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Diffstat (limited to 'package/6to4/files/6to4.sh')
| -rwxr-xr-x | package/6to4/files/6to4.sh | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/package/6to4/files/6to4.sh b/package/6to4/files/6to4.sh new file mode 100755 index 000000000..3a616f675 --- /dev/null +++ b/package/6to4/files/6to4.sh @@ -0,0 +1,209 @@ +#!/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 +} |