Oh Nox is also telling me this:
Traceback (most recent call last):
File "./nox/lib/util.py", line 113, in f
event.total_len, buffer_id, packet)
File "./nox/coreapps/examples/aaronswitch.py", line 182, in
packet_in_callback
self.forward(dpid, inport, packet, packet.arr, bufid)
File "./nox/coreapps/examples/aaronswitch.py", line 67, in forward
self.send_openflow_packet(dpid, packet.tostring(),openflow.OFPP_FLOOD ,
inport)
File "./nox/lib/packet/packet_base.py", line 114, in tostring
return ''.join((buf, self.next.tostring()))
File "./nox/lib/packet/packet_base.py", line 114, in tostring
return ''.join((buf, self.next.tostring()))
File "./nox/lib/packet/packet_base.py", line 109, in tostring
buf = self.hdr()
File "./nox/lib/packet/tcp.py", line 215, in hdr
packet += option.to_bytes()
File "./nox/lib/packet/tcp.py", line 78, in to_bytes
self.msg('(tcp_opt to_bytes) warning, unknown option')
AttributeError: tcp_opt instance has no attribute 'msg'
On Tue, Mar 1, 2011 at 6:18 PM, Aaron Rosen <[email protected]> wrote:
> Thanks Murphy that fixes the typeerror but I'm still not sure if the
> packets are correct because I'm not able to make a connection. In Wireshark
> for this ssh packet_in's it's saying "This frame is a suspected
> retransmission" and in tcpdump at the host that is getting these packets its
> saying:
>
>
> 18:13:48.227362 IP truncated-ip - 730 bytes missing! 130.127.39.173.59276 >
> 130.127.39.235.ssh: P 40:832(792) ack 33 win 12 <nop,nop,timestamp 9797038
> 46103242>
>
>
> Thanks,
>
> Aaron
>
>
>
> On Tue, Mar 1, 2011 at 5:39 PM, James "Murphy" McCauley <[email protected]>wrote:
>
>> Looks like the problem is in the parsing. Here's a patch:
>>
>> --- a/src/nox/lib/packet/tcp.py
>> +++ b/src/nox/lib/packet/tcp.py
>> @@ -150,7 +150,7 @@ class tcp(packet_base):
>> elif arr[i] == tcp_opt.MSS:
>> if arr[i+1] != 4:
>> raise Exception()
>> - val = struct.unpack('!H',arr[i+2:i+4])
>> + val = struct.unpack('!H',arr[i+2:i+4])[0]
>> self.options.append(tcp_opt(tcp_opt.MSS,val))
>> elif arr[i] == tcp_opt.WSOPT:
>> if arr[i+1] != 3:
>>
>> -- Murphy
>>
>> On Tue, 2011-03-01 at 17:29 -0500, Aaron Rosen wrote:
>> > Hi Murphy,
>> >
>> > I'm just trying to connect to a computer using ssh so when I do ssh
>> > 130.127.39.235 I see these typeerror messages. I do not to anything
>> > with the packet when it gets to the controller except tell it to
>> > flood.
>> >
>> > The MSS of these packets are 1460 in the packet_in event.
>> >
>> > Any idea?
>> >
>> > Thanks,
>> >
>> > Aaron
>> >
>> >
>> > On Tue, Mar 1, 2011 at 3:51 PM, James "Murphy" McCauley
>> > <[email protected]> wrote:
>> > You're not doing anything wrong here. You seem to be doing
>> > something
>> > wrong elsewhere. Specifically, you seem to have constructed
>> > an MSS TCP
>> > option with a tuple as its value, when the value should be
>> > some sort of
>> > integer.
>> >
>> > -- Murphy
>> >
>> >
>> > On Tue, 2011-03-01 at 15:22 -0500, Aaron Rosen wrote:
>> > > Hello I was wondering if someone could explain where I'm
>> > going wrong
>> > > here:
>> > > I'm receiving a packet and then trying to send it back out
>> > with
>> > >
>> > > self.send_openflow_packet(dpid,
>> > > packet.tostring(),openflow.OFPP_FLOOD , inport)
>> > >
>> > > When I do this I'm getting the following exception:
>> > >
>> > > 00290|pyrt|ERR:unable to invoke a Python event handler:
>> > > Traceback (most recent call last):
>> > > File "./nox/lib/util.py", line 113, in f
>> > > event.total_len, buffer_id, packet)
>> > > File "./nox/coreapps/examples/aaronswitch.py", line 177,
>> > in
>> > > packet_in_callback
>> > > self.forward(dpid, inport, packet, packet.arr, bufid)
>> > > File "./nox/coreapps/examples/aaronswitch.py", line 96, in
>> > forward
>> > > self.send_openflow_packet(dpid,
>> > > packet.tostring(),openflow.OFPP_FLOOD , inport)
>> > > File "./nox/lib/packet/packet_base.py", line 114, in
>> > tostring
>> > > return ''.join((buf, self.next.tostring()))
>> > > File "./nox/lib/packet/packet_base.py", line 114, in
>> > tostring
>> > > return ''.join((buf, self.next.tostring()))
>> > > File "./nox/lib/packet/packet_base.py", line 109, in
>> > tostring
>> > > buf = self.hdr()
>> > > File "./nox/lib/packet/tcp.py", line 215, in hdr
>> > > packet += option.to_bytes()
>> > > File "./nox/lib/packet/tcp.py", line 70, in to_bytes
>> > > return struct.pack('!BBH',self.type,4,self.val)
>> > > TypeError: unsupported operand type(s) for &: 'tuple' and
>> > 'long'
>> > >
>> > > Thanks,
>> > >
>> > > Aaron
>> > >
>> > >
>> > > --
>> > > Aaron O. Rosen
>> > > Masters Student - Network Communication
>> > > 306B Fluor Daniel
>> > > 843.425.9777
>> > >
>> >
>> > > _______________________________________________
>> > > nox-dev mailing list
>> > > [email protected]
>> > > http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
>> >
>> >
>> >
>> >
>> >
>> > --
>> > Aaron O. Rosen
>> > Masters Student - Network Communication
>> > 306B Fluor Daniel
>> > 843.425.9777
>> >
>>
>>
>>
>
>
> --
> Aaron O. Rosen
> Masters Student - Network Communication
> 306B Fluor Daniel
> 843.425.9777
>
>
--
Aaron O. Rosen
Masters Student - Network Communication
306B Fluor Daniel
843.425.9777
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