mirror of https://github.com/hak5/openwrt.git
Steven Barth
parent
e6e6e0d152
commit
a4edea5ef3
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#
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# Copyright (C) 2010-2012 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk
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PKG_NAME:=ipv6-support
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PKG_VERSION:=2012-11-29
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PKG_RELEASE:=1
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include $(INCLUDE_DIR)/package.mk
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define Package/ipv6-support
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SECTION:=ipv6
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CATEGORY:=IPv6
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DEPENDS:=+kmod-ipv6 +6relayd +odhcp6c +6distributed +ip6tables +ubus
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TITLE:=Basic IPv6-support for Customer Edge Routers
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MAINTAINER:=Steven Barth <steven@midlink.org>
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PKGARCH:=all
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endef
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define Package/ipv6-support/description
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This package provides basic IPv6 support including Router Discovery,
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DHCPv6 (client & server), prefix delegation and distribution.
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endef
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define Build/Compile
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endef
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define Build/Configure
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endef
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define Package/ipv6-support/install
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$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
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$(INSTALL_DATA) ./files/ipv6.hotplug $(1)/etc/hotplug.d/iface/20-ipv6
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$(INSTALL_DIR) $(1)/lib/ipv6
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$(INSTALL_DATA) ./files/support.sh $(1)/lib/ipv6/support.sh
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$(INSTALL_BIN) ./files/dhcpv6.sh $(1)/lib/ipv6/dhcpv6.sh
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$(INSTALL_DIR) $(1)/etc/config
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$(INSTALL_DATA) ./files/network6.config $(1)/etc/config/network6
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endef
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$(eval $(call BuildPackage,ipv6-support))
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#!/bin/sh
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# Copyright (c) 2012 OpenWrt.org
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. /lib/ipv6/support.sh
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. /lib/netifd/netifd-proto.sh
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local device="$1"
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local state="$2"
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local network=""
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resolve_network network "$device"
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# Unknown network
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[ -z "$network" ] && exit 0
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# Announce prefixes
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for prefix in $PREFIXES; do
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announce_prefix "$prefix" "$network"
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done
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for prefix in $PREFIXES_LOST; do
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announce_prefix "$prefix" "$network" delprefix
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done
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# Enable relaying if requested
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local prefix_fallback
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config_get prefix_fallback "$network" prefix_fallback
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[ "$prefix_fallback" == "relay" -a -z "$PREFIXES" -a "$state" != "unbound" ] &&
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restart_relay "$network" 1
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# Disable relay if requested
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[ "$prefix_fallback" != "relay" -o -n "$PREFIXES" -o "$state" == "unbound" ] &&
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stop_relay "$network"
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# Operations in case of success
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[ "$state" == "timeout" || "$state" == "unbound" ] && exit 0
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local peerdns
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config_get_bool peerdns "$network" peerdns 0
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[ "peerdns" -eq "1" ] && {
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proto_init_update "*" 1
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for server in $RDNSS; do
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proto_add_dns_server "$server"
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done
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for domain in $DOMAINS; do
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proto_add_dns_search "$domain"
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done
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proto_send_update "$network"
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}
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#!/bin/sh
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# Copyright (c) 2012 OpenWrt.org
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[ "$DEVICE" == "lo" ] && exit 0
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. /lib/ipv6/support.sh
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local mode
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config_get mode "$INTERFACE" mode
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case "$ACTION" in
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ifup)
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[ "$mode" != "downstream" ] && enable_static $INTERFACE $DEVICE
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[ "$mode" == "upstream" ] && enable_upstream $INTERFACE $DEVICE
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[ "$mode" == "downstream" ] && enable_downstream $INTERFACE $DEVICE
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;;
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ifdown)
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disable_interface $INTERFACE $DEVICE
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;;
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esac
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@ -0,0 +1,17 @@
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config interface wan
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option mode upstream
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option ula_prefix auto
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option request_prefix auto
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option prefix_fallback relay
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option peerdns 1
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config interface lan
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option mode downstream
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option advertise_prefix 64
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option relay_master wan
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config interface 6in4
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option mode static
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list static_prefix 2001:DB8::/48
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#!/bin/sh
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# Copyright (c) 2012 OpenWrt.org
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. /lib/functions.sh
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. /lib/functions/service.sh
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. /lib/functions/network.sh
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config_load network6
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conf_get() {
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local __return="$1"
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local __device="$2"
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local __option="$3"
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local __value=$(cat "/proc/sys/net/ipv6/conf/$device/$option")
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eval "$__return=$__value"
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}
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conf_set() {
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local device="$1"
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local option="$2"
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local value="$3"
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echo "$value" > "/proc/sys/net/ipv6/conf/$device/$option"
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}
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stop_service() {
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local __exe="$1"
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SERVICE_PID_FILE="$2"
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local __return="$3"
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service_check "$__exe" && {
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service_stop "$__exe"
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[ -n "$__return" ] && eval "$__return=1"
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}
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rm -f "$SERVICE_PID_FILE"
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}
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start_service() {
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local cmd="$1"
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local pidfile="$2"
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SERVICE_DAEMONIZE=1
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SERVICE_WRITE_PID=1
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SERVICE_PID_FILE="$pidfile"
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service_start $cmd
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}
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resolve_network_add() {
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local __section="$1"
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local __device="$2"
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local __return="$3"
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local __cdevice
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network_get_device __cdevice "$__section"
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[ "$__cdevice" != "$__device" ] && return
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eval "$__return"'="'"$__section"'"'
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}
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resolve_network() {
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local __return="$1"
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local __device="$2"
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config_foreach resolve_network_add interface "$__device" "$__return"
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}
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announce_prefix() {
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local prefix="$1"
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local network="$2"
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local cmd="$3"
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local addr=$(echo "$prefix" | cut -d/ -f1)
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local rem=$(echo "$prefix" | cut -d/ -f2)
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local length=$(echo "$rem" | cut -d, -f1)
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local prefer=""
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local valid=""
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# If preferred / valid provided
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[ "$rem" != "$length" ] && {
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prefer=$(echo "$rem" | cut -d, -f2)
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valid=$(echo "$rem" | cut -d, -f3)
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}
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local msg='{"network": "'"$network"'", "prefix": "'"$addr"'", "length": '"$length"
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[ -n "$valid" ] && msg="$msg"', "valid": '"$valid"', "preferred": '"$prefer"
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[ -z "$cmd" ] && cmd=newprefix
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ubus call 6distributed "$cmd" "$msg}"
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}
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disable_downstream() {
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local network="$1"
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# Notify the address distribution daemon
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ubus call 6distributed deliface '{"network": "'"$network"'"}'
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# Disable advertisement daemon
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stop_service /usr/sbin/6relayd "/var/run/ipv6-downstream-$network.pid"
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}
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restart_relay_add() {
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local __section="$1"
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local __return="$2"
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local __master="$3"
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local __disable="$4"
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network_is_up "$__section" || return
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# Match master network
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local __cmaster=""
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config_get __cmaster "$__section" relay_master
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[ "$__master" != "$__cmaster" ] && return
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# Disable any active distribution
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disable_downstream "$__section"
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local __device=""
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network_get_device __device "$__section"
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# Coming from stop relay, reenable distribution
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[ "$__disable" == "disable" ] && {
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enable_downstream "$__section" "$__device"
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return
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}
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eval "$__return"'="$'"$__return"' '"$__device"'"'
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}
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stop_relay() {
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local network="$1"
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local pid="/var/run/ipv6-relay-$network.pid"
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local was_running=""
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stop_service /usr/sbin/6relayd "$pid" was_running
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# Reenable normal distribution on slave interfaces
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[ -n "$was_running" ] && config_foreach restart_relay_add interface dummy "$network" disable
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}
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restart_relay() {
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local network="$1"
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local force="$2"
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local pid="/var/run/ipv6-relay-$network.pid"
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local not_running=0
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[ -f "$pid" ] || not_running=1
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# Don't start if not desired
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[ "$force" != "1" ] && [ "$not_running" == "1" ] && return
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# Kill current relay and distribution daemon
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stop_relay "$network"
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# Detect master device
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local device=""
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network_get_device device $network
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# Generate command string
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local cmd="/usr/sbin/6relayd -A $device "
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config_foreach restart_relay_add interface cmd "$network"
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# Start relay
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start_service "$cmd" "$pid"
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}
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restart_master_relay() {
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local network="$1"
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# Disable active relaying to this interface
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local relay_master
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config_get relay_master "$network" relay_master
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[ -n "$relay_master" ] && restart_relay "$relay_master"
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}
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disable_interface() {
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local network="$1"
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# Delete all prefixes routed to this interface
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ubus call 6distributed delprefix '{"network": "'"$network"'"}'
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# Restart Relay
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restart_master_relay "$network"
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# Disable distribution
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disable_downstream "$network"
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# Disable relay
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stop_relay "$network"
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# Disable DHCPv6 client if enabled, state script will take care
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stop_service /usr/sbin/odhcp6c "/var/run/ipv6-upstream-$network.pid"
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}
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enable_static() {
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local network="$1"
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local device="$2"
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# Enable global forwarding
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local global_forward
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conf_get global_forward all forwarding
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[ "$global_forward" != "1" ] && conf_set all forwarding 1
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# Configure device
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conf_set "$device" accept_ra 1
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conf_set "$device" forwarding 1
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# ULA-integration
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local ula_prefix=""
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config_get ula_prefix "$network" ula_prefix
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# ULA auto configuration (first init)
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[ "$ula_prefix" == "auto" ] && {
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local r1=""
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local r2=""
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local r3=""
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# Sometimes results are empty, therefore try until it works...
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while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
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r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
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r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
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r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
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done
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ula_prefix="fd$r1:$r2:$r3::/48"
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# Save prefix so it will be preserved across reboots
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uci set network6.$network.ula_prefix=$ula_prefix
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uci commit network6
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}
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# Announce ULA
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[ -n "$ula_prefix" ] && announce_prefix $ula_prefix $network
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# Announce all static prefixes
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config_list_foreach "$network" static_prefix announce_prefix $network
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}
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enable_downstream() {
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local network="$1"
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local device="$2"
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# Get IPv6 prefixes
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local length
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config_get length "$network" advertise_prefix
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[ -z "$length" ] && length=64
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[ "$length" -ne "0" ] && ubus call 6distributed newiface '{"network": "'"$network"'", "iface": "'"$device"'", "length": '"$length"'}'
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# Start RD & DHCPv6 service
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local pid="/var/run/ipv6-downstream-$network.pid"
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start_service "/usr/sbin/6relayd -Rserver -Dserver . $device" "$pid"
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# Try relaying if necessary
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restart_master_relay "$network"
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}
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enable_upstream() {
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local network="$1"
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local device="$2"
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# Configure device
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conf_set "$device" accept_ra 2
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conf_set "$device" forwarding 2
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# Trigger RS
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conf_set "$device" disable_ipv6 1
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conf_set "$device" disable_ipv6 0
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# Configure DHCPv6-client
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local dhcp6_opts="$device"
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# Configure DHCPv6-client (e.g. requested prefix)
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local request_prefix
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config_get request_prefix "$network" request_prefix
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[ -z "$request_prefix" ] && request_prefix="auto"
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[ "$request_prefix" != "no" ] && {
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[ "$request_prefix" == "auto" ] && request_prefix=0
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dhcp6_opts="-P$request_prefix $dhcp6_opts"
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}
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# Start DHCPv6 client
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local pid="/var/run/ipv6-upstream-$network.pid"
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start_service "/usr/sbin/odhcp6c -s/lib/ipv6/dhcpv6.sh $dhcp6_opts" "$pid"
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# Refresh RA on all interfaces
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for pid in /var/run/ipv6-downstream-*.pid; do
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kill -SIGUSR1 $(cat "$pid")
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done
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}
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