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#!/usr/bin/python
# Copyright (c) PLUMgrid, Inc.
# Licensed under the Apache License, Version 2.0 (the "License")
from bcc import BPF
from pyroute2 import IPRoute
ipr = IPRoute()
text = """
int hello(struct __sk_buff *skb) {
return 1;
}
"""
try:
b = BPF(text=text, debug=0)
fn = b.load_func("hello", BPF.SCHED_CLS)
ipr.link("add", ifname="t1a", kind="veth", peer="t1b")
idx = ipr.link_lookup(ifname="t1a")[0]
ipr.tc("add", "ingress", idx, "ffff:")
ipr.tc("add-filter", "bpf", idx, ":1", fd=fn.fd,
name=fn.name, parent="ffff:", action="ok", classid=1)
ipr.tc("add", "sfq", idx, "1:")
ipr.tc("add-filter", "bpf", idx, ":1", fd=fn.fd,
name=fn.name, parent="1:", action="ok", classid=1)
finally:
if "idx" in locals(): ipr.link("del", index=idx)
print("BPF tc functionality - SCHED_CLS: OK")