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|
#!@SHELL@
# busybox udhcp setup script
# shellcheck shell=sh disable=SC1008
PATH=/bin:/usr/bin:/sbin:/usr/sbin
peer_var()
{
[ -n "$1" ] && [ "$1" != "yes" ]
}
update_dns()
{
peer_var "${PEER_DNS}" && return
[ -z "${domain}" ] && [ -z "${dns}" ] && return
conf="# Generated by udhcpc for ${interface}\n"
[ -n "${domain}" ] && conf="${conf}domain ${domain}\n"
for i in ${dns} ; do
conf="${conf}nameserver ${i}\n"
done
if command -v resolvconf >/dev/null; then
printf "${conf}" | resolvconf -a ${interface}
else
printf "${conf}" > /etc/resolv.conf
chmod 644 /etc/resolv.conf
fi
}
update_ntp()
{
peer_var "${PEER_NTP}" && return
[ -z "${ntpsrv}" ] && return
conf="# Generated by udhcpc for interface ${interface}\n"
conf="${conf}restrict default noquery notrust nomodify\n"
conf="${conf}restrict 127.0.0.1\n"
for i in ${ntpsrv} ; do
conf="${conf}restrict ${i} nomodify notrap noquery\n"
conf="${conf}server ${i}\n"
done
conf="${conf}driftfile /var/lib/ntp/ntp.drift\n"
conf="${conf}logfile /var/log/ntp.log\n"
printf "${conf}" > /etc/ntp.conf
chmod 644 /etc/ntp.conf
}
update_hostname()
{
peer_var "${PEER_HOSTNAME}" && return
[ -z "${hostname}" ] && return
myhost="$(hostname)"
[ -z "${myhost}" ] || [ "${myhost}" = "(none)" ] && hostname "${hostname}"
}
update_interface()
{
[ -n "${broadcast}" ] && broadcast="broadcast ${broadcast}"
[ -n "${subnet}" ] && netmask="netmask ${subnet}"
[ -n "${mtu}" ] && mtu="mtu ${mtu}"
ifconfig "${interface}" ${ip} ${broadcast} ${netmask} ${mtu}
}
update_classless_routes()
{
if [ -n "${staticroutes}" ] ; then
max_routes=128
metric=
[ -n "${IF_METRIC}" ] && metric="metric ${IF_METRIC}"
while [ -n "$1" ] && [ -n "$2" ] && [ $max_routes -gt 0 ]; do
gw_arg=
if [ "$2" != '0.0.0.0' ]; then
gw_arg="gw $2"
fi
[ ${1##*/} -eq 32 ] && type=host || type=net
route add -$type "$1" ${gw_arg} ${metric} dev "${interface}"
max=$((max-1))
shift 2
done
fi
}
update_routes()
{
peer_var "${PEER_ROUTERS}" && return
# RFC 3442
[ -n "${staticroutes}" ] && update_classless_routes $staticroutes
# If the DHCP server returns both a Classless Static Routes option and
# a Router option, the DHCP client MUST ignore the Router option.
if [ -n "${router}" ] && [ -z "${staticroutes}" ] ; then
metric=
[ -n "${IF_METRIC}" ] && metric="metric ${IF_METRIC}"
for i in ${router} ; do
route add default gw "${i}" ${metric} dev "${interface}"
done
fi
}
deconfig()
{
ifconfig "${interface}" 0.0.0.0
if ! peer_var "${PEER_ROUTERS}" ; then
while route del default dev "${interface}" >/dev/null 2>&1; do
:
done
fi
if ! peer_var "${PEER_DNS}" ; then
command -v resolvconf >/dev/null && resolvconf -d "${interface}"
fi
}
if [ -r "/run/udhcpc-${interface}.conf" ]; then
# shellcheck disable=SC1090
. "/run/udhcpc-${interface}.conf"
fi
case "$1" in
bound|renew)
update_hostname
update_interface
update_routes
update_dns
update_ntp
;;
deconfig|leasefail)
deconfig
;;
nak)
echo "nak: ${message}"
;;
*)
echo "unknown option $1" >&2
echo "Usage: $0 {bound|deconfig|leasefail|nak|renew}" >&2
exit 1
;;
esac
exit 0
|
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