mirror of
https://gitlab.isc.org/isc-projects/dhcp
synced 2025-08-31 06:15:55 +00:00
[19430] linux script significantly updated
# Conflicts: # client/scripts/linux
This commit is contained in:
Tomek Mrugalski
@@ -22,330 +22,419 @@
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# 4. TIMEOUT not tested. ping has a flag I don't know, and I'm suspicious
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# of the $1 in its args.
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# 'ip' just looks too weird. /sbin/ip looks less weird.
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# 5. Script refresh in 2017. The aliasing code was too convoluted and needs
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# to go away. Migrated DHCPv4 script to ip command from iproute2 suite.
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# This is based on Debian script with some tweaks. ifconfig is no longer
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# used. Everything is done using ip tool from ip-route2.
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# 'ip' just looks too weird. Also, we now have unit-tests! Those unit-tests
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# overwirte this line to use a fake ip-echo tool. It's also convenient
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# if your system holds ip tool in a non-standard location.
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ip=/sbin/ip
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# update /etc/resolv.conf based on received values
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# This updated version mostly follows Debian script by Andrew Pollock et al.
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make_resolv_conf() {
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if [ x"$new_domain_name_servers" != x ]; then
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cat /dev/null > /etc/resolv.conf.dhclient
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chmod 644 /etc/resolv.conf.dhclient
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if [ x"$new_domain_search" != x ]; then
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echo search $new_domain_search >> /etc/resolv.conf.dhclient
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elif [ x"$new_domain_name" != x ]; then
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# Note that the DHCP 'Domain Name Option' is really just a domain
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# name, and that this practice of using the domain name option as
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# a search path is both nonstandard and deprecated.
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echo search $new_domain_name >> /etc/resolv.conf.dhclient
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local new_resolv_conf
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# DHCPv4
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if [ -n "$new_domain_search" ] || [ -n "$new_domain_name" ] ||
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[ -n "$new_domain_name_servers" ]; then
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new_resolv_conf=/etc/resolv.conf.dhclient-new
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rm -f $new_resolv_conf
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if [ -n "$new_domain_name" ]; then
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echo domain ${new_domain_name%% *} >>$new_resolv_conf
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fi
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if [ -n "$new_domain_search" ]; then
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if [ -n "$new_domain_name" ]; then
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domain_in_search_list=""
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for domain in $new_domain_search; do
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if [ "$domain" = "${new_domain_name}" ] ||
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[ "$domain" = "${new_domain_name}." ]; then
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domain_in_search_list="Yes"
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fi
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done
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if [ -z "$domain_in_search_list" ]; then
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new_domain_search="$new_domain_name $new_domain_search"
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fi
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fi
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echo "search ${new_domain_search}" >> $new_resolv_conf
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elif [ -n "$new_domain_name" ]; then
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echo "search ${new_domain_name}" >> $new_resolv_conf
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fi
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if [ -n "$new_domain_name_servers" ]; then
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for nameserver in $new_domain_name_servers; do
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echo nameserver $nameserver >>$new_resolv_conf
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done
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else # keep 'old' nameservers
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sed -n /^\w*[Nn][Aa][Mm][Ee][Ss][Ee][Rr][Vv][Ee][Rr]/p /etc/resolv.conf >>$new_resolv_conf
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fi
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if [ -f /etc/resolv.conf ]; then
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chown --reference=/etc/resolv.conf $new_resolv_conf
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chmod --reference=/etc/resolv.conf $new_resolv_conf
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fi
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mv -f $new_resolv_conf /etc/resolv.conf
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# DHCPv6
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elif [ -n "$new_dhcp6_domain_search" ] || [ -n "$new_dhcp6_name_servers" ]; then
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new_resolv_conf=/etc/resolv.conf.dhclient-new
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rm -f $new_resolv_conf
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if [ -n "$new_dhcp6_domain_search" ]; then
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echo "search ${new_dhcp6_domain_search}" >> $new_resolv_conf
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fi
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if [ -n "$new_dhcp6_name_servers" ]; then
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for nameserver in $new_dhcp6_name_servers; do
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# append %interface to link-local-address nameservers
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if [ "${nameserver##fe80::}" != "$nameserver" ] ||
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[ "${nameserver##FE80::}" != "$nameserver" ]; then
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nameserver="${nameserver}%${interface}"
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fi
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echo nameserver $nameserver >>$new_resolv_conf
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done
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else # keep 'old' nameservers
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sed -n /^\w*[Nn][Aa][Mm][Ee][Ss][Ee][Rr][Vv][Ee][Rr]/p /etc/resolv.conf >>$new_resolv_conf
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fi
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if [ -f /etc/resolv.conf ]; then
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chown --reference=/etc/resolv.conf $new_resolv_conf
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chmod --reference=/etc/resolv.conf $new_resolv_conf
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fi
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mv -f $new_resolv_conf /etc/resolv.conf
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fi
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for nameserver in $new_domain_name_servers; do
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echo nameserver $nameserver >>/etc/resolv.conf.dhclient
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done
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}
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mv /etc/resolv.conf.dhclient /etc/resolv.conf
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elif [ "x${new_dhcp6_name_servers}" != x ] ; then
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cat /dev/null > /etc/resolv.conf.dhclient6
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chmod 644 /etc/resolv.conf.dhclient6
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# set host name
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set_hostname() {
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local current_hostname
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if [ "x${new_dhcp6_domain_search}" != x ] ; then
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echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6
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if [ -n "$new_host_name" ]; then
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current_hostname=$(hostname)
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# current host name is empty, '(none)' or 'localhost' or differs from new one from DHCP
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if [ -z "$current_hostname" ] ||
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[ "$current_hostname" = '(none)' ] ||
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[ "$current_hostname" = 'localhost' ] ||
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[ "$current_hostname" = "$old_host_name" ]; then
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if [ "$new_host_name" != "$old_host_name" ]; then
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hostname "$new_host_name"
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fi
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fi
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fi
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shopt -s nocasematch
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for nameserver in ${new_dhcp6_name_servers} ; do
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# If the nameserver has a link-local address
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# add a <zone_id> (interface name) to it.
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if [[ "$nameserver" =~ ^fe80:: ]]
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then
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zone_id="%$interface"
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else
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zone_id=
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fi
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echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6
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done
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shopt -u nocasematch
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}
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mv /etc/resolv.conf.dhclient6 /etc/resolv.conf
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fi
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# run given script
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run_hook() {
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local script
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local exit_status
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script="$1"
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if [ -f $script ]; then
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. $script
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fi
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if [ -n "$exit_status" ] && [ "$exit_status" -ne 0 ]; then
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logger -p daemon.err "$script returned non-zero exit status $exit_status"
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fi
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return $exit_status
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}
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# run scripts in given directory
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run_hookdir() {
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local dir
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local exit_status
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dir="$1"
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if [ -d "$dir" ]; then
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for script in $(run-parts --list $dir); do
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run_hook $script || true
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exit_status=$?
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done
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fi
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return $exit_status
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}
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# Must be used on exit. Invokes the local dhcp client exit hooks, if any.
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exit_with_hooks() {
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exit_status=$1
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if [ -f /etc/dhclient-exit-hooks ]; then
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. /etc/dhclient-exit-hooks
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fi
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# probably should do something with exit status of the local script
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exit $exit_status
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exit_status=$1
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# Source the documented exit-hook script, if it exists
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if ! run_hook /etc/dhclient-exit-hooks; then
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exit_status=$?
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fi
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# Now run scripts in the Debian-specific directory.
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if ! run_hookdir /etc/dhclient-exit-hooks.d; then
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exit_status=$?
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fi
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exit $exit_status
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}
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# Invoke the local dhcp client enter hooks, if they exist.
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if [ -f /etc/dhclient-enter-hooks ]; then
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exit_status=0
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. /etc/dhclient-enter-hooks
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# allow the local script to abort processing of this state
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# local script must set exit_status variable to nonzero.
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if [ $exit_status -ne 0 ]; then
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exit $exit_status
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fi
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fi
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run_hook /etc/dhclient-enter-hooks
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run_hookdir /etc/dhclient-enter-hooks.d
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###
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### DHCPv4 Handlers
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###
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# Execute the operation
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case "$reason" in
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if [ x$new_broadcast_address != x ]; then
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new_broadcast_arg="broadcast $new_broadcast_address"
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fi
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if [ x$old_broadcast_address != x ]; then
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old_broadcast_arg="broadcast $old_broadcast_address"
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fi
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if [ x$new_subnet_mask != x ]; then
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new_subnet_arg="netmask $new_subnet_mask"
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fi
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if [ x$old_subnet_mask != x ]; then
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old_subnet_arg="netmask $old_subnet_mask"
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fi
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if [ x$alias_subnet_mask != x ]; then
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alias_subnet_arg="netmask $alias_subnet_mask"
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fi
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if [ x$new_interface_mtu != x ]; then
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mtu_arg="mtu $new_interface_mtu"
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fi
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if [ x$IF_METRIC != x ]; then
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metric_arg="metric $IF_METRIC"
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fi
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### DHCPv4 Handlers
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if [ x$reason = xMEDIUM ]; then
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# Linux doesn't do mediums (ok, ok, media).
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exit_with_hooks 0
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fi
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MEDIUM|ARPCHECK|ARPSEND)
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# Do nothing
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;;
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PREINIT)
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# The DHCP client is requesting that an interface be
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# configured as required in order to send packets prior to
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# receiving an actual address. - dhclient-script(8)
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if [ x$reason = xPREINIT ]; then
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if [ x$alias_ip_address != x ]; then
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# Bring down alias interface. Its routes will disappear too.
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ifconfig $interface:0- inet 0
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fi
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ifconfig $interface 0 up
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# ensure interface is up
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${ip} link set dev ${interface} up
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# We need to give the kernel some time to get the interface up.
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sleep 1
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if [ -n "$alias_ip_address" ]; then
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# flush alias IP from interface
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${ip} -4 addr flush dev ${interface} label ${interface}:0
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fi
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exit_with_hooks 0
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fi
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;;
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if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
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exit_with_hooks 0
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fi
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if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
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[ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
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current_hostname=`hostname`
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if [ x$current_hostname = x ] || \
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[ x$current_hostname = "x(none)" ] || \
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[ x$current_hostname = xlocalhost ] || \
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[ x$current_hostname = x$old_host_name ]; then
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if [ x$new_host_name != x$old_host_name ]; then
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hostname "$new_host_name"
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fi
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fi
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if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
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[ x$alias_ip_address != x$old_ip_address ]; then
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# Possible new alias. Remove old alias.
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ifconfig $interface:0- inet 0
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fi
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if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
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# IP address changed. Bringing down the interface will delete all routes,
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# and clear the ARP cache.
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ifconfig $interface inet 0 down
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BOUND|RENEW|REBIND|REBOOT)
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set_hostname
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fi
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if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
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[ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
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if [ -n "$old_ip_address" ] && [ -n "$alias_ip_address" ] &&
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[ "$alias_ip_address" != "$old_ip_address" ]; then
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# alias IP may have changed => flush it
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${ip} -4 addr flush dev ${interface} label ${interface}:0
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fi
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ifconfig $interface inet $new_ip_address $new_subnet_arg \
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$new_broadcast_arg $mtu_arg
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# Add a network route to the computed network address.
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for router in $new_routers; do
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if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
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route add -host $router dev $interface
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fi
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route add default gw $router $metric_arg dev $interface
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done
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else
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# we haven't changed the address, have we changed other options
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# that we wish to update?
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if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
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# if we've changed routers delete the old and add the new.
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for router in $old_routers; do
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route del default gw $router
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done
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for router in $new_routers; do
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if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
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route add -host $router dev $interface
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fi
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route add default gw $router $metric_arg dev $interface
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done
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fi
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fi
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if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
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then
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ifconfig $interface:0- inet 0
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ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
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route add -host $alias_ip_address $interface:0
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fi
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make_resolv_conf
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exit_with_hooks 0
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fi
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if [ -n "$old_ip_address" ] &&
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[ "$old_ip_address" != "$new_ip_address" ]; then
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# leased IP has changed => flush it
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${ip} -4 addr flush dev ${interface} label ${interface}
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fi
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if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
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|| [ x$reason = xSTOP ]; then
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if [ x$alias_ip_address != x ]; then
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# Turn off alias interface.
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ifconfig $interface:0- inet 0
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fi
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if [ x$old_ip_address != x ]; then
|
||||
# Shut down interface, which will delete routes and clear arp cache.
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ifconfig $interface inet 0 down
|
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fi
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if [ x$alias_ip_address != x ]; then
|
||||
ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
|
||||
route add -host $alias_ip_address $interface:0
|
||||
fi
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
if [ -z "$old_ip_address" ] ||
|
||||
[ "$old_ip_address" != "$new_ip_address" ] ||
|
||||
[ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
|
||||
# new IP has been leased or leased IP changed => set it
|
||||
${ip} -4 addr add ${new_ip_address}${new_subnet_mask:+/$new_subnet_mask} \
|
||||
${new_broadcast_address:+broadcast $new_broadcast_address} \
|
||||
dev ${interface} label ${interface}
|
||||
|
||||
if [ x$reason = xTIMEOUT ]; then
|
||||
if [ x$alias_ip_address != x ]; then
|
||||
ifconfig $interface:0- inet 0
|
||||
fi
|
||||
ifconfig $interface inet $new_ip_address $new_subnet_arg \
|
||||
$new_broadcast_arg $mtu_arg
|
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set $new_routers
|
||||
if ping -q -c 1 $1; then
|
||||
if [ x$new_ip_address != x$alias_ip_address ] && \
|
||||
[ x$alias_ip_address != x ]; then
|
||||
ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg
|
||||
route add -host $alias_ip_address dev $interface:0
|
||||
fi
|
||||
for router in $new_routers; do
|
||||
if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
|
||||
route add -host $router dev $interface
|
||||
fi
|
||||
route add default gw $router $metric_arg dev $interface
|
||||
done
|
||||
make_resolv_conf
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
ifconfig $interface inet 0 down
|
||||
exit_with_hooks 1
|
||||
fi
|
||||
if [ -n "$new_interface_mtu" ]; then
|
||||
# set MTU
|
||||
${ip} link set dev ${interface} mtu ${new_interface_mtu}
|
||||
fi
|
||||
|
||||
###
|
||||
### DHCPv6 Handlers
|
||||
###
|
||||
# if we have $new_rfc3442_classless_static_routes then we have to
|
||||
# ignore $new_routers entirely
|
||||
if [ ! "$new_rfc3442_classless_static_routes" ]; then
|
||||
# set if_metric if IF_METRIC is set or there's more than one router
|
||||
if_metric="$IF_METRIC"
|
||||
if [ "${new_routers%% *}" != "${new_routers}" ]; then
|
||||
if_metric=${if_metric:-1}
|
||||
fi
|
||||
|
||||
if [ x$reason = xPREINIT6 ] ; then
|
||||
# Ensure interface is up.
|
||||
${ip} link set ${interface} up
|
||||
for router in $new_routers; do
|
||||
if [ "$new_subnet_mask" = "255.255.255.255" ]; then
|
||||
# point-to-point connection => set explicit route
|
||||
${ip} -4 route add ${router} dev $interface >/dev/null 2>&1
|
||||
fi
|
||||
|
||||
# We need to give the kernel some time to active interface
|
||||
interface_up_wait_time=5
|
||||
for i in $(seq 0 ${interface_up_wait_time})
|
||||
do
|
||||
ifconfig ${interface} | grep RUNNING >/dev/null 2>&1
|
||||
if [ $? -eq 0 ]; then
|
||||
break;
|
||||
fi
|
||||
sleep 1
|
||||
done
|
||||
# set default route
|
||||
${ip} -4 route add default via ${router} dev ${interface} \
|
||||
${if_metric:+metric $if_metric} >/dev/null 2>&1
|
||||
|
||||
# Remove any stale addresses from aborted clients.
|
||||
${ip} -f inet6 addr flush dev ${interface} scope global permanent
|
||||
if [ -n "$if_metric" ]; then
|
||||
if_metric=$((if_metric+1))
|
||||
fi
|
||||
done
|
||||
fi
|
||||
fi
|
||||
|
||||
# Wait for duplicate address detection for this interface if the
|
||||
# --dad-wait-time parameter has been specified and is greater than
|
||||
# zero.
|
||||
if [ ${dad_wait_time} -gt 0 ]; then
|
||||
# Check if any IPv6 address on this interface is marked as
|
||||
# tentative.
|
||||
${ip} addr show ${interface} | grep inet6 | grep tentative \
|
||||
&> /dev/null
|
||||
if [ $? -eq 0 ]; then
|
||||
# Wait for duplicate address detection to complete or for
|
||||
# the timeout specified as --dad-wait-time.
|
||||
for i in $(seq 0 $dad_wait_time)
|
||||
do
|
||||
# We're going to poll for the tentative flag every second.
|
||||
sleep 1
|
||||
${ip} addr show ${interface} | grep inet6 | grep tentative \
|
||||
&> /dev/null
|
||||
if [ $? -ne 0 ]; then
|
||||
break;
|
||||
fi
|
||||
done
|
||||
fi
|
||||
fi
|
||||
if [ -n "$alias_ip_address" ] &&
|
||||
[ "$new_ip_address" != "$alias_ip_address" ]; then
|
||||
# separate alias IP given, which may have changed
|
||||
# => flush it, set it & add host route to it
|
||||
${ip} -4 addr flush dev ${interface} label ${interface}:0
|
||||
${ip} -4 addr add ${alias_ip_address}${alias_subnet_mask:+/$alias_subnet_mask} \
|
||||
dev ${interface} label ${interface}:0
|
||||
${ip} -4 route add ${alias_ip_address} dev ${interface} >/dev/null 2>&1
|
||||
fi
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
# update /etc/resolv.conf
|
||||
make_resolv_conf
|
||||
|
||||
if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ] ; then
|
||||
echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
|
||||
;;
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
EXPIRE|FAIL|RELEASE|STOP)
|
||||
if [ -n "$alias_ip_address" ]; then
|
||||
# flush alias IP
|
||||
${ip} -4 addr flush dev ${interface} label ${interface}:0
|
||||
fi
|
||||
|
||||
if [ x$reason = xBOUND6 ] ; then
|
||||
if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
|
||||
exit_with_hooks 2;
|
||||
fi
|
||||
if [ -n "$old_ip_address" ]; then
|
||||
# flush leased IP
|
||||
${ip} -4 addr flush dev ${interface} label ${interface}
|
||||
fi
|
||||
|
||||
${ip} -f inet6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
|
||||
dev ${interface} scope global
|
||||
if [ -n "$alias_ip_address" ]; then
|
||||
# alias IP given => set it & add host route to it
|
||||
${ip} -4 addr add ${alias_ip_address}${alias_subnet_mask:+/$alias_subnet_mask} \
|
||||
dev ${interface} label ${interface}:0
|
||||
${ip} -4 route add ${alias_ip_address} dev ${interface} >/dev/null 2>&1
|
||||
fi
|
||||
|
||||
# Check for nameserver options.
|
||||
make_resolv_conf
|
||||
;;
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
TIMEOUT)
|
||||
if [ -n "$alias_ip_address" ]; then
|
||||
# flush alias IP
|
||||
${ip} -4 addr flush dev ${interface} label ${interface}:0
|
||||
fi
|
||||
|
||||
if [ x$reason = xRENEW6 ] || [ x$reason = xREBIND6 ] ; then
|
||||
if [ x${new_ip6_address} != x ] && [ x${new_ip6_prefixlen} != x ] ; then
|
||||
${ip} -f inet6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
|
||||
dev ${interface} scope global
|
||||
fi
|
||||
# set IP from recorded lease
|
||||
${ip} -4 addr add ${new_ip_address}${new_subnet_mask:+/$new_subnet_mask} \
|
||||
${new_broadcast_address:+broadcast $new_broadcast_address} \
|
||||
dev ${interface} label ${interface}
|
||||
|
||||
# Make sure nothing has moved around on us.
|
||||
if [ -n "$new_interface_mtu" ]; then
|
||||
# set MTU
|
||||
${ip} link set dev ${interface} mtu ${new_interface_mtu}
|
||||
fi
|
||||
|
||||
# Nameservers/domains/etc.
|
||||
if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] ||
|
||||
[ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ] ; then
|
||||
make_resolv_conf
|
||||
fi
|
||||
# if there is no router recorded in the lease or the 1st router answers pings
|
||||
if [ -z "$new_routers" ] || ping -q -c 1 "${new_routers%% *}"; then
|
||||
# if we have $new_rfc3442_classless_static_routes then we have to
|
||||
# ignore $new_routers entirely
|
||||
if [ ! "$new_rfc3442_classless_static_routes" ]; then
|
||||
if [ -n "$alias_ip_address" ] &&
|
||||
[ "$new_ip_address" != "$alias_ip_address" ]; then
|
||||
# separate alias IP given => set up the alias IP & add host route to it
|
||||
${ip} -4 addr add \
|
||||
${alias_ip_address}${alias_subnet_mask:+/$alias_subnet_mask} \
|
||||
dev ${interface} label ${interface}:0
|
||||
${ip} -4 route add ${alias_ip_address} dev ${interface} >/dev/null 2>&1
|
||||
fi
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
# set if_metric if IF_METRIC is set or there's more than one router
|
||||
if_metric="$IF_METRIC"
|
||||
if [ "${new_routers%% *}" != "${new_routers}" ]; then
|
||||
if_metric=${if_metric:-1}
|
||||
fi
|
||||
|
||||
if [ x$reason = xDEPREF6 ] ; then
|
||||
if [ x${new_ip6_prefixlen} = x ] ; then
|
||||
exit_with_hooks 2;
|
||||
fi
|
||||
# set default route
|
||||
for router in $new_routers; do
|
||||
${ip} -4 route add default via ${router} dev ${interface} \
|
||||
${if_metric:+metric $if_metric} >/dev/null 2>&1
|
||||
|
||||
${ip} -f inet6 addr change ${new_ip6_address}/${new_ip6_prefixlen} \
|
||||
dev ${interface} scope global preferred_lft 0
|
||||
if [ -n "$if_metric" ]; then
|
||||
if_metric=$((if_metric+1))
|
||||
fi
|
||||
done
|
||||
fi
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
# update /etc/resolv.conf
|
||||
make_resolv_conf
|
||||
else
|
||||
# flush all IPs from interface
|
||||
ip -4 addr flush dev ${interface}
|
||||
exit_with_hooks 2
|
||||
fi
|
||||
|
||||
if [ x$reason = xEXPIRE6 -o x$reason = xRELEASE6 -o x$reason = xSTOP6 ] ; then
|
||||
if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ] ; then
|
||||
exit_with_hooks 2;
|
||||
fi
|
||||
;;
|
||||
|
||||
${ip} -f inet6 addr del ${old_ip6_address}/${old_ip6_prefixlen} \
|
||||
dev ${interface}
|
||||
### DHCPv6 Handlers
|
||||
# TODO handle prefix change: ?based on ${old_ip6_prefix} and ${new_ip6_prefix}?
|
||||
|
||||
exit_with_hooks 0
|
||||
fi
|
||||
PREINIT6)
|
||||
# ensure interface is up
|
||||
${ip} link set ${interface} up
|
||||
|
||||
# We need to give the kernel some time to active interface
|
||||
interface_up_wait_time=5
|
||||
for i in $(seq 0 ${interface_up_wait_time})
|
||||
do
|
||||
ifconfig ${interface} | grep RUNNING >/dev/null 2>&1
|
||||
if [ $? -eq 0 ]; then
|
||||
break;
|
||||
fi
|
||||
sleep 1
|
||||
done
|
||||
|
||||
# flush any stale global permanent IPs from interface
|
||||
${ip} -6 addr flush dev ${interface} scope global permanent
|
||||
|
||||
# Wait for duplicate address detection for this interface if the
|
||||
# --dad-wait-time parameter has been specified and is greater than
|
||||
# zero.
|
||||
if [ ${dad_wait_time} -gt 0 ]; then
|
||||
# Check if any IPv6 address on this interface is marked as
|
||||
# tentative.
|
||||
${ip} addr show ${interface} | grep inet6 | grep tentative \
|
||||
&> /dev/null
|
||||
if [ $? -eq 0 ]; then
|
||||
# Wait for duplicate address detection to complete or for
|
||||
# the timeout specified as --dad-wait-time.
|
||||
for i in $(seq 0 $dad_wait_time)
|
||||
do
|
||||
# We're going to poll for the tentative flag every second.
|
||||
sleep 1
|
||||
${ip} addr show ${interface} | grep inet6 | grep tentative \
|
||||
&> /dev/null
|
||||
if [ $? -ne 0 ]; then
|
||||
break;
|
||||
fi
|
||||
done
|
||||
fi
|
||||
fi
|
||||
|
||||
;;
|
||||
|
||||
BOUND6|RENEW6|REBIND6)
|
||||
if [ "${new_ip6_address}" ] && [ "${new_ip6_prefixlen}" ]; then
|
||||
# set leased IP
|
||||
${ip} -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
|
||||
dev ${interface} scope global
|
||||
fi
|
||||
|
||||
# update /etc/resolv.conf
|
||||
if [ "${reason}" = BOUND6 ] ||
|
||||
[ "${new_dhcp6_name_servers}" != "${old_dhcp6_name_servers}" ] ||
|
||||
[ "${new_dhcp6_domain_search}" != "${old_dhcp6_domain_search}" ]; then
|
||||
make_resolv_conf
|
||||
fi
|
||||
|
||||
;;
|
||||
|
||||
DEPREF6)
|
||||
if [ -z "${cur_ip6_prefixlen}" ]; then
|
||||
exit_with_hooks 2
|
||||
fi
|
||||
|
||||
# set preferred lifetime of leased IP to 0
|
||||
${ip} -6 addr change ${cur_ip6_address}/${cur_ip6_prefixlen} \
|
||||
dev ${interface} scope global preferred_lft 0
|
||||
|
||||
;;
|
||||
|
||||
EXPIRE6|RELEASE6|STOP6)
|
||||
if [ -z "${old_ip6_address}" ] || [ -z "${old_ip6_prefixlen}" ]; then
|
||||
exit_with_hooks 2
|
||||
fi
|
||||
|
||||
# delete leased IP
|
||||
${ip} -6 addr del ${old_ip6_address}/${old_ip6_prefixlen} \
|
||||
dev ${interface}
|
||||
|
||||
;;
|
||||
esac
|
||||
|
||||
exit_with_hooks 0
|
||||
|
||||
Reference in New Issue
Block a user