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2009 Jun 29
2
openbsd-compat/getrrsetbyname.c: answer buffer size too large for EDNS0 and glibc
...r)" is eventually passed on as
"anslen" to __res_nopt() in resolv/res_mkquery.c:
[...]
NS_PUT16(anslen & 0xffff, cp); /* CLASS = UDP payload size */
and sent out to the recursor:
| IP 127.0.0.1.44138 > 127.0.0.1.53: 31454+ [1au] SSHFP?
orbit.attraktor.org. ar: . OPT UDPsize=0 (48)
| IP 127.0.0.1.53 > 127.0.0.1.44138: 31454 ServFail-| [0q] 0/0/0 (12)
Hauke.
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2023 Dec 04
1
Samba internal DNS client, large replies and TC bit
...ing: TC bit set, probably incomplete reply
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 101, size: 56
;; flags: qr tc rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; QUERY SECTION (1):
;_ldap._tcp.dc._msdcs.rgs.ru. IN SRV
;; ADDITIONAL section (1):
;EDNS0 OPT record (UDPsize: 4096, ERcode: 0, Flags: 0x00): 0 bytes
Note the "warning: TC bit set" and zero records in ANSWER section.
This is a local NAMED cache which forwards requests to windows-based
nameservers of the said domain. When using one of the windows DNS
server though, it works:
$ dnsget -t srv -v...