openrc/net/ifconfig.sh.Linux.in
Robin H. Johnson 2569eb644e net/ifconfig, net/iproute2: admin/oper state check functions
Provide consistent methods using iproute2/ifconfig to check operational
and administrative up/down state of interfaces. This is not the same as
ethtool's "Link detected" field, which is the state of the layer 2
medium.

TODO: How to check operational state in BSD?

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
2011-12-12 19:20:39 -08:00

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# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.
ifconfig_depend()
{
program /sbin/ifconfig
provide interface
}
_up()
{
ifconfig "${IFACE}" up
}
_down()
{
ifconfig "${IFACE}" down
}
_exists()
{
grep -Eq "^[[:space:]]*${IFACE}:" /proc/net/dev
}
_ifindex()
{
local line= i=-2
while read line; do
: $(( i += 1 ))
[ ${i} -lt 1 ] && continue
case "${line}" in
"${IFACE}:"*) echo "${i}"; return 0;;
esac
done < /proc/net/dev
# Return the next available index
: $(( i += 1 ))
echo "${i}"
return 1
}
_is_wireless()
{
# Support new sysfs layout
[ -d /sys/class/net/"${IFACE}"/wireless -o \
-d /sys/class/net/"${IFACE}"/phy80211 ] && return 0
[ ! -e /proc/net/wireless ] && return 1
grep -Eq "^[[:space:]]*${IFACE}:" /proc/net/wireless
}
_set_flag()
{
ifconfig "${IFACE}" "$1"
}
_get_mac_address()
{
local mac=$(LC_ALL=C ifconfig "${IFACE}" | \
sed -n -e 's/.* \(HWaddr\|ether\) \(..:..:..:..:..:..\).*/\2/p')
case "${mac}" in
00:00:00:00:00:00);;
44:44:44:44:44:44);;
FF:FF:FF:FF:FF:FF);;
"");;
*) echo "${mac}"; return 0;;
esac
return 1
}
_set_mac_address()
{
ifconfig "${IFACE}" hw ether "$1"
}
_get_inet_address()
{
set -- $(LC_ALL=C ifconfig "${IFACE}" |
sed -n -e 's/.*\(inet addr:\|inet \)\([^ ]*\).*\(Mask:\|netmask \)\([^ ]*\).*/\2 \4/p')
[ -z "$1" ] && return 1
echo -n "$1"
shift
echo "/$(_netmask2cidr "$1")"
}
_get_inet_addresses()
{
local iface=${IFACE} i=0
local addrs="$(_get_inet_address)"
while true; do
local IFACE="${iface}:${i}"
_exists || break
local addr="$(_get_inet_address)"
[ -n "${addr}" ] && addrs="${addrs}${addrs:+ }${addr}"
: $(( i += 1 ))
done
echo "${addrs}"
}
_cidr2netmask()
{
local cidr="$1" netmask="" done=0 i=0 sum=0 cur=128
local octets= frac=
local octets=$(( cidr / 8 ))
local frac=$(( cidr % 8 ))
while [ ${octets} -gt 0 ]; do
netmask="${netmask}.255"
: $(( octets -= 1 ))
: $(( done += 1 ))
done
if [ ${done} -lt 4 ]; then
while [ ${i} -lt ${frac} ]; do
: $(( sum += cur ))
: $(( cur /= 2 ))
: $(( i += 1 ))
done
netmask="${netmask}.${sum}"
: $(( done += 1 ))
while [ ${done} -lt 4 ]; do
netmask="${netmask}.0"
: $(( done += 1 ))
done
fi
echo "${netmask#.*}"
}
_add_address()
{
if [ "$1" = "127.0.0.1/8" -a "${IFACE}" = "lo" ]; then
ifconfig "${IFACE}" "$@" 2>/dev/null
return 0
fi
case "$1" in
*:*) ifconfig "${IFACE}" inet6 add "$@"; return $?;;
esac
# IPv4 is tricky - ifconfig requires an aliased device
# for multiple addresses
local iface="${IFACE}"
if LC_ALL=C ifconfig "${iface}" | grep -Eq '\<inet (addr:)?.*'; then
# Get the last alias made for the interface and add 1 to it
i=$(ifconfig | sed '1!G;h;$!d' | grep -m 1 -o "^${iface}:[0-9]*" \
| sed -n -e 's/'"${iface}"'://p')
: $(( i = ${i:-0} + 1 ))
iface="${iface}:${i}"
fi
# ifconfig doesn't like CIDR addresses
local ip="${1%%/*}" cidr="${1##*/}" netmask=
if [ -n "${cidr}" -a "${cidr}" != "${ip}" ]; then
netmask="$(_cidr2netmask "${cidr}")"
shift
set -- "${ip}" netmask "${netmask}" "$@"
fi
local arg= cmd=
while [ -n "$1" ]; do
case "$1" in
brd)
if [ "$2" = "+" ]; then
shift
else
cmd="${cmd} broadcast"
fi
;;
peer) cmd="${cmd} pointopoint";;
*) cmd="${cmd} $1";;
esac
shift
done
ifconfig "${iface}" ${cmd}
}
_add_route()
{
local inet6= family=
if [ "$1" = "-A" -o "$1" = "-f" -o "$1" = "-family" ]; then
family="-A $2"
shift; shift
fi
if [ -n "${metric}" ]; then
set -- "$@" metric ${metric}
fi
if [ $# -eq 3 ]; then
set -- "$1" "$2" gw "$3"
elif [ "$3" = "via" ]; then
local one=$1 two=$2
shift; shift; shift
set -- "${one}" "${two}" gw "$@"
fi
case "$@" in
*:*) [ "$1" = "-net" ] && shift;;
esac
route ${family} add "$@" dev "${IFACE}"
}
_delete_addresses()
{
# We don't remove addresses from aliases
case "${IFACE}" in
*:*) return 0;;
esac
einfo "Removing addresses"
eindent
# iproute2 can add many addresses to an iface unlike ifconfig ...
# iproute2 added addresses cause problems for ifconfig
# as we delete an address, a new one appears, so we have to
# keep polling
while true; do
local addr=$(_get_inet_address)
[ -z "${addr}" ] && break
if [ "${addr}" = "127.0.0.1/8" ]; then
# Don't delete the loopback address
[ "${IFACE}" = "lo" -o "${IFACE}" = "lo0" ] && break
fi
einfo "${addr}"
ifconfig "${IFACE}" 0.0.0.0 || break
done
# Remove IPv6 addresses
local addr=
for addr in $(LC_ALL=C ifconfig "${IFACE}" | \
sed -n -e 's/^.*\(inet6 addr:\|inet6\) \([^ ]*\) .*\(Scope:[^L]\|scopeid [^<]*<[^l]\).*/\2/p'); do
if [ "${IFACE}" = "lo" ]; then
case "${addr}" in
"::1/128"|"/128") continue;;
esac
fi
einfo "${addr}"
ifconfig "${IFACE}" inet6 del "${addr}"
done
return 0
}
_has_carrier()
{
return 0
}
_tunnel()
{
iptunnel "$@"
}
ifconfig_pre_start()
{
local tunnel=
eval tunnel=\$iptunnel_${IFVAR}
if [ -n "${tunnel}" ]; then
# Set our base metric to 1000
metric=1000
ebegin "Creating tunnel ${IFVAR}"
iptunnel add ${tunnel}
eend $? || return 1
_up
fi
# MTU support
local mtu=
eval mtu=\$mtu_${IFVAR}
[ -n "${mtu}" ] && ifconfig "${IFACE}" mtu "${mtu}"
# TX Queue Length support
local len=
eval len=\$txqueuelen_${IFVAR}
[ -n "${len}" ] && ifconfig "${IFACE}" txqueuelen "${len}"
return 0
}
ifconfig_post_stop()
{
# Don't delete sit0 as it's a special tunnel
[ "${IFACE}" = "sit0" ] && return 0
[ -z "$(iptunnel show "${IFACE}" 2>/dev/null)" ] && return 0
ebegin "Destroying tunnel ${IFACE}"
iptunnel del "${IFACE}"
eend $?
}
# Is the interface administratively/operationally up?
# The 'UP' status in ifconfig/iproute2 is the administrative status
# Operational state is available in iproute2 output as 'state UP', or the
# operstate sysfs variable.
# 0: up
# 1: down
# 2: invalid arguments
is_admin_up()
{
local iface="$1"
[ -z "$iface" ] && iface="$IFACE"
ifconfig "${iface}" | \
sed -n '1,1{ /flags=.*[<,]UP[,>]/{ q 0 }}; q 1; '
}
is_oper_up()
{
local iface="$1"
[ -z "$iface" ] && iface="$IFACE"
read state </sys/class/net/"${iface}"/operstate
[ "x$state" = "up" ]
}