--- /dev/null
+#!/bin/sh
+# 6to4.sh - IPv6-in-IPv4 tunnel backend
+# Copyright (c) 2010-2012 OpenWrt.org
+
+[ -n "$INCLUDE_ONLY" ] || {
+ . /lib/functions.sh
+ . /lib/functions/network.sh
+ . ../netifd-proto.sh
+ init_proto "$@"
+}
+
+find_6to4_prefix() {
+ local ip4="$1"
+ local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
+
+ 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
+
+ # RFC 6598
+ [ $1 -eq 100 ] && [ $2 -ge 64 ] && [ $2 -le 127 ] && return 0
+
+ return 1
+}
+
+set_6to4_radvd_interface() {
+ local cfgid="$1"
+ local lanif="${2:-lan}"
+ local ifmtu="${3:-1280}"
+ 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
+ uci_set_state radvd "$ifsection" AdvLinkMTU "$ifmtu"
+}
+
+set_6to4_radvd_prefix() {
+ local cfgid="$1"
+ local lanif="${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() {
+ 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 "$vlt"
+ uci_set_state radvd "$pfxsection" AdvPreferredLifetime "$plt"
+ uci_set_state radvd "$pfxsection" Base6to4Interface "$wanif"
+ }
+}
+
+proto_6to4_setup() {
+ local cfg="$1"
+ local iface="$2"
+ local link="6to4-$cfg"
+
+ local mtu ttl ipaddr adv_subnet adv_interface adv_valid_lifetime adv_preferred_lifetime
+ json_get_vars mtu ttl ipaddr adv_subnet adv_interface adv_valid_lifetime adv_preferred_lifetime
+
+ ( proto_add_host_dependency "$cfg" 0.0.0.0 )
+
+ local wanif
+ if ! network_find_wan wanif; then
+ proto_notify_error "$cfg" "NO_WAN_LINK"
+ return
+ fi
+
+ [ -z "$ipaddr" ] && {
+ if ! network_get_ipaddr ipaddr "$wanif"; then
+ proto_notify_error "$cfg" "NO_WAN_ADDRESS"
+ return
+ fi
+ }
+
+ test_6to4_rfc1918 "$ipaddr" && {
+ proto_notify_error "$cfg" "INVALID_LOCAL_ADDRESS"
+ return
+ }
+
+ # find our local prefix
+ local prefix6=$(find_6to4_prefix "$ipaddr")
+ local local6="$prefix6::1"
+
+ proto_init_update "$link" 1
+ proto_add_ipv6_address "$local6" 16
+ proto_add_ipv6_route "::" 0 "::192.88.99.1"
+
+ proto_add_tunnel
+ json_add_string mode sit
+ json_add_int mtu "${mtu:-1280}"
+ json_add_int ttl "${ttl:-64}"
+ json_add_string local "$ipaddr"
+ proto_close_tunnel
+
+ proto_send_update "$cfg"
+
+ [ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
+ local sid="6to4_$cfg"
+
+ uci_revert_state radvd
+ config_load radvd
+
+ adv_subnet=$((0x${adv_subnet:-1}))
+
+ local adv_subnets=""
+
+ for adv_interface in ${adv_interface:-lan}; do
+ local adv_ifname
+ network_get_device adv_ifname "${adv_interface:-lan}" || continue
+
+ 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" "$adv_interface" "$mtu"
+ set_6to4_radvd_prefix "$sid" "$adv_interface" \
+ "$wanif" "$(printf "0:0:0:%x::/64" $adv_subnet)" \
+ "$adv_valid_lifetime" "$adv_preferred_lifetime"
+
+ adv_subnets="${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
+ }
+}
+
+proto_6to4_teardown() {
+ local cfg="$1"
+ local link="6to4-$cfg"
+
+ local adv_subnets=$(uci_get_state network "$cfg" adv_subnets)
+
+ grep -qs "^ *$link:" /proc/net/dev && {
+ [ -n "$adv_subnets" ] && {
+ uci_revert_state radvd
+ /etc/init.d/radvd enabled && /etc/init.d/radvd restart
+ }
+ }
+}
+
+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"
+}
+
+[ -n "$INCLUDE_ONLY" ] || {
+ add_protocol 6to4
+}
projects / openwrt.git / blobdiff