#!/usr/bin/env python
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# Copyright (c) PLUMgrid, Inc.
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# Licensed under the Apache License, Version 2.0 (the "License")
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from ctypes import c_ushort, c_int, c_ulonglong
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from netaddr import IPAddress
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from bcc import BPF
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from pyroute2 import IPRoute
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from socket import socket, AF_INET, SOCK_DGRAM
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import sys
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from time import sleep
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from unittest import main, TestCase
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arg1 = sys.argv.pop(1)
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S_EOP = 1
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S_ETHER = 2
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S_ARP = 3
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S_IP = 4
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class TestBPFSocket(TestCase):
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def setUp(self):
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b = BPF(src_file=arg1, debug=0)
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ether_fn = b.load_func("parse_ether", BPF.SCHED_CLS)
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arp_fn = b.load_func("parse_arp", BPF.SCHED_CLS)
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ip_fn = b.load_func("parse_ip", BPF.SCHED_CLS)
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eop_fn = b.load_func("eop", BPF.SCHED_CLS)
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ip = IPRoute()
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ifindex = ip.link_lookup(ifname="eth0")[0]
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ip.tc("add", "sfq", ifindex, "1:")
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ip.tc("add-filter", "bpf", ifindex, ":1", fd=ether_fn.fd,
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name=ether_fn.name, parent="1:", action="ok", classid=1)
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self.jump = b.get_table("jump", c_int, c_int)
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self.jump[c_int(S_ARP)] = c_int(arp_fn.fd)
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self.jump[c_int(S_IP)] = c_int(ip_fn.fd)
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self.jump[c_int(S_EOP)] = c_int(eop_fn.fd)
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self.stats = b.get_table("stats", c_int, c_ulonglong)
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def test_jumps(self):
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udp = socket(AF_INET, SOCK_DGRAM)
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udp.sendto(b"a" * 10, ("172.16.1.1", 5000))
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udp.close()
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self.assertGreater(self.stats[c_int(S_IP)].value, 0)
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self.assertGreater(self.stats[c_int(S_ARP)].value, 0)
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self.assertGreater(self.stats[c_int(S_EOP)].value, 1)
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if __name__ == "__main__":
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main()
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