Update ping.bpf.c to match README

lizrice / learning-ebpf

Learning eBPF, published by O'Reilly - out now! Here's where you'll find a VM config for the examples, and more

https://www.amazon.com/Learning-eBPF-Programming-Observability-Networking/dp/1098135121

Apache License 2.0

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Update ping.bpf.c to match README #41

Open wkwkes opened 4 months ago

wkwkes commented 4 months ago

Hi! I noticed that ping.bpf.c was always returning XDP_PASS, which didn't match the description in the README. I updated it to return XDP_DROP instead. Hope this small fix helps!