From aefd7fccd034d768aba2fe4f4a83b4e0453ceab8 Mon Sep 17 00:00:00 2001
From: winlin <winlin@vip.126.com>
Date: Mon, 8 Feb 2021 08:25:35 +0800
Subject: [PATCH] RTC: Fix udp recvfrom bug

---
 trunk/src/app/srs_app_listener.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/trunk/src/app/srs_app_listener.cpp b/trunk/src/app/srs_app_listener.cpp
index 849b9085e..a07ddc7cb 100755
--- a/trunk/src/app/srs_app_listener.cpp
+++ b/trunk/src/app/srs_app_listener.cpp
@@ -316,6 +316,9 @@ int SrsUdpMuxSocket::recvfrom(srs_utime_t timeout)
 {
     fromlen = sizeof(from);
     nread = srs_recvfrom(lfd, buf, nb_buf, (sockaddr*)&from, &fromlen, timeout);
+    if (nread <= 0) {
+        return nread;
+    }
 
     // Reset the fast cache buffer size.
     cache_buffer_->set_size(nread);