Demo using Linux BPF XDP to drop packet

Описание к видео Demo using Linux BPF XDP to drop packet

A quick demo of BPF XDP program to drop packet, sample code here:https://github.com/vincentmli/bpf-sam...
/*
Sample XDP/tc program, sets the TCP PSH flag on every RATIO packet.
compile it with:
clang -O2 -emit-llvm -c tcp_ack.c -o - |llc -march=bpf -filetype=obj -o tcp_ack.o
attach it to a device with XDP as:
ip link set dev lo xdp object tcp_ack.o verbose
attach it to a device with tc as:
tc qdisc add dev eth0 clsact
tc filter add dev eth0 egress matchall action bpf object-file tcp_ack.o
replace the bpf with
tc filter replace dev eth0 egress matchall action bpf object-file tcp_ack.o
*/

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