plan9fox/sys
cinap_lenrek 501e69d010 ndb/dns: ignore terminating authoritative flag for no-answer when more nameservers are provided
continue recursing when we get empty but non-negative answer
from a (claimed) authoritative nameserer that provides more
nameservers.

this fixes wordpress dns:

63766.3: sending to 192.0.80.93/ns1.wordpress.com bossypally.files.wordpress.com ip
63766: rcvd OK from 192.0.80.93 (authoritative)
	Q:    bossypally.files.wordpress.com ip
	Auth: files.wordpress.com              5 min           ns   	mdns1.wordpress.com
	      files.wordpress.com              5 min           ns   	mdns2.wordpress.com
	      files.wordpress.com              5 min           ns   	mdns3.wordpress.com
	      files.wordpress.com              5 min           ns   	mdns4.wordpress.com
	      files.wordpress.com              5 min           ns   	mdns5.wordpress.com
	Hint: mdns1.wordpress.com              4 hr            ip   	192.0.75.7
	      mdns2.wordpress.com              4 hr            ip   	198.181.117.7
	      mdns3.wordpress.com              4 hr            ip   	198.181.116.7
	      mdns4.wordpress.com              4 hr            ip   	198.181.118.7
	      mdns5.wordpress.com              4 hr            ip   	192.0.74.7


63766.4: sending to 192.0.75.7/mdns1.wordpress.com bossypally.files.wordpress.com ip
63766: rcvd OK from 192.0.75.7 (authoritative)
	Q:    bossypally.files.wordpress.com ip
	Ans:  bossypally.files.wordpress.com   5 min           ip   	192.0.72.2
	      bossypally.files.wordpress.com   5 min           ip   	192.0.72.3
----------------------------
answer bossypally.files.wordpress.com   5 min           ip   	192.0.72.2
answer bossypally.files.wordpress.com   5 min           ip   	192.0.72.3
----------------------------

note the authoritative flag in the first response from ns1.wordpress.com that
would otherwise terminate the search.
2014-12-08 01:26:07 +01:00
..
doc /sys/doc: permissions for cleanps, mkdirlist, mkfilelist 2012-10-20 19:09:54 +02:00
games/lib fortunes: (no plan9 to hand) 2014-11-14 12:11:42 -05:00
include libsec: add diffie-hellman functions 2014-09-14 02:29:18 +02:00
lib rootstub: create /sys/src/pkg and /sys/lib/pkg directories 2014-11-13 10:23:53 +01:00
man 9boot(8): -from 2014-12-07 14:34:15 +01:00
src ndb/dns: ignore terminating authoritative flag for no-answer when more nameservers are provided 2014-12-08 01:26:07 +01:00