## Set an IP sysctl.
setopt () {
set -e
- opt=$1; shift; val=$*
- run sysctl -q net/ipv4/$opt="$val"
+ opt=$1 val=$2
+ any=nil
+ for ver in ipv4 ipv6; do
+ if [ -f /proc/sys/net/$ver/$opt ]; then
+ run sysctl -q net/$ver/$opt="$val"
+ any=t
+ fi
+ done
+ case $any in
+ nil) echo >&2 "$0: unknown IP option $opt"; exit 1 ;;
+ esac
}
-## setdevopt OPTION VALUE
+## setdevopt OPTION VALUE [INTERFACES ...]
##
## Set an IP interface-level sysctl.
setdevopt () {
set -e
- opt=$1; shift; val=$*
- for i in /proc/sys/net/ipv4/conf/*; do
- [ -f $i/$opt ] &&
- run sysctl -q net/ipv4/conf/${i#/proc/sys/net/ipv4/conf/}/$opt="$val"
+ opt=$1 val=$2; shift 2
+ case "$#,$1" in
+ 0, | 1,all)
+ set -- $(
+ seen=:
+ for ver in ipv4 ipv6; do
+ cd /proc/sys/net/$ver/conf
+ for i in *; do
+ [ -f $i/$opt ] || continue
+ case "$seen" in (*:$i:*) continue ;; esac
+ echo $i
+ done
+ done)
+ ;;
+ esac
+ for i in "$@"; do
+ any=nil
+ for ver in ipv4 ipv6; do
+ if [ -f /proc/sys/net/$ver/conf/$i/$opt ]; then
+ any=t
+ run sysctl -q net/ipv4/conf/$i/$opt="$val"
+ fi
+ done
+ case $any in
+ nil) echo >&2 "$0: unknown device option $opt"; exit 1 ;;
+ esac
done
}