mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
102 lines
2.5 KiB
Bash
Executable File
102 lines
2.5 KiB
Bash
Executable File
# 6in4.sh - IPv6-in-IPv4 tunnel backend
|
|
# Copyright (c) 2010 OpenWrt.org
|
|
|
|
find_6in4_wanif() {
|
|
local if=$(ip -4 r l e 0/0); if="${if#default* dev }"; if="${if%% *}"
|
|
[ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
|
|
}
|
|
|
|
find_6in4_wanip() {
|
|
local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
|
|
echo "${ip%%[^0-9.]*}"
|
|
}
|
|
|
|
# Hook into scan_interfaces() to synthesize a .device option
|
|
# This is needed for /sbin/ifup to properly dispatch control
|
|
# to setup_interface_6in4() even if no .ifname is set in
|
|
# the configuration.
|
|
scan_6in4() {
|
|
config_set "$1" device "6in4-$1"
|
|
}
|
|
|
|
coldplug_interface_6in4() {
|
|
setup_interface_6in4 "6in4-$1" "$1"
|
|
}
|
|
|
|
setup_interface_6in4() {
|
|
local iface="$1"
|
|
local cfg="$2"
|
|
local link="6in4-$cfg"
|
|
|
|
local local4=$(uci_get network "$cfg" ipaddr)
|
|
|
|
local remote4
|
|
config_get remote4 "$cfg" peeraddr
|
|
|
|
local local6
|
|
config_get local6 "$cfg" ip6addr
|
|
|
|
local mtu
|
|
config_get mtu "$cfg" mtu
|
|
|
|
local ttl
|
|
config_get ttl "$cfg" ttl
|
|
|
|
local defaultroute
|
|
config_get_bool defaultroute "$cfg" defaultroute 1
|
|
|
|
# If local4 is unset, guess local IPv4 address from the
|
|
# interface used by the default route.
|
|
[ -z "$local4" ] && {
|
|
local wanif=$(find_6in4_wanif)
|
|
[ -n "$wanif" ] && {
|
|
local4=$(find_6in4_wanip "$wanif")
|
|
uci_set_state network "$cfg" wan_device "$wanif"
|
|
}
|
|
}
|
|
|
|
[ -n "$local4" ] && {
|
|
# creating the tunnel below will trigger a net subsystem event
|
|
# prevent it from touching or iface by disabling .auto here
|
|
uci_set_state network "$cfg" ifname $link
|
|
uci_set_state network "$cfg" auto 0
|
|
|
|
ip tunnel add $link mode sit remote $remote4 local $local4 ttl ${ttl:-64}
|
|
ip link set $link up
|
|
ip link set mtu ${mtu:-1280} dev $link
|
|
ip addr add $local6 dev $link
|
|
|
|
uci_set_state network "$cfg" ipaddr $local4
|
|
uci_set_state network "$cfg" ip6addr $local6
|
|
|
|
[ "$defaultroute" = 1 ] && {
|
|
ip -6 route add ::/0 dev $link
|
|
uci_set_state network "$cfg" defaultroute 1
|
|
}
|
|
|
|
env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
|
|
} || {
|
|
echo "Cannot determine local IPv4 address for 6in4 tunnel $cfg - skipping"
|
|
}
|
|
}
|
|
|
|
stop_interface_6in4() {
|
|
local cfg="$1"
|
|
local link="6in4-$cfg"
|
|
|
|
local local6=$(uci_get_state network "$cfg" ip6addr)
|
|
local defaultroute=$(uci_get_state network "$cfg" defaultroute)
|
|
|
|
grep -qs "^ *$link:" /proc/net/dev && {
|
|
env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
|
|
|
|
[ "$defaultroute" = "1" ] && {
|
|
ip -6 route del ::/0 dev $link
|
|
}
|
|
|
|
ip addr del $local6 dev $link
|
|
ip link set $link down
|
|
ip tunnel del $link
|
|
}
|
|
}
|