Hi I think probably pkt.protocols[-1] is fragmented dhcp packet. For older files, fragmented dhcp packet is set with binary data. For new files, fragmented dhcp packet is set with instance of dhcp. By changing to a new file,, instance of dhcp was set in pkt.protocols[-1] and an error occurred.
When packet.Packet() is executed, parser of the packet has already been completed. Do not execute parser against "pkt". Please you get the packet of dhcp by the following method. dhcpPacket = pkt.get_protocols(dhcp.dhcp)[0] Regards, Muraoka On 2017年01月27日 17:10, Munther Numan wrote: > Dear Collages , > > I hope you're fine and well, > > > > I am running DHCP app on ryu and I test it in old version of ryu ( but > actually I don't know which version but I download it before more than 6 > months ) everything goes fine and no problem occurs . > > And when I try it with new version of ryu I get below error : > > > > ARP_PROXY_13: Exception occurred during handler processing. Backtrace > from offending handler [_packet_in_handler] servicing event > [EventOFPPacketIn] follows. > > Traceback (most recent call last): > > File "/usr/local/lib/python2.7/dist-packages/ryu/base/app_manager.py", > line 290, in _event_loop > > handler(ev) > > File "/home/mininet/ryu/ryu/app/SWITCHFSDMV8.py", line 126, in > _packet_in_handler > > dhcpPacket = dhcp.dhcp.parser(pkt.protocols[-1])[0] > > File "/usr/local/lib/python2.7/dist-packages/ryu/lib/packet/dhcp.py", > line 177, in parser > > boot_file) = struct.unpack_from(cls._DHCP_PACK_STR, buf) > > TypeError: unpack_from() argument 1 must be convertible to a buffer, not > dhcp > > > > My temporary solution just replace dhcp.py in new version with dhcp.py > with old version . > > > > In attached file we can find dhcp.py for old version I renamed to > dhco_o.py and dhcp.py for new version and also renamed it to dhcp_n.py > > > > Best Regards > > Munther Numan > Master Student > Faculty of Engineering > University Putra Malaysia > > > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > > > > _______________________________________________ > Ryu-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ryu-devel > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Ryu-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ryu-devel
