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# ifconfig module for net-scripts
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# Version 1.0.5
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# Copyright (c) 2004 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License V2
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# Contributed by Roy Marples (uberlord@gentoo.org)
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# Fix any potential localisation problems
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# Note that LC_ALL trumps LC_anything_else according to locale(7)
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ifconfig() {
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LC_ALL=C /sbin/ifconfig "$@"
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}
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ifconfig_tunnel() {
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LC_ALL=C /sbin/iptunnel "$@"
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}
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# void ifconfig_depend(void)
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#
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# Sets up the dependancies for the module
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ifconfig_depend() {
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after macchanger wireless
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}
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# bool ifconfig_check_installed(void)
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#
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# Returns 1 if ifconfig is installed, otherwise 0
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ifconfig_check_installed() {
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[[ -x /sbin/ifconfig ]] && return 0
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${1:-false} && eerror "For ifconfig support, emerge sys-apps/net-tools"
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return 1
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}
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# char* ifconfig_provides(void)
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#
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# Returns a string to change module definition for starting up
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ifconfig_provides() {
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echo "interface"
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}
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# char* ifconfig_module(void)
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#
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# Returns the module name
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# This is needed by dhclient as we run different scripts
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# based on the interface
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ifconfig_module() {
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echo "ifconfig"
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}
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# bool ifconfig_check_depends(void)
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#
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# Checks to see if we have the needed functions
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ifconfig_check_depends() {
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local f
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for f in interface_variable; do
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[[ $( type -t ${f} ) == function ]] && continue
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eerror "ifconfig: missing required function ${f}\n"
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return 1
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done
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return 0
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}
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# bool ifconfig_exists(char *interface, bool report)
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#
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# Returns 1 if the interface exists, otherwise 0
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ifconfig_exists() {
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local e=$( ifconfig -a | grep -o "^${1}" ) report=${2:-false}
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[[ -n ${e} ]] && return 0
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${report} && eerror "${1} does not exist"
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return 1
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}
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# void ifconfig_up(char *iface)
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#
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# provides a generic interface for bringing interfaces up
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ifconfig_up() {
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ifconfig ${1} up &>${devnull}
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}
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# void ifconfig_down(char *iface)
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#
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# provides a generic interface for bringing interfaces down
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ifconfig_down() {
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ifconfig ${1} down &>${devnull}
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}
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# bool ifconfig_is_up(char *iface, bool withaddress)
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#
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# Returns 0 if the interface is up, otherwise 1
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# If withaddress is true then the interface has to have an IPv4 address
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# assigned as well
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ifconfig_is_up() {
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local check="\<UP\>" addr=${2:-false}
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${addr} && check="\<addr:.*${check}"
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ifconfig ${1} 2>${devnull} | grep -v Scope | xargs | grep -Eq "${check}" && return 0
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return 1
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}
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# void ifconfig_set_flag(char *iface, char *flag, bool enabled)
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#
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# Sets or disables the interface flag
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ifconfig_set_flag() {
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local iface=${1} flag=${2} enable=${3}
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${enable} || flag="-${flag}"
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ifconfig ${iface} ${flag} &>${devnull}
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}
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# void ifconfig_loopback_create(void)
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#
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# Creates our loopback interface
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ifconfig_loopback_create() {
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ifconfig lo 127.0.0.1 up 2>/dev/null
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/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 \
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gw 127.0.0.1 dev lo 2> /dev/null
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}
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# void ifconfig_get_address(char *interface)
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#
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# Fetch the address retrieved by DHCP. If successful, echoes the
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# address on stdout, otherwise echoes nothing.
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ifconfig_get_address() {
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ifconfig ${1} | grep -m1 -o 'inet addr:[^ ]*' | cut -d: -f2
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}
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# void ifconfig_get_mac_address(char *interface)
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#
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# Fetch the mac address assingned to the network card
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ifconfig_get_mac_address() {
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ifconfig ${1} | grep -m1 -o 'HWaddr [^ ]*' | cut -d" " -f2
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}
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# void ifconfig_get_aliases_rev(char *interface)
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#
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# Fetch the list of aliases for an interface.
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# Outputs a space-separated list on stdout, in reverse order, for
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# example "eth0:2 eth0:1"
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ifconfig_get_aliases_rev() {
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ifconfig | grep -o "^${1}:[0-9]*" | tac | xargs
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}
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# bool ifconfig_interface_del_addresses(char *interface)
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#
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# Remove addresses from interface. Returns 0 (true) if there
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# were addresses to remove (whether successful or not). Returns 1
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# (false) if there were no addresses to remove.
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ifconfig_del_addresses() {
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local iface=${1} i
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# We don't remove addresses from aliases
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[[ ${iface} == *:* ]] && return 0
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# iproute2 can add many addresses to an iface unlike ifconfig ...
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# iproute2 added addresses cause problems for ifconfig
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# as we delete an address, a new one appears, so we have to
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# keep polling
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while ifconfig ${iface} | grep -q -m1 -o 'inet addr:[^ ]*' ; do
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ifconfig ${iface} 0.0.0.0 || break
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done
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# Remove IPv6 addresses
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for i in "$(ifconfig ${iface} | awk '$1=="inet6" && $4!="Scope:Link" {print $3}')"; do
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/sbin/ifconfig ${interface} inet6 del ${i} &>/dev/null
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done
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return 0
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}
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# char* ifconfig_get_vars(char *interface)
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#
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# Returns a string spaced with possible user set
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# configuration variables
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ifconfig_get_vars() {
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echo "config_${1} routes_${1} fallback_${1} ifconfig_${1} ifconfig_fallback_${1} routes_${1} inet6_${1} iface_${1} alias_${1} broadcast_${1} netmask_${1}"
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# The depreciated gateway var has to be handled by
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# each module if needed
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}
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# bool ifconfig_get_old_config(char *iface)
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#
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# Returns config and config_fallback for the given interface
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ifconfig_get_old_config() {
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local iface=${1} ifvar=$( interface_variable ${1} ) i inet6
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eval config=( \"\$\{ifconfig_${ifvar}\[@\]\}\" )
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eval config_fallback=( \"\$\{ifconfig_fallback_${ifvar}\[@\]\}\" )
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eval inet6=( \"\$\{inet6_${ifvar}\[@\]\}\" )
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# BACKWARD COMPATIBILITY: populate the config_IFACE array
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# if iface_IFACE is set (fex. iface_eth0 instead of ifconfig_eth0)
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eval local i=\"\$\{iface_${ifvar}\}\"
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if [[ -n ${i} && -z ${config} ]]; then
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# Make sure these get evaluated as arrays
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local -a aliases broadcasts netmasks
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# Start with the primary interface
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config=( "${i}" )
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# ..then add aliases
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eval aliases=( \$\{alias_${ifvar}\} )
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eval broadcasts=( \$\{broadcast_${ifvar}\} )
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eval netmasks=( \$\{netmask_${ifvar}\} )
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for (( i=0; i<${#aliases[@]}; i++ )); do
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config[i+1]="${aliases[i]} ${broadcasts[i]:+broadcast ${broadcasts[i]}} ${netmasks[i]:+netmask ${netmasks[i]}}"
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done
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fi
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# BACKWARD COMPATIBILITY: check for space-separated inet6 addresses
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[[ ${#inet6[@]} == 1 && ${inet6} == *' '* ]] && inet6=( ${inet6} )
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# Add inet6 addresses to our config if required
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[[ -n ${inet6} ]] && config=( "${config[@]}" "${inet6[@]}" )
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return 0
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}
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# bool ifconfig_iface_stop(char *interface)
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#
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# Do final shutdown for an interface or alias.
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#
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# Returns 0 (true) when successful, non-zero (false) on failure
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ifconfig_iface_stop() {
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# If an alias is already down, then "ifconfig eth0:1 down"
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# will try to bring it up with an address of "down" which
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# fails. Do some double-checking before returning error
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# status
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ifconfig_is_up $1 || return 0
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ifconfig_down ${1} && return 0
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# It is sometimes impossible to transition an alias from the
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# UP state... particularly if the alias has no address. So
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# ignore the failure, which should be okay since the entire
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# interface will be shut down eventually.
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[[ ${1} == *:* ]] && return 0
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return 1
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}
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# bool ifconfig_post_start(char *iface)
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#
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# Bring up iface using ifconfig utilities, called from iface_start
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#
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# Returns 0 (true) when successful on the primary interface, non-zero
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# (false) when the primary interface fails. Aliases are allowed to
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# fail, the routine should still return success to indicate that
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# net.eth0 was successful
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ifconfig_post_start() {
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local iface=${1} ifvar=$( interface_variable ${1} ) routes x
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# Make sure interface is marked UP
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ifconfig_up ${iface}
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eval routes=( \"\$\{routes_${ifvar}\[@\]\}\" )
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# BACKWARD COMPATIBILITY: set the default gateway
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if [[ ${gateway} == ${iface}/* ]]; then
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# We don't add the old gateway if one has been set in routes_IFACE
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local gw=true
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for x in "${routes[@]}"; do
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[[ ${x} != "*default gw*" ]] && continue
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gw=false
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break
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done
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${gw} && routes=( "${routes[@]}" "default gw ${gateway#*/}" )
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fi
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[[ -z ${routes} ]] && return 0
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# Add routes for this interface, might even include default gw
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einfo "Adding routes"
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eindent
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for x in "${routes[@]}"; do
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# Support iproute2 style routes
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x=${x//via/gw}
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ebegin "${x}"
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# Support adding IPv6 addresses easily
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if [[ ${x} == *:* && ${x} != *'-A inet6'* ]]; then
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/sbin/route add -A inet6 ${x} &>${devnull}
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else
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/sbin/route add ${x} &>${devnull}
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fi
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eend $?
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done
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eoutdent
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return 0
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}
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# bool ifconfig_add_address(char *iface, char *options ...)
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#
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# Adds the given address to the interface
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ifconfig_add_address() {
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local iface=${1} i=0
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ifconfig_exists ${iface} true || return 1
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# Extract the config
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local -a config=( "$@" )
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config=( ${config[@]:1} )
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if [[ ${config[0]} == *:* ]]; then
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# Support IPv6 - nice and simple
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config[0]="inet6 add ${config[0]}"
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else
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# IPv4 is tricky - ifconfig requires an aliased device
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# for multiple addresses
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if ifconfig ${iface} | grep -v Scope | xargs | grep -Eq "\<addr:.*" ; then
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# Get the last alias made for the interface and add 1 to it
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i=$( ifconfig | tac | grep -m 1 -o "^${iface}:[0-9]*" | awk -F: '{ print $2 }' )
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i=${i:-0}
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(( i++ ))
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iface=${iface}:${i}
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fi
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# Support iproute2 style config where possible
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config=( "${config[@]//brd/broadcast}" )
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config=( "${config[@]//peer/pointtopoint}" )
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fi
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ewarn "ifconfig ${iface} ${config[@]}"
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ifconfig ${iface} ${config[@]} &>${devnull}
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eend $?
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return $?
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}
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