diff options
Diffstat (limited to 'init.d/net.lo.in')
| -rw-r--r-- | init.d/net.lo.in | 680 |
1 files changed, 680 insertions, 0 deletions
diff --git a/init.d/net.lo.in b/init.d/net.lo.in new file mode 100644 index 00000000..8f53a86c --- /dev/null +++ b/init.d/net.lo.in @@ -0,0 +1,680 @@ +#!@PREFIX@/sbin/runscript +# Copyright 2007-2008 Roy Marples <roy@marples.name> +# All rights reserved. Released under the 2-clause BSD license. + +MODULESDIR="${RC_LIBDIR}/net" +MODULESLIST="${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 + after bootmisc + provide net + keyword nojail noprefix novserver + + case "${IFACE}" in + lo|lo0);; + *) after net.lo net.lo0;; + esac + + if [ "$(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} ${prov} + fi + done +} + +# Support bash arrays - sigh +_get_array() +{ + local _a= + if [ -n "${BASH}" ]; then + case "$(declare -p "$1" 2>/dev/null)" in + "declare -a "*) + eval "set -- \"\${$1[@]}\"" + for _a; do + printf "%s\n" "${_a}" + done + return 0 + ;; + esac + fi + + eval _a=\$$1 + printf "%s" "${_a}" + printf "\n" + [ -n "${_a}" ] +} + +# Flatten bash arrays to simple strings +_flatten_array() +{ + if [ -n "${BASH}" ]; then + case "$(declare -p "$1" 2>/dev/null)" in + "declare -a "*) + eval "set -- \"\${$1[@]}\"" + for x; do + printf "'%s' " "$(printf "$x" | sed "s:':'\\\'':g")" + done + return 0 + ;; + esac + fi + + eval _a=\$$1 + printf "%s" "${_a}" + printf "\n" + [ -n "${_a}" ] +} + +_wait_for_carrier() +{ + local timeout= efunc=einfon + + _has_carrier && return 0 + + eval timeout=\$carrier_timeout_${IFVAR} + timeout=${timeout:-${carrier_timeout:-5}} + + # 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 [ ${timeout} -gt 0 ]; do + sleep 1 + if _has_carrier; then + [ "${efunc}" = "einfon" ] && echo + eend 0 + return 0 + fi + timeout=$((${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 + while [ ${i} != "0" ]; do + len=$((${len} + ${i} % 2)) + i=$((${i} >> 1)) + done + done + + echo "${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 +} + +_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}'" >> "${MODULESLIST}" + i=$((${i} + 1)) + done + echo "module_${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=$((${i} + 1)) + eval mod=\$module_${i} + [ -z "${mod}" ] && break + [ -e "${MODULESDIR}/${mod}.sh" ] || continue + + eval set -- \$module_${i}_program + if [ -n "$1" ]; then + x= + for x; do + [ -x "${x}" ] && break + done + [ -x "${x}" ] || continue + fi + if ${starting}; then + eval set -- \$module_${i}_program_start + else + eval set -- \$module_${i}_program_stop + fi + if [ -n "$1" ]; then + x= + for x; do + case "${x}" in + /*) [ -x "${x}" ] && break;; + *) type "${x}" >/dev/null 2>&1 && break;; + esac + unset x + done + [ -n "${x}" ] || continue + fi + + eval provides=\$module_${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 + if [ $# = 1 ]; then + unset IFS + set -- ${config} + # Of course, we may have a single address added old style. + case "$2" in + netmask|broadcast|brd|brd+) + local IFS="$__IFS" + set -- ${config} + ;; + esac + fi + + # Ensure that loopback has the correct address + if [ "${IFACE}" = "lo" -o "${IFACE}" = "lo0" ]; then + if [ "$1" != "null" ]; then + config_0="127.0.0.1/8" + config_index=1 + fi + else + if [ -z "$1" ]; then + ewarn "No configuration specified; defaulting to DHCP" + config_0="dhcp" + config_index=1 + fi + fi + + + # We store our config in an array like vars + # so modules can influence it + for cmd; do + eval config_${config_index}="'${cmd}'" + config_index=$((${config_index} + 1)) + done + # Terminate the list + eval config_${config_index}= + + config_index=0 + for cmd in ${fallback}; do + eval fallback_${config_index}="'${cmd}'" + config_index=$((${config_index} + 1)) + done + # Terminate the list + eval fallback_${config_index}= + + # Don't set to zero, so any net modules don't have to do anything extra + config_index=-1 +} + +start() +{ + local IFACE=${RC_SVCNAME#*.} oneworked=false module= + local IFVAR=$(shell_var "${IFACE}") cmd= our_metric= + local metric=0 + + 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 + _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 "${IFACE}" != "lo0" ]; then + metric=$((${metric} + $(_ifindex))) + fi + + while true; do + eval config=\$config_${config_index} + [ -z "${config}" ] && break + + set -- ${config} + ebegin "$1" + 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 + eoutdent + ewarn "Trying fallback configuration ${config}" + eindent + eval config_${config_index}=\$config + unset fallback_${config_index} + config_index=$((${config_index} - 1)) + fi + fi + eoutdent + config_index=$((${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 + local routes="$(_get_array "routes_${IFVAR}")" + 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" + for cmd in ${routes}; do + unset IFS + if ${first}; then + first=false + einfo "Adding routes" + fi + 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" "*|default" "*) cmd="-net ${cmd}";; + *) cmd="-host ${cmd}";; + esac + if ${hidefirstroute}; then + _add_route ${cmd} >/dev/null 2>&1 + hidefirstroute=false + else + _add_route ${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() +{ + 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 + ${module}_stop + fi + done + + # Only delete addresses for non PPP interfaces + if ! [ "$(command -v is_ppp)" = "is_ppp" ] || ! is_ppp; then + _delete_addresses "${IFACE}" + fi + + for module in ${MODULES}; do + if [ "$(command -v "${module}_post_stop")" = "${module}_post_stop" ]; then + ${module}_post_stop + fi + done + + ! yesno ${IN_BACKGROUND} && \ + [ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ] && \ + _down 2>/dev/null + + type resolvconf >/dev/null 2>&1 && resolvconf -d "${IFACE}" 2>/dev/null + + if [ "$(command -v "postdown")" = "postdown" ]; then + ebegin "Running postdown" + eindent + postdown + eoutdent + fi + + return 0 +} |