fix: Fix bug that UDP packet loss is serious when transparent transmission

xcguang · xcguang · commit 39daa7d789a5 · 2017-06-13T15:41:18.000+08:00
See TW13224!
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
@@ -33,6 +33,8 @@ CONFIG_FREERTOS_HZ=1000
 CONFIG_LWIP_SO_REUSE=y
 CONFIG_LWIP_SO_RCVBUF=y
 CONFIG_LWIP_DHCP_MAX_NTP_SERVERS=3
+CONFIG_LWIP_IP_FRAG=y
+CONFIG_LWIP_IP_REASSEMBLY=y
 CONFIG_TCP_MAXRTX=6
 CONFIG_TCP_SYNMAXRTX=3
 
