6to4: support multiple internal networks, use state vars for radvd config
authorJo-Philipp Wich <jow@openwrt.org>
Thu, 2 Dec 2010 22:41:03 +0000 (22:41 +0000)
committerJo-Philipp Wich <jow@openwrt.org>
Thu, 2 Dec 2010 22:41:03 +0000 (22:41 +0000)
SVN-Revision: 24219

package/6to4/Makefile
package/6to4/files/6to4.sh

index 3becce9..c106570 100644 (file)
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=6to4
-PKG_VERSION:=2
+PKG_VERSION:=3
 PKG_RELEASE:=1
 
 include $(INCLUDE_DIR)/package.mk
index 31dd4b7..cb4a463 100755 (executable)
@@ -18,6 +18,72 @@ find_6to4_prefix() {
        printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
 }
 
+set_6to4_radvd_interface() {
+       local cfgid="$1"
+       local lanif="${2:-lan}"
+       local ifsection=""
+
+       find_ifsection() {
+               local net
+               local cfg="$1"
+               config_get net "$cfg" interface
+
+               [ "$net" = "$lanif" ] && {
+                       ifsection="$cfg"
+                       return 1
+               }
+       }
+
+       config_foreach find_ifsection interface
+
+       [ -z "$ifsection" ] && {
+               ifsection="iface_$sid"
+               uci_set_state radvd "$ifsection" "" interface
+               uci_set_state radvd "$ifsection" interface "$lanif"
+       }
+
+       uci_set_state radvd "$ifsection" ignore            0
+       uci_set_state radvd "$ifsection" IgnoreIfMissing   1
+       uci_set_state radvd "$ifsection" AdvSendAdvert     1
+       uci_set_state radvd "$ifsection" MaxRtrAdvInterval 30
+}
+
+set_6to4_radvd_prefix() {
+       local cfgid="$1"
+       local lanif="${2:-lan}"
+       local wanif="${3:-wan}"
+       local prefix="${4:-0:0:0:1::/64}"
+       local pfxsection=""
+
+       find_pfxsection() {
+               local net base
+               local cfg="$1"
+               config_get net  "$cfg" interface
+               config_get base "$cfg" Base6to4Interface
+
+               [ "$net" = "$lanif" ] && [ "$base" = "$wanif" ] && {
+                       pfxsection="$cfg"
+                       return 1
+               }
+       }
+
+       config_foreach find_pfxsection prefix
+
+       [ -z "$pfxsection" ] && {
+               pfxsection="prefix_${sid}_${lanif}"
+               uci_set_state radvd "$pfxsection" ""                   prefix
+               uci_set_state radvd "$pfxsection" ignore               0
+               uci_set_state radvd "$pfxsection" interface            "$lanif"
+               uci_set_state radvd "$pfxsection" prefix               "$prefix"
+               uci_set_state radvd "$pfxsection" AdvOnLink            1
+               uci_set_state radvd "$pfxsection" AdvAutonomous        1
+               uci_set_state radvd "$pfxsection" AdvValidLifetime     300
+               uci_set_state radvd "$pfxsection" AdvPreferredLifetime 120
+               uci_set_state radvd "$pfxsection" Base6to4Interface    "$wanif"
+       }
+}
+
+
 # Hook into scan_interfaces() to synthesize a .device option
 # This is needed for /sbin/ifup to properly dispatch control
 # to setup_interface_6to4() even if no .ifname is set in
@@ -98,48 +164,43 @@ setup_interface_6to4() {
                        uci_set_state network "$cfg" defaultroute 1
                }
 
-               # find delegation target
-               local adv_interface
-               config_get adv_interface "$cfg" adv_interface
-
-               local adv_ifname
-               config_get adv_ifname "${adv_interface:-lan}" ifname
-
-               local adv_subnet=$(uci_get network "$cfg" adv_subnet)
-
-               grep -qs "^ *$adv_ifname:" /proc/net/dev && {
-                       local subnet6="$prefix6:${adv_subnet:-1}::1/64"
-
-                       logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
-                       ip -6 addr add $subnet6 dev $adv_ifname
-                       uci_set_state network "$cfg" adv_subnet "$subnet6"
-                       uci_set_state network "$cfg" adv_ifname "$adv_ifname"
-
-                       [ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
-                               local sid="6to4_$cfg"
-
-                               uci -q batch <<-EOF
-                                       revert radvd.iface_$sid
-                                       revert radvd.prefix_$sid
-                                       set radvd.iface_$sid=interface
-                                       set radvd.iface_$sid.ignore=0
-                                       set radvd.iface_$sid.interface=${adv_interface:-lan}
-                                       set radvd.iface_$sid.IgnoreIfMissing=1
-                                       set radvd.iface_$sid.AdvSendAdvert=1
-                                       set radvd.iface_$sid.MaxRtrAdvInterval=30
-                                       set radvd.prefix_$sid=prefix
-                                       set radvd.prefix_$sid.ignore=0
-                                       set radvd.prefix_$sid.interface=${adv_interface:-lan}
-                                       set radvd.prefix_$sid.prefix=0:0:0:${adv_subnet:-1}::/64
-                                       set radvd.prefix_$sid.AdvOnLink=1
-                                       set radvd.prefix_$sid.AdvAutonomous=1
-                                       set radvd.prefix_$sid.AdvValidLifetime=300
-                                       set radvd.prefix_$sid.AdvPreferredLifetime=120
-                                       set radvd.prefix_$sid.Base6to4Interface=$wancfg
-                               EOF
-
-                               /etc/init.d/radvd restart
-                       }
+               [ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
+                       local sid="6to4_$cfg"
+
+                       uci_revert_state radvd
+                       config_load radvd
+
+                       # find delegation target
+                       local adv_interface
+                       config_get adv_interface "$cfg" adv_interface
+
+                       local adv_subnet=$(uci_get network "$cfg" adv_subnet)
+                             adv_subnet=$((0x${adv_subnet:-1}))
+
+                       local adv_subnets=""
+
+                       for adv_interface in ${adv_interface:-lan}; do
+                               local adv_ifname
+                               config_get adv_ifname "${adv_interface:-lan}" ifname
+
+                               grep -qs "^ *$adv_ifname:" /proc/net/dev && {
+                                       local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)"
+
+                                       logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
+                                       ip -6 addr add $subnet6 dev $adv_ifname
+
+                                       set_6to4_radvd_interface "$sid" "$adv_interface"
+                                       set_6to4_radvd_prefix    "$sid" "$adv_interface" \
+                                               "$wancfg" "$(printf "0:0:0:%x::/64" $adv_subnet)"
+
+                                       adv_subnets="${adv_subnets:+$adv_subnets }$adv_ifname:$subnet6"
+                                       adv_subnet=$(($adv_subnet + 1))
+                               }
+                       done
+
+                       uci_set_state network "$cfg" adv_subnets "$adv_subnets"
+
+                       /etc/init.d/radvd restart
                }
 
                logger -t "$link" "... started"
@@ -157,24 +218,24 @@ stop_interface_6to4() {
        local local6=$(uci_get_state network "$cfg" ip6addr)
        local defaultroute=$(uci_get_state network "$cfg" defaultroute)
 
-       local adv_subnet=$(uci_get_state network "$cfg" adv_subnet)
-       local adv_ifname=$(uci_get_state network "$cfg" adv_ifname)
+       local adv_subnets=$(uci_get_state network "$cfg" adv_subnets)
 
        grep -qs "^ *$link:" /proc/net/dev && {
                logger -t "$link" "Shutting down ..."
                env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
 
-               [ -n "$adv_subnet" ] && [ -n "$adv_ifname" ] && {
-                       local sid="6to4_$cfg"
-
-                       uci -q batch <<-EOF
-                               revert radvd.iface_$sid
-                               revert radvd.prefix_$sid
-                       EOF
-
+               [ -n "$adv_subnets" ] && {
+                       uci_revert_state radvd
                        /etc/init.d/radvd enabled && /etc/init.d/radvd restart
 
-                       ip -6 addr del $adv_subnet dev $adv_ifname
+                       local adv_subnet
+                       for adv_subnet in $adv_subnets; do
+                               local ifname="${adv_subnet%%:*}"
+                               local subnet="${adv_subnet#*:}"
+
+                               logger -t "$link" " * Removing IPv6 subnet $subnet from interface $ifname"
+                               ip -6 addr del $subnet dev $ifname
+                       done
                }
 
                [ "$defaultroute" = "1" ] && {