Date: Sun, 09 Nov 2008 01:37:58 +0900 From: Hajimu UMEMOTO <ume@freebsd.org> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: net@freebsd.org Subject: Re: Two copies of resolver routines in libc ? Message-ID: <ygezlkap40p.wl%ume@mahoroba.org> In-Reply-To: <yge1vxmqizo.wl%ume@mahoroba.org> References: <20081106192103.GA46651@onelab2.iet.unipi.it> <yge3ai2r4pz.wl%ume@mahoroba.org> <20081108151023.GA72747@onelab2.iet.unipi.it> <yge1vxmqizo.wl%ume@mahoroba.org>
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Hi,
>>>>> On Sun, 09 Nov 2008 01:29:15 +0900
>>>>> Hajimu UMEMOTO <ume@freebsd.org> said:
ume> It may cause the problem where either example.org or example.com
ume> cannot reply correctly.
ume> With the change, the query order will be:
ume> 1) Call res_nqueryN(hosta, T_A and T_AAAA)
ume> Query T_A RR for hosta
ume> Query AAAA RR for hosta
ume> Query T_A RR for hosta.example.org
ume> Query T_AAAA RR for hosta.example.org
ume> Query T_A RR for hosta.example.com
ume> Query T_AAAA RR for hosta.example.com
Oops, it would be:
1) Call res_nqueryN(hosta, T_A and T_AAAA)
Query T_A RR for hosta
Query AAAA RR for hosta
2) Call res_nqueryN(hosta.example.org, T_A and T_AAAA)
Query T_A RR for hosta.example.org
Query T_AAAA RR for hosta.example.org
3) Call res_nqueryN(hosta.example.com, T_A and T_AAAA)
Query T_A RR for hosta.example.com
Query T_AAAA RR for hosta.example.com
Sincerely,
--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume@mahoroba.org ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/
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