config: add xfrm interface support scripts

This package adds scripts for xfrm interfaces support.
Example configuration via /etc/config/network:

config interface 'xfrm0'
        option proto 'xfrm'
        option mtu '1300'
        option zone 'VPN'
        option tunlink 'wan'
        option ifid 30

config interface 'xfrm0_static'
        option proto 'static'
        option ifname '@xfrm0'
        option ip6addr 'fe80::1/64'
        option ipaddr '10.0.0.1/30'

Now set in strongswan IPsec policy:
 	if_id_in = 30
	if_id_out = 30

Signed-off-by: André Valentin <avalentin@marcant.net>
This commit is contained in:
André Valentin 2019-06-08 13:48:08 +02:00 committed by Hans Dedecker
parent cc092a285a
commit 452d88e8f7
2 changed files with 103 additions and 0 deletions

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include $(TOPDIR)/rules.mk
PKG_NAME:=xfrm
PKG_VERSION:=1
PKG_RELEASE:=1
PKG_LICENSE:=GPL-2.0
include $(INCLUDE_DIR)/package.mk
define Package/xfrm/Default
SECTION:=net
CATEGORY:=Network
MAINTAINER:=Andre Valentin <avalentin@marcant.net>
endef
define Package/xfrm
$(call Package/xfrm/Default)
TITLE:=XFRM IPsec Tunnel Interface config support
DEPENDS:=+kmod-xfrm-interface
endef
define Package/xfrm/description
XFRM IPsec Tunnel Interface config support (IPv4 and IPv6) in /etc/config/network.
endef
define Build/Compile
endef
define Build/Configure
endef
define Package/xfrm/install
$(INSTALL_DIR) $(1)/lib/netifd/proto
$(INSTALL_BIN) ./files/xfrm.sh $(1)/lib/netifd/proto/xfrm.sh
endef
$(eval $(call BuildPackage,xfrm))

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#!/bin/sh
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
proto_xfrm_setup() {
local cfg="$1"
local mode="xfrm"
local tunlink ifid mtu zone
json_get_vars tunlink ifid mtu zone
proto_init_update "$cfg" 1
proto_add_tunnel
json_add_string mode "$mode"
json_add_int mtu "${mtu:-1280}"
[ -z "$tunlink" ] && {
proto_notify_error "$cfg" NO_TUNLINK
proto_block_restart "$cfg"
exit
}
json_add_string link "$tunlink"
[ -z "$ifid" ] && {
proto_notify_error "$cfg" NO_IFID
proto_block_restart "$cfg"
exit
}
json_add_object 'data'
[ -n "$ifid" ] && json_add_int ifid "$ifid"
json_close_object
proto_close_tunnel
proto_add_data
[ -n "$zone" ] && json_add_string zone "$zone"
proto_close_data
proto_send_update "$cfg"
}
proto_xfrm_teardown() {
local cfg="$1"
}
proto_xfrm_init_config() {
no_device=1
available=1
proto_config_add_int "mtu"
proto_config_add_string "tunlink"
proto_config_add_string "zone"
proto_config_add_int "ifid"
}
[ -n "$INCLUDE_ONLY" ] || {
[ -f /lib/modules/$(uname -r)/xfrm_interface.ko -o -d /sys/module/xfrm_interface ] && add_protocol xfrm
}