dnsmasq: Set prefix on-link bit in RAs

This is fix an issue with dnsmasq's RA that does not set the "on-link" bit, making all local IPv6 traffic go to the router then to the destination host, not directly to each other.

patch is from dnsmasq git

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33216 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/dnsmasq/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dnsmasq
 PKG_VERSION:=2.62
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq

package/dnsmasq/patches/0001-Set-prefix-on-link-bit-in-RAs.patch

@@ -0,0 +1,42 @@
+From fd05f127909bbf4f6983a4de2dcb611947488dee Mon Sep 17 00:00:00 2001
+From: Simon Kelley <simon@thekelleys.org.uk>
+Date: Sun, 12 Aug 2012 17:48:50 +0100
+Subject: [PATCH] Set prefix on-link bit in RAs
+
+---
+ CHANGELOG  |    3 +++
+ src/radv.c |    4 ++--
+ 2 files changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/CHANGELOG b/CHANGELOG
+index 8828694..e1daeef 100644
+--- a/CHANGELOG
++++ b/CHANGELOG
+@@ -45,6 +45,9 @@ version 2.63
+ 	    uk.org.thekelleys.dnsmasq. Thanks to Mathieu
+ 	    Trudel-Lapierre for the patch. 
+ 
++	    Set the "prefix on-link" bit in Router
++	    Advertisements. Thanks to Gui Iribarren for the patch.
++
+ 
+ version 2.62
+             Update German translation. Thanks to Conrad Kostecki.
+diff --git a/src/radv.c b/src/radv.c
+index a3e691a..d1f5268 100644
+--- a/src/radv.c
++++ b/src/radv.c
+@@ -412,8 +412,8 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
+ 		  opt->type = ICMP6_OPT_PREFIX;
+ 		  opt->len = 4;
+ 		  opt->prefix_len = prefix;
+-		  /* autonomous only if we're not doing dhcp */
+-		  opt->flags = do_slaac ? 0x40 : 0x00;
++		  /* autonomous only if we're not doing dhcp, always set "on-link" */
++		  opt->flags = do_slaac ? 0xC0 : 0x80;
+ 		  opt->valid_lifetime = htonl(time);
+ 		  opt->preferred_lifetime = htonl(deprecate ? 0 : time);
+ 		  opt->reserved = 0; 
+-- 
+1.7.10.GIT
+