openrc/init.d/network.in

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#!@PREFIX@/sbin/runscript
# Copyright 2009 Roy Marples <roy@marples.name>
# All rights reserved. Released under the 2-clause BSD license.
# This script was inspired by the equivalent rc.d network from NetBSD.
description="Configures network interfaces."
__nl="
"
depend()
{
need localmount
after bootmisc
provide net
# We don't want to stop the network at shutdown
keyword noshutdown
keyword nojail noprefix novserver
}
uniqify()
{
local result= i=
for i; do
case " $result " in
*" $i "*);;
*) result="$result $i";;
esac
done
echo "${result# *}"
}
reverse()
{
local result= i=
for i; do
result="$i $result"
done
echo "${result# *}"
}
sys_interfaces()
{
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case "$RC_UNAME" in
Linux)
local w= rest= i= cmd=$1
while read w rest; do
i=${w%%:*}
[ "$i" != "$w" ] || continue
if [ "$cmd" = u ]; then
ifconfig "$i" | grep -q "[ ]*UP" || continue
fi
printf "%s " "$i"
done </proc/net/dev
;;
*)
ifconfig -l$1
;;
esac
}
auto_interfaces()
{
local ifs= c= f=
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case "$RC_UNAME" in
NetBSD)
for c in $(ifconfig -C 2>/dev/null); do
for f in /etc/ifconfig.${c}[0-9]*; do
[ -f "$f" ] && printf "%s" "$f{##*.} "
done
done
;;
*)
for f in /etc/ifconfig.*; do
[ -f "$f" ] && printf "%s" "${f##*.} "
done
for f in /etc/ip.*; do
[ -f "$f" ] && printf "%s" "${f##*.} "
done
;;
esac
echo
}
interfaces()
{
uniqify $(sys_interfaces "$@") $interfaces $(auto_interfaces)
}
dumpargs()
{
local f="$1"
shift
case "$@" in
'') [ -f "$f" ] && cat "$f";;
*"$__nl"*) echo "$@";;
*)
(
set -o noglob
IFS=';'; set -- $@
IFS="$__nl"; echo "$*"
);;
esac
}
runip()
{
local int="$1" err=
shift
err=$(LC_ALL=C ip address add "$@" dev "$int" 2>&1)
[ -z "$err" ] && return 0
if [ "$err" = "RTNETLINK answers: File exists" ]; then
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ip address del "$@" dev "$int" 2>/dev/null
fi
# Localise the error
ip address add "$@" dev "$int"
}
routeflush()
{
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if [ "$RC_UNAME" = Linux ]; then
if [ -x /sbin/ip ]; then
ip route flush scope global
else
# Sadly we also delete some link routes, but
# this cannot be helped
local dest= gate= net= flags= rest=
route -n | while read dest gate net flags rest; do
[ -z "$net" ] && continue
case "$dest" in
[0-9]*) ;;
*) continue;;
esac
local xtra= netmask="netmask $net"
case "$flags" in
U) continue;;
*H*) flags=-host; netmask=;;
*!*) flags=-net; xtra=reject;;
*) flags=-net;;
esac
route del $flags $dest $netmask $xtra
done
fi
else
route -qn flush
fi
}
runargs()
{
dumpargs "$@" | while read -r args; do
case "$args" in
''|"#"*) ;;
*)
(
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eval vebegin "${args#*!}"
eval "${args#*!}"
veend $?
);;
esac
done
}
start()
{
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local cr=0 r= int= intv= cmd= args= upcmd=
einfo "Starting network"
routeflush
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if [ "$RC_UNAME" = "Linux" ]; then
ifconfig lo 127.0.0.1 netmask 255.0.0.0 || cr=1
route add -net 127.0.0.0 netmask 255.0.0.0 \
gw 127.0.0.1 2>/dev/null
route add -net 127.0.0.0 netmask 255.0.0.0 \
gw 127.0.0.1 reject 2>/dev/null
else
ifconfig lo0 127.0.0.1 netmask 255.0.0.0 || cr=1
route -q add -inet 127.0.0.0 -netmask 255.0.0.0 \
127.0.0.1 -reject || cr=1
fi
eindent
for int in $(interfaces); do
local func= cf=
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intv=$(shell_var "$int")
eval upcmd=\$ifup_$intv
for func in ip ifconfig; do
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eval cmd=\$${func}_$intv
if [ -n "$cmd" -o -f /etc/"$func.$int" ]; then
cf=/etc/"$func.$int"
break
fi
done
[ -n "$cf" -o -n "$upcmd" -o \
-f /etc/ifup."$int" -o -f "$cf" ] || continue
veinfo "$int"
case "$func" in
ip) func=runip;;
esac
eindent
runargs /etc/ifup."$int" "$upcmd"
r=0
dumpargs "$cf" "$cmd" | while read -r args; do
case "$args" in
''|"#"*) ;;
"!"*)
(
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eval vebegin "${args#*!}"
eval "${args#*!}"
veend $?
);;
*)
(
set -o noglob
eval set -- "$args"
vebegin "$@"
$func "$int" "$@"
veend $?
);;
esac
done
eoutdent
done
eoutdent
eend $cr
if [ -n "$defaultroute" ]; then
ebegin "Setting default route $defaultroute"
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if [ "$RC_UNAME" = Linux ]; then
route add default gw $defaultroute
else
route add default $defaultroute
fi
eend $?
fi
return 0
}
stop()
{
local int= intv= cmd= downcmd= r=
einfo "Stopping network"
routeflush
eindent
for int in $(reverse $(interfaces u)); do
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intv=$(shell_var "$int")
eval downcmd=\$ifdown_$intv
eval cmd=\$ip_$intv
[ -z "$cmd" ] && eval cmd=\$ifconfig_$intv
if [ -n "$cmd" -o -f /etc/ip."$int" -o \
-f /etc/ifconfig."$int" -o \
-n "$downcmd" -o -f /etc/ifdown."$int" ];
then
veinfo "$int"
runargs /etc/ifdown."$int" "$downcmd"
ifconfig "$int" down 2>/dev/null
ifconfig "$int" destroy 2>/dev/null
fi
done
eoutdent
eend 0
}