How to use is_link_up method in avocado

Best Python code snippet using avocado_python

basics.py

Source:basics.py

1from api import *2class BasicHost (HostEntity):3  """ Basic host with a ping method """4  def ping (self, dst, data=None): #dst type = BasicHost5    """ Sends a Ping packet to dst. """6    self.send(Ping(dst, data=data), flood=True)7  def handle_rx (self, packet, port):8    # print("BasicHost received packet")9    """10    Silently drops messages to nobody.11    Warns about received messages to someone besides itself.12    Prints received messages.13    Returns Pings with a Pong.14    """15    if packet.dst is NullAddress:16      # Silently drop messages not to anyone in particular17      return18    trace = ','.join((s.name for s in packet.trace))19    if packet.dst is not self:20      self.log("NOT FOR ME: %s %s" % (packet, trace), level="WARNING")21    else:22      self.log("rx: %s %s" % (packet, trace))23      if type(packet) is Ping:24        # Trace this path25        import core26        core.events.highlight_path([packet.src] + packet.trace)27        # Send a pong response28        self.send(Pong(packet), port)29class Ping (Packet):30  """ A Ping packet """31  def __init__ (self, dst, data=None):32    Packet.__init__(self, dst=dst)33    self.data = data34    self.outer_color[3] = 1 # Full opacity35    self.inner_color = [1,1,1,1] # white36  def __repr__ (self):37    d = self.data38    if d is not None:39      d = ': ' + str(d)40    else:41      d = ''42    return "<Ping %s->%s ttl:%i%s>" % (self.src.name, self.dst.name, self.ttl, d)43class Pong (Packet):44  """45  A Pong packet.  It's a returned Ping.  The original Ping is in46  the .original property.47  """48  def __init__ (self, original):49    Packet.__init__(self, dst=original.src)50    self.original = original51    # Flip colors from original52    self.outer_color = original.inner_color53    self.inner_color = original.outer_color54  def __repr__ (self):55    return "<Pong " + str(self.original) + ">"56#class DiscoveryPacket (Packet):57#    """58#    A "link up/down" packet.59#    """60#    def __init__(self, src, is_link_up):61#        Packet.__init__(self, src=src)62#        self.is_link_up = is_link_up63#64#    def __repr__ (self):65#        return "<%s from %s->%s, %s>" % (self.__class__.__name__,66#                                 self.src.name if self.src else None,67#                                 self.dst.name if self.dst else None,68#                                 self.is_link_up)69# Changed to enable link latency - Kaifei Chen(kaifei@berkeley.edu)70class DiscoveryPacket (Packet):71    """72    A "link latency change" packet.73    latency should be float("inf") if the link is down.74    """75    def __init__(self, src, latency):76        Packet.__init__(self, src=src)77        self.latency = latency78        self.is_link_up = (latency != None and latency != float("inf"))79    def __repr__ (self):80        return "<%s from %s->%s, %s, %s>" % (self.__class__.__name__,81                                 self.src.name if self.src else None,82                                 self.dst.name if self.dst else None,83                                 self.latency,84                                 self.is_link_up)85class RoutingUpdate (Packet):86    """87    A Routing Update message to use with your DVRouter implementation.88    """89    def __init__(self):90        Packet.__init__(self)91        self.paths = {}92    def add_destination(self, dest, distance):93        """94        Add a destination to announce, along with senders distance to that dest.95        """96        self.paths[dest] = distance97    def get_distance(self, dest):98        """99        Get the distance to the specified destination.100        """101        return self.paths[dest]102    def all_dests(self):103        """104        Get a list of all destinations with paths announced in this message.105        """106        return self.paths.keys()107    def str_routing_table(self):...

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