> Many thanks for your reply, now I've tried some tests and they work.
> Unfortunately, I'm experiencing another issue: I want my switch to extract
> IPv6 ND informations, but the console reply back to me with this error when
> I execute the following code (the omitted portion of code is the same of
> simple_switch.py example)
>
> [ERROR]
> hub: uncaught exception: Traceback (most recent call last):
> File "/home/user/ryu/ryu/lib/hub.py", line 48, in _launch
> func(*args, **kwargs)
> File "/home/user/ryu/ryu/base/app_manager.py", line 110, in _event_loop
> handler(ev)
> File "/home/user/ryu/ryu/app/simple_switch03BACKUP.py", line 68, in
> _packet_in
> icimpv6 = pkt.get_protocol(icmpv6.nd_neighbor)
> File "/home/user/ryu/ryu/lib/packet/packet.py", line 104, in get_protocol
> result = self.get_protocols(protocol)
> File "/home/user/ryu/ryu/lib/packet/packet.py", line 97, in get_protocols
> assert issubclass(protocol, packet_base.PacketBase)
> AssertionError
>
>
> [CODE]
>
>
> @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
>
> def _packet_in_handler(self, ev):
>
> msg = ev.msg
>
> datapath = msg.datapath
>
> ofproto = datapath.ofproto
>
>
> pkt = packet.Packet(msg.data)
>
> eth = pkt.get_protocol(ethernet.ethernet)
>
>
> dst = eth.dst
>
> src = eth.src
>
>
> try:
>
> ippiv6 = pkt.get_protocol(ipv6.ipv6)
>
> ipv6s = ippiv6.src
>
> except:
>
> ipv6s = "not assigned yet"
>
>
> icimpv6 = pkt.get_protocol(icmpv6.icmpv6)
>
> #icmpv6type = icimpv6.type_
>
>
>
> options = pkt.get_protocol(icmpv6.nd_option_pi)
i think you need something like this.
i = pkt.get_protocol(icmpv6.icmpv6)
if i:
data = i.data
if isinstance(data, icmpv6.nd_option_pi):
:
:
YAMAMOTO Takashi
>
> if (icmpv6type == 134):
> prefixes = option.prefix
>
> self.logger.info("[ALERT] packet contains a Router Advertisement!")
>
> self.logger.info("Prefix announced: %s", prefixes)
>
>
>
> dpid = datapath.id
>
> self.mac_to_port.setdefault(dpid, {})
>
>
> self.logger.info("packet in %s ipv6:%s %s %s %s", dpid, ipv6s, src,
> dst, msg.in_port)
>
>
> # learn a mac address to avoid FLOOD next time.
>
> self.mac_to_port[dpid][src] = msg.in_port
>
>
> ...
>
> How can I fix this?
>
> Many thanks for your time
> Gabriele
>
>
> 2013/10/15 FUJITA Tomonori <[email protected]>
>
>> Hi,
>>
>> On Sun, 13 Oct 2013 15:58:14 +0200
>> Gabriele Gerbino <[email protected]> wrote:
>>
>> > Hi there, I'm new to this ML and to OF in general. I was trying to gain
>> > confidence with ryu but I found myself stucked so soon. I wanted to
>> modify
>> > the "simple_switch.py" example in order to make it able to learn IP
>> > addresses too and handle packets based on them. In particular, my idea is
>> > to use ryu to avoid some ipv6 security issues (rogue RA). Is there anyone
>> > who can give me some instructions and/or examples of ip packet handlers?
>>
>> I updated simple_switch.py. Packet library enables you to access an IP
>> header in a packet easily. Also check out:
>>
>> http://ryu.readthedocs.org/en/latest/library_packet_ref.html
>>
>>
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