Hi
I follow this web page(
http://www.tcpipguide.com/free/t_DNSMessageHeaderandQuestionSectionFormat.htm)
to implement the parser.
I'll write a test program as soon as possible.
Yi
2015-04-15 17:53 GMT+08:00 Matthew Hayes <matthew_john_ha...@hotmail.com>:
> Hi Yi,
>
> I've had a go at getting your dns.py code running, but can't get it
> working yet.
>
> I created the dns.py file in ryu/ryu/lib/packet, with your code in it, and
> updated nmeta tc_policy.py to import it:
>
> from ryu.lib.packet import dns
> <snip>
> if pkt_udp:
> if pkt_udp.src_port == 53 or pkt_udp.dst_port == 53:
> pkt_dns = pkt.get_protocol(dns.dns)
> if pkt_dns:
> print "TakeshiTseng dns worked...!"
> else:
> print "TakeshiTseng dns failed, pkt_dns is %s" %
> pkt_dns
> <snip>
>
> The output when a UDP DNS packet-in event occurs is:
> dns_experimental_TakeshiTseng.dns failed, pkt_dns is None
>
> Any idea why it isn't parsing valid DNS packets?
>
> Regards,
>
> Matt.
>
> ------------------------------
> From: a86487...@gmail.com
> Date: Mon, 13 Apr 2015 19:20:59 +0800
> To: matthew_john_ha...@hotmail.com
> CC: ryu-devel@lists.sourceforge.net
>
> Subject: Re: [Ryu-devel] Parsing DNS packets with Ryu?
>
> Hi
>
> I wrote DNS packet parser, but I don't know how to test it.
>
> I would appreciate it if someone can help me to test it.
>
> https://github.com/TakeshiTseng/ryu/blob/dns/ryu/lib/packet/dns.py
>
>
> Yi
>
> 2015-04-13 16:08 GMT+08:00 Matthew Hayes <matthew_john_ha...@hotmail.com>:
>
> Thank you to those who replied to my question re DNS parsing. I've since
> used the dpkt library to do the DNS decode, and it is working fine.
>
> FYI, this was for a Ryu app called nmeta that does policy-based traffic
> classification, see:
>
> http://mattjhayes.github.io/nmeta/
>
> I have some observations on how the LLDP module could be improved, but
> will send as a separate email.
>
> Thanks,
>
> Matt
>
> ------------------------------
> From: linton...@gmail.com
> Date: Mon, 16 Mar 2015 14:09:18 +0800
> To: ryu-devel@lists.sourceforge.net
> Subject: Re: [Ryu-devel] Parsing DNS packets with Ryu?
>
> Hi, Matthew Hayes
>
> There is no DNS parser lib in Ryu but you can use dpkt (
> https://pypi.python.org/pypi/dpkt)
> to parsing DNS packet.
>
>
> Cheers,
>
> Che-Wei Lin <http://about.me/linton.tw>, John Lin
> Institute of Communication Engineering,
> National Tsing Hua University
> [image: ??? on about.me]
> E-mail: linton...@gmail.com
> Blog: linton.tw
> Mobile: +886-952-301-269
>
>
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> -----
> Yi Tseng (a.k.a Takeshi)
> Taiwan National Chiao Tung University
> Department of Computer Science
>
> -----
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--
-----
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
-----
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