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|
#!/bin/ash
. /etc/nvram.sh
alias debug=${DEBUG:-:}
# valid interface?
if_valid () (
ifconfig "$1" >&- 2>&- ||
[ "${1%%[0-9]}" = "br" ] ||
{
[ "${1%%[0-9]}" = "vlan" ] && (
i=${1#vlan}
hwname=$(nvram get vlan${i}hwname)
hwaddr=$(nvram get ${hwname}macaddr)
[ -z "$hwaddr" ] && return 1
vif=$(ifconfig -a | awk '/^eth.*'$hwaddr'/ {print $1; exit}' IGNORECASE=1)
debug "# vlan$i => $vif"
$DEBUG ifconfig $vif up
$DEBUG vconfig add $vif $i 2>&-
)
} ||
{ debug "# missing interface '$1' ignored"; false; }
)
do_ifup() {
if_proto=$(nvram get ${2}_proto)
if=$(nvram get ${2}_ifname)
[ "${if%%[0-9]}" = "ppp" ] && if=$(nvram get ${if_proto}_ifname)
pidfile=/var/run/${if}.pid
[ -f $pidfile ] && $DEBUG kill $(cat $pidfile)
case "$1" in
static)
ip=$(nvram get ${2}_ipaddr)
netmask=$(nvram get ${2}_netmask)
gateway=$(nvram get ${2}_gateway)
$DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} broadcast + up
${gateway:+$DEBUG route add default gw $gateway}
[ -f /etc/resolv.conf ] || {
debug "# --- creating /etc/resolv.conf ---"
for dns in $(nvram get ${2}_dns); do
echo "nameserver $dns" >> /etc/resolv.conf
done
}
env -i ACTION="ifup" INTERFACE="${2}" PROTO=static /sbin/hotplug "iface" &
;;
dhcp)
DHCP_IP=$(nvram get ${2}_ipaddr)
DHCP_NETMASK=$(nvram get ${2}_netmask)
$DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} broadcast + up
DHCP_ARGS="-i $if ${DHCP_IP:+-r $DHCP_IP} -b -p $pidfile"
DHCP_HOSTNAME=$(nvram get ${2}_hostname)
DHCP_HOSTNAME=${DHCP_HOSTNAME%%.*}
[ -z $DHCP_HOSTNAME ] || DHCP_ARGS="$DHCP_ARGS -H $DHCP_HOSTNAME"
[ "$if_proto" = "pptp" ] && DHCP_ARGS="$DHCP_ARGS -n -q" || DHCP_ARGS="$DHCP_ARGS -R &"
oldpid=$(cat $pidfile)
${DEBUG:-eval} "udhcpc $DHCP_ARGS"
pidof udhcpc | grep "$oldpid" >&- 2>&- && {
sleep 1
kill -9 $oldpid
}
# hotplug events are handled by /usr/share/udhcpc/default.script
;;
none|"")
;;
*)
[ -x "/sbin/ifup.$1" ] && { $DEBUG /sbin/ifup.$1 ${2}; exit; }
echo "### ifup ${2}: ignored ${2}_proto=\"$1\" (not supported)"
;;
esac
}
bitcount () {
local c=$1
echo $((
c=((c>> 1)&0x55555555)+(c&0x55555555),
c=((c>> 2)&0x33333333)+(c&0x33333333),
c=((c>> 4)&0x0f0f0f0f)+(c&0x0f0f0f0f),
c=((c>> 8)&0x00ff00ff)+(c&0x00ff00ff),
c=((c>>16)&0x0000ffff)+(c&0x0000ffff)
))
}
valid_netmask () {
return $((-($1)&~$1))
}
ip2int () (
set $(echo $1 | tr '\.' ' ')
echo $(($1<<24|$2<<16|$3<<8|$4))
)
int2ip () {
echo $(($1>>24&255)).$(($1>>16&255)).$(($1>>8&255)).$(($1&255))
}
|
