| 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 | [ "$1" != "0" ] && echo "H_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 $iface >/dev/null 2>&1
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| 57 | ### end workaround ###
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| 58 | fi
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| 59 | return 1
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| 60 | }
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| 61 |
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| 62 | main_env_update() {
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| 63 | local t_mdent lastmatch=""
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| 64 |
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| 65 | # get submode from calling hook script
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| 66 | SUBMODE=$(dirname $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 $(dirname $ENVFILE) ] || mkdir -p $(dirname $ENVFILE)
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| 72 | echo "MDENT=0" >> $ENVFILE
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| 73 | echo "LASTLOG=0" >> $ENVFILE
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| 74 |
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| 75 | if is_up
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| 76 | then
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| 77 | IFACE_STATE="up"
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| 78 | else
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| 79 | IFACE_STATE="down"
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| 80 | fi
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| 81 | echo "IFACE_STATE=$IFACE_STATE" >> $ENVFILE
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| 82 |
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| 83 | if [ "$IFACE" != "lo" ]
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| 84 | then
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| 85 | # search for existing lib files end evaluate iface type by using the appropriate
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| 86 | # function from lib file
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| 87 | for lib in ${LIBDIR}/iftypes/* ${LIBDIR_OVERLAY}/iftypes/*
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| 88 | do
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| 89 | if [ -f $lib ]
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| 90 | then
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| 91 | if (. $lib; iface_type 2>&-)
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| 92 | then
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| 93 | if [ "$lastmatch" != "" ]
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| 94 | then
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| 95 | if [ "$(basename $lib)" = "$(basename $lastmatch)" ]
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| 96 | then
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| 97 | mprint -s "Warning: $lib overlays $lastmatch"
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| 98 | else
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| 99 | mprint -s "Error: iface type $lib overlays $lastmatch"
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| 100 | fi
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| 101 | fi
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| 102 | lastmatch=$lib
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| 103 | fi
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| 104 | fi
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| 105 | done
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| 106 | fi
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| 107 |
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| 108 | if [ "$lastmatch" != "" ]
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| 109 | then
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| 110 | IFACE_TYPE=$(basename $lastmatch)
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| 111 | else
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| 112 | # if iface type isn't evaluated type "iface" is default
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| 113 | IFACE_TYPE="iface"
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| 114 | fi
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| 115 |
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| 116 | # update env
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| 117 | echo "IFACE_TYPE=${IFACE_TYPE}" >> $ENVFILE
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| 118 | fi
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| 119 |
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| 120 | . $ENVFILE
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| 121 | t_mdent=$MDENT
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| 122 |
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| 123 | # expand $IFUPDOWN_ENV
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| 124 | for var in $IFUPDOWN_ENV; do
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| 125 | eval $var
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| 126 | done
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| 127 |
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| 128 | [ $t_mdent -gt $MDENT ] && MDENT=$t_mdent
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| 129 | main_pos_update
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| 130 | }
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| 131 |
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| 132 | main_pos_update() {
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| 133 | if [ "${MDENT:-0}" = "0" ]
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| 134 | then
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| 135 | STARTCOL=""
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| 136 | else
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| 137 | STARTCOL="[$(expr ${MDENT:-0} \* ${TAB})C"
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| 138 | fi
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| 139 | sed 's/MDENT=[0-9]*/'MDENT=$MDENT'/' -i $ENVFILE
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| 140 | }
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| 141 |
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| 142 | main_preup() {
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| 143 | config $RT_PREUP_PRINTING_OFF || mstart
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| 144 |
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| 145 | if ! config $RT_PREUP_IFUP_CHECK_OFF && is_up
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| 146 | then
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| 147 | if ! config $RT_PREUP_PRINTING_OFF
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| 148 | then
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| 149 | mup
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| 150 | mstate 1
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| 151 | minfo "Interface already up"
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| 152 | fi
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| 153 | exit 1
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| 154 | fi
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| 155 |
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| 156 | if_preup 2>&-
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| 157 | retval=$?
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| 158 |
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| 159 | if [ $retval != 0 ]
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| 160 | then
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| 161 | if [ $retval != 127 ]
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| 162 | then
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| 163 | fail_preup 2>&- || exit 1
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| 164 | fi
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| 165 | fi
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| 166 |
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| 167 | config $RT_PREUP_PRINTING_OFF || mup
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| 168 | }
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| 169 |
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| 170 | main_up() {
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| 171 | if ! config $RT_UP_IFUP_CHECK_OFF
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| 172 | then
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| 173 | is_up
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| 174 | retval=$?
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| 175 |
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| 176 | if [ $retval != 0 ]
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| 177 | then
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| 178 |
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| 179 | if ! config $RT_UP_PRINTING_OFF
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| 180 | then
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| 181 | mstate $retval
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| 182 | [ "$METHOD" = "manual" ] && minfo "Method manual is set"
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| 183 | fi
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| 184 | exit 1
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| 185 | else
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| 186 | config $RT_UP_PRINTING_OFF || mstate $retval
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| 187 | fi
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| 188 | fi
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| 189 |
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| 190 | if_up 2>&-
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| 191 | retval=$?
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| 192 |
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| 193 | if [ $retval != 0 ]
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| 194 | then
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| 195 | if [ $retval != 127 ]
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| 196 | then
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| 197 | fail_up 2>&- || exit 1
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| 198 | fi
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| 199 | fi
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| 200 |
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| 201 | if [ -d /tmp/ifupdown/pcode/${IFACE} ]
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| 202 | then
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| 203 | for dir in /tmp/ifupdown/pcode/${IFACE}/*
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| 204 | do
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| 205 | if [ -f ${dir}/postup ]
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| 206 | then
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| 207 | . ${dir}/postup
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| 208 | fi
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| 209 | done
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| 210 | fi
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| 211 | }
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| 212 |
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| 213 | main_down() {
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| 214 | config $RT_DOWN_PRINTING_OFF || mstop
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| 215 |
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| 216 | if [ -d /tmp/ifupdown/pcode/${IFACE} ]
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| 217 | then
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| 218 | for dir in /tmp/ifupdown/pcode/${IFACE}/*
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| 219 | do
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| 220 | if [ -f ${dir}/predown ]
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| 221 | then
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| 222 | . ${dir}/predown
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| 223 | fi
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| 224 | done
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| 225 | fi
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| 226 |
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| 227 | if_down 2>&-
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| 228 | retval=$?
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| 229 |
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| 230 | if [ $retval != 0 ]
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| 231 | then
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| 232 | if [ $retval != 127 ]
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| 233 | then
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| 234 | fail_down 2>&- || exit 1
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| 235 | fi
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| 236 | fi
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| 237 |
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| 238 | config $RT_DOWN_PRINTING_OFF || mdown
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| 239 | }
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| 240 |
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| 241 | main_postdown() {
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| 242 | if ! config $RT_POSTDOWN_IFDOWN_CHECK_OFF
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| 243 | then
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| 244 | if [ $IFACE_STATE = "down" ]
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| 245 | then
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| 246 | if ! config $RT_POSTDOWN_PRINTING_OFF
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| 247 | then
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| 248 | mdown
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| 249 | mstate 1
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| 250 | minfo "Interface already down"
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| 251 | fi
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| 252 | else
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| 253 | if is_up
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| 254 | then
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| 255 | if ! config $RT_POSTDOWN_PRINTING_OFF
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| 256 | then
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| 257 | mstate 1
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| 258 | [ "$METHOD" = "manual" ] && minfo "Method manual is set"
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| 259 | fi
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| 260 | return 1
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| 261 | else
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| 262 | config $RT_POSTDOWN_PRINTING_OFF || mstate 0
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| 263 | fi
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| 264 | fi
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| 265 | fi
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| 266 |
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| 267 | if_postdown 2>&-
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| 268 | retval=$?
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| 269 |
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| 270 | if [ $retval != 0 ]
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| 271 | then
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| 272 | if [ $retval != 127 ]
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| 273 | then
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| 274 | fail_postdown 2>&- || exit 1
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| 275 | fi
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| 276 | fi
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| 277 |
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| 278 | # pcode cleanup
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| 279 | rm -rf /tmp/ifupdown/pcode/*/$IFACE 2>&- 1>&-
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| 280 | }
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| 281 |
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| 282 | main_exec_dirhooks() {
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| 283 | for hook in ${LIBDIR_OVERLAY}/${1}/${2} ${LIBDIR}/${1}/${2}
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| 284 | do
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| 285 | if [ -f $hook ]
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| 286 | then
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| 287 | . $hook
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| 288 | eval $3 2>&-
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| 289 | retval=$?
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| 290 | [ $retval != 0 -a $retval != 127 ] && exit 1
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| 291 | return
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| 292 | fi
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| 293 | done
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| 294 | }
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| 295 |
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| 296 | main_exec_plugins() {
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| 297 | for plugin in ${LIBDIR_OVERLAY}/plugins/* ${LIBDIR}/plugins/*; do
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| 298 | [ -f $plugin ] || continue
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| 299 | . $plugin
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| 300 | eval "${plugin##*/}_${1}" 2>&-
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| 301 | retval=$?
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| 302 | [ $retval != 0 -a $retval != 127 ] && exit 1
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| 303 | done
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| 304 | }
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| 305 |
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| 306 | main_exec_inlinehooks() {
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| 307 | case $SUBMODE in
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| 308 | if-pre-up)
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| 309 | [ "${IF_PRE_UP:-""}" != "" ] && eval $IF_PRE_UP
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| 310 | ;;
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| 311 | if-up)
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| 312 | [ "${IF_UP:-""}" != "" ] && eval $IF_UP
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| 313 | ;;
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| 314 | if-down)
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| 315 | [ "${IF_DOWN:-""}" != "" ] && eval $IF_DOWN
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| 316 | ;;
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| 317 | if-post-down)
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| 318 | [ "${IF_POST_DOWN:-""}" != "" ] && eval $IF_POST_DOWN
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| 319 | ;;
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| 320 | esac
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| 321 | }
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| 322 |
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| 323 | ### main entry point ###
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| 324 |
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| 325 | CFG_PRINTING_OFF=0
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| 326 | CFG_SYSLOG_OFF=0
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| 327 | CFG_FANCY=0
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| 328 | CFG_DEBUG=0
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| 329 |
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| 330 | if ! [ -f /etc/conf.d/ifupdown ]
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| 331 | then
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| 332 | logger -t ifupdown "/etc/conf.d/ifupdown not found"
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| 333 | exit 1
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| 334 | fi
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| 335 | . /etc/conf.d/ifupdown
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| 336 |
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| 337 | config ${CFG_DEBUG:=""} && set -x
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| 338 |
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| 339 | RT_PREUP_PRINTING_OFF=0
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| 340 | RT_UP_PRINTING_OFF=0
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| 341 | RT_DOWN_PRINTING_OFF=0
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| 342 | RT_POSTDOWN_PRINTING_OFF=0
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| 343 | RT_PREUP_IFUP_CHECK_OFF=0
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| 344 | RT_UP_IFUP_CHECK_OFF=0
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| 345 | RT_POSTDOWN_IFDOWN_CHECK_OFF=0
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| 346 | RT_BB_NOEXEC=0
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| 347 | readonly ENVFILE="/tmp/ifupdown/env"
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| 348 | readonly LIBDIR="/lib/network"
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| 349 | readonly LIBDIR_OVERLAY="/etc/network/lib"
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| 350 | IFACE_TYPE="none"
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| 351 | H_ERR=0
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| 352 |
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| 353 | alias exit="__exit"
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| 354 | alias ifup="__ifupdown ifup"
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| 355 | alias ifdown="__ifupdown ifdown"
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| 356 | [ -z "${KSH_VERSION:-""}" ] || alias which='whence -p'
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| 357 |
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| 358 | if ! [ -f ${LIBDIR}/sh/mfunctions.sh ]
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| 359 | then
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| 360 | logger -t ifupdown "${LIBDIR}/sh/mfunctions.sh not found"
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| 361 | exit 1
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| 362 | fi
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| 363 | . ${LIBDIR}/sh/mfunctions.sh
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| 364 |
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| 365 | main_env_update
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| 366 |
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| 367 | config $H_ERR && built_in exit 1
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| 368 |
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| 369 | if [ "$IFACE_TYPE" != "iface" ]
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| 370 | then
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| 371 | if [ -f "${LIBDIR_OVERLAY}/iftypes/${IFACE_TYPE}" ]
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| 372 | then
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| 373 | . ${LIBDIR_OVERLAY}/iftypes/${IFACE_TYPE}
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| 374 | elif [ -f "${LIBDIR}/iftypes/${IFACE_TYPE}" ]
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| 375 | then
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| 376 | . ${LIBDIR}/iftypes/$IFACE_TYPE
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| 377 | else
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| 378 | mprint -s "Error: libfile $IFACE_TYPE not found"
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| 379 | fi
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| 380 | fi
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| 381 |
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| 382 | case $SUBMODE in
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| 383 | if-pre-up)
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| 384 | main_preup
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| 385 | main_exec_dirhooks methods $METHOD method_preup
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| 386 | main_exec_plugins preup
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| 387 |
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| 388 | # bypass execution of further busybox ifupdown.c code
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| 389 | config $RT_BB_NOEXEC && built_in exit 1
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| 390 | ;;
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| 391 | if-up)
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| 392 | main_exec_plugins up
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| 393 | main_exec_dirhooks methods $METHOD method_up
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| 394 | main_up
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| 395 | ;;
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| 396 | if-down)
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| 397 | main_down
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| 398 | main_exec_dirhooks methods $METHOD method_down
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| 399 | main_exec_plugins down
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| 400 |
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| 401 | # bypass execution of further busybox ifupdown.c code
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| 402 | config $RT_BB_NOEXEC && built_in exit 1
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| 403 | ;;
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| 404 | if-post-down)
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| 405 | main_exec_plugins postdown
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| 406 | main_exec_dirhooks methods $METHOD method_postdown
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| 407 | main_postdown
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| 408 | ;;
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| 409 | esac
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| 410 |
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| 411 | exit 0
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| 412 |
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| 413 | # vim:ts=4
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