How to reliably generate Ethernet frame errors in software?

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If you’re working in C, you can send a raw Ethernet frame using socket(AF_PACKET, SOCK_RAW, ...), and passing it a pointer to a raw buffer that you’ve generated yourself (e.g. by following the frame layout at wikipedia ).

It’s been a long time since I’ve done this, so I’m not going to attempt to write a representative code snippet…

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