These instructions are for a Mac. You'll need a recent LLVM installation that can target bpfeb and bpfel. By default the Makefile attempts to use an LLVM installation installed by Homebrew. If you don't have an installation at /usr/local/opt/llvm/bin you can run:
brew install llvmAside from LLVM, you'll need at least go 1.17 and your PATH variable including the default location that go install writes to.
After installing go, install Cilium's bpf2go utility:
go install github.com/cilium/ebpf/cmd/bpf2go@latestOnce all dependencies are installed, run make. You can test the output binary on any of the Vagrant machines by running sudo ./ebpfun -config config.hcl in the /vagrant directory.
Since this program is just a dead-simple packet counter you can test the program output by running the default configuration and pinging your loopback interface. While running sudo ping -f localhost and sudo ping -f ::1 you should see something like the following output:
vagrant@ubuntu-jammy:/vagrant$ sudo ./ebpfun -config config.hcl
2022/03/07 19:11:32 Packets received: IP - 26650, IPv6 - 0
2022/03/07 19:11:33 Packets received: IP - 100540, IPv6 - 0
2022/03/07 19:11:36 Packets received: IP - 100540, IPv6 - 101651
2022/03/07 19:11:37 Packets received: IP - 100540, IPv6 - 182532