mirror of
https://github.com/xdp-project/bpf-examples.git
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9337d2ff8a
This example demonstrates how to write a simple eBPF Qdisc classifier that classifies flows depending on their destination TCP port. The example script, runner.sh shows how you can use the eBPF Qdisc classifier and implement the same functionality using u32. The script creates two network namespaces called Left and Right, representing two different hosts. The script then illustrates the classifiers in action using iperf3 by starting clients on the Left namespace that connect to iperf3 servers on the Right namespace. The Qdisc classifiers give TCP ports 8080 and 8081 a high rate limit, while TCP port 8082 represents all other traffic capped at 20 Mbps. Signed-off-by: Frey Alfredsson <freysteinn@freysteinn.com>
30 lines
623 B
Bash
Executable File
30 lines
623 B
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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# This is not an autoconf generated configure
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#
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# Output file which is input to Makefile
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CONFIG=config.mk
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# Assume tc is in $PATH
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TC=tc
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check_tc_libbpf()
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{
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tc_version=$($TC -V)
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if echo $tc_version | grep -q libbpf; then
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libbpf_version=${tc_version##*libbpf }
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echo "HAVE_TC_LIBBPF:=y" >> $CONFIG
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echo "BPF_CFLAGS += -DHAVE_TC_LIBBPF" >> $CONFIG
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echo "yes ($libbpf_version)"
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else
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echo "no"
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fi
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}
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echo "# Generated config" > $CONFIG
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echo "Detecting available features on system"
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echo -n " - libbpf support in tc tool: "
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check_tc_libbpf
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