View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0003874 | unreal | ircd | public | 2009-11-06 23:08 | 2015-07-29 17:52 |
| Reporter | ccowart | Assigned To | syzop | ||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Unix | OS | FreeBSD | OS Version | 7.1 |
| Product Version | 3.2.8 | ||||
| Fixed in Version | 3.2.10.2 | ||||
| Summary | 0003874: ipv6 nameserver support | ||||
| Description | I typically have a single resolver as an IPv6 address listed in /etc/resolv.conf. After noticing that unrealircd was failing to resolve the reverse DNS for client connections, I preceded my IPv6 address with the IPv4 address configured to the same interface on the DNS server. Everything began working. If unreal actually supports IPv6, it shouldn't need IPv4 for DNS lookups. From /quote version: 13:56 -!- Unreal3.2.8.1. irc.timesinks.net Fhi6XeOoE [FreeBSD jayne.timesinks.net 7.1-RELEASE-p8 FreeBSD 7.1-RELEASE-p8 #0: Fri Oct 2 07:10:41 UTC 2009 [email protected]:/usr/obj/usr/src/sys/GENERIC i386=2309] 13:56 !irc.timesinks.net OpenSSL 0.9.8e 23 Feb 2007 13:56 -!- UHNAMES NAMESX SAFELIST HCN MAXCHANNELS=20 CHANLIMIT=#:20 MAXLIST=b:60,e:60,I:60 NICKLEN=30 CHANNELLEN=32 TOPICLEN=307 KICKLEN=307 AWAYLEN=307 MAXTARGETS=20 are supported by this server 13:56 -!- WALLCHOPS WATCH=128 WATCHOPTS=A SILENCE=15 MODES=12 CHANTYPES=# PREFIX=(ohv)@%+ CHANMODES=beIqa,kfL,lj,psmntirRcOAQKVCuzNSMTG NETWORK=Timesinks CASEMAPPING=ascii EXTBAN=~,cqnr ELIST=MNUCT STATUSMSG=@%+ are supported by this server 13:56 -!- EXCEPTS INVEX CMDS=KNOCK,MAP,DCCALLOW,USERIP are supported by this server | ||||
| Tags | No tags attached. | ||||
| 3rd party modules | |||||
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We use the c-ares library ( http://c-ares.haxx.se/ ). Once they support IPv6, we will too, once we upgrade to that version (& implement any changes if required). I'm not entirely up to date with regards to c-ares development, so I don't know if they support it now (it has always been on their todo/roadmap, though). |
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I hope this has fixed itself by now? I’m pretty sure that ares does the right thing when reading entries from /etc/resolv.conf nowadays... A separate issue is that the mechanism our set::dns::nameserver uses (only use when /etc/resolv.conf has no nameserver lines) to communicate with the c-ares library does not allow the user to specify an IPv6 server (see http://c-ares.haxx.se/ares_init.html ARES_OPT_SERVERS and http://hg.unrealircd.org/hg/unreal/file/f07e2f42a977/src/res.c#l169 ). |
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As of c-ares 1.7.1, c-ares includes a ares_set_servers() function that is inteded to replace the ARES_OPT_SERVERS option to allow IPv4 AND IPv6 name servers to be specified: http://man.cx/ares_set_servers(3) |
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This was probably fixed a few years ago. We don't set any nameservers in UnrealIRCd and leave this 100% up to c-ares. Since c-ares added the IPv6 functionality years ago we should be good :) |
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Just to confirm, yes this works OK in 3.4-beta3. Tried with a single ::1 nameserver. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2009-11-06 23:08 | ccowart | New Issue | |
| 2009-11-07 13:29 | syzop | Note Added: 0015951 | |
| 2009-11-07 13:30 | syzop | QA | => Not touched yet by developer |
| 2009-11-07 13:30 | syzop | U4: Need for upstream patch | => No need for upstream InspIRCd patch |
| 2009-11-07 13:30 | syzop | U4: Upstream notification of bug | => Not decided |
| 2009-11-07 13:30 | syzop | U4: Contributor working on this | => None |
| 2009-11-07 13:30 | syzop | Severity | minor => feature |
| 2009-11-07 13:30 | syzop | Status | new => acknowledged |
| 2009-11-07 13:30 | syzop | Summary | dns lookup failures using ipv6 transport => ipv6 nameserver support |
| 2009-11-07 13:30 | syzop | Note Edited: 0015951 | |
| 2013-01-27 06:37 | ohnobinki | Note Added: 0017389 | |
| 2013-01-27 06:37 | ohnobinki | Status | acknowledged => feedback |
| 2013-01-28 09:08 | Jobe | Note Added: 0017391 | |
| 2013-02-12 07:00 | dummy | Status | feedback => has patch |
| 2013-02-19 22:55 | syzop | Status | has patch => confirmed |
| 2015-07-09 19:14 | syzop | Note Added: 0018441 | |
| 2015-07-09 19:14 | syzop | Status | confirmed => resolved |
| 2015-07-09 19:14 | syzop | Fixed in Version | => 3.2.10.2 |
| 2015-07-09 19:14 | syzop | Resolution | open => fixed |
| 2015-07-09 19:14 | syzop | Assigned To | => syzop |
| 2015-07-29 17:52 | syzop | Note Added: 0018572 |
