| 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 | set -u
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| 11 |
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| 12 | builtin() {
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| 13 | local builtin=$1
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| 14 | local alias=$(alias $builtin)
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| 15 | unalias $builtin
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| 16 | alias $(echo $alias|sed 's/'\''//g')
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| 17 | shift
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| 18 | $builtin $@
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| 19 | }
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| 20 |
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| 21 | config() {
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| 22 | [ "$1" != "0" ]
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| 23 | }
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| 24 | __ifupdown() {
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| 25 | local environ=$(cat $ENVFILE)
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| 26 |
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| 27 | IFUPDOWN_ENV=$(echo -n $IFUPDOWN_ENV|sed 's/\(MDENT=\)[^ ]*[[:space:]]*//g';\
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| 28 | echo " PARENT_IFACE_TYPE=$IFACE_TYPE"; \
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| 29 | echo " PARENT_IFACE=$IFACE"; \
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| 30 | echo " MDENT=$MDENT") \
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| 31 | busybox $@
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| 32 |
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| 33 | retval=$?
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| 34 | echo $environ > $ENVFILE
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| 35 | return $retval
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| 36 | }
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| 37 |
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| 38 | __exit() {
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| 39 | [ "$1" != "0" ] && echo "H_ERR=1" >> $ENVFILE
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| 40 | exit $1
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| 41 | }
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| 42 |
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| 43 | iface_exists() {
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| 44 | grep -q "${1:-$IFACE}:" /proc/net/dev
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| 45 | }
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| 46 |
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| 47 | is_up() {
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| 48 | local iface=${1:-$IFACE}
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| 49 |
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| 50 | if iface_exists $iface
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| 51 | then
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| 52 | ip a|grep ${iface}:[[:space:]]|grep -q UP && return
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| 53 |
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| 54 | ### ifupdown netlink bug workaround ###
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| 55 | # suppress "ip: RTNETLINK answers: File exists" message in the case of
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| 56 | # iface is down but an ip address is assigned
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| 57 | ip a|grep ${iface}$|grep -q inet && ip addr flush dev $iface >/dev/null 2>&1
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| 58 | ### end workaround ###
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| 59 | fi
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| 60 | return 1
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| 61 | }
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| 62 |
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| 63 | main_env_update() {
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| 64 | local t_mdent lastmatch=""
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| 65 |
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| 66 | # get submode from calling hook script
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| 67 | SUBMODE=$(dirname $0|sed '{ s/\(.*\/\)*//; s/\.d$//}')
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| 68 |
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| 69 | # create env file
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| 70 | if ! [ -f "$ENVFILE" ]
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| 71 | then
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| 72 | [ -d $(dirname $ENVFILE) ] || mkdir -p $(dirname $ENVFILE)
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| 73 | echo "MDENT=0" >> $ENVFILE
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| 74 | echo "LASTLOG=0" >> $ENVFILE
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| 75 |
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| 76 | if is_up
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| 77 | then
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| 78 | IFACE_STATE="up"
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| 79 | else
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| 80 | IFACE_STATE="down"
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| 81 | fi
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| 82 | echo "IFACE_STATE=$IFACE_STATE" >> $ENVFILE
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| 83 |
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| 84 | if [ "$IFACE" != "lo" ]
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| 85 | then
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| 86 | # search for existing lib files end evaluate iface type by using the appropriate
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| 87 | # function from lib file
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| 88 | for lib in ${LIBDIR}/* ${LIBDIR_OVERLAY}/*
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| 89 | do
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| 90 | if [ -f $lib ]
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| 91 | then
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| 92 | if (. $lib; iface_type 2>&-)
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| 93 | then
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| 94 | if [ "$lastmatch" != "" ]
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| 95 | then
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| 96 | if [ "$(basename $lib)" = "$(basename $lastmatch)" ]
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| 97 | then
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| 98 | mprint -s "Warning: $lib overlays $lastmatch"
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| 99 | else
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| 100 | mprint -s "Error: iface type $lib overlays $lastmatch"
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| 101 | fi
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| 102 | fi
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| 103 | lastmatch=$lib
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| 104 | fi
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| 105 | fi
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| 106 | done
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| 107 | fi
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| 108 |
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| 109 | if [ "$lastmatch" != "" ]
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| 110 | then
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| 111 | IFACE_TYPE=$(basename $lastmatch)
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| 112 | else
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| 113 | # if iface type isn't evaluated type "iface" is default
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| 114 | IFACE_TYPE="iface"
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| 115 | fi
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| 116 |
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| 117 | # update env
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| 118 | echo "IFACE_TYPE=${IFACE_TYPE}" >> $ENVFILE
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| 119 | fi
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| 120 |
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| 121 | . $ENVFILE
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| 122 | t_mdent=$MDENT
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| 123 |
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| 124 | # expand $IFUPDOWN_ENV
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| 125 | for var in $IFUPDOWN_ENV; do
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| 126 | eval $var
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| 127 | done
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| 128 |
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| 129 | [ $t_mdent -gt $MDENT ] && MDENT=$t_mdent
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| 130 | main_pos_update
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| 131 | }
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| 132 |
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| 133 | main_pos_update() {
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| 134 | if [ "${MDENT:-0}" = "0" ]
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| 135 | then
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| 136 | STARTCOL=""
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| 137 | else
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| 138 | STARTCOL="\x1B[$(expr ${MDENT:-0} \* ${TAB})C"
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| 139 | fi
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| 140 | sed 's/MDENT=[0-9]*/'MDENT=$MDENT'/' -i $ENVFILE
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| 141 | }
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| 142 |
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| 143 | main_preup() {
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| 144 | config $RT_PREUP_PRINTING_OFF || mstart
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| 145 |
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| 146 | if ! config $RT_PREUP_IFUP_CHECK_OFF && is_up
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| 147 | then
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| 148 | if ! config $RT_PREUP_PRINTING_OFF
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| 149 | then
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| 150 | mup
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| 151 | mstate 1
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| 152 | minfo "Interface already up"
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| 153 | fi
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| 154 | exit 1
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| 155 | fi
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| 156 |
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| 157 | if_preup 2>&-
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| 158 | retval=$?
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| 159 |
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| 160 | if [ $retval != 0 ]
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| 161 | then
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| 162 | if [ $retval != 127 ]
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| 163 | then
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| 164 | fail_preup 2>&-
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| 165 | retval=$?
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| 166 |
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| 167 | [ $retval != 0 ] && [ $retval != 127 ] && exit 1
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| 168 | fi
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| 169 | fi
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| 170 |
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| 171 | config $RT_PREUP_PRINTING_OFF || mup
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| 172 | }
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| 173 |
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| 174 | main_up() {
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| 175 | if ! config $RT_UP_IFUP_CHECK_OFF
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| 176 | then
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| 177 | is_up
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| 178 | retval=$?
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| 179 |
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| 180 | if [ $retval != 0 ]
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| 181 | then
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| 182 |
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| 183 | if ! config $RT_UP_PRINTING_OFF
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| 184 | then
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| 185 | mstate $retval
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| 186 | [ "$METHOD" = "manual" ] && minfo "Method manual is set"
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| 187 | fi
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| 188 | exit 1
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| 189 | else
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| 190 | config $RT_UP_PRINTING_OFF || mstate $retval
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| 191 | fi
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| 192 | fi
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| 193 |
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| 194 | if_up 2>&-
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| 195 | retval=$?
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| 196 |
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| 197 | if [ $retval != 0 ]
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| 198 | then
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| 199 | if [ $retval != 127 ]
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| 200 | then
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| 201 | fail_up 2>&-
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| 202 | retval=$?
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| 203 |
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| 204 | [ $retval != 0 ] && [ $retval != "127" ] && exit 1
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| 205 | fi
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| 206 | fi
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| 207 |
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| 208 | if [ -d /tmp/ifupdown/pcode/${IFACE} ]
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| 209 | then
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| 210 | for dir in /tmp/ifupdown/pcode/${IFACE}/*
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| 211 | do
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| 212 | if [ -f ${dir}/postup ]
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| 213 | then
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| 214 | . ${dir}/postup
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| 215 | fi
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| 216 | done
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| 217 | fi
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| 218 | }
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| 219 |
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| 220 | main_down() {
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| 221 | config $RT_DOWN_PRINTING_OFF || mstop
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| 222 |
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| 223 | if [ -d /tmp/ifupdown/pcode/${IFACE} ]
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| 224 | then
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| 225 | for dir in /tmp/ifupdown/pcode/${IFACE}/*
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| 226 | do
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| 227 | if [ -f ${dir}/predown ]
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| 228 | then
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| 229 | . ${dir}/predown
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| 230 | fi
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| 231 | done
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| 232 | fi
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| 233 |
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| 234 | if_down 2>&-
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| 235 | retval=$?
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| 236 |
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| 237 | if [ $retval != 0 ]
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| 238 | then
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| 239 | if [ $retval != 127 ]
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| 240 | then
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| 241 | fail_down 2>&-
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| 242 | retval=$?
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| 243 |
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| 244 | [ $retval != 0 ] && [ $retval != "127" ] && exit 1
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| 245 | fi
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| 246 | fi
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| 247 |
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| 248 | config $RT_DOWN_PRINTING_OFF || mdown
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| 249 | }
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| 250 |
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| 251 | main_postdown() {
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| 252 | if ! config $RT_POSTDOWN_IFDOWN_CHECK_OFF
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| 253 | then
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| 254 | if [ $IFACE_STATE = "down" ]
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| 255 | then
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| 256 | if ! config $RT_POSTDOWN_PRINTING_OFF
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| 257 | then
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| 258 | mdown
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| 259 | mstate 1
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| 260 | minfo "Interface already down"
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| 261 | fi
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| 262 | else
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| 263 | if is_up
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| 264 | then
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| 265 | if ! config $RT_POSTDOWN_PRINTING_OFF
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| 266 | then
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| 267 | mstate 1
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| 268 | [ "$METHOD" = "manual" ] && minfo "Method manual is set"
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| 269 | fi
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| 270 | return 1
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| 271 | else
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| 272 | config $RT_POSTDOWN_PRINTING_OFF || mstate 0
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| 273 | fi
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| 274 | fi
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| 275 | fi
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| 276 |
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| 277 | if_postdown 2>&-
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| 278 | retval=$?
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| 279 |
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| 280 | if [ $retval != 0 ]
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| 281 | then
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| 282 | if [ $retval != 127 ]
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| 283 | then
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| 284 | fail_postdown 2>&-
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| 285 | retval=$?
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| 286 |
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| 287 | [ $retval != 0 ] && [ $retval != "127" ] && exit 1
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| 288 | fi
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| 289 | fi
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| 290 |
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| 291 | # pcode cleanup
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| 292 | rm -rf /tmp/ifupdown/pcode/*/$IFACE 2>&- 1>&-
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| 293 | }
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| 294 |
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| 295 | main_ifup() {
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| 296 | case $METHOD in
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| 297 | dhcp)
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| 298 | main_dhcp_up || exit 1
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| 299 |
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| 300 | # don't handle any failures, it's really not my problem if that goes wrong
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| 301 | main_exec_inlinehooks
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| 302 |
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| 303 | main_up || exit 1
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| 304 | RT_BB_NOEXEC=1
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| 305 | ;;
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| 306 | esac
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| 307 | }
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| 308 |
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| 309 | main_ifdown() {
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| 310 | case $METHOD in
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| 311 | dhcp)
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| 312 | main_dhcp_down
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| 313 |
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| 314 | # don't handle any failures, it's really not my problem if that goes wrong
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| 315 | main_exec_inlinehooks
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| 316 |
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| 317 | main_postdown || exit 1
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| 318 | RT_BB_NOEXEC=1
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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_exec_inlinehooks() {
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| 324 | case $SUBMODE in
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| 325 | if-pre-up)
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| 326 | [ "${IF_PRE_UP:-""}" != "" ] && eval $IF_PRE_UP
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| 327 | ;;
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| 328 | if-up)
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| 329 | [ "${IF_UP:-""}" != "" ] && eval $IF_UP
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| 330 | ;;
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| 331 | if-down)
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| 332 | [ "${IF_DOWN:-""}" != "" ] && eval $IF_DOWN
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| 333 | ;;
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| 334 | if-post-down)
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| 335 | [ "${IF_POST_DOWN:-""}" != "" ] && eval $IF_POST_DOWN
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| 336 | ;;
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| 337 | esac
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| 338 | }
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| 339 |
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| 340 | main_dhcp_up() {
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| 341 | local err
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| 342 |
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| 343 | if ! err=$(ip link set $IFACE up 2>&1 1>&-)
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| 344 | then
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| 345 | mprint -s "main_dhcp_up: $err"
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| 346 | return 1
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| 347 | fi
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| 348 |
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| 349 | if [ "${IF_DHCPCLIENT:-""}" != "" -a "${IF_DHCPCLIENT_OPTS:-""}" != "udhcpc" ]
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| 350 | then
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| 351 | if [ -x "$(which $IF_DHCPCLIENT)" ]
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| 352 | then
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| 353 | err=$(eval $IF_DHCPCLIENT ${IF_DHCPCLIENT_OPTS:-""} 2>&1 1>&-) || mprint -s "main_dhcp_up: $err" &
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| 354 | return 0
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| 355 | fi
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| 356 | mprint -s "$IF_DHCPCCLIENT not found, using builtin udhcpcd"
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| 357 | fi
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| 358 |
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| 359 | if ! err=$(udhcpc -b -t 0 -p /var/run/udhcpc.${IFACE}.pid -i $IFACE ${IF_HOSTNAME:+"-H $IF_HOSTNAME"} ${IF_CLIENTID:+"-c $IF_CLIENTID"} \
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| 360 | ${IF_SCRIPT:+"-s $IF_SCRIPT"} 2>&1 1>&-)
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| 361 | then
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| 362 | mprint -s "main_dhcp_up: $err"
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| 363 | return 1
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| 364 | fi
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| 365 |
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| 366 | return 0
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| 367 | }
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| 368 |
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| 369 | main_dhcp_down() {
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| 370 | local err
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| 371 |
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| 372 | if [ -f /var/run/udhcpc.${IFACE}.pid ]
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| 373 | then
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| 374 | err=$(kill -TERM "$(cat /var/run/udhcpc.${IFACE}.pid)" 2>&1 1>&-) || mprint -s "main_dhcp_down: $err"
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| 375 | fi
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| 376 |
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| 377 | if is_up
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| 378 | then
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| 379 | err=$(ip addr flush dev $IFACE 2>&1 1>&-) || mprint -s "main_dhcp_down: $err"
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| 380 | err=$(ip link set $IFACE down 2>&1 1>&-) || mprint -s "main_dhcp_down: $err"
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| 381 | fi
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| 382 | }
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| 383 |
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| 384 | ### main entry point ###
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| 385 |
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| 386 | CFG_PRINTING_OFF=0
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| 387 | CFG_SYSLOG_OFF=0
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| 388 | CFG_BUSYBOX_COMPAT=0
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| 389 |
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| 390 | if ! [ -f /etc/conf.d/ifupdown ]
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| 391 | then
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| 392 | logger -t ifupdown "/etc/conf.d/ifupdown not found"
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| 393 | exit 1
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| 394 | fi
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| 395 | . /etc/conf.d/ifupdown
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| 396 |
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| 397 | RT_PREUP_PRINTING_OFF=0
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| 398 | RT_UP_PRINTING_OFF=0
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| 399 | RT_DOWN_PRINTING_OFF=0
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| 400 | RT_POSTDOWN_PRINTING_OFF=0
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| 401 | RT_PREUP_IFUP_CHECK_OFF=0
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| 402 | RT_UP_IFUP_CHECK_OFF=0
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| 403 | RT_POSTDOWN_IFDOWN_CHECK_OFF=0
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| 404 | RT_BB_NOEXEC=0
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| 405 | readonly ENVFILE="/tmp/ifupdown/env"
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| 406 | readonly LIBDIR="/opt/ifupdown/lib"
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| 407 | readonly LIBDIR_OVERLAY="/etc/network/lib"
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| 408 | IFACE_TYPE="none"
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| 409 | H_ERR=0
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| 410 |
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| 411 | alias exit="__exit"
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| 412 | alias ifup="__ifupdown ifup"
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| 413 | alias ifdown="__ifupdown ifdown"
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| 414 |
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| 415 | if ! [ -f /opt/ifupdown/bin/mfunctions.sh ]
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| 416 | then
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| 417 | logger -t ifupdown "/opt/ifupdown/bin/mfunctions.sh not found"
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| 418 | exit 1
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| 419 | fi
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| 420 | . /opt/ifupdown/bin/mfunctions.sh
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| 421 |
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| 422 | main_env_update
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| 423 |
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| 424 | config $H_ERR && builtin exit 1
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| 425 |
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| 426 | if [ "$IFACE_TYPE" != "iface" ]
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| 427 | then
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| 428 | if [ -f "${LIBDIR_OVERLAY}/$IFACE_TYPE" ]
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| 429 | then
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| 430 | . ${LIBDIR_OVERLAY}/$IFACE_TYPE
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| 431 | elif [ -f "${LIBDIR}/$IFACE_TYPE" ]
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| 432 | then
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| 433 | . ${LIBDIR}/$IFACE_TYPE
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| 434 | else
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| 435 | mprint -s "Error: libfile not found"
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| 436 | fi
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| 437 | fi
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| 438 |
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| 439 | case $SUBMODE in
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| 440 | if-pre-up)
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| 441 | main_preup
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| 442 | main_ifup
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| 443 | # bypass execution of further busybox ifupdown.c code
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| 444 | config $RT_BB_NOEXEC && builtin exit 1
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| 445 | ;;
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| 446 | if-up)
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| 447 | main_up
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| 448 | ;;
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| 449 | if-down)
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| 450 | main_down
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| 451 | main_ifdown
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| 452 | # bypass execution of further busybox ifupdown.c code
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| 453 | config $RT_BB_NOEXEC && builtin exit 1
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| 454 | ;;
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| 455 | if-post-down)
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| 456 | main_postdown
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| 457 | ;;
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| 458 | esac
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| 459 |
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| 460 | exit 0
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| 461 |
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| 462 | # vim:ts=4
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