test_1.py 文件源码

def test_ttl_cases(exp_src_mac, exp_dst_mac, port_interface_mapping, a):

    fwd_pkt1 = Ether() / IP(dst='10.1.0.1') / TCP(sport=5793, dport=80)
    fwd_pkt2 = Ether() / IP(dst='10.1.0.34', ttl =1) / TCP(sport=5793, dport=80)
    fwd_pkt3 = Ether() / IP(dst='10.1.0.32', ttl=0) / TCP(sport=5793, dport=80)

    exp_pkt1 = (Ether(src=exp_src_mac, dst=exp_dst_mac) /
                IP(dst='10.1.0.1', ttl=fwd_pkt1[IP].ttl-1) / TCP(sport=5793, dport=80))

    pack = send_pkts_and_capture(port_interface_mapping, [{'port': 0, 'packet': fwd_pkt1},
                                                          {'port': 1, 'packet': fwd_pkt2},
                                                          {'port': 1, 'packet': fwd_pkt3}])
    input_ports = {0, 1}
    output = create_port_seq_list([{'port': 2, 'packet': exp_pkt1}], pack, input_ports)
    return output