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#!/bin/sh |
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# |
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# This file is part of the FreeWRT project. FreeWRT is copyrighted |
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# material, please see the LICENCE file in the top-level directory |
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# or at http://www.freewrt.org/licence for details. |
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# |
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# Christian Fischer <spaetzle@freewrt.org> |
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# |
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|
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main_ifupdown() { |
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local environ=$(cat $ENVFILE) |
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|
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IFUPDOWN_ENV=$(echo -n $IFUPDOWN_ENV|sed 's/\(MDENT=\)[^ ]*[[:space:]]*//g';\ |
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echo " PARENT_IFACE_TYPE=$IFACE_TYPE"; \ |
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echo " PARENT_IFACE=$IFACE"; \ |
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echo " MDENT=$MDENT") \ |
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busybox "$@" |
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|
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retval=$? |
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grep -q RT_BB_NOEXEC=1 $ENVFILE && retval=0 |
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echo $environ >$ENVFILE |
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return $retval |
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} |
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|
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main_exit() { |
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[[ $1 != 0 ]] && echo "RT_ERR=1" >>$ENVFILE |
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exit $1 |
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} |
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|
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main_env_update() { |
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local t_mdent lastmatch= |
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|
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# get submode from calling hook script |
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SUBMODE=$(echo ${0%/*} |sed '{ s/\(.*\/\)*//; s/\.d$//}') |
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|
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# create env file |
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if ! [[ -f $ENVFILE ]]; then |
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[[ -d ${ENVFILE%/*} ]] || mkdir -p ${ENVFILE%/*} |
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echo "MDENT=0" >> $ENVFILE |
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echo "LASTLOG=0" >> $ENVFILE |
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|
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is_up && IFACE_STATE=up || IFACE_STATE=down |
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echo "IFACE_STATE=$IFACE_STATE" >>$ENVFILE |
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|
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if [[ $IFACE != lo ]]; then |
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# search for existing lib files end evaluate iface type by using the appropriate |
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# function from lib file |
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for lib in ${LIBDIR}/iftypes/*; do |
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[[ -f $lib ]] && (. $lib; iface_type 2>&-) || continue |
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if [[ -n $lastmatch ]]; then |
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if [[ ${lib##*/} = ${lastmatch##*/} ]]; then |
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mprint -s "Warning: $lib overlays $lastmatch" |
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else |
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mprint -s "Error: iface type $lib overlays $lastmatch" |
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fi |
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fi |
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lastmatch=$lib |
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done |
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fi |
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|
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# if iface type isn't evaluated type "iface" is default |
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[[ -n $lastmatch ]] && IFACE_TYPE=${lastmatch##*/} || IFACE_TYPE=iface |
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|
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# update env |
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echo "IFACE_TYPE=$IFACE_TYPE" >>$ENVFILE |
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fi |
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|
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. $ENVFILE |
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t_mdent=$MDENT |
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|
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# expand $IFUPDOWN_ENV |
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for var in $IFUPDOWN_ENV; do |
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eval $var |
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done |
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|
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[[ $t_mdent -gt $MDENT ]] && MDENT=$t_mdent |
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main_pos_update |
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} |
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|
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main_pos_update() { |
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[[ $MDENT = 0 ]] && STARTCOL= || \ |
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STARTCOL="[$(( ${MDENT:-0} * $TAB))C" |
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sed 's/MDENT=[0-9]*/'MDENT=$MDENT'/' -i $ENVFILE |
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} |
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|
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### global helper functions ### |
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|
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config() { |
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[[ $1 != 0 ]] |
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} |
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|
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iface_exists() { |
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grep -q "${1:-$IFACE}:" /proc/net/dev |
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} |
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|
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phys_exist() { |
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config $IFACE_LOGICAL && return |
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iface_exists && return |
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merr "No such device" |
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return 1 |
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} |
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|
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is_up() { |
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local iface=${1:-$IFACE} |
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|
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iface_exists $iface || return 1 |
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ip a|grep ${iface}:[[:space:]]|grep -q UP && return |
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|
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### ifupdown netlink bug workaround ### |
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# suppress "ip: RTNETLINK answers: File exists" message in the case of |
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# iface is down but an ip address is assigned |
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ip a|grep ${iface}$|grep -q inet && ip addr flush dev $iface >/dev/null 2>&1 |
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### end workaround ### |
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|
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return 1 |
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} |
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|
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### functions used by main up/down functions ### |
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### DON'T remove empty ones ### |
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|
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main_exec_hookscripts() { |
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for hook in ${LIBDIR}/${1}/${2}; do |
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[[ -f $hook ]] || continue |
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. $hook |
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eval "${hook##*/}_$3" || [[ $? = 127 ]] || exit |
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done |
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} |
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|
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main_bb_methods_override() { |
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[[ -r ${LIBDIR}/methods/$METHOD ]] || return |
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. ${LIBDIR}/methods/$METHOD |
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whence ${METHOD}_$1 2>&- 1>&- || return |
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|
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# fake busybox ifupdown.c up or down code |
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case $1 in |
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up) |
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eval $IF_PRE_UP |
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eval ${METHOD}_$1 || exit |
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eval $IF_UP |
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# call up function from here because we leave |
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# run-parts after returning |
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main_up |
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;; |
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down) |
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eval $IF_DOWN |
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eval ${METHOD}_$1 || exit |
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eval $IF_POST_DOWN |
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main_postdown |
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;; |
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esac |
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|
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RT_BB_NOEXEC=1 |
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} |
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|
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main_exec_pcode() { |
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[[ -d /tmp/ifupdown/pcode/$IFACE ]] || return |
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for dir in /tmp/ifupdown/pcode/${IFACE}/*; do |
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[[ -f ${dir}/$1 ]] || continue |
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. ${dir}/$1 |
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done |
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} |
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|
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prereq_preup() { |
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main_prereq_preup |
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} |
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|
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main_prereq_preup() { |
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# workaround for the failsafe |
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# ip link set down dev eth0 |
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# pingpong problem |
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[[ -f /tmp/.booting ]] && return |
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|
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is_up || return 0 |
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mup |
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mstate 1 |
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minfo "Interface already up" |
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exit 1 |
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} |
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|
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prereq_up() { |
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main_prereq_up |
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} |
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|
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main_prereq_up() { |
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is_up |
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mstate $? || exit |
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} |
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|
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prereq_down() { |
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: |
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} |
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|
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prereq_postdown() { |
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main_prereq_postdown |
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} |
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|
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main_prereq_postdown() { |
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is_up |
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mstate $((!$?)) || exit |
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[[ $IFACE_STATE = down ]] && minfo "Interface already down" |
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return 0 |
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} |
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|
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if_preup() { |
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: |
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} |
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|
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if_up() { |
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: |
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} |
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|
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if_down() { |
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: |
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} |
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|
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if_postdown() { |
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: |
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} |
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|
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### main up/down functions ### |
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|
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main_preup() { |
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# print start message |
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mstart |
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|
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# break if device is physical and not exist |
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phys_exist || exit |
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|
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# check iface state and print state message |
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# break if iface is already up |
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prereq_preup || exit |
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|
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# execute "pre busybox up" function |
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# sourced from appropriate iftype script |
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if_preup || fail_preup || exit |
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|
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# print "going up" message |
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mup |
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|
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# execute plugins |
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main_exec_hookscripts plugins '*' preup |
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|
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# execute method preup function if present |
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main_exec_hookscripts methods $METHOD preup |
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|
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# override busybox ifupdown.c method if function present |
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main_bb_methods_override up |
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|
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# bypass execution of further busybox ifupdown.c code |
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config $RT_BB_NOEXEC || return 0 |
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echo RT_BB_NOEXEC=1 >>$ENVFILE |
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builtin exit 1 |
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} |
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|
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main_up() { |
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# execute method postup function if present |
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main_exec_hookscripts methods $METHOD postup |
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|
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# execute plugins |
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main_exec_hookscripts plugins '*' up |
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|
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# check iface state and print state message |
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# break if iface isn't up |
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prereq_up || exit |
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|
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# execute "post busybox up" function |
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# sourced from appropriate iftype script |
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if_up || fail_up || exit |
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|
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# execute postcode if present |
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main_exec_pcode postup |
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} |
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|
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main_down() { |
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# print stop message |
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mstop |
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|
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# break if device is physical and not exist |
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phys_exist || exit |
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|
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# nothing predefined |
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prereq_down || exit |
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|
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# execute postcode if present |
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main_exec_pcode predown |
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|
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# execute "pre busybox down" function |
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# sourced from appropriate iftype script |
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if_down || fail_down || exit |
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|
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# print "going down" message |
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mdown |
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|
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# execute plugins |
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main_exec_hookscripts plugins '*' down |
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|
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# execute method predown function if present |
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main_exec_hookscripts methods $METHOD predown |
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|
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# override busybox ifupdown.c method if userspace function present |
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main_bb_methods_override down |
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|
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# bypass execution of further busybox ifupdown.c code |
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config $RT_BB_NOEXEC || return 0 |
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echo RT_BB_NOEXEC=1 >>$ENVFILE |
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builtin exit 1 |
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} |
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|
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main_postdown() { |
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# execute method postdown function if present |
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main_exec_hookscripts methods $METHOD postdown |
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|
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# execute plugins |
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main_exec_hookscripts plugins '*' postdown |
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|
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# check iface state and print state message |
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# break if iface isn't down |
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prereq_postdown || exit |
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|
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# execute "post busybox down" function |
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# sourced from appropriate iftype script |
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if_postdown || fail_postdown || exit |
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|
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# pcode cleanup |
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rm -rf /tmp/ifupdown/pcode/*/$IFACE 2>&- 1>&- |
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} |
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|
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### main entry point ### |
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|
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FWIFUPDOWN_PRINTING_OFF=0 |
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FWIFUPDOWN_SYSLOG_OFF=0 |
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FWIFUPDOWN_FANCY=0 |
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FWIFUPDOWN_DEBUG=0 |
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|
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. /etc/rc.conf |
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|
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config $FWIFUPDOWN_DEBUG && set -x |
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|
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RT_BB_NOEXEC=0 |
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RT_ERR=0 |
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readonly ENVFILE="/tmp/ifupdown/env" |
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readonly LIBDIR="/etc/network" |
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IFACE_TYPE="none" |
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|
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alias exit="main_exit" |
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alias ifup="main_ifupdown ifup" |
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alias ifdown="main_ifupdown ifdown" |
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|
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if [[ ! -f /etc/network/mfunctions.sh ]]; then |
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logger -t ifupdown "/etc/network/mfunctions.sh not found" |
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exit 1 |
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fi |
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. /etc/network/mfunctions.sh |
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|
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main_env_update |
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|
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config $RT_ERR && builtin exit 1 |
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|
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if [[ $IFACE_TYPE != iface ]]; then |
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if [[ -f ${LIBDIR}/iftypes/$IFACE_TYPE ]]; then |
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. ${LIBDIR}/iftypes/$IFACE_TYPE |
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else |
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mprint -s "Error: libfile $IFACE_TYPE not found" |
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fi |
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fi |
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|
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case $SUBMODE in |
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if-pre-up) |
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main_preup |
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;; |
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if-up) |
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main_up |
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;; |
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if-down) |
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main_down |
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;; |
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if-post-down) |
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main_postdown |
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;; |
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esac |
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|
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exit 0 |
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|
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# vim:ts=4 |
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