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#!/bin/sh
# Update DNS information for DHCPv6 clients
# should be used only if vyos-hostsd is running
if /usr/bin/systemctl -q is-active vyos-hostsd; then
hostsd_client="/usr/bin/vyos-hostsd-client"
hostsd_changes=
if [ -n "$new_domain_name" ]; then
logmsg info "Deleting search domains with tag \"dhcpv6-{{ ifname }}\" via vyos-hostsd-client"
$hostsd_client --delete-search-domains --tag "dhcpv6-{{ ifname }}"
logmsg info "Adding domain name \"$new_domain_name\" as search domain with tag \"dhcpv6-{{ ifname }}\" via vyos-hostsd-client"
$hostsd_client --add-search-domains "$new_domain_name" --tag "dhcpv6-{{ ifname }}"
hostsd_changes=y
fi
if [ -n "$new_domain_name_servers" ]; then
logmsg info "Deleting nameservers with tag \"dhcpv6-{{ ifname }}\" via vyos-hostsd-client"
$hostsd_client --delete-name-servers --tag "dhcpv6-{{ ifname }}"
logmsg info "Adding nameservers \"$new_domain_name_servers\" with tag \"dhcpv6-{{ ifname }}\" via vyos-hostsd-client"
$hostsd_client --add-name-servers $new_domain_name_servers --tag "dhcpv6-{{ ifname }}"
hostsd_changes=y
fi
if [ $hostsd_changes ]; then
logmsg info "Applying changes via vyos-hostsd-client"
$hostsd_client --apply
else
logmsg info "No changes to apply via vyos-hostsd-client"
fi
fi
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