def address_pair(n: Node, use_v4=True, use_v6=True) \
-> Tuple[Optional[str], Optional[str]]:
"""Returns a tuple (ip, ip6) with ip/ip6 being one of the IPv4/IPv6
addresses of the node n"""
from .link import IPIntf # Prevent circular imports
v4_str = v6_str = None
for itf in n.intfList():
# Mininet switches have a loopback interface
# declared as an Intf.
# This object does not have ips() or ip6s() methods.
if not isinstance(itf, IPIntf):
continue
if use_v4 and v4_str is None:
itf.updateIP()
v4 = next(itf.ips(), None)
v4_str = v4.ip.compressed if v4 is not None else v4
if use_v6 and v6_str is None:
itf.updateIP6()
v6 = next(itf.ip6s(exclude_lls=True), None)
v6_str = v6.ip.compressed if v6 is not None else v6
if (not use_v4 or v4_str is not None) \
and (not use_v6 or v6_str is not None):
break
return v4_str, v6_str
def realIntfList(n: Node) -> List['IPIntf']:
"""Return the list of interfaces of node n excluding loopback"""
return [i for i in n.intfList() if i.name != 'lo']
