testing/hosts/dave/etc/runlevels/default/net.eth0

   1 #!/sbin/runscript
   2 # Copyright 1999-2004 Gentoo Technologies, Inc.
   3 # Distributed under the terms of the GNU General Public License v2
   4
   5 #NB: Config is in /etc/conf.d/net
   6
   7 if [[ -n $NET_DEBUG ]]; then
   8         set -x
   9         devnull=/dev/stderr
  10 else
  11         devnull=/dev/null
  12 fi
  13
  14 # For pcmcia users. note that pcmcia must be added to the same
  15 # runlevel as the net.* script that needs it.
  16 depend() {
  17         use hotplug pcmcia
  18 }
  19
  20 checkconfig() {
  21         if [[ -z "${ifconfig_IFACE}" ]]; then
  22                 eerror "Please make sure that /etc/conf.d/net has \$ifconfig_$IFACE set"
  23                 eerror "(or \$iface_$IFACE for old-style configuration)"
  24                 return 1
  25         fi
  26         if [[ -n "${vlans_IFACE}" && ! -x /sbin/vconfig ]]; then
  27                 eerror "For VLAN (802.1q) support, emerge net-misc/vconfig"
  28                 return 1
  29         fi
  30 }
  31
  32 # Fix bug 50039 (init.d/net.eth0 localization)
  33 # Some other commands in this script might need to be wrapped, but
  34 # we'll get them one-by-one.  Note that LC_ALL trumps LC_anything_else
  35 # according to locale(7)
  36 ifconfig() {
  37         LC_ALL=C /sbin/ifconfig "$@"
  38 }
  39
  40 # setup_vars: setup variables based on $1 and content of /etc/conf.d/net
  41 # The following variables are set, which should be declared local by
  42 # the calling routine.
  43 #       status_IFACE                    (up or '')
  44 #       vlans_IFACE                             (space-separated list)
  45 #       ifconfig_IFACE                  (array of ifconfig lines, replaces iface_IFACE)
  46 #       dhcpcd_IFACE                    (command-line args for dhcpcd)
  47 #       routes_IFACE                    (array of route lines)
  48 #       inet6_IFACE                             (array of inet6 lines)
  49 #       ifconfig_fallback_IFACE (fallback ifconfig if dhcp fails)
  50 setup_vars() {
  51         local i iface="${1//\./_}"
  52
  53         status_IFACE="$(ifconfig ${1} 2>${devnull} | gawk '$1 == "UP" {print "up"}')"
  54         eval vlans_IFACE=\"\$\{iface_${iface}_vlans\}\"
  55         eval ifconfig_IFACE=( \"\$\{ifconfig_$iface\[@\]\}\" )
  56         eval dhcpcd_IFACE=\"\$\{dhcpcd_$iface\}\"
  57         eval routes_IFACE=( \"\$\{routes_$iface\[@\]\}\" )
  58         eval inet6_IFACE=( \"\$\{inet6_$iface\[@\]\}\" )
  59         eval ifconfig_fallback_IFACE=( \"\$\{ifconfig_fallback_$iface\[@\]\}\" )
  60
  61         # BACKWARD COMPATIBILITY: populate the ifconfig_IFACE array
  62         # if iface_IFACE is set (fex. iface_eth0 instead of ifconfig_eth0)
  63         eval local iface_IFACE=\"\$\{iface_$iface\}\"
  64         if [[ -n ${iface_IFACE} && -z ${ifconfig_IFACE} ]]; then
  65                 # Make sure these get evaluated as arrays
  66                 local -a aliases broadcasts netmasks
  67
  68                 # Start with the primary interface
  69                 ifconfig_IFACE=( "${iface_IFACE}" )
  70
  71                 # ..then add aliases
  72                 eval aliases=( \$\{alias_$iface\} )
  73                 eval broadcasts=( \$\{broadcast_$iface\} )
  74                 eval netmasks=( \$\{netmask_$iface\} )
  75                 for ((i = 0; i < ${#aliases[@]}; i = i + 1)); do
  76                         ifconfig_IFACE[i+1]="${aliases[i]} ${broadcasts[i]:+broadcast ${broadcasts[i]}} ${netmasks[i]:+netmask ${netmasks[i]}}"
  77                 done
  78         fi
  79
  80         # BACKWARD COMPATIBILITY: check for space-separated inet6 addresses
  81         if [[ ${#inet6_IFACE[@]} == 1 && ${inet6_IFACE} == *' '* ]]; then
  82                 inet6_IFACE=( ${inet6_IFACE} )
  83         fi
  84 }
  85
  86 iface_start() {
  87         local IFACE=${1} i x retval
  88         checkconfig || return 1
  89
  90         if [[ ${ifconfig_IFACE} != dhcp ]]; then
  91                 # Show the address, but catch if this interface will be inet6 only
  92                 i=${ifconfig_IFACE%% *}
  93                 if [[ ${i} == *.*.*.* ]]; then
  94                         ebegin "Bringing ${IFACE} up (${i})"
  95                 else
  96                         ebegin "Bringing ${IFACE} up"
  97                 fi
  98                 # ifconfig does not always return failure ..
  99                 ifconfig ${IFACE} ${ifconfig_IFACE} >${devnull} && \
 100                 ifconfig ${IFACE} up &>${devnull}
 101                 eend $? || return $?
 102         else
 103                 # Check that eth0 was not brought up by the kernel ...
 104                 if [[ ${status_IFACE} == up ]]; then
 105                         einfo "Keeping kernel configuration for ${IFACE}"
 106                 else
 107                         ebegin "Bringing ${IFACE} up via DHCP"
 108                         /sbin/dhcpcd ${dhcpcd_IFACE} ${IFACE}
 109                         retval=$?
 110                         eend $retval
 111                         if [[ $retval == 0 ]]; then
 112                                 # DHCP succeeded, show address retrieved
 113                                 i=$(ifconfig ${IFACE} | grep -m1 -o 'inet addr:[^ ]*' |
 114                                         cut -d: -f2)
 115                                 [[ -n ${i} ]] && einfo "  ${IFACE} received address ${i}"
 116                         elif [[ -n "${ifconfig_fallback_IFACE}" ]]; then
 117                                 # DHCP failed, try fallback.
 118                                 # Show the address, but catch if this interface will be inet6 only
 119                                 i=${ifconfig_fallback_IFACE%% *}
 120                                 if [[ ${i} == *.*.*.* ]]; then
 121                                         ebegin "Using fallback configuration (${i}) for ${IFACE}"
 122                                 else
 123                                         ebegin "Using fallback configuration for ${IFACE}"
 124                                 fi
 125                                 ifconfig ${IFACE} ${ifconfig_fallback_IFACE} >${devnull} && \
 126                                 ifconfig ${IFACE} up &>${devnull}
 127                                 eend $? || return $?
 128                         else
 129                                 return $retval
 130                         fi
 131                 fi
 132         fi
 133
 134         if [[ ${#ifconfig_IFACE[@]} -gt 1 ]]; then
 135                 einfo "  Adding aliases"
 136                 for ((i = 1; i < ${#ifconfig_IFACE[@]}; i = i + 1)); do
 137                         ebegin "    ${IFACE}:${i} (${ifconfig_IFACE[i]%% *})"
 138                         ifconfig ${IFACE}:${i} ${ifconfig_IFACE[i]}
 139                         eend $?
 140                 done
 141         fi
 142
 143         if [[ -n ${inet6_IFACE} ]]; then
 144                 einfo "  Adding inet6 addresses"
 145                 for ((i = 0; i < ${#inet6_IFACE[@]}; i = i + 1)); do
 146                         ebegin "    ${IFACE} inet6 add ${inet6_IFACE[i]}"
 147                         ifconfig ${IFACE} inet6 add ${inet6_IFACE[i]} >${devnull}
 148                         eend $?
 149                 done
 150         fi
 151
 152         # Set static routes
 153         if [[ -n ${routes_IFACE} ]]; then
 154                 einfo "  Adding routes"
 155                 for ((i = 0; i < ${#routes_IFACE[@]}; i = i + 1)); do
 156                         ebegin "    ${routes_IFACE[i]}"
 157                         /sbin/route add ${routes_IFACE[i]}
 158                         eend $?
 159                 done
 160         fi
 161
 162         # Set default route if applicable to this interface
 163         if [[ ${gateway} == ${IFACE}/* ]]; then
 164                 local ogw=$(/bin/netstat -rn | awk '$1 == "0.0.0.0" {print $2}')
 165                 local gw=${gateway#*/}
 166                 if [[ ${ogw} != ${gw} ]]; then
 167                         ebegin "  Setting default gateway ($gw)"
 168
 169                         # First delete any existing route if it was setup by kernel...
 170                         /sbin/route del default dev ${IFACE} &>${devnull}
 171
 172                         # Second delete old gateway if it was set...
 173                         /sbin/route del default gw ${ogw} &>${devnull}
 174
 175                         # Third add our new default gateway
 176                         /sbin/route add default gw ${gw} >${devnull}
 177                         eend $? || {
 178                                 true # need to have some command in here
 179                                 # Note: This originally called stop, which is obviously
 180                                 # wrong since it's calling with a local version of IFACE.
 181                                 # The below code works correctly to abort configuration of
 182                                 # the interface, but is commented because we're assuming
 183                                 # that default route failure should not cause the interface
 184                                 # to be unconfigured.
 185                                 #local error=$?
 186                                 #ewarn "Aborting configuration of ${IFACE}"
 187                                 #iface_stop ${IFACE}
 188                                 #return ${error}
 189                         }
 190                 fi
 191         fi
 192
 193         # Enabling rp_filter causes wacky packets to be auto-dropped by
 194         # the kernel.  Note that we only do this if it is not set via
 195         # /etc/sysctl.conf ...
 196         if [[ -e /proc/sys/net/ipv4/conf/${IFACE}/rp_filter && \
 197                         -z "$(grep -s '^[^#]*rp_filter' /etc/sysctl.conf)" ]]; then
 198                 echo -n 1 > /proc/sys/net/ipv4/conf/${IFACE}/rp_filter
 199         fi
 200 }
 201
 202 # iface_stop: bring down an interface.  Don't trust information in
 203 # /etc/conf.d/net since the configuration might have changed since
 204 # iface_start ran.  Instead query for current configuration and bring
 205 # down the interface.
 206 iface_stop() {
 207         local IFACE=${1} i x aliases inet6 count
 208
 209         # Try to do a simple down (no aliases, no inet6, no dhcp)
 210         aliases="$(ifconfig | grep -o "^$IFACE:[0-9]*" | tac)"
 211         inet6="$(ifconfig ${IFACE} | awk '$1 == "inet6" {print $2}')"
 212         if [[ -z ${aliases} && -z ${inet6} && ! -e /var/run/dhcpcd-${IFACE}.pid ]]; then
 213                 ebegin "Bringing ${IFACE} down"
 214                 ifconfig ${IFACE} down &>/dev/null
 215                 eend 0
 216                 return 0
 217         fi
 218
 219         einfo "Bringing ${IFACE} down"
 220
 221         # Stop aliases before primary interface.
 222         # Note this must be done in reverse order, since ifconfig eth0:1
 223         # will remove eth0:2, etc.  It might be sufficient to simply remove
 224         # the base interface but we're being safe here.
 225         for i in ${aliases} ${IFACE}; do
 226
 227                 # Delete all the inet6 addresses for this interface
 228                 inet6="$(ifconfig ${i} | awk '$1 == "inet6" {print $3}')"
 229                 if [[ -n ${inet6} ]]; then
 230                         einfo "  Removing inet6 addresses"
 231                         for x in ${inet6}; do
 232                                 ebegin "    ${IFACE} inet6 del ${x}"
 233                                 ifconfig ${i} inet6 del ${x}
 234                                 eend $?
 235                         done
 236                 fi
 237
 238                 # Stop DHCP (should be N/A for aliases)
 239                 # Don't trust current configuration... investigate ourselves
 240                 if /sbin/dhcpcd -z ${i} &>${devnull}; then
 241                         ebegin "  Releasing DHCP lease for ${IFACE}"
 242                         for ((count = 0; count < 9; count = count + 1)); do
 243                                 /sbin/dhcpcd -z ${i} &>${devnull} || break
 244                                 sleep 1
 245                         done
 246                         [[ ${count} -lt 9 ]]
 247                         eend $? "Timed out"
 248                 fi
 249                 ebegin "  Stopping ${i}"
 250                 ifconfig ${i} down &>${devnull}
 251                 eend 0
 252         done
 253
 254         return 0
 255 }
 256
 257 start() {
 258         # These variables are set by setup_vars
 259         local status_IFACE vlans_IFACE dhcpcd_IFACE
 260         local -a ifconfig_IFACE routes_IFACE inet6_IFACE
 261
 262         # Call user-defined preup function if it exists
 263         if [[ $(type -t preup) == function ]]; then
 264                 einfo "Running preup function"
 265                 preup ${IFACE} || {
 266                         eerror "preup ${IFACE} failed"
 267                         return 1
 268                 }
 269         fi
 270
 271         # Start the primary interface and aliases
 272         setup_vars ${IFACE}
 273         iface_start ${IFACE} || return 1
 274
 275         # Start vlans
 276         local vlan
 277         for vlan in ${vlans_IFACE}; do
 278                 /sbin/vconfig add ${IFACE} ${vlan} >${devnull}
 279                 setup_vars ${IFACE}.${vlan}
 280                 iface_start ${IFACE}.${vlan}
 281         done
 282
 283         # Call user-defined postup function if it exists
 284         if [[ $(type -t postup) == function ]]; then
 285                 einfo "Running postup function"
 286                 postup ${IFACE}
 287         fi
 288 }
 289
 290 stop() {
 291         # Call user-defined predown function if it exists
 292         if [[ $(type -t predown) == function ]]; then
 293                 einfo "Running predown function"
 294                 predown ${IFACE}
 295         fi
 296
 297         # Don't depend on setup_vars since configuration might have changed.
 298         # Investigate current configuration instead.
 299         local vlan
 300         for vlan in $(ifconfig | grep -o "^${IFACE}\.[^ ]*"); do
 301                 iface_stop ${vlan}
 302                 /sbin/vconfig rem ${vlan} >${devnull}
 303         done
 304
 305         iface_stop ${IFACE} || return 1  # always succeeds, btw
 306
 307         # Call user-defined postdown function if it exists
 308         if [[ $(type -t postdown) == function ]]; then
 309                 einfo "Running postdown function"
 310                 postdown ${IFACE}
 311         fi
 312 }
 313
 314 # vim:ts=4