Add ebpf bandwidth monitoring

firewall/interception/ebpf/programs/update.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# Version of libbpf to fetch headers from
+LIBBPF_VERSION=1.2.0
+
+# The headers we want
+prefix=libbpf-"$LIBBPF_VERSION"
+headers=(
+    "$prefix"/src/bpf_core_read.h
+    "$prefix"/src/bpf_helper_defs.h
+    "$prefix"/src/bpf_helpers.h
+    "$prefix"/src/bpf_tracing.h
+)
+
+# Fetch libbpf release and extract the desired headers
+curl -sL "https://github.com/libbpf/libbpf/archive/refs/tags/v${LIBBPF_VERSION}.tar.gz" | \
+    tar -xz --xform='s#.*/#bpf/#' "${headers[@]}"