Re: [OpenWrt-Devel] [PATCH] dnsmasq - bump version and add config option for ra_names
I can confirm this patch works as expected, applied on trunk compiled cleanly and yields dnsmasq 2.62 root@OpenWrt:~# dnsmasq -v Dnsmasq version 2.62 Copyright (c) 2000-2012 Simon Kelley Compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6 no-Lua TFTP no-conntrack Thanks a lot Dominique! On Fri, Jul 6, 2012 at 3:27 AM, Dominique Martinet asmad...@codewreck.org wrote: so no further init script change needed! Agreed, nevertheless it could probably be handy at some point to submit another patch adding an option dns6 or something like that, to simplify config management. I might try to take a stab at it, but no promises. For the moment, using option6 sounds perfect. Regards, -- Asmadeus | Dominique Martinet late for work :D ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [PATCH] dnsmasq - bump version and add config option for ra_names
Gui Iribarren wrote on Thu, Jul 05, 2012 : I'm currently using the config rdnss feature of radvd so that SLAAC hosts also get a DNS server entry, again independent of dhcpv4. I assume that's also possible with this new scheme, right? i could search about it on dnsmasq documentation , but you seem to have immersed in the subject much more than i could achieve right now. I'll have to say I haven't used this yet, so none of my clients had a rnssd running :) Nevertheless, the documentation is good enough (I'm using http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html ) It states: --enable-ra [...] If provided, the DHCPv6 options dns-server and domain-search are used for RDNSS and DNSSL. As well as: IPv6 options are specified using the option6: keyword, followed by the option number or option name. The IPv6 option name space is disjoint from the IPv4 option name space. IPv6 addresses in options must be bracketed with square brackets, eg. --dhcp-option=option6:ntp-server,[1234::56] As far as experiments go, without any option dnsmasq advertises the router local address, but my resolvconf doesnt add it to /etc/resolv.conf Also, adding a line like this works as expected: --dhcp-option=option6:dns-server,[2001:dead:beef::1] I couldn't get it to accept a domain-search, but I'm not quite sure if rnssd supports it anyway :) Given the openwrt conf sytax already supports dhcp-options, adding a few lines in the conf should work: config 'dhcp' option 'interface' 'lan' list 'dhcp_option' 'option6:dns-server,[2001:dead:beef::1]' which ends up like: dhcp-option=lan,option6:dns-server,[2001:dead:beef::1] so no further init script change needed! Regards, -- Asmadeus | Dominique Martinet late for work :D ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
[OpenWrt-Devel] [PATCH] dnsmasq - bump version and add config option for ra_names
Hi,
(I just subscribed to the list, so sorry if my mail format isn't right
somehow. I quickly glanced at the archive and don't think what I offer
has been looked at, aside of a quick reference to the changelog when
the feature wasn't available in a stable release of dnsmasq yet)
ra_names is a feature introduced in dnsmasq 2.61, which is why I changed
the rules to build something newer (and figured I might as well take it
to 62)
Basically, it:
- does router-advertisment (not dhcpv6)
- when it gets a request for RA, it looks up if there is an active ipv4
lease for the same host via its MAC address, and if there is it adds
the to-be ipv6 to the local dns (assuming the host will take the dns)
- when it gets a dhcpv4 release it takes off the ipv6 dns record as
well
(since RA is stateless and doesn't give the host name, I couldn't figure
any better way without dhcpv6; I was about to hack something (with a
very large axe and radvd) when I found out they've done it already :D)
There are also modes for router-advertisment only which I haven't looked
at, and a dhcpv6 client implementation that I didn't try yet either.
The option I added is in the dhcp field, a ra_name option with the
prefix to announce in RAs, i.e.
config dhcp 'lan'
option interface 'lan'
option ra_names '2001:dead:beef::'
(Note: it doesn't seem to add the local dns with a fe80:: prefix)
Attached is the patch in svn format, feel free to ask if you prefer git's (I
personally do but didn't look hard enough for the git repository!)
Please give any comment and include something similar if you like it.
Rergards,
--
Dominique Martinet | Asmadeus
Index: package/dnsmasq/files/dnsmasq.init
===
--- package/dnsmasq/files/dnsmasq.init (revision 32579)
+++ package/dnsmasq/files/dnsmasq.init (working copy)
@@ -360,6 +360,12 @@
xappend --dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}
dhcp_option_add $cfg $networkid
+
+ config_get ra_names $cfg ra_names
+
+ [ -n $ra_names ] {
+ xappend --dhcp-range=$networkid,$ra_names,ra-names,$leasetime
+ }
}
dhcp_option_add() {
Index: package/dnsmasq/patches/101-ipv6.patch
===
--- package/dnsmasq/patches/101-ipv6.patch (revision 32579)
+++ package/dnsmasq/patches/101-ipv6.patch (working copy)
@@ -1,13 +0,0 @@
a/src/config.h
-+++ b/src/config.h
-@@ -263,8 +263,9 @@ NOTES:
- /* We assume that systems which don't have IPv6
-headers don't have ntop and pton either */
-
--#if defined(INET6_ADDRSTRLEN) defined(IPV6_V6ONLY) !defined(NO_IPV6)
-+#if defined(INET6_ADDRSTRLEN) !defined(NO_IPV6)
- # define HAVE_IPV6
-+# define IPV6_V6ONLY 26
- # define ADDRSTRLEN INET6_ADDRSTRLEN
- # if defined(SOL_IPV6)
- #define IPV6_LEVEL SOL_IPV6
Index: package/dnsmasq/Makefile
===
--- package/dnsmasq/Makefile (revision 32579)
+++ package/dnsmasq/Makefile (working copy)
@@ -8,12 +8,12 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=dnsmasq
-PKG_VERSION:=2.59
-PKG_RELEASE:=4
+PKG_VERSION:=2.62
+PKG_RELEASE:=1
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq
-PKG_MD5SUM:=b5757ef2d7b651748eeebb88af29d7d6
+PKG_MD5SUM:=f47e5cb8f5bac6343f24b2dbe317ab40
PKG_INSTALL:=1
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Re: [OpenWrt-Devel] [PATCH] dnsmasq - bump version and add config option for ra_names
On Thu, Jul 5, 2012 at 3:38 PM, Dominique Martinet asmad...@codewreck.org wrote: Hi, (I just subscribed to the list, so sorry if my mail format isn't right somehow. I quickly glanced at the archive and don't think what I offer has been looked at, aside of a quick reference to the changelog when the feature wasn't available in a stable release of dnsmasq yet) ra_names is a feature introduced in dnsmasq 2.61, which is why I changed the rules to build something newer (and figured I might as well take it to 62) Basically, it: - does router-advertisment (not dhcpv6) - when it gets a request for RA, it looks up if there is an active ipv4 lease for the same host via its MAC address, and if there is it adds the to-be ipv6 to the local dns (assuming the host will take the dns) - when it gets a dhcpv4 release it takes off the ipv6 dns record as well (since RA is stateless and doesn't give the host name, I couldn't figure any better way without dhcpv6; I was about to hack something (with a very large axe and radvd) when I found out they've done it already :D) This is gorgeous Dominique, My planned hack involved ladvd and flooding the network with LLDP packets, then parse the info inside those packets and spew it in /tmp/dhcp.leases I was just waiting for ladvd dev to patch the source so that it can compile cleanly on OpenWrt. While that scheme doesn't depend on ipv4, ra_names is definitely more elegant and as long as double-stack is the standard, i'll buy it! There are also modes for router-advertisment only which I haven't looked at, and a dhcpv6 client implementation that I didn't try yet either. The option I added is in the dhcp field, a ra_name option with the prefix to announce in RAs, i.e. config dhcp 'lan' option interface 'lan' option ra_names '2001:dead:beef::' I understand this serves the double purpose of activating this feature, and at the same time making dnsmasq send RA, so no radvd is needed or does it depend on RA sent by radvd ? in the second case, wouldn't it make sense to get the prefix config directly from /etc/config/radvd instead of duplicating information? (Note: it doesn't seem to add the local dns with a fe80:: prefix) It shouldn't, AFAIU link-local addresses are not meant to be resolved, since they always need the interface scope suffix Attached is the patch in svn format, feel free to ask if you prefer git's (I personally do but didn't look hard enough for the git repository!) Please give any comment and include something similar if you like it. Rergards, -- Dominique Martinet | Asmadeus ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [PATCH] dnsmasq - bump version and add config option for ra_names
Hi, Gui Iribarren wrote on Thu, Jul 05, 2012 : On Thu, Jul 5, 2012 at 3:38 PM, Dominique Martinet asmad...@codewreck.org wrote: config dhcp 'lan' option interface 'lan' option ra_names '2001:dead:beef::' I understand this serves the double purpose of activating this feature, and at the same time making dnsmasq send RA, so no radvd is needed or does it depend on RA sent by radvd ? in the second case, wouldn't it make sense to get the prefix config directly from /etc/config/radvd instead of duplicating information? It effectively makes radvd unneeded (but harmless, I just tried with both running with my previous radvd configuration), so it seems better to give the prefix here. I'm pretty sure it would be possible to have the same feature with announces only from radvd and dnsmasq passively listening, but I didn't find a way to do so and for what I've been using radvd it doesn't seem to change much. Also I forgot to say it in the mail body, but I removed some ipv6 patch for dnsmasq as it no longer applied, I am not quite sure what or if it implies anything. -- Asmadeus | Dominique Martinet ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [PATCH] dnsmasq - bump version and add config option for ra_names
On Thu, Jul 5, 2012 at 5:18 PM, Dominique Martinet asmad...@codewreck.org wrote: Hi, Gui Iribarren wrote on Thu, Jul 05, 2012 : On Thu, Jul 5, 2012 at 3:38 PM, Dominique Martinet asmad...@codewreck.org wrote: config dhcp 'lan' option interface 'lan' option ra_names '2001:dead:beef::' I understand this serves the double purpose of activating this feature, and at the same time making dnsmasq send RA, so no radvd is needed or does it depend on RA sent by radvd ? in the second case, wouldn't it make sense to get the prefix config directly from /etc/config/radvd instead of duplicating information? It effectively makes radvd unneeded (but harmless, I just tried with both running with my previous radvd configuration), so it seems better to give the prefix here. Agree, great to know. I'm pretty sure it would be possible to have the same feature with announces only from radvd and dnsmasq passively listening, but I didn't find a way to do so and for what I've been using radvd it doesn't seem to change much. I'm currently using the config rdnss feature of radvd so that SLAAC hosts also get a DNS server entry, again independent of dhcpv4. I assume that's also possible with this new scheme, right? i could search about it on dnsmasq documentation , but you seem to have immersed in the subject much more than i could achieve right now. ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
