Felix Fietkau
13 years ago
parent
b60539115e
commit
7dcb1402e5
@ -0,0 +1,34 @@ |
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#!/bin/sh |
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|
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if [ "$ACTION" = ifup ]; then |
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. /etc/functions.sh |
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include /lib/network |
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scan_interfaces |
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update_tunnel() { |
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local cfg="$1" |
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local proto |
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config_get proto "$cfg" proto |
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[ "$proto" = 6to4 ] || return 0 |
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local wandev |
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config_get wandev "$cfg" wan_device "$(find_6to4_wanif)" |
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[ "$wandev" = "$DEVICE" ] || return 0 |
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local wanip=$(find_6to4_wanip "$wandev") |
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[ -n "$wanip" ] && { |
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lsmod | grep -q ^sit || { |
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logger -t 6to4 "Tunneling driver not loaded yet, deferring action" |
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exit 0 |
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} |
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uci_set_state network "$cfg" ipaddr "$wanip" |
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( ifup "$cfg" )& |
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} |
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} |
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config_foreach update_tunnel interface |
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fi |
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@ -0,0 +1,273 @@ |
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# 6to4.sh - IPv6-in-IPv4 tunnel backend |
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# Copyright (c) 2010-2011 OpenWrt.org |
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find_6to4_wanif() { |
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local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}" |
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[ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if" |
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} |
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find_6to4_wanip() { |
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local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }" |
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echo "${ip%%[^0-9.]*}" |
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} |
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find_6to4_prefix() { |
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local ip4="$1" |
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local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS" |
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printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4 |
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} |
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test_6to4_rfc1918() |
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{ |
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local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS" |
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[ $1 -eq 10 ] && return 0 |
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[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0 |
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[ $1 -eq 172 ] && [ $2 -ge 16 ] && [ $2 -le 31 ] && return 0 |
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return 1 |
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} |
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set_6to4_radvd_interface() { |
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local cfgid="$1" |
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local lanif="${2:-lan}" |
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local ifmtu="${3:-1280}" |
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local ifsection="" |
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find_ifsection() { |
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local net |
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local cfg="$1" |
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config_get net "$cfg" interface |
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[ "$net" = "$lanif" ] && { |
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ifsection="$cfg" |
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return 1 |
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} |
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} |
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config_foreach find_ifsection interface |
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[ -z "$ifsection" ] && { |
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ifsection="iface_$sid" |
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uci_set_state radvd "$ifsection" "" interface |
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uci_set_state radvd "$ifsection" interface "$lanif" |
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} |
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uci_set_state radvd "$ifsection" ignore 0 |
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uci_set_state radvd "$ifsection" IgnoreIfMissing 1 |
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uci_set_state radvd "$ifsection" AdvSendAdvert 1 |
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uci_set_state radvd "$ifsection" MaxRtrAdvInterval 30 |
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uci_set_state radvd "$ifsection" AdvLinkMTU "$ifmtu" |
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} |
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set_6to4_radvd_prefix() { |
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local cfgid="$1" |
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local lanif="${2:-lan}" |
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local wanif="${3:-wan}" |
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local prefix="${4:-0:0:0:1::/64}" |
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local vlt="${5:-300}" |
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local plt="${6:-120}" |
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local pfxsection="" |
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find_pfxsection() { |
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local net base |
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local cfg="$1" |
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config_get net "$cfg" interface |
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config_get base "$cfg" Base6to4Interface |
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[ "$net" = "$lanif" ] && [ "$base" = "$wanif" ] && { |
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pfxsection="$cfg" |
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return 1 |
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} |
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} |
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config_foreach find_pfxsection prefix |
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[ -z "$pfxsection" ] && { |
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pfxsection="prefix_${sid}_${lanif}" |
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uci_set_state radvd "$pfxsection" "" prefix |
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uci_set_state radvd "$pfxsection" ignore 0 |
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uci_set_state radvd "$pfxsection" interface "$lanif" |
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uci_set_state radvd "$pfxsection" prefix "$prefix" |
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uci_set_state radvd "$pfxsection" AdvOnLink 1 |
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uci_set_state radvd "$pfxsection" AdvAutonomous 1 |
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uci_set_state radvd "$pfxsection" AdvValidLifetime "$vlt" |
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uci_set_state radvd "$pfxsection" AdvPreferredLifetime "$plt" |
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uci_set_state radvd "$pfxsection" Base6to4Interface "$wanif" |
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} |
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} |
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# Hook into scan_interfaces() to synthesize a .device option |
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# This is needed for /sbin/ifup to properly dispatch control |
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# to setup_interface_6to4() even if no .ifname is set in |
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# the configuration. |
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scan_6to4() { |
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config_set "$1" device "6to4-$1" |
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} |
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coldplug_interface_6to4() { |
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setup_interface_6to4 "6to4-$1" "$1" |
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} |
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setup_interface_6to4() { |
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local iface="$1" |
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local cfg="$2" |
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local link="6to4-$cfg" |
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local local4=$(uci_get network "$cfg" ipaddr) |
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local mtu |
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config_get mtu "$cfg" mtu |
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local ttl |
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config_get ttl "$cfg" ttl |
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local metric |
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config_get metric "$cfg" metric |
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local defaultroute |
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config_get_bool defaultroute "$cfg" defaultroute 1 |
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local wanif=$(find_6to4_wanif) |
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[ -z "$wanif" ] && { |
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logger -t "$link" "Cannot find wan interface - aborting" |
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return |
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} |
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local wancfg=$(find_config "$wanif") |
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[ -z "$wancfg" ] && { |
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logger -t "$link" "Cannot find wan network - aborting" |
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return |
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} |
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# If local4 is unset, guess local IPv4 address from the |
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# interface used by the default route. |
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[ -z "$local4" ] && { |
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[ -n "$wanif" ] && { |
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local4=$(find_6to4_wanip "$wanif") |
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uci_set_state network "$cfg" wan_device "$wanif" |
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} |
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} |
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test_6to4_rfc1918 "$local4" && { |
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logger -t "$link" "Local wan ip $local4 is private - aborting" |
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return |
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} |
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[ -n "$local4" ] && { |
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logger -t "$link" "Starting ..." |
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# creating the tunnel below will trigger a net subsystem event |
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# prevent it from touching or iface by disabling .auto here |
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uci_set_state network "$cfg" ifname $link |
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uci_set_state network "$cfg" auto 0 |
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# find our local prefix |
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local prefix6=$(find_6to4_prefix "$local4") |
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local local6="$prefix6::1/16" |
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logger -t "$link" " * IPv4 address is $local4" |
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logger -t "$link" " * IPv6 address is $local6" |
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ip tunnel add $link mode sit remote any local $local4 ttl ${ttl:-64} |
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ip link set $link up |
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ip link set mtu ${mtu:-1280} dev $link |
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ip addr add $local6 dev $link |
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uci_set_state network "$cfg" ipaddr $local4 |
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uci_set_state network "$cfg" ip6addr $local6 |
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[ "$defaultroute" = 1 ] && { |
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logger -t "$link" " * Adding default route" |
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ip -6 route add ::/0 via ::192.88.99.1 metric ${metric:-1} dev $link |
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uci_set_state network "$cfg" defaultroute 1 |
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} |
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[ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && { |
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local sid="6to4_$cfg" |
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uci_revert_state radvd |
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config_load radvd |
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# find delegation target |
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local adv_interface |
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config_get adv_interface "$cfg" adv_interface |
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local adv_subnet=$(uci_get network "$cfg" adv_subnet) |
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adv_subnet=$((0x${adv_subnet:-1})) |
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local adv_subnets="" |
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for adv_interface in ${adv_interface:-lan}; do |
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local adv_ifname |
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config_get adv_ifname "${adv_interface:-lan}" ifname |
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grep -qs "^ *$adv_ifname:" /proc/net/dev && { |
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local adv_valid_lifetime adv_preferred_lifetime |
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config_get adv_valid_lifetime "$cfg" adv_valid_lifetime |
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config_get adv_preferred_lifetime "$cfg" adv_preferred_lifetime |
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local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)" |
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logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)" |
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ip -6 addr add $subnet6 dev $adv_ifname |
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set_6to4_radvd_interface "$sid" "$adv_interface" "$mtu" |
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set_6to4_radvd_prefix "$sid" "$adv_interface" \ |
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"$wancfg" "$(printf "0:0:0:%x::/64" $adv_subnet)" \ |
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"$adv_valid_lifetime" "$adv_preferred_lifetime" |
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adv_subnets="${adv_subnets:+$adv_subnets }$adv_ifname:$subnet6" |
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adv_subnet=$(($adv_subnet + 1)) |
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} |
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done |
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uci_set_state network "$cfg" adv_subnets "$adv_subnets" |
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/etc/init.d/radvd restart |
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} |
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logger -t "$link" "... started" |
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env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" & |
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} || { |
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echo "Cannot determine local IPv4 address for 6to4 tunnel $cfg - skipping" |
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} |
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} |
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stop_interface_6to4() { |
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local cfg="$1" |
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local link="6to4-$cfg" |
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local local6=$(uci_get_state network "$cfg" ip6addr) |
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local defaultroute=$(uci_get_state network "$cfg" defaultroute) |
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local adv_subnets=$(uci_get_state network "$cfg" adv_subnets) |
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grep -qs "^ *$link:" /proc/net/dev && { |
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logger -t "$link" "Shutting down ..." |
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env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" & |
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[ -n "$adv_subnets" ] && { |
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uci_revert_state radvd |
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/etc/init.d/radvd enabled && /etc/init.d/radvd restart |
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local adv_subnet |
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for adv_subnet in $adv_subnets; do |
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local ifname="${adv_subnet%%:*}" |
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local subnet="${adv_subnet#*:}" |
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logger -t "$link" " * Removing IPv6 subnet $subnet from interface $ifname" |
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ip -6 addr del $subnet dev $ifname |
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done |
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} |
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[ "$defaultroute" = "1" ] && \ |
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ip -6 route del ::/0 via ::192.88.99.1 dev $link |
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ip addr del $local6 dev $link |
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ip link set $link down |
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ip tunnel del $link |
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logger -t "$link" "... stopped" |
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} |
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} |
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