2.103. util module

test framework utilities

class util.ForeignAddressFactory

Bases: object

count = 0
get_ip4()
net = '10.10.10.0/24'
net_template = '10.10.10.{}'
prefix_len = 24
class util.Host(mac=None, ip4=None, ip6=None, ip6_ll=None)

Bases: object

Generic test host “connected” to VPPs interface.

bin_mac

MAC address

ip4

IPv4 address - string

ip4n

IPv4 address of remote host - raw, suitable as API parameter.

ip6

IPv6 address - string

ip6_ll

IPv6 link-local address - string

ip6n

IPv6 address of remote host - raw, suitable as API parameter.

ip6n_ll

IPv6 link-local address of remote host - raw, suitable as API parameter.

mac

MAC address

class util.L4_CONN_SIDE

Bases: object

L4_CONN_SIDE_ONE = 1
L4_CONN_SIDE_ZERO = 0
class util.L4_Conn(testcase, if1, if2, af, l4proto, port1, port2)

Bases: object

L4 ‘connection’ tied to two VPP interfaces

pkt(side, l4args={}, payload='x')
recv(side)
send(side, flags=None, payload='')
send_pingpong(side, flags1=None, flags2=None)
send_through(side, flags=None, payload='')
class util.LoggerWrapper(logger=None)

Bases: object

debug(*args, **kwargs)
error(*args, **kwargs)
class util.NumericConstant(value)

Bases: object

desc_dict = {}
util.check_core_path(logger, core_path)
util.fragment_rfc791(packet, fragsize, _logger=None)

Fragment an IPv4 packet per RFC 791 :param packet: packet to fragment :param fragsize: size at which to fragment :note: IP options are not supported :returns: list of fragments

util.fragment_rfc8200(packet, identification, fragsize, _logger=None)

Fragment an IPv6 packet per RFC 8200 :param packet: packet to fragment :param fragsize: size at which to fragment :note: IP options are not supported :returns: list of fragments

util.get_core_path(tempdir)
util.get_core_pattern()
util.ip4_range(ip4, s, e)
util.ip4n_range(ip4n, s, e)
util.ip6_normalize(ip6)
util.is_core_present(tempdir)
util.mk_ll_addr(mac)
util.ppc(headline, capture, limit=10)

Return string containing ppp() printout for a capture.

Parameters

  • headline – printed as first line of output

  • capture – packets to print

  • limit – limit the print to # of packets

util.ppp(headline, packet)

Return string containing the output of scapy packet.show() call.

util.reassemble4(listoffragments)
util.reassemble4_core(listoffragments, return_ip)
util.reassemble4_ether(listoffragments)