Yacoubi Mohamed

Mon bloc IPv6 étant enfin routé correctement, je me suis attelé à la configuration de ce dernier sur le Dom0 et DomU Xen.

Ma configuration Xen étant à l'origine en bridge et disposant d'un bloc routé vers mon serveur, j'ai donc dût basculer ma configuration Xen en mode route. (vif-route)

Bien entendu à l'instar du mode bridge, le mode route n'est pas compatible IPv6 ...
Voici deux patch à appliquer (compatible Xen-4) ainsi qu'un exemple de configuration (Gentoo).

1) Dom0

• vif-common

--- vif-common.sh~      2010-04-07 18:12:04.000000000 +0200
+++ vif-common.sh       2010-06-26 23:08:38.000000000 +0200
@@ -14,7 +14,7 @@
 # License along with this library; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #
-
+# IPv6 Patched by Timeuhmeuh
 
 dir=$(dirname "$0")
 . "$dir/xen-hotplug-common.sh"
@@ -135,6 +135,17 @@
   ip addr show "$1" | awk "/^.*inet.*$1\$/{print \$2}" | sed -n '1 s,/.*,,p'
 }
 
+##
+# ip6_of interface
+#
+# Print the IPv6 address currently in use at the given interface, or nothing if
+# the interface is not up.
+#
+ip6_of()
+{
+        ip -6 addr show dev "$1" scope global | awk -F'[ |/]' '/inet6 (([0-9a-f]+:*)+)/ { print $6 } ' | awk '/::/ {print $1}'
+}
+
 
 ##
 # dom0_ip
@@ -156,3 +167,38 @@
   fi
   echo "$result"
 }
+
+##
+# dom0_ip6
+#
+# Print the IPv6 address of the interface in dom0 through which we are routing.
+# This is the IPv6 address on the interface specified as "netdev" as a parameter
+# to these scripts, or eth0 by default.  This function will call fatal if no
+# such interface could be found.
#
+dom0_ip6()
+{
+    local nd=${netdev:-eth0}
+    local result=$(ip6_of "$nd")
+    if [ -z "$result" ]; then
+        echo ""
+    else
+        echo "$result"
+    fi
+}
+
+##
+# is_ip6
+#
+# Verifing IPv6 address
+#
+is_ipv6()
+{
+case "$1" in
+    *:*:*)
+        echo "yes"
+        ;;
+    *)
+        echo ""
+esac
+}

• vif-route

--- vif-route~	2010-04-07 18:12:04.000000000 +0200
+++ vif-route	2010-06-26 23:12:45.000000000 +0200
@@ -18,17 +18,24 @@
 # Read from the store:
 # ip      list of IP networks for the vif, space-separated (default given in
 #         this script).
+#
+# IPv6 Patched by Timeuhmeuh - http://blog.yacoubi.fr
 #============================================================================
 
 dir=$(dirname "$0")
 . "$dir/vif-common.sh"
 
 main_ip=$(dom0_ip)
+main_ip6=$(dom0_ip6)
 
 case "$command" in
     online)
+	log info "[vif-route] online request, ip ${ip} with main_ip ${main_ip} and main_ip6 ${main_ip6} for $vif."
         ifconfig ${vif} ${main_ip} netmask 255.255.255.255 up
-        echo 1 >/proc/sys/net/ipv4/conf/${vif}/proxy_arp
+	if [ ! -z "${main_ip6}" ]; then
+		ip -6 addr add ${main_ip6} dev ${vif}
+	fi
+	echo 1 >/proc/sys/net/ipv4/conf/${vif}/proxy_arp
         ipcmd='add'
         cmdprefix=''
         ;;
@@ -43,7 +50,16 @@
     # If we've been given a list of IP addresses, then add routes from dom0 to
     # the guest using those addresses.
     for addr in ${ip} ; do
-      ${cmdprefix} ip route ${ipcmd} ${addr} dev ${vif} src ${main_ip}
+	result=$(is_ipv6 "${addr}")
+	if [ -z "${result}" ] ; then
+		result=`${cmdprefix} ip route ${ipcmd} ${addr} dev ${vif} src ${main_ip} 2>&1`
+		log info "[vif-route] Result: ${result}"
+	else
+		log info "[vif-route] Adding IPv6 address ${addr} with src ${main_ip6} for $vif."
+	      result=`${cmdprefix} ip -6 route ${ipcmd} ${addr} dev ${vif} src ${main_ip6} 2>&1`
+		log info "[vif-route] Result: ${result}"
+	fi
+#      ${cmdprefix} ip route ${ipcmd} ${addr} dev ${vif} src ${main_ip}
     done 
 fi

• /etc/conf.d/net

config_eth0=( "192.168.0.1/24" "2001:758:f00:340:192:168:0:12/64" "2001:758:5312::/48" )

• /etc/xen/domU

vif = [ 'ip=2001:758:5312::2 192.168.0.10' ]

2) Dom0

• /etc/conf.d/net

config_eth0=( "192.168.0.2/24" "2001:758:5312::2/48" )
routes_eth0=( "default gw 192.168.0.1" "default via 2001:758:5312::" )

Patch :

• xen-vif-route-ipv6.diff
• xen-vif-common-ipv6.diff

Lien utile : xen-and-routed-ipv6