Disabled IPv6 support breaks the DNS module

[thommey]

Trac	Data
Ticket	93
Reported by	@thommey
Status	new
Component	Core
Priority	critical
Milestone	1.8.0
Version	1.8.0 CVS

Disabling IPv6 support causes Eggdrop to not properly resolve server hostnames on startup (no DNS debugging information at all).

Temporary workaround, as usual, is not loading the DNS module :)

Found by: raclure

[thommey]

Comment by @thommey
These changes cause either "connection for numeric IP addresses fail" or "connection for hostnames fail" when ipv6 support is disabled.

http://cvs.eggheads.org/viewvc/eggdrop1.8/src/net.c?r1=1.6&r2=1.7
http://cvs.eggheads.org/viewvc/eggdrop1.8/src/net.c?r1=1.10&r2=1.11

[vanosg]

DNS MODULE LOADED:

disable-ipv6: no
prefer-ipv6: 1
server: ip
RESULT:
[02:28:19] Connected to 2001:778:627f::1:0:49

disable-ipv6: no
prefer-ipv6: 1
server: hostname
RESULT:
[02:41:58] DNS resolved sinisalo.freenode.net to 2a00:1a28:1100:11::42
[02:41:58] Connected to sinisalo.freenode.net

disable-ipv6: no
prefer-ipv6: 0
server: ip
RESULT:
[02:44:49] Connected to 2001:778:627f::1:0:49

disable-ipv6: no
prefer-ipv6: 0
server: hostname
RESULT:
[02:43:14] DNS resolved sinisalo.freenode.net to 91.217.189.42
[02:43:14] Connected to sinisalo.freenode.net

disable-ipv6: yes
prefer-ipv6: 1
server: ip
RESULT:
[02:47:48] Trying server [2001:778:627f::1:0:49]:6667
[02:47:48] net: attempted socket connection refused: 0.0.0.0
[02:47:48] Failed connect to 2001:778:627f::1:0:49 (Operation now in progress)

disable-ipv6: yes
prefer-ipv6: 1
server: hostname
RESULT:
[02:52:54] Trying server [sinisalo.freenode.net]:6667
[02:52:54] net: attempted socket connection refused: 0.0.0.0
[02:52:54] Failed connect to sinisalo.freenode.net (Operation now in progress)

disable-ipv6: yes
prefer-ipv6: 0
server: ip
RESULT:
[02:48:27] Trying server [2001:778:627f::1:0:49]:6667
[02:48:27] net: attempted socket connection refused: 0.0.0.0
[02:48:27] Failed connect to 2001:778:627f::1:0:49 (Operation now in progress)

disable-ipv6: yes
prefer-ipv6: 0
server: hostname
RESULT:
[02:55:57] Trying server [sinisalo.freenode.net]:6667
[02:55:57] net: attempted socket connection refused: 0.0.0.0
[02:55:57] Failed connect to sinisalo.freenode.net (Operation now in progress)

DNS MODULE NOT LOADED

disable-ipv6: yes
prefer-ipv6: 1
server: ip
RESULT:
[03:06:01] Trying server [2001:778:627f::1:0:49]:6667
[03:06:01] Failed connect to 2001:778:627f::1:0:49 (DNS lookup failed)

disable-ipv6: yes
prefer-ipv6: 1
server: hostname
RESULT:
[03:04:54] [@] sinisalo.freenode.net 002 Broney :Your host is sinisalo.freenode.net[91.217.189.42/6667], running version ircd-seven-1.1.3

disable-ipv6: yes
prefer-ipv6: 0
server: ip
RESULT:
[03:06:22] Trying server [2001:778:627f::1:0:49]:6667
[03:06:22] Failed connect to 2001:778:627f::1:0:49 (DNS lookup failed)

disable-ipv6: yes
prefer-ipv6: 0
server: hostname
RESULT:
[03:02:22] Connected to sinisalo.freenode.net
[03:04:17] [@] sinisalo.freenode.net 002 Broney :Your host is sinisalo.freenode.net[91.217.189.42/6667], running version ircd-seven-1.1.3