do not allow an rtp message with zero type (issue #5749)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@7232 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/rtp.c b/rtp.c
index 653355e..0c475ed 100644 (file)
--- a/rtp.c
+++ b/rtp.c
@@ -299,7 +299,7 @@ static struct ast_frame *process_rfc2833(struct ast_rtp *rtp, unsigned char *dat
                }
                resp = 0;
                duration = 0;
-       } else if(rtp->dtmfduration && (duration < rtp->dtmfduration)) {
+       } else if (rtp->resp && rtp->dtmfduration && (duration < rtp->dtmfduration)) {
                f = send_dtmf(rtp);
        }
        if (!(event_end & 0x80))