I'm learning embedded systems recently, and there are some problems in the USB code that I don't know what they mean? Where "*paddr = (unsigned char *)(addr - 4);" Original text void Usb_Get_Data(unsi
I set the non-fragmentation flag in the IP header to 1 in the Ping packet I sent, which means that fragmentation is not allowed when sending. Will such packets be discarded by the router or switch? If