etc-gentoo/init.d/net.lo

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Executable File

#!/sbin/runscript
# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.
MODULESDIR="/lib/netifrc/net"
MODULESLIST="${RC_SVCDIR}/nettree"
_config_vars="config routes"
[ -z "${IN_BACKGROUND}" ] && IN_BACKGROUND="NO"
description="Configures network interfaces."
# Handy var so we don't have to embed new lines everywhere for array splitting
__IFS="
"
depend()
{
local IFACE=${RC_SVCNAME#*.}
local IFVAR=$(shell_var "${IFACE}")
need localmount
if [ "$RC_UNAME" = Linux -a "$IFACE" != lo ]; then
need sysfs
fi
after bootmisc
keyword -jail -prefix -vserver
case "${IFACE}" in
lo|lo0) ;;
*)
after net.lo net.lo0 dbus
provide net
;;
esac
if [ "$(command -v "depend_${IFVAR}")" = "depend_${IFVAR}" ]; then
depend_${IFVAR}
fi
local dep= prov=
for dep in need use before after provide keyword; do
eval prov=\$rc_${dep}_${IFVAR}
if [ -n "${prov}" ]; then
${dep} ${prov}
ewarn "rc_${dep}_${IFVAR} is deprecated."
ewarn "Please use rc_net_${IFVAR}_${dep} instead."
fi
done
}
# Support bash arrays - sigh
_array_helper()
{
local _a=
eval _a=\$$1
_a=$(echo "${_a}" | sed -e 's:^[[:space:]]*::' -e 's:[[:space:]]*$::' -e '/^$/d' -e 's:[[:space:]]\{1,\}: :g')
[ -n "${_a}" ] && printf "%s\n" "${_a}"
}
_get_array()
{
local _a=
if [ -n "${BASH}" ]; then
case "$(declare -p "$1" 2>/dev/null)" in
"declare -a "*)
ewarn "You are using a bash array for $1."
ewarn "This feature will be removed in the future."
ewarn "Please see net.example for the correct format for $1."
eval "set -- \"\${$1[@]}\""
for _a; do
printf "%s\n" "${_a}"
done
return 0
;;
esac
fi
_array_helper $1
}
# Flatten bash arrays to simple strings
_flatten_array()
{
if [ -n "${BASH}" ]; then
case "$(declare -p "$1" 2>/dev/null)" in
"declare -a "*)
ewarn "You are using a bash array for $1."
ewarn "This feature will be removed in the future."
ewarn "Please see net.example for the correct format for $1."
eval "set -- \"\${$1[@]}\""
for x; do
printf "'%s' " "$(printf "$x" | sed "s:':'\\\'':g")"
done
return 0
;;
esac
fi
_array_helper $1
}
_wait_for_carrier()
{
local timeout= efunc=einfon
_has_carrier && return 0
eval timeout=\$carrier_timeout_${IFVAR}
timeout=${timeout:-${carrier_timeout:-0}}
# Incase users don't want this nice feature ...
[ ${timeout} -le 0 ] && return 0
yesno ${RC_PARALLEL} && efunc=einfo
${efunc} "Waiting for carrier (${timeout} seconds) "
while [ ${timeout} -gt 0 ]; do
if _has_carrier; then
[ "${efunc}" = "einfon" ] && echo
eend 0
return 0
fi
sleep 1
: $(( timeout -= 1 ))
[ "${efunc}" = "einfon" ] && printf "."
done
[ "${efunc}" = "einfon" ] && echo
eend 1
return 1
}
_netmask2cidr()
{
# Some shells cannot handle hex arithmetic, so we massage it slightly
# Buggy shells include FreeBSD sh, dash and busybox.
# bash and NetBSD sh don't need this.
case $1 in
0x*)
local hex=${1#0x*} quad=
while [ -n "${hex}" ]; do
local lastbut2=${hex#??*}
quad=${quad}${quad:+.}0x${hex%${lastbut2}*}
hex=${lastbut2}
done
set -- ${quad}
;;
esac
local i= len=
local IFS=.
for i in $1; do
case $i in
0x*) i=$((i)) ;;
esac
while [ ${i} -ne 0 ]; do
: $(( len += i % 2 ))
: $(( i >>= 1 ))
done
done
echo "${len}"
}
_configure_variables()
{
local var= v= t=
for var in ${_config_vars}; do
local v=
for t; do
eval v=\$${var}_${t}
if [ -n "${v}" ]; then
eval ${var}_${IFVAR}=\$${var}_${t}
continue 2
fi
done
done
}
_which()
{
local i OIFS
# Empty
[ -z "$1" ] && return
# check paths
OIFS="$IFS"
IFS=:
for i in $PATH ; do
[ -x $i/$1 ] && echo $i/$1 && break
done
IFS=$OIFS
}
# Like _which, but also consider shell builtins, and multiple alternatives
_program_available()
{
[ -z "$1" ] && return 0
local x=
for x; do
case "${x}" in
/*) [ -x "${x}" ] && break;;
*) type "${x}" >/dev/null 2>&1 && break;;
esac
unset x
done
[ -n "${x}" ] && echo $x && return 0
return 1
}
_show_address()
{
einfo "received address $(_get_inet_address "${IFACE}")"
}
# Basically sorts our modules into order and saves the list
_gen_module_list()
{
local x= f= force=$1
if ! ${force} && [ -s "${MODULESLIST}" -a "${MODULESLIST}" -nt "${MODULESDIR}" ]; then
local update=false
for x in "${MODULESDIR}"/*.sh; do
[ -e "${x}" ] || continue
if [ "${x}" -nt "${MODULESLIST}" ]; then
update=true
break
fi
done
${update} || return 0
fi
einfo "Caching network module dependencies"
# Run in a subshell to protect the main script
(
after() {
eval ${MODULE}_after="\"\${${MODULE}_after}\${${MODULE}_after:+ }$*\""
}
before() {
local mod=${MODULE}
local MODULE=
for MODULE; do
after "${mod}"
done
}
program() {
if [ "$1" = "start" -o "$1" = "stop" ]; then
local s="$1"
shift
eval ${MODULE}_program_${s}="\"\${${MODULE}_program_${s}}\${${MODULE}_program_${s}:+ }$*\""
else
eval ${MODULE}_program="\"\${${MODULE}_program}\${${MODULE}_program:+ }$*\""
fi
}
provide() {
eval ${MODULE}_provide="\"\${${MODULE}_provide}\${${MODULE}_provide:+ }$*\""
local x
for x in $*; do
eval ${x}_providedby="\"\${${MODULE}_providedby}\${${MODULE}_providedby:+ }${MODULE}\""
done
}
for MODULE in "${MODULESDIR}"/*.sh; do
sh -n "${MODULE}" || continue
. "${MODULE}" || continue
MODULE=${MODULE#${MODULESDIR}/}
MODULE=${MODULE%.sh}
eval ${MODULE}_depend
MODULES="${MODULES} ${MODULE}"
done
VISITED=
SORTED=
visit() {
case " ${VISITED} " in
*" $1 "*) return;;
esac
VISITED="${VISITED} $1"
eval AFTER=\$${1}_after
for MODULE in ${AFTER}; do
eval PROVIDEDBY=\$${MODULE}_providedby
if [ -n "${PROVIDEDBY}" ]; then
for MODULE in ${PROVIDEDBY}; do
visit "${MODULE}"
done
else
visit "${MODULE}"
fi
done
eval PROVIDE=\$${1}_provide
for MODULE in ${PROVIDE}; do
visit "${MODULE}"
done
eval PROVIDEDBY=\$${1}_providedby
[ -z "${PROVIDEDBY}" ] && SORTED="${SORTED} $1"
}
for MODULE in ${MODULES}; do
visit "${MODULE}"
done
printf "" > "${MODULESLIST}"
i=0
for MODULE in ${SORTED}; do
eval PROGRAM=\$${MODULE}_program
eval PROGRAM_START=\$${MODULE}_program_start
eval PROGRAM_STOP=\$${MODULE}_program_stop
eval PROVIDE=\$${MODULE}_provide
echo "module_${i}='${MODULE}'" >> "${MODULESLIST}"
echo "module_${i}_program='${PROGRAM}'" >> "${MODULESLIST}"
echo "module_${i}_program_start='${PROGRAM_START}'" >> "${MODULESLIST}"
echo "module_${i}_program_stop='${PROGRAM_STOP}'" >> "${MODULESLIST}"
echo "module_${i}_provide='${PROVIDE}'" >> "${MODULESLIST}"
: $(( i += 1 ))
done
echo "module_${i}=" >> "${MODULESLIST}"
)
return 0
}
_load_modules()
{
local starting=$1 mymods=
# Ensure our list is up to date
_gen_module_list false
if ! . "${MODULESLIST}"; then
_gen_module_list true
. "${MODULESLIST}"
fi
MODULES=
if [ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
eval mymods=\$modules_${IFVAR}
[ -z "${mymods}" ] && mymods=${modules}
fi
local i=-1 x= mod= f= provides=
while true; do
: $(( i += 1 ))
eval mod=\$module_${i}
[ -z "${mod}" ] && break
[ -e "${MODULESDIR}/${mod}.sh" ] || continue
eval set -- \$module_${i}_program
if [ -n "$1" ]; then
if ! _program_available "$@" >/dev/null; then
vewarn "Skipping module $mod due to missing program: $@"
continue
fi
fi
if ${starting}; then
eval set -- \$module_${i}_program_start
else
eval set -- \$module_${i}_program_stop
fi
if [ -n "$1" ]; then
if ! _program_available "$@" >/dev/null; then
vewarn "Skipping module $mod due to missing program: $@"
continue
fi
fi
eval provides=\$module_${i}_provide
if ${starting}; then
case " ${mymods} " in
*" !${mod} "*) continue;;
*" !${provides} "*) [ -n "${provides}" ] && continue;;
esac
fi
MODULES="${MODULES}${MODULES:+ }${mod}"
# Now load and wrap our functions
if ! . "${MODULESDIR}/${mod}.sh"; then
eend 1 "${RC_SVCNAME}: error loading module \`${mod}'"
exit 1
fi
[ -z "${provides}" ] && continue
# Wrap our provides
local f=
for f in pre_start start post_start; do
eval "${provides}_${f}() { [ "$(command -v "${mod}_${f}")" = "${mod}_${f}" ] || return 0; ${mod}_${f} \"\$@\"; }"
done
eval module_${mod}_provides="${provides}"
eval module_${provides}_providedby="${mod}"
done
# Wrap our preferred modules
for mod in ${mymods}; do
case " ${MODULES} " in
*" ${mod} "*)
eval x=\$module_${mod}_provides
[ -z "${x}" ] && continue
for f in pre_start start post_start; do
eval "${x}_${f}() { [ "$(command -v "${mod}_${f}")" = "${mod}_${f}" ] || return 0; ${mod}_${f} \"\$@\"; }"
done
eval module_${x}_providedby="${mod}"
;;
esac
done
# Finally remove any duplicated provides from our list if we're starting
# Otherwise reverse the list
local LIST="${MODULES}" p=
MODULES=
if ${starting}; then
for mod in ${LIST}; do
eval x=\$module_${mod}_provides
if [ -n "${x}" ]; then
eval p=\$module_${x}_providedby
[ "${mod}" != "${p}" ] && continue
fi
MODULES="${MODULES}${MODULES:+ }${mod}"
done
else
for mod in ${LIST}; do
MODULES="${mod}${MODULES:+ }${MODULES}"
done
fi
veinfo "Loaded modules: ${MODULES}"
}
_load_config()
{
local config="$(_get_array "config_${IFVAR}")"
local fallback="$(_get_array fallback_${IFVAR})"
config_index=0
local IFS="$__IFS"
set -- ${config}
# We should support a space separated array for cidr configs
# But only as long as they do not contain other parameters for the address
if [ $# = 1 ]; then
unset IFS
set -- ${config}
# Of course, we may have a single address added old style.
# If the NEXT argument is a v4 or v6 address, it's the next config.
# Otherwise, it's arguments to the first config...
if [ "${2#*.*}" = "${2}" -a "${2#*:*}" = "${2}" ]; then
# Not an IPv4/IPv6
local IFS="$__IFS"
set -- ${config}
fi
fi
# Ensure that loopback has the correct address
if [ "${IFACE}" = "lo" -o "${IFACE}" = "lo0" ]; then
if [ "$1" != "null" ]; then
config_0="127.0.0.1/8"
config_index=1
fi
else
if [ -z "$1" ]; then
ewarn "config_${IFVAR} not specified; defaulting to DHCP"
config_0="dhcp"
config_index=1
fi
fi
# We store our config in an array like vars
# so modules can influence it
for cmd; do
eval config_${config_index}="'${cmd}'"
: $(( config_index += 1 ))
done
# Terminate the list
eval config_${config_index}=
config_index=0
for cmd in ${fallback}; do
eval fallback_${config_index}="'${cmd}'"
: $(( config_index += 1 ))
done
# Terminate the list
eval fallback_${config_index}=
# Don't set to zero, so any net modules don't have to do anything extra
config_index=-1
}
# Support functions
_run_if()
{
local cmd=$1 iface=$2 ifr=${IFACE} ifv=${IFVAR}
# Ensure that we don't stamp on real values
local IFACE= IFVAR=
shift
if [ -n "${iface}" ]; then
IFACE="${iface}"
[ "${iface}" != "${ifr}" ] && IFVAR=$(shell_var "${IFACE}")
else
IFACE=${ifr}
IFVAR=${ifv}
fi
${cmd}
}
interface_exists()
{
_run_if _exists "$@"
}
interface_up()
{
_run_if _up "$@"
}
interface_down()
{
_run_if _down "$@"
}
start()
{
local IFACE=${RC_SVCNAME#*.} oneworked=false fallback=false module=
local IFVAR=$(shell_var "${IFACE}") cmd= our_metric=
local metric=0 _up_before_preup
eval _up_before_preup="\$up_before_preup_${IFVAR}"
[ -z "${_up_before_preup}" ] && _up_before_preup=$up_before_preup
einfo "Bringing up interface ${IFACE}"
eindent
if [ -z "${MODULES}" ]; then
local MODULES=
_load_modules true
fi
# We up the iface twice if we have a preup to ensure it's up if
# available in preup and afterwards incase the user inadvertently
# brings it down
if [ "$(command -v preup)" = "preup" ]; then
yesno "${_up_before_preup:-yes}" && _up 2>/dev/null
ebegin "Running preup"
eindent
preup || return 1
eoutdent
fi
_up 2>/dev/null
for module in ${MODULES}; do
if [ "$(command -v "${module}_pre_start")" = "${module}_pre_start" ]; then
${module}_pre_start || exit $?
fi
done
if ! _exists; then
eerror "ERROR: interface ${IFACE} does not exist"
eerror "Ensure that you have loaded the correct kernel module for your hardware"
return 1
fi
if ! _wait_for_carrier; then
if service_started devd; then
ewarn "no carrier, but devd will start us when we have one"
mark_service_inactive "${RC_SVCNAME}"
else
eerror "no carrier"
fi
return 1
fi
local config= config_index=
_load_config
config_index=0
eval our_metric=\$metric_${IFVAR}
if [ -n "${our_metric}" ]; then
metric=${our_metric}
elif [ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
: $(( metric += $(_ifindex) ))
fi
while true; do
eval config=\$config_${config_index}
[ -z "${config}" ] && break
set -- ${config}
if [ "$1" != "null" -a "$1" != "noop" ]; then
ebegin "$1"
fi
eindent
case "$1" in
noop)
if [ -n "$(_get_inet_address)" ]; then
oneworked=true
break
fi
;;
null) :;;
[0-9]*|*:*) _add_address ${config};;
*)
if [ "$(command -v "${config}_start")" = "${config}_start" ]; then
"${config}"_start
else
eerror "nothing provides \`${config}'"
fi
;;
esac
if eend $?; then
oneworked=true
else
eval config=\$fallback_${config_index}
if [ -n "${config}" ]; then
fallback=true
eoutdent
ewarn "Trying fallback configuration ${config}"
eindent
eval config_${config_index}=\$config
unset fallback_${config_index}
: $(( config_index -= 1 ))
fi
fi
eoutdent
: $(( config_index += 1 ))
done
if ! ${oneworked}; then
if [ "$(command -v failup)" = "failup" ]; then
ebegin "Running failup"
eindent
failup
eoutdent
fi
return 1
fi
local hideFirstroute=false first=true routes=
if ${fallback}; then
routes="$(_get_array "fallback_routes_${IFVAR}")"
fi
if [ -z "${routes}" ]; then
routes="$(_get_array "routes_${IFVAR}")"
fi
if [ "${IFACE}" = "lo" -o "${IFACE}" = "lo0" ]; then
if [ "${config_0}" != "null" ]; then
routes="127.0.0.0/8 via 127.0.0.1
${routes}"
hideFirstroute=true
fi
fi
local OIFS="${IFS}" SIFS="${IFS-y}"
local IFS="$__IFS"
local fam
for cmd in ${routes}; do
unset IFS
if ${first}; then
first=false
einfo "Adding routes"
fi
case ${cmd} in
-6" "*) fam="-6"; cmd=${cmd#-6 };;
-4" "*) fam="-4"; cmd=${cmd#-4 };;
esac
eindent
ebegin ${cmd}
# Work out if we're a host or a net if not told
case ${cmd} in
-net" "*|-host" "*);;
*" "netmask" "*) cmd="-net ${cmd}";;
*.*.*.*/32*) cmd="-host ${cmd}";;
*.*.*.*/*|0.0.0.0|0.0.0.0" "*) cmd="-net ${cmd}";;
default|default" "*) cmd="-net ${cmd}";;
*:*/128*) cmd="-host ${cmd}";;
*:*/*) cmd="-net ${cmd}";;
*) cmd="-host ${cmd}";;
esac
if ${hideFirstroute}; then
_add_route ${fam} ${cmd} >/dev/null 2>&1
hideFirstroute=false
else
_add_route ${fam} ${cmd} >/dev/null
fi
eend $?
eoutdent
done
if [ "${SIFS}" = "y" ]; then
unset IFS
else
IFS="${OIFS}"
fi
for module in ${MODULES}; do
if [ "$(command -v "${module}_post_start")" = "${module}_post_start" ]; then
${module}_post_start || exit $?
fi
done
if [ "$(command -v postup)" = "postup" ]; then
ebegin "Running postup"
eindent
postup
eoutdent
fi
return 0
}
stop()
{
# Don't stop the network at shutdown.
# We don't use the noshutdown keyword so that we are started again
# correctly if we go back to multiuser.
yesno ${keep_network:-YES} && yesno $RC_GOINGDOWN && return 0
local IFACE=${RC_SVCNAME#*.} module=
local IFVAR=$(shell_var "${IFACE}") opts=
einfo "Bringing down interface ${IFACE}"
eindent
if [ -z "${MODULES}" ]; then
local MODULES=
_load_modules false
fi
if [ "$(command -v predown)" = "predown" ]; then
ebegin "Running predown"
eindent
predown || return 1
eoutdent
else
if is_net_fs /; then
eerror "root filesystem is network mounted -- can't stop ${IFACE}"
return 1
fi
fi
for module in ${MODULES}; do
if [ "$(command -v "${module}_pre_stop")" = "${module}_pre_stop" ]; then
${module}_pre_stop || exit $?
fi
done
for module in ${MODULES}; do
if [ "$(command -v "${module}_stop")" = "${module}_stop" ]; then
${module}_stop
fi
done
# Only delete addresses for interfaces that exist
if _exists; then
# PPP can manage it's own addresses when IN_BACKGROUND
# Important in case "demand" set on the ppp link
if ! (yesno ${IN_BACKGROUND} && is_ppp) ; then
_delete_addresses "${IFACE}"
fi
fi
for module in ${MODULES}; do
if [ "$(command -v "${module}_post_stop")" = "${module}_post_stop" ]; then
${module}_post_stop
fi
done
# If not in background, and not loopback then bring the interface down
# unless overridden.
if ! yesno ${IN_BACKGROUND} && \
[ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
eval module=\$ifdown_${IFVAR}
module=${module:-${ifdown:-YES}}
yesno ${module} && _down 2>/dev/null
fi
type resolvconf >/dev/null 2>&1 && resolvconf -d "${IFACE}" 2>/dev/null
if [ "$(command -v "postdown")" = "postdown" ]; then
ebegin "Running postdown"
eindent
postdown
eoutdent
fi
return 0
}