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板子上发出了DHCP发现数据包,路由器无响应

我用网口发出了DHCP  discover数据包,用抓包工具也抓到了完整的数据包,基本看不出啥错误,但是路由器按理说要返回一个DHCP  offer数据包,但路由器实际无任何响应,我猜测还是自己这边的代码问题,但不知道怎么下手,我跑的是裸机程序