you can do something like:
if arp.arp in Packet(msg.data):
a = arp.arp(...)
if a in Packet(msg.data):
>>> from ryu.lib.packet import packet
>>> from ryu.lib.packet import arp
>>> a = arp.arp_ip(1, 0, 0, 0, 0)
>>> p = packet.Packet()
>>> p.protocols = [a]
>>> arp.arp in p
True
>>> a in p
True
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>