I expect the problem is that you're doing packet.IP_TYPE, but packet is a
string, and not the part of the packet library with the IP_TYPE "constant". As
mentioned in the manual, POX convention is to import the packet library as:
import pox.lib.packet as pkt
.. after which you can do pkt.IP_TYPE and it should work.
Of course, if packet is a string, the next line -- packet.next.srcip -- won't
work either. You need packet to be some sort of a packet subclass. You
haven't shown the relevant code, so I don't know what you should be doing
instead.
Also, offhand, it looks like you may be mixing usage of "msg" and "msgd".
As a sidenote: just giving the exception is generally of limited use. As the
POX FAQ states in the section about getting help, it's much more useful to post
the entire traceback.
-- Murphy
On Feb 23, 2015, at 12:00 PM, AMER <amer7...@hotmail.com> wrote:
> Thank you
> I have solved this problem but I am facing another :)
>
> with this flow match i am receiving the down error
>
> match = of.ofp_match()
> msg.match.eth_type = packet.IP_TYPE
> msg.match.nw_src = packet.next.srcip
> msgd.idle_timeout = idle_timeout
> msgd.hard_timeout = hard_timeout
> msgd.priority = priority
> msgd.actions.append(of.ofp_action_nw_addr.set_dst(packet.next.dstip))
> msgd.actions.append(of.ofp_action_output(port = lport))
> msgd.buffer_id = buf
> core.openflow.sendToDPID(dstsw, msgd)
>
> AttributeError: 'str' object has no attribute 'IP_TYPE'
>
> Thank you
>
> Eng Amer Alghadhban
> COE
> SANS-GCFW
> CEH, SCNP, CCNA
>
>
> From: amer7...@hotmail.com
> To: murphy.mccau...@gmail.com; pox-dev@lists.noxrepo.org
> Date: Mon, 23 Feb 2015 17:53:57 +0000
> Subject: Re: [pox-dev] Install a flow in for loop
>
> Hello,
> I have removed the index [i], but still nothing installed !!?
>
> Best regards,
>
> Eng Amer Alghadhban
> COE
> SANS-GCFW
> CEH, SCNP, CCNA
>
>
> From: amer7...@hotmail.com
> To: murphy.mccau...@gmail.com; pox-dev@lists.noxrepo.org
> Date: Mon, 23 Feb 2015 17:08:50 +0000
> Subject: [pox-dev] Install a flow in for loop
>
> hello,
>
> i want to install a flow table like the following:
> But it is not installing
> for i in range(0,3):
> msg[i] = of.ofp_flow_mod()
> msg[i].idle_timeout = 100
> msg[i].hard_timeout = 120
> msg[i].match.eth_type = packet.IP_TYPE
> msg[i].match.eth_src = packet.src
> msg[i].match.eth_dst = packet.dst
> msg[i].match.ip_dst = dst[i] # proactive port based ip
> msg[i].actions.append(of.ofp_action_output(port = i+1))
> msgs = str(msg).strip('[]')
> self.connection.send(msgs)
>
> Best regards,
>
> Eng Amer Alghadhban
> COE
> SANS-GCFW
> CEH, SCNP, CCNA
