From ccb42d00b7e8f425d3274af7aafa512e4b11276f Mon Sep 17 00:00:00 2001
From: yunjieguo <yunjieguo@tencent.com>
Date: Fri, 10 Feb 2023 17:27:46 +0800
Subject: [PATCH] check dtls

---
 sdpinfo.go | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/sdpinfo.go b/sdpinfo.go
index 9e20bc8..1c84228 100644
--- a/sdpinfo.go
+++ b/sdpinfo.go
@@ -385,12 +385,14 @@ func (s *SDPInfo) String() string {
 		mediaMap.IceUfrag = s.GetICE().GetUfrag()
 		mediaMap.IcePwd = s.GetICE().GetPassword()
 
-		mediaMap.Fingerprint = &transform.FingerprintStruct{
-			Type: s.GetDTLS().GetHash(),
-			Hash: s.GetDTLS().GetFingerprint(),
-		}
+		if s.GetDTLS() != nil {
+			mediaMap.Fingerprint = &transform.FingerprintStruct{
+				Type: s.GetDTLS().GetHash(),
+				Hash: s.GetDTLS().GetFingerprint(),
+			}
 
-		mediaMap.Setup = s.GetDTLS().GetSetup().String()
+			mediaMap.Setup = s.GetDTLS().GetSetup().String()
+		}
 
 		for _, codec := range media.GetCodecs() {