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https://github.com/xdp-project/bpf-examples.git
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fed8da5072f55f1d23e7de31065355f5982dd958
this code is from kernel bpf selftests xdp synproxy, removed the tc part for simplicity, shows an exmaple of using libxdp to attach xdp synproxy program on network interface. if port is not in allowed ports, the packet will be dropped by xdp synproxy by default, this would break tcp connections to ports that user does not want to do synproxy, change the default to allow connection pass through. Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
Practical BPF examples
This git repository contains a diverse set of practical BPF examples that solve (or demonstrate) a specific use-case using BPF.
It is meant to ease doing rapid prototyping and development, writing C-code BPF programs using libbpf. The goal is to make it easier for developers to get started coding.
Many developers struggle to get a working BPF build environment. The repo enviroment makes it easy to build/compile BPF programs by doing the necessary libbpf setup transparently and detect missing compile dependencies (via the configure script). It is a declared goal to make BPF programming more consumable by detecting and reporting issues (when possible).
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