From 9336246f00ab6ab29c5511a6991a148512da554a Mon Sep 17 00:00:00 2001
From: wangyu- <wangyucn@gmail.com>
Date: Sat, 18 Nov 2017 00:01:21 -0600
Subject: [PATCH] fixed a possible MTU issue when redundant num=0

---
 fec_manager.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fec_manager.cpp b/fec_manager.cpp
index e6702cb..18b54d6 100644
--- a/fec_manager.cpp
+++ b/fec_manager.cpp
@@ -282,7 +282,10 @@ int fec_encode_manager_t::input(char *s,int len/*,int &is_first_packet*/)
     			int best_data_num=fec_data_num;
     			for(int i=1;i<actual_data_num;i++)
     			{
-    				u32_t new_len=(blob_encode.get_shard_len(i,0)+header_overhead)*(i+fec_redundant_num);
+    				u32_t shard_len=blob_encode.get_shard_len(i,0);
+    				if(shard_len>(u32_t)fec_mtu) continue;
+
+    				u32_t new_len=(shard_len+header_overhead)*(i+fec_redundant_num);
     				if(new_len<best_len)
     				{
     					best_len=new_len;