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etc/sysconfig/network-scripts/ifup-aliases��0000755��00000027756�14720473642�0015043 0��ustar�00��#!/bin/bash # # configures aliases of device $1 # # This script goes out of its way to arrive at the configuration of ip # aliases described in the ifcfg-$DEV:* and ifcfg-$DEV-range* files from # whatever existing configuration it may be given: existing aliases not # specified in the configuration will be removed, netmasks and broadcast # addrs will be updated on existing aliases, and new aliases will be setup. # # range specification files: # # One can specify ranges of alised ipaddress using ifcfg-$DEV-range* files. # Specify multiple ranges using multiple files, such as ifcfg-eth0-range0 and # ifcfg-eth0-range1, etc. In these files, the following configuration variables # specify the range: # # IPADDR_START -- ipaddr to start range at. eg "192.168.30.1" # IPADDR_END -- ipaddr to end range at. eg "192.168.30.254" # CLONENUM_START -- interface clone number to start using for this range. eg "0" # # The above example values create the interfaces eth0:0 through eth0:253 using # ipaddrs 192.168.30.1 through 192.168.30.254, inclusive. # # Other configuration variables such as NETMASK and BROADCAST may be specified # in the range file and will apply to all of the ipaddresses in the range. Range # files also inherit configuration from the ifcfg-$DEV file just like normal. # # Note that IPADDR_START and IPADR_END are required to be in the same class-c # block. I.e. IPADDR_START=192.168.30.1 and IPADDR_END=192.168.31.255 is # not valid. # # speed with large sets of interfaces: # # Considerable effort was spent making this script fast. It can efficiently # handle a thousand ip aliases on one interface. # # With large sets of ipaddresses the NO_ALIASROUTING=yes configuration is # highly recommended. (This can be specified in ifcfg-$DEV and inherited.) This # prevents this script from setting up routing details for the virtual # interfaces, which I don't think is needed, because outgoing traffic can use the # main interface. However, make your own conclusions on what you need. # # My test setup of four class C address blocks on a P166 took 25 seconds of # which 16 seconds of this was spent in the ifcconfig calls. Without the # NO_ALIASROUTING=yes config an additional 12 seconds is spent in route calls. # # notes on internals: # # This script uses the bash "eval" command to lookup shell variables with names # which are generated from other shell variables. This allows us to, in effect, # create hashes using the shell variable namesspace by just including the hash # key in the name of the variable. # # This script originally written by: David Harris <dharris@drh.net> # Principal Engineer, DRH Internet # June 30, 1999 # # modified by: Bill Nottingham <notting@redhat.com> TEXTDOMAIN=initscripts TEXTDOMAINDIR=/etc/locale device=$1 if [ "$device" = "" ]; then echo $"usage: ifup-aliases <net-device> [<parent-config>]\n" exit 1 fi PARENTCONFIG=${2:-ifcfg-$device} parent_device=$device cd /etc/sysconfig/network-scripts . ./network-functions # Grab the current configuration of any running aliases, place device info # into variables of the form: # rdev_<index>_addr = <ip address> # rdev_<index>_pb = <prefix>_<broadcast> # rdevip_<ipaddress> = <index> # Example: # rdev_0_addr=192.168.1.1 # rdev_0_pb=24_192.16.1.255 # rdevip_192_168_1_1=0 # # A list of all the devices is created in rdev_LIST. eval $( ip addr show $device label $device:* \| \ awk 'BEGIN { COUNT=0;LAST_DEV="" } /inet / { # Split IP address into address/prefix split($2,IPADDR,"/"); # Create A_B_C_D IP address form IP_ADDR=IPADDR[1]; gsub(/\./,"_",IP_ADDR); # Split device into device:index split($NF,DEV,":"); # Update last device LAST_DEV=LAST_DEV " " DEV[2]; printf("rdev_%s_addr=%s\nrdevip_%s=%s\nrdev_%s_pb=%s_%s\nrdev_LIST=\"%s\"\n", DEV[2],IPADDR[1],IP_ADDR,DEV[2],DEV[2],IPADDR[2],$4,LAST_DEV); } END { if(LAST_DEV == "") print "no_devices_are_up=yes" }' ); # # Store configuration of the parent device and network # # read from the /etc/sysconfig/network eval ` ( . /etc/sysconfig/network; echo network_GATEWAY=$GATEWAY\;; echo network_GATEWAYDEV=$GATEWAYDEV\;; ) ` # read defaults from the parent config file [ -f $PARENTCONFIG ] \|\| { net_log $"Missing config file $PARENTCONFIG." exit 1 } eval ` ( . ./$PARENTCONFIG; echo default_PREFIX=$PREFIX\;; echo default_NETMASK=$NETMASK\;; echo default_BROADCAST=$BROADCAST\;; echo default_GATEWAY=$GATEWAY\;; echo default_NO_ALIASROUTING=$NO_ALIASROUTING\;; echo default_ARPCHECK=$ARPCHECK\;; echo default_ARPUPDATE=$ARPUPDATE\;; ) ` [ -z "$default_GATEWAY" ] && default_GATEWAY=$network_GATEWAY function ini_env () { DEVICE="" IPADDR="" IPV6ADDR="" PREFIX=$default_PREFIX NETMASK=$default_NETMASK BROADCAST=$default_BROADCAST GATEWAY=$default_GATEWAY NO_ALIASROUTING=$default_NO_ALIASROUTING ONPARENT="" ARPCHECK=$default_ARPCHECK ARPUPDATE=$default_ARPUPDATE } function is_default_gateway () { LC_ALL=C /sbin/ip route ls default scope global \ \| awk '$3 == "'"$1"'" { found = 1; } END { exit found == 0; }' } # # Read the alias configuration files and enable each aliased # device using new_interface() # function new_interface () { ipa=$IPADDR; ipb=${ipa#.}; ipc=${ipb#.}; IPGLOP="${ipa%%.}_${ipb%%.}_${ipc%%.}_${ipc#.}"; DEVNUM=${DEVICE#:} MATCH='^[0-9A-Za-z_]$' if (LC_ALL=C; [[ ! "$DEVNUM" =~ $MATCH ]]); then net_log $"error in $FILE: invalid alias number" return 1 fi eval " ipseen=\$ipseen_${IPGLOP}; devseen=\$devseen_${DEVNUM}; ipseen_${IPGLOP}=$FILE; devseen_${DEVNUM}=$FILE; "; if [ -n "$ipseen" ]; then net_log $"error in $FILE: already seen ipaddr $IPADDR in $ipseen" return 1 fi if [ -n "$devseen" ]; then net_log $"error in $FILE: already seen device $parent_device:$DEVNUM in $devseen" return 1 fi if [ -z "$DEVICE" -o -z "$IPADDR" ]; then if [ -n "$IPV6ADDR" -a -n "$DEVICE" ] && ! is_false "$IPV6INIT"; then /etc/sysconfig/network-scripts/ifup-ipv6 ${DEVICE} return $? fi net_log $"error in $FILE: didn't specify device or ipaddr" return 1 fi if [ -z "$NETMASK" -a -z "$PREFIX" ]; then net_log $"error iN $FILE: didn't specify netmask or prefix" fi if [ -z "$PREFIX" ]; then eval $(/bin/ipcalc --prefix ${IPADDR} ${NETMASK}) fi if [ -z "$BROADCAST" -o "$BROADCAST" = "$default_BROADCAST" ]; then eval $(/bin/ipcalc --broadcast ${IPADDR}/${PREFIX}) fi if [ "$no_devices_are_up" = "yes" ]; then setup_this=yes else setup_this="" eval " rdev_addr=\$rdev_${DEVNUM}_addr; rdev_pb=\$rdev_${DEVNUM}_pb; rdev_mark=\$rdev_${DEVNUM}_mark; rdevip=\$rdevip_${IPGLOP}; "; if [ -n "$rdev_addr" ]; then if [ "$rdev_addr" = "${IPADDR}" ]; then newmark=keep if [ "$rdev_pb" != "${PREFIX}_${BROADCAST}" ]; then setup_this=freshen else setup_this=no fi else if [ "$rdev_mark" != "remove" ]; then /sbin/ip addr flush dev $parent_device label $parent_device:${DEVNUM} fi newmark=remove setup_this=yes fi if [ -n "$rdev_mark" -a "$rdev_mark" != "$newmark" ]; then net_log $"error in ifcfg-${parent_device}: files" return 1 fi eval " rdev_${DEVNUM}_mark=\$newmark "; else setup_this=yes fi if [ -n "$rdevip" -a "$rdevip" != "${DEVNUM}" ]; then eval " mark_remove=\$rdev_${rdevip}_mark "; if [ -n "$mark_remove" -a "$mark_remove" != "remove" ]; then net_log $"error in ifcfg-${parent_device}: files" return 1 fi if [ "$mark_remove" != "remove" ]; then eval " rdev_${rdevip}_mark=remove "; /sbin/ip addr flush dev $parent_device label $parent_device:$rdevip fi fi fi if [ "$setup_this" = "freshen" ] ; then # we can do the freshen stuff right now /sbin/ip addr change ${IPADDR}/${PREFIX} brd ${BROADCAST} fi if [ "$setup_this" = "yes" ] ; then if [ "${parent_device}" != "lo" ] && [ "${ARPCHECK}" != "no" ] && \ is_available ${parent_device} && \ ( grep -qswi "up" /sys/class/net/${parent_device}/operstate \|\| grep -qswi "1" /sys/class/net/${parent_device}/carrier ) ; then echo $"Determining if ip address ${IPADDR} is already in use for device ${parent_device}..." ARPING=$(/sbin/arping -c 2 -w ${ARPING_WAIT:-3} -D -I ${parent_device} ${IPADDR}) if [ $? = 1 ]; then ARPINGMAC=$(echo $ARPING \| sed -ne 's/.\[$.$\]./\1/p') net_log $"Error, some other host ($ARPINGMAC) already uses address ${IPADDR}." return 1 fi fi /sbin/ip addr add ${IPADDR}/${PREFIX} brd ${BROADCAST} \ dev ${parent_device} label ${DEVICE} # update ARP cache of neighboring computers: if ! is_false "${ARPUPDATE}" && [ "${REALDEVICE}" != "lo" ]; then /sbin/arping -q -A -c 1 -w ${ARPING_UPDATE_WAIT:-3} -I ${parent_device} ${IPADDR} ( sleep 2; /sbin/arping -q -U -c 1 -w ${ARPING_UPDATE_WAIT:-3} -I ${parent_device} ${IPADDR} ) > /dev/null 2>&1 < /dev/null & fi ! is_false "$IPV6INIT" && \ /etc/sysconfig/network-scripts/ifup-ipv6 ${DEVICE} if [ "$NO_ALIASROUTING" != yes ]; then GATEWAYDEV=$network_GATEWAYDEV; if [ -n "${GATEWAY}" -a \ $ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${DEVICE}" $ ]; then # set up default gateway, if it isn't already there if ! is_default_gateway "$GATEWAY"; then ip route replace default ${METRIC:+metric $METRIC} via ${GATEWAY} dev ${DEVICE} fi fi /etc/sysconfig/network-scripts/ifup-routes ${DEVICE} ${NAME} ifuplocal_queue="$ifuplocal_queue $DEVICE" fi fi } if [ "$BASH_VERSINFO" ]; then shopt -s nullglob else allow_null_glob_expansion=foo fi for FILE in ifcfg-${parent_device}: ; do is_ignored_file "$FILE" && continue ini_env . ./$FILE [ -z "$DEVICE" ] && DEVICE=${FILE##ifcfg-} [ "$ONPARENT" != "no" -a "$ONPARENT" != "NO" ] && new_interface unset DEVICE done for FILE in ifcfg-${parent_device}-range* ; do is_ignored_file "$FILE" && continue ini_env . ./$FILE ipaddr_prefix=${IPADDR_START%.} ipaddr_startnum=${IPADDR_START##.} ipaddr_endnum=${IPADDR_END##.} if [ "${IPADDR_START%.}" != "${IPADDR_END%.*}" ]; then net_log $"error in $FILE: IPADDR_START and IPADDR_END don't agree" continue fi if [ $ipaddr_startnum -gt $ipaddr_endnum ]; then net_log $"error in $FILE: IPADDR_START greater than IPADDR_END" continue fi ipaddr_num=$ipaddr_startnum ipaddr_clonenum=$CLONENUM_START while [ $ipaddr_num -le $ipaddr_endnum ]; do IPADDR="$ipaddr_prefix.$ipaddr_num" DEVICE="$parent_device:$ipaddr_clonenum" IPV6INIT="no" [ "$ONPARENT" != "no" -a "$ONPARENT" != "NO" ] && new_interface ipaddr_num=$(($ipaddr_num+1)) ipaddr_clonenum=$(($ipaddr_clonenum+1)) done done # # Remove any devices that should not be around # for DEVNUM in $rdev_LIST ; do eval " rdev_mark=\$rdev_${DEVNUM}_mark " if [ -z "$rdev_mark" ]; then /sbin/ip addr flush dev $parent_device label $parent_device:${DEVNUM} fi done if [ -x /sbin/ifup-local ]; then for DEVICE in $ifuplocal_queue ; do /sbin/ifup-local ${DEVICE} done fi ��

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