Date: Tue, 7 Dec 2004 16:47:59 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: David Malone <dwmalone@maths.tcd.ie> Cc: freebsd-hackers@freebsd.org Subject: Re: hostname lookup problem Message-ID: <20041207164759.A283@curly.tele2.no> In-Reply-To: <20041207093709.GA41269@walton.maths.tcd.ie>; from dwmalone@maths.tcd.ie on Tue, Dec 07, 2004 at 09:37:09AM %2B0000 References: <20041206195709.A332@curly.tele2.no> <20041207093709.GA41269@walton.maths.tcd.ie>
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On Tue, Dec 07, 2004 at 09:37:09AM +0000, David Malone wrote:
> On Mon, Dec 06, 2004 at 07:57:09PM +0100, Hans Petter Selasky wrote:
> > I have come across a problem where res_send() goes into a minute-long wait
> > loop, waiting for the hostname to be looked up, after a getaddrinfo() call. I
> > have captured the packets sent/received, and according to the code the
> > query response does not match. Is this a bug in libc or is it a DNS server
> > problem?
>
> It looks like the recursive name server is doing something weird.
The nameservers I use are 193.216.1.10 (primary DNS) (nic.daxnet.no) and
193.216.69.10 (secondary DNS) (ns.tele2.no)
Output from "dig aaaa www.google.com @193.216.1.10":
; <<>> DiG 8.3 <<>> aaaa www.google.com @193.216.1.10
; (1 server found)
;; res options: init recurs defnam dnsrch
;; wrong query name:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; www.google.akadns.net, type = AAAA, class = IN
;; wrong query name:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; www.google.akadns.net, type = AAAA, class = IN
;; res_nsend to server 193.216.1.10 193.216.1.10: Operation timed out
Output from "dig a www.google.com @193.216.1.10":
; <<>> DiG 8.3 <<>> a www.google.com @193.216.1.10
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 13, ADDITIONAL: 12
;; QUERY SECTION:
;; www.google.com, type = A, class = IN
;; ANSWER SECTION:
www.google.com. 3m22s IN CNAME www.google.akadns.net.
www.google.akadns.net. 2m25s IN A 66.102.9.104
www.google.akadns.net. 2m25s IN A 66.102.9.99
;; AUTHORITY SECTION:
. 3d19h35m36s IN NS A.ROOT-SERVERS.net.
. 3d19h35m36s IN NS H.ROOT-SERVERS.net.
. 3d19h35m36s IN NS C.ROOT-SERVERS.net.
. 3d19h35m36s IN NS G.ROOT-SERVERS.net.
. 3d19h35m36s IN NS F.ROOT-SERVERS.net.
. 3d19h35m36s IN NS B.ROOT-SERVERS.net.
. 3d19h35m36s IN NS J.ROOT-SERVERS.net.
. 3d19h35m36s IN NS K.ROOT-SERVERS.net.
. 3d19h35m36s IN NS L.ROOT-SERVERS.net.
. 3d19h35m36s IN NS M.ROOT-SERVERS.net.
. 3d19h35m36s IN NS I.ROOT-SERVERS.net.
. 3d19h35m36s IN NS E.ROOT-SERVERS.net.
. 3d19h35m36s IN NS D.ROOT-SERVERS.net.
;; ADDITIONAL SECTION:
A.ROOT-SERVERS.net. 19h40m39s IN A 198.41.0.4
H.ROOT-SERVERS.net. 19h40m39s IN A 128.63.2.53
C.ROOT-SERVERS.net. 19h40m39s IN A 192.33.4.12
G.ROOT-SERVERS.net. 19h40m39s IN A 192.112.36.4
F.ROOT-SERVERS.net. 19h40m39s IN A 192.5.5.241
B.ROOT-SERVERS.net. 19h40m39s IN A 192.228.79.201
J.ROOT-SERVERS.net. 19h38m52s IN A 192.58.128.30
K.ROOT-SERVERS.net. 19h38m52s IN A 193.0.14.129
L.ROOT-SERVERS.net. 19h38m52s IN A 198.32.64.12
M.ROOT-SERVERS.net. 19h38m52s IN A 202.12.27.33
I.ROOT-SERVERS.net. 19h38m52s IN A 192.36.148.17
E.ROOT-SERVERS.net. 19h40m39s IN A 192.203.230.10
;; Total query time: 210 msec
;; FROM: curly.tele2.no to SERVER: 193.216.1.10 193.216.1.10
;; WHEN: Tue Dec 7 16:27:56 2004
;; MSG SIZE sent: 32 rcvd: 499
>
> Do you know what is acting as your recursive DNS server?
No.
Yours
-HPS
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