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平台是自己做的板子6657。基于bios和ndk开发程序。用recv进行接收时，短包可以顺利接收。超长包有时候能接收，有时候返回值为-1。
请各位专家帮忙提供个思路
谢谢
测试了一下，接收长度最长1456，多一个，返回值都是-1
要支持Jumbo packet的话需要做一些修改，具体参考
http://processors.wiki.ti.com/index.php/Enabling_Jumbo_Packet_Support_for_C6678
http://processors.wiki.ti.com/index.php/Network_Developers_Kit_FAQ
