Fix ZRTP

src/switch_rtp.c

@@ -2726,14 +2726,6 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 			}
 		}
 
-		if (bytes && !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_PROXY_MEDIA) && !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_UDPTL) &&
-			rtp_session->recv_msg.header.pt != 13 && 
-			rtp_session->recv_msg.header.pt != rtp_session->recv_te && 
-			(!rtp_session->cng_pt || rtp_session->recv_msg.header.pt != rtp_session->cng_pt) && 
-			rtp_session->recv_msg.header.pt != rtp_session->payload) {
-			/* drop frames of incorrect payload number and return CNG frame instead */
-			return_cng_frame();
-		}
 
 		if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_ENABLE_RTCP) && rtp_session->rtcp_read_pollfd) {
 			rtcp_poll_status = switch_poll(rtp_session->rtcp_read_pollfd, 1, &rtcp_fdr, 0);
@@ -2812,6 +2804,15 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 			goto end;
 		}
 
+		if (bytes && !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_PROXY_MEDIA) && !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_UDPTL) &&
+			rtp_session->recv_msg.header.pt != 13 && 
+			rtp_session->recv_msg.header.pt != rtp_session->recv_te && 
+			(!rtp_session->cng_pt || rtp_session->recv_msg.header.pt != rtp_session->cng_pt) && 
+			rtp_session->recv_msg.header.pt != rtp_session->payload) {
+			/* drop frames of incorrect payload number and return CNG frame instead */
+			return_cng_frame();
+		}
+
 		if (!bytes && (io_flags & SWITCH_IO_FLAG_NOBLOCK)) {
 			rtp_session->missed_count = 0;
 			ret = 0;