Never mind. I found out what I was doing wrong.
I was doing
ipv4_dst=(str(ipv4_network), str(ipv4_network.netmask))
when I should be doing
ipv4_dst=(str(ipv4_network.network_address), str(ipv4_network.netmask))
if ipv4_network = IPv4("10.0.0.0/8") then str(ipv4_network) will be
equal to "10.0.0.0/8", which is not accepted by OFPMatch.
I hope it can help others in the future.
Carlos Miguel Ferreira
On 4 April 2018 at 13:54, Carlos Ferreira <[email protected]> wrote:
> Hello to all.
>
> Using the OFPMatch class, I'm having some difficulty in applying a
> mask to the ipv4_dst field.
>
> The following code shows how I'm doing it.
>
> client_ipv4 is an ipaddress.IPv4Address instance.
> ipv4_network is an ipaddress.IPv4Network instance.
>
> match=ofp_parser.OFPMatch(
> in_port=pkt_in_port, eth_src=pkt.src, eth_type=ether.ETH_TYPE_IP,
> ipv4_src=str(client_ipv4), ipv4_dst=(str(ipv4_network),
> str(ipv4_network.netmask)),
> ip_proto=inet.IPPROTO_TCP
> ),
>
>
> Using this code, raises the following exception.
>
> Traceback (most recent call last):
> File
> "/home/carlosmf/PythonVirtEnv/SDN_Controller/lib/python3.6/site-packages/archsdn/ArchSDN.py",
> line 219, in packet_in_event
> engine.process_packet_in_event(ev)
> File
> "/home/carlosmf/PythonVirtEnv/SDN_Controller/lib/python3.6/site-packages/archsdn/engine/kernel.py",
> line 1192, in process_packet_in_event
> ip_proto=inet.IPPROTO_UDP
> File
> "/home/carlosmf/PythonVirtEnv/SDN_Controller/lib/python3.6/site-packages/ryu/ofproto/ofproto_v1_3_parser.py",
> line 891, in __init__
> (k, v) in kwargs.items())
> File
> "/home/carlosmf/PythonVirtEnv/SDN_Controller/lib/python3.6/site-packages/ryu/ofproto/ofproto_v1_3_parser.py",
> line 891, in <genexpr>
> (k, v) in kwargs.items())
> File
> "/home/carlosmf/PythonVirtEnv/SDN_Controller/lib/python3.6/site-packages/ryu/ofproto/oxx_fields.py",
> line 133, in _normalize_user
> v = b''.join(six.int2byte(_ord(x) & _ord(y)) for (x, y) in zip(v, m))
> File
> "/home/carlosmf/PythonVirtEnv/SDN_Controller/lib/python3.6/site-packages/ryu/ofproto/oxx_fields.py",
> line 133, in <genexpr>
> v = b''.join(six.int2byte(_ord(x) & _ord(y)) for (x, y) in zip(v, m))
> ValueError: invalid literal for int() with base 10: b'\n\x00\x00\x00'
>
>
> Can anyone tell me if I'm improperly using the ipv4_dst field ?
> Thank you.
>
>
>
> --
>
> Carlos Miguel Ferreira
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