'@param tunnelRemote: The source address for UDP datagrams originated
from this helper.  This is an IPv4 dotted-quad string.
@type tunnelRemote: L{bytes}
@param tunnelLocal: The destination address for UDP datagrams
originated from this helper.  This is an IPv4 dotted-quad string.
@type tunnelLocal: L{bytes}
@param pi: A flag indicating whether this helper will generate and
consume a protocol information (PI) header.
@type pi: L{bool}'

def __init__(self, tunnelRemote, tunnelLocal, pi):

    self.tunnelRemote = tunnelRemote
    self.tunnelLocal = tunnelLocal
    self.pi = pi
