acl.bess

# Copyright (c) 2016-2017, Nefeli Networks, Inc.
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import scapy.all as scapy

# Craft a packet with the specified IP addresses
def gen_packet(proto, src_ip, dst_ip):
    eth = scapy.Ether(src='02:1e:67:9f:4d:ae', dst='06:16:3e:1b:72:32')
    ip = scapy.IP(src=src_ip, dst=dst_ip)
    udp = proto(sport=10001, dport=10002)
    payload = 'helloworld'
    pkt = eth/ip/udp/payload
    return bytes(pkt)

packets = [gen_packet(scapy.UDP, '172.16.100.1', '10.0.0.1'),
           gen_packet(scapy.UDP, '172.12.55.99', '12.34.56.78'),
           gen_packet(scapy.UDP, '172.12.55.99', '10.0.0.1'),
           gen_packet(scapy.UDP, '172.16.100.1', '12.34.56.78'),
           gen_packet(scapy.TCP, '172.12.55.99', '12.34.56.78'),
           gen_packet(scapy.UDP, '192.168.1.123', '12.34.56.78'),
          ]

fw::ACL(rules=[{'src_ip': '172.12.0.0/16', 'drop': False}])

Source() -> Rewrite(templates=packets) -> fw -> Sink()