openwrt/package/network/config/vti/files/vti.sh
Felix Fietkau e2e8cb8347 network: add virtual tunnel interface (VTI) support
This adds support for configuring VTI interfaces within /etc/config/network.
VTI interfaces are used to create IPsec tunnel interfaces. These interfaces
may be used for routing and other purposes.

Example config:
config interface 'vti1'
	option proto 'vti'
	option mtu '1500'
	option tunlink 'wan'
	option peeraddr '192.168.5.16'
	option zone 'VPN'
	option ikey 2
	option okey 2

config interface 'vti1_static'
	option proto 'static'
	option ifname '@vti1'
	option ipaddr '192.168.7.2/24'

The options ikey and okey correspond to the fwmark value of a ipsec policy.
The may be null if you do not want fwmarks.
Also peeraddr may be 0.0.0 if you want all ESP packets go through the
interface.
Example strongswan config:
conn vti
	left=%any
	leftcert=peer2.test.der
	leftid=@peer2.test
	right=192.168.5.16
	rightid=@peer3.test
	leftsubnet=0.0.0.0/0
	rightsubnet=0.0.0.0/0
	mark=2
	auto=route

Signed-off-by: André Valentin <avalentin@marcant.net>

SVN-Revision: 48274
2016-01-17 11:06:02 +00:00

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#!/bin/sh
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
vti_generic_setup() {
local cfg="$1"
local mode="$2"
local local="$3"
local remote="$4"
local link="$5"
local mtu zone ikey
json_get_vars mtu zone ikey okey
[ -z "$zone" ] && zone="wan"
proto_init_update "$link" 1
proto_add_tunnel
json_add_string mode "$mode"
json_add_int mtu "${mtu:-1280}"
json_add_string local "$local"
json_add_string remote "$remote"
[ -n "$tunlink" ] && json_add_string link "$tunlink"
json_add_string info "${ikey:-0},${okey:-0}"
proto_close_tunnel
proto_add_data
[ -n "$zone" ] && json_add_string zone "$zone"
proto_close_data
proto_send_update "$cfg"
}
vti_setup() {
local cfg="$1"
local mode="$2"
local ipaddr peeraddr
json_get_vars df ipaddr peeraddr tunlink
[ -z "$peeraddr" ] && {
proto_notify_error "$cfg" "MISSING_ADDRESS"
proto_block_restart "$cfg"
exit
}
( proto_add_host_dependency "$cfg" "$peeraddr" "$tunlink" )
[ -z "$ipaddr" ] && {
local wanif="$tunlink"
if [ -z $wanif ] && ! network_find_wan wanif; then
proto_notify_error "$cfg" "NO_WAN_LINK"
exit
fi
if ! network_get_ipaddr ipaddr "$wanif"; then
proto_notify_error "$cfg" "NO_WAN_LINK"
exit
fi
}
vti_generic_setup $cfg $mode $ipaddr $peeraddr "vti-$cfg"
}
proto_vti_setup() {
local cfg="$1"
vti_setup $cfg "vtiip"
}
vti6_setup() {
local cfg="$1"
local mode="$2"
local ip6addr peer6addr weakif
json_get_vars ip6addr peer6addr tunlink weakif
[ -z "$peer6addr" ] && {
proto_notify_error "$cfg" "MISSING_ADDRESS"
proto_block_restart "$cfg"
exit
}
( proto_add_host_dependency "$cfg" "$peer6addr" "$tunlink" )
[ -z "$ip6addr" ] && {
local wanif="$tunlink"
if [ -z $wanif ] && ! network_find_wan6 wanif; then
proto_notify_error "$cfg" "NO_WAN_LINK"
exit
fi
if ! network_get_ipaddr6 ip6addr "$wanif"; then
[ -z "$weakif" ] && weakif="lan"
if ! network_get_ipaddr6 ip6addr "$weakif"; then
proto_notify_error "$cfg" "NO_WAN_LINK"
exit
fi
fi
}
vti_generic_setup $cfg $mode $ip6addr $peer6addr "vti6-$cfg"
}
proto_vti6_setup() {
local cfg="$1"
vti6_setup $cfg "vtiip6"
}
proto_vti_teardown() {
local cfg="$1"
}
proto_vti6_teardown() {
local cfg="$1"
}
vti_generic_init_config() {
no_device=1
available=1
proto_config_add_int "mtu"
proto_config_add_string "tunlink"
proto_config_add_string "zone"
proto_config_add_int "ikey"
proto_config_add_int "okey"
}
proto_vti_init_config() {
vti_generic_init_config
proto_config_add_string "ipaddr"
proto_config_add_string "peeraddr"
}
proto_vti6_init_config() {
vti_generic_init_config
proto_config_add_string "ip6addr"
proto_config_add_string "peer6addr"
proto_config_add_string "weakif"
}
[ -n "$INCLUDE_ONLY" ] || {
[ -f /lib/modules/$(uname -r)/ip_vti.ko ] && add_protocol vti
[ -f /lib/modules/$(uname -r)/ip6_vti.ko ] && add_protocol vti6
}