+#!/bin/sh
# 6to4.sh - IPv6-in-IPv4 tunnel backend
-# Copyright (c) 2010 OpenWrt.org
+# Copyright (c) 2010-2012 OpenWrt.org
+
+[ -n "$INCLUDE_ONLY" ] || {
+ . /etc/functions.sh
+ . ../netifd-proto.sh
+ init_proto "$@"
+}
find_6to4_wanif() {
local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
}
+test_6to4_rfc1918()
+{
+ local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
+ [ $1 -eq 10 ] && return 0
+ [ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
+ [ $1 -eq 172 ] && [ $2 -ge 16 ] && [ $2 -le 31 ] && return 0
+ return 1
+}
+
set_6to4_radvd_interface() {
local cfgid="$1"
local lanif="${2:-lan}"
+ local ifmtu="${3:-1280}"
local ifsection=""
find_ifsection() {
uci_set_state radvd "$ifsection" IgnoreIfMissing 1
uci_set_state radvd "$ifsection" AdvSendAdvert 1
uci_set_state radvd "$ifsection" MaxRtrAdvInterval 30
+ uci_set_state radvd "$ifsection" AdvLinkMTU "$ifmtu"
}
set_6to4_radvd_prefix() {
local lanif="${2:-lan}"
local wanif="${3:-wan}"
local prefix="${4:-0:0:0:1::/64}"
+ local vlt="${5:-300}"
+ local plt="${6:-120}"
local pfxsection=""
find_pfxsection() {
uci_set_state radvd "$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" AdvValidLifetime "$vlt"
+ uci_set_state radvd "$pfxsection" AdvPreferredLifetime "$plt"
uci_set_state radvd "$pfxsection" Base6to4Interface "$wanif"
}
}
+tun_error() {
+ local cfg="$1"; shift;
-# 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
-# the configuration.
-scan_6to4() {
- config_set "$1" device "6to4-$1"
+ [ -n "$1" ] && proto_notify_error "$cfg" "$@"
+ proto_block_restart "$cfg"
}
-coldplug_interface_6to4() {
- setup_interface_6to4 "6to4-$1" "$1"
-}
-
-setup_interface_6to4() {
- local iface="$1"
- local cfg="$2"
+proto_6to4_setup() {
+ local cfg="$1"
+ local iface="$2"
local link="6to4-$cfg"
- local local4=$(uci_get network "$cfg" ipaddr)
-
- local mtu
- config_get mtu "$cfg" mtu
+ json_get_var mtu mtu
+ json_get_var ttl ttl
+ json_get_var local4 ipaddr
- local ttl
- config_get ttl "$cfg" ttl
-
- local metric
- config_get metric "$cfg" metric
-
- local defaultroute
- config_get_bool defaultroute "$cfg" defaultroute 1
+ json_get_var adv_subnet adv_subnet
+ json_get_var adv_interface adv_interface
+ json_get_var adv_valid_lifetime adv_valid_lifetime
+ json_get_var adv_preferred_lifetime adv_preferred_lifetime
local wanif=$(find_6to4_wanif)
[ -z "$wanif" ] && {
- logger -t "$link" "Cannot find wan interface - aborting"
+ tun_error "$cfg" "NO_WAN_LINK"
return
}
- local wancfg=$(find_config "$wanif")
+ . /lib/network/config.sh
+ local wancfg="$(find_config "$wanif")"
[ -z "$wancfg" ] && {
- logger -t "$link" "Cannot find wan network - aborting"
+ tun_error "$cfg" "NO_WAN_LINK"
return
}
# If local4 is unset, guess local IPv4 address from the
# interface used by the default route.
[ -z "$local4" ] && {
- [ -n "$wanif" ] && {
- local4=$(find_6to4_wanip "$wanif")
- uci_set_state network "$cfg" wan_device "$wanif"
- }
+ [ -n "$wanif" ] && local4=$(find_6to4_wanip "$wanif")
}
- [ -n "$local4" ] && {
- logger -t "$link" "Starting ..."
-
- # creating the tunnel below will trigger a net subsystem event
- # prevent it from touching or iface by disabling .auto here
- uci_set_state network "$cfg" ifname $link
- uci_set_state network "$cfg" auto 0
-
- # find our local prefix
- local prefix6=$(find_6to4_prefix "$local4")
- local local6="$prefix6::1/16"
-
- logger -t "$link" " * IPv4 address is $local4"
- logger -t "$link" " * IPv6 address is $local6"
- ip tunnel add $link mode sit remote any local $local4 ttl ${ttl:-64}
- ip link set $link up
- ip link set mtu ${mtu:-1280} dev $link
- ip addr add $local6 dev $link
+ [ -z "$local4" ] && {
+ tun_error "$cfg" "NO_WAN_LINK"
+ return
+ }
- uci_set_state network "$cfg" ipaddr $local4
- uci_set_state network "$cfg" ip6addr $local6
+ test_6to4_rfc1918 "$local4" && {
+ tun_error "$cfg" "INVALID_LOCAL_ADDRESS"
+ return
+ }
- [ "$defaultroute" = 1 ] && {
- logger -t "$link" " * Adding default route"
- ip -6 route add 2000::/3 via ::192.88.99.1 metric ${metric:-1} dev $link
- uci_set_state network "$cfg" defaultroute 1
- }
+ # find our local prefix
+ local prefix6=$(find_6to4_prefix "$local4")
+ local local6="$prefix6::1"
- [ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
- local sid="6to4_$cfg"
+ proto_init_update "$link" 1
+ proto_add_ipv6_address "$local6" 16
+ proto_add_ipv6_route "::" 0 "::192.88.99.1"
- uci_revert_state radvd
- config_load radvd
+ proto_add_tunnel
+ json_add_string mode sit
+ json_add_int mtu "${mtu:-1280}"
+ json_add_int ttl "${ttl:-64}"
+ json_add_string local "$local4"
+ proto_close_tunnel
- # find delegation target
- local adv_interface
- config_get adv_interface "$cfg" adv_interface
+ proto_send_update "$cfg"
- local adv_subnet=$(uci_get network "$cfg" adv_subnet)
- adv_subnet=$((0x${adv_subnet:-1}))
+ [ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
+ local sid="6to4_$cfg"
- local adv_subnets=""
+ uci_revert_state radvd
+ config_load radvd
- for adv_interface in ${adv_interface:-lan}; do
- local adv_ifname
- config_get adv_ifname "${adv_interface:-lan}" ifname
+ adv_subnet=$((0x${adv_subnet:-1}))
- grep -qs "^ *$adv_ifname:" /proc/net/dev && {
- local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)"
+ local adv_subnets=""
- logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
- ip -6 addr add $subnet6 dev $adv_ifname
+ for adv_interface in ${adv_interface:-lan}; do
+ local adv_ifname
+ config_get adv_ifname "${adv_interface:-lan}" ifname
- set_6to4_radvd_interface "$sid" "$adv_interface"
- set_6to4_radvd_prefix "$sid" "$adv_interface" \
- "$wancfg" "$(printf "0:0:0:%x::/64" $adv_subnet)"
+ grep -qs "^ *$adv_ifname:" /proc/net/dev && {
+ local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)"
- adv_subnets="${adv_subnets:+$adv_subnets }$adv_ifname:$subnet6"
- adv_subnet=$(($adv_subnet + 1))
- }
- done
+ logger -t "$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_subnets "$adv_subnets"
+ set_6to4_radvd_interface "$sid" "$adv_interface" "$mtu"
+ set_6to4_radvd_prefix "$sid" "$adv_interface" \
+ "$wancfg" "$(printf "0:0:0:%x::/64" $adv_subnet)" \
+ "$adv_valid_lifetime" "$adv_preferred_lifetime"
- /etc/init.d/radvd restart
- }
+ adv_subnets="${adv_subnets:+$adv_subnets }$adv_ifname:$subnet6"
+ adv_subnet=$(($adv_subnet + 1))
+ }
+ done
- logger -t "$link" "... started"
+ uci_set_state network "$cfg" adv_subnets "$adv_subnets"
- env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
- } || {
- echo "Cannot determine local IPv4 address for 6to4 tunnel $cfg - skipping"
+ /etc/init.d/radvd restart
}
}
-stop_interface_6to4() {
+proto_6to4_teardown() {
local cfg="$1"
local link="6to4-$cfg"
- local local6=$(uci_get_state network "$cfg" ip6addr)
- local defaultroute=$(uci_get_state network "$cfg" defaultroute)
-
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_subnets" ] && {
uci_revert_state radvd
/etc/init.d/radvd enabled && /etc/init.d/radvd restart
-
- 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" ] && {
- ip -6 route del 2000::/3 via ::192.88.99.1 dev $link metric 1
}
+ }
+}
- ip addr del $local6 dev $link
- ip link set $link down
- ip tunnel del $link
+proto_6to4_init_config() {
+ no_device=1
+ available=1
+
+ proto_config_add_string "ipaddr"
+ proto_config_add_int "mtu"
+ proto_config_add_int "ttl"
+ proto_config_add_string "adv_interface"
+ proto_config_add_string "adv_subnet"
+ proto_config_add_int "adv_valid_lifetime"
+ proto_config_add_int "adv_preferred_lifetime"
+}
- logger -t "$link" "... stopped"
- }
+[ -n "$INCLUDE_ONLY" ] || {
+ add_protocol 6to4
}
projects / openwrt.git / blobdiff