| 1 | #!/bin/sh
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| 2 | #
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| 3 | # This file is part of the FreeWRT project. FreeWRT is copyrighted
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| 4 | # material, please see the LICENCE file in the top-level directory
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| 5 | # or at http://www.freewrt.org/licence for details.
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| 6 | #
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| 7 | # Christian Fischer <spaetzle@freewrt.org>
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| 8 | #
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| 9 |
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| 10 | built_in() {
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| 11 | local what=$1
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| 12 | local alias=$(alias $what)
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| 13 | unalias $what
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| 14 | alias $(echo $alias|sed 's/'\''//g')
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| 15 | shift
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| 16 | $what $@
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| 17 | }
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| 18 |
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| 19 | config() {
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| 20 | [ x"$1" != x"0" ]
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| 21 | }
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| 22 |
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| 23 | __ifupdown() {
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| 24 | local environ=$(cat $ENVFILE)
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| 25 |
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| 26 | IFUPDOWN_ENV=$(echo -n $IFUPDOWN_ENV|sed 's/\(MDENT=\)[^ ]*[[:space:]]*//g';\
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| 27 | echo " PARENT_IFACE_TYPE=$IFACE_TYPE"; \
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| 28 | echo " PARENT_IFACE=$IFACE"; \
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| 29 | echo " MDENT=$MDENT") \
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| 30 | busybox "$@"
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| 31 |
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| 32 | retval=$?
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| 33 | echo $environ > $ENVFILE
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| 34 | return $retval
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| 35 | }
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| 36 |
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| 37 | __exit() {
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| 38 | [ x"$1" != x"0" ] && echo "RT_ERR=1" >> $ENVFILE
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| 39 | exit $1
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| 40 | }
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| 41 |
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| 42 | iface_exists() {
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| 43 | grep -q "${1:-$IFACE}:" /proc/net/dev
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| 44 | }
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| 45 |
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| 46 | is_up() {
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| 47 | local iface=${1:-$IFACE}
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| 48 |
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| 49 | if iface_exists $iface
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| 50 | then
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| 51 | ip a|grep ${iface}:[[:space:]]|grep -q UP && return
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| 52 |
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| 53 | ### ifupdown netlink bug workaround ###
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| 54 | # suppress "ip: RTNETLINK answers: File exists" message in the case of
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| 55 | # iface is down but an ip address is assigned
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| 56 | ip a|grep ${iface}$|grep -q inet && ip addr flush dev $iface >/dev/null 2>&1
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| 57 | ### end workaround ###
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| 58 | fi
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| 59 | return 1
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| 60 | }
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| 61 |
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| 62 | main_env_update() {
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| 63 | local t_mdent lastmatch=
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| 64 |
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| 65 | # get submode from calling hook script
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| 66 | SUBMODE=$(echo ${0%/*} |sed '{ s/\(.*\/\)*//; s/\.d$//}')
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| 67 |
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| 68 | # create env file
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| 69 | if ! [ -f "$ENVFILE" ]
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| 70 | then
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| 71 | [ -d ${ENVFILE%/*} ] || mkdir -p ${ENVFILE%/*}
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| 72 | echo "MDENT=0" >> $ENVFILE
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| 73 | echo "LASTLOG=0" >> $ENVFILE
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| 74 |
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| 75 | is_up && IFACE_STATE="up" || IFACE_STATE="down"
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| 76 | echo "IFACE_STATE=$IFACE_STATE" >> $ENVFILE
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| 77 |
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| 78 | if [ x"$IFACE" != x"lo" ]
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| 79 | then
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| 80 | # search for existing lib files end evaluate iface type by using the appropriate
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| 81 | # function from lib file
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| 82 | for lib in ${LIBDIR}/iftypes/*
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| 83 | do
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| 84 | [ -f $lib ] && (. $lib; iface_type 2>&-) || continue
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| 85 | if [ -n "$lastmatch" ]
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| 86 | then
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| 87 | if [ ${lib##*/} = ${lastmatch##*/} ]
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| 88 | then
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| 89 | mprint -s "Warning: $lib overlays $lastmatch"
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| 90 | else
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| 91 | mprint -s "Error: iface type $lib overlays $lastmatch"
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| 92 | fi
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| 93 | fi
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| 94 | lastmatch=$lib
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| 95 | done
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| 96 | fi
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| 97 |
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| 98 | # if iface type isn't evaluated type "iface" is default
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| 99 | [ -n "$lastmatch" ] && IFACE_TYPE=${lastmatch##*/} || IFACE_TYPE="iface"
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| 100 |
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| 101 | # update env
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| 102 | echo "IFACE_TYPE=${IFACE_TYPE}" >> $ENVFILE
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| 103 | fi
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| 104 |
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| 105 | . $ENVFILE
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| 106 | t_mdent=$MDENT
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| 107 |
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| 108 | # expand $IFUPDOWN_ENV
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| 109 | for var in $IFUPDOWN_ENV; do
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| 110 | eval $var
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| 111 | done
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| 112 |
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| 113 | [ $t_mdent -gt $MDENT ] && MDENT=$t_mdent
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| 114 | main_pos_update
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| 115 | }
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| 116 |
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| 117 | main_pos_update() {
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| 118 | [ x"$MDENT" = x"0" ] && STARTCOL= || STARTCOL="[$(expr ${MDENT:-0} \* ${TAB})C"
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| 119 | sed 's/MDENT=[0-9]*/'MDENT=$MDENT'/' -i $ENVFILE
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| 120 | }
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| 121 |
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| 122 | main_preup() {
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| 123 | config $RT_PREUP_PRINTING_OFF || mstart
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| 124 |
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| 125 | if ! config $RT_PREUP_IFUP_CHECK_OFF && is_up
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| 126 | then
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| 127 | if ! config $RT_PREUP_PRINTING_OFF
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| 128 | then
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| 129 | mup
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| 130 | mstate 1
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| 131 | minfo "Interface already up"
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| 132 | fi
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| 133 | exit 1
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| 134 | fi
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| 135 |
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| 136 | if_preup 2>&-
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| 137 | retval=$?
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| 138 |
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| 139 | [ x"$retval" != x"0" -a x"$retval" != x"127" ] && {
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| 140 | fail_preup 2>&- || exit 1
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| 141 | }
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| 142 |
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| 143 | config $RT_PREUP_PRINTING_OFF || [ "$METHOD" = "manual" ] && return
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| 144 | mup
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| 145 | }
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| 146 |
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| 147 | main_up() {
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| 148 | if ! config $RT_UP_IFUP_CHECK_OFF && [ "$METHOD" != "manual" ]
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| 149 | then
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| 150 | is_up
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| 151 | retval=$?
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| 152 | config $RT_UP_PRINTING_OFF || mstate $retval
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| 153 | [ x"$retval" != x"0" ] && exit 1
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| 154 | fi
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| 155 |
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| 156 | if_up 2>&-
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| 157 | retval=$?
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| 158 |
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| 159 | [ x"$retval" != x"0" -a x"$retval" != x"127" ] && {
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| 160 | fail_up 2>&- || exit 1
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| 161 | }
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| 162 |
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| 163 | if [ -d /tmp/ifupdown/pcode/${IFACE} ]
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| 164 | then
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| 165 | for dir in /tmp/ifupdown/pcode/${IFACE}/*
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| 166 | do
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| 167 | [ -f ${dir}/postup ] || continue
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| 168 | . ${dir}/postup
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| 169 | done
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| 170 | fi
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| 171 | }
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| 172 |
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| 173 | main_down() {
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| 174 | config $RT_DOWN_PRINTING_OFF || mstop
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| 175 |
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| 176 | if [ -d /tmp/ifupdown/pcode/${IFACE} ]
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| 177 | then
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| 178 | for dir in /tmp/ifupdown/pcode/${IFACE}/*
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| 179 | do
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| 180 | [ -f ${dir}/predown ] || continue
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| 181 | . ${dir}/predown
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| 182 | done
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| 183 | fi
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| 184 |
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| 185 | if_down 2>&-
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| 186 | retval=$?
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| 187 |
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| 188 | [ x"$retval" != x"0" -a x"$retval" != x"127" ] && {
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| 189 | fail_down 2>&- || exit 1
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| 190 | }
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| 191 |
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| 192 | config $RT_DOWN_PRINTING_OFF || [ "$METHOD" = "manual" ] && return
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| 193 | mdown
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| 194 | }
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| 195 |
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| 196 | main_postdown() {
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| 197 | if ! config $RT_POSTDOWN_IFDOWN_CHECK_OFF && [ "$METHOD" != "manual" ]
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| 198 | then
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| 199 | if [ $IFACE_STATE = "down" ]
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| 200 | then
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| 201 | if ! config $RT_POSTDOWN_PRINTING_OFF
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| 202 | then
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| 203 | mdown
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| 204 | mstate 1
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| 205 | minfo "Interface already down"
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| 206 | fi
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| 207 | else
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| 208 | is_up && retval=1 || retval=0
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| 209 | config $RT_POSTDOWN_PRINTING_OFF || mstate $retval
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| 210 | [ "$retval" != "0" ] && exit 1
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| 211 | fi
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| 212 | fi
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| 213 |
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| 214 | if_postdown 2>&-
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| 215 | retval=$?
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| 216 |
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| 217 | [ x"$retval" != x"0" -a x"$retval" != x"127" ] && {
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| 218 | fail_postdown 2>&- || exit 1
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| 219 | }
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| 220 |
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| 221 | # pcode cleanup
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| 222 | rm -rf /tmp/ifupdown/pcode/*/$IFACE 2>&- 1>&-
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| 223 | }
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| 224 |
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| 225 | main_exec_dirhooks() {
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| 226 | for hook in ${LIBDIR}/${1}/${2}
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| 227 | do
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| 228 | [ -f $hook ] || continue
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| 229 | . $hook
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| 230 | eval $3 2>&-
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| 231 | retval=$?
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| 232 | [ x"$retval" != x"0" -a x"$retval" != x"127" ] && exit 1
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| 233 | return
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| 234 | done
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| 235 | }
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| 236 |
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| 237 | main_exec_plugins() {
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| 238 | for plugin in ${LIBDIR}/plugins/*; do
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| 239 | [ -f $plugin ] || continue
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| 240 | . $plugin
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| 241 | eval "${plugin##*/}_${1}" 2>&-
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| 242 | retval=$?
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| 243 | [ x"$retval" != x"0" -a x"$retval" != x"127" ] && exit 1
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| 244 | done
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| 245 | }
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| 246 |
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| 247 | main_exec_inlinehooks() {
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| 248 | case $SUBMODE in
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| 249 | if-pre-up)
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| 250 | [ -n "$IF_PRE_UP" ] && eval $IF_PRE_UP
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| 251 | ;;
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| 252 | if-up)
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| 253 | [ -n "$IF_UP" ] && eval $IF_UP
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| 254 | ;;
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| 255 | if-down)
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| 256 | [ -n "$IF_DOWN" ] && eval $IF_DOWN
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| 257 | ;;
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| 258 | if-post-down)
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| 259 | [ -n "$IF_POST_DOWN" ] && eval $IF_POST_DOWN
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| 260 | ;;
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| 261 | esac
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| 262 | }
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| 263 |
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| 264 | ### main entry point ###
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| 265 |
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| 266 | FWIFUPDOWN_PRINTING_OFF=0
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| 267 | FWIFUPDOWN_SYSLOG_OFF=0
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| 268 | FWIFUPDOWN_FANCY=0
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| 269 | FWIFUPDOWN_DEBUG=0
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| 270 |
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| 271 | . /etc/rc.conf
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| 272 |
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| 273 | config $FWIFUPDOWN_DEBUG && set -x
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| 274 |
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| 275 | RT_PREUP_PRINTING_OFF=0
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| 276 | RT_UP_PRINTING_OFF=0
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| 277 | RT_DOWN_PRINTING_OFF=0
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| 278 | RT_POSTDOWN_PRINTING_OFF=0
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| 279 | RT_PREUP_IFUP_CHECK_OFF=0
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| 280 | RT_UP_IFUP_CHECK_OFF=0
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| 281 | RT_POSTDOWN_IFDOWN_CHECK_OFF=0
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| 282 | RT_BB_NOEXEC=0
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| 283 | RT_ERR=0
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| 284 | readonly ENVFILE="/tmp/ifupdown/env"
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| 285 | readonly LIBDIR="/etc/network"
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| 286 | IFACE_TYPE="none"
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| 287 |
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| 288 | alias exit="__exit"
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| 289 | alias ifup="__ifupdown ifup"
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| 290 | alias ifdown="__ifupdown ifdown"
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| 291 | [ -z "$KSH_VERSION" ] || alias which='whence -p'
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| 292 |
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| 293 | if ! [ -f /etc/network/mfunctions.sh ]
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| 294 | then
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| 295 | logger -t ifupdown "/etc/network/mfunctions.sh not found"
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| 296 | exit 1
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| 297 | fi
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| 298 | . /etc/network/mfunctions.sh
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| 299 |
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| 300 | main_env_update
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| 301 |
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| 302 | config $RT_ERR && built_in exit 1
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| 303 |
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| 304 | if [ x"$IFACE_TYPE" != x"iface" ]
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| 305 | then
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| 306 | if [ -f "${LIBDIR}/iftypes/${IFACE_TYPE}" ]
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| 307 | then
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| 308 | . ${LIBDIR}/iftypes/$IFACE_TYPE
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| 309 | else
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| 310 | mprint -s "Error: libfile $IFACE_TYPE not found"
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| 311 | fi
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| 312 | fi
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| 313 |
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| 314 | case $SUBMODE in
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| 315 | if-pre-up)
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| 316 | main_preup
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| 317 | main_exec_dirhooks methods $METHOD method_preup
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| 318 | main_exec_plugins preup
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| 319 |
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| 320 | # bypass execution of further busybox ifupdown.c code
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| 321 | config $RT_BB_NOEXEC && built_in exit 1
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| 322 | ;;
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| 323 | if-up)
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| 324 | main_exec_plugins up
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| 325 | main_exec_dirhooks methods $METHOD method_up
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| 326 | main_up
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| 327 | ;;
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| 328 | if-down)
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| 329 | main_down
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| 330 | main_exec_dirhooks methods $METHOD method_down
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| 331 | main_exec_plugins down
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| 332 |
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| 333 | # bypass execution of further busybox ifupdown.c code
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| 334 | config $RT_BB_NOEXEC && built_in exit 1
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| 335 | ;;
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| 336 | if-post-down)
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| 337 | main_exec_plugins postdown
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| 338 | main_exec_dirhooks methods $METHOD method_postdown
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| 339 | main_postdown
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| 340 | ;;
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| 341 | esac
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| 342 |
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| 343 | exit 0
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| 344 |
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| 345 | # vim:ts=4
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