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 <aro...@clemson.edu> 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 <jam...@nau.edu>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 >> > <jam...@nau.edu> 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 >> > > nox-dev@noxrepo.org >> > > 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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