_dh(dtls->ssl_ctx, dh);
-	DH_free(dh);
+	if (dh) {
+		SSL_CTX_set_tmp_dh(dtls->ssl_ctx, dh);
+		DH_free(dh);
+	}
 
 	SSL_CTX_set_mode(dtls->ssl_ctx, SSL_MODE_AUTO_RETRY);