681 lines
14 KiB
Bash
Executable File
681 lines
14 KiB
Bash
Executable File
#!/sbin/runscript
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# Copyright 2007-2008 Roy Marples <roy@marples.name>
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# All rights reserved. Released under the 2-clause BSD license.
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MODULESDIR="${RC_LIBDIR}/net"
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MODULESLIST="${RC_SVCDIR}/nettree"
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_config_vars="config routes"
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[ -z "${IN_BACKGROUND}" ] && IN_BACKGROUND="NO"
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description="Configures network interfaces."
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# Handy var so we don't have to embed new lines everywhere for array splitting
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__IFS="
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"
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depend()
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{
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local IFACE=${SVCNAME#*.}
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local IFVAR=$(shell_var "${IFACE}")
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need localmount
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after bootmisc
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provide net
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keywords nojail
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case "${IFACE}" in
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lo|lo0);;
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*) after net.lo net.lo0;;
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esac
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if type depend_${IFVAR} >/dev/null 2>&1; then
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depend_${IFVAR}
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fi
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local dep= prov=
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for dep in need use before after provide keywords; do
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eval prov=\$rc_${dep}_${IFVAR}
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if [ -n "${prov}" ]; then
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${dep} ${prov}
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fi
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done
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}
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# Support bash arrays - sigh
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_get_array()
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{
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local _a=
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if [ -n "${BASH}" ]; then
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case "$(declare -p "$1" 2>/dev/null)" in
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"declare -a "*)
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eval "set -- \"\${$1[@]}\""
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for _a; do
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printf "%s\n" "${_a}"
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done
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return 0
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;;
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esac
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fi
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eval _a=\$$1
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printf "%s" "${_a}"
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printf "\n"
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[ -n "${_a}" ]
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}
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# Flatten bash arrays to simple strings
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_flatten_array()
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{
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if [ -n "${BASH}" ]; then
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case "$(declare -p "$1" 2>/dev/null)" in
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"declare -a "*)
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eval "set -- \"\${$1[@]}\""
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for x; do
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printf "'%s' " "$(printf "$x" | sed "s:':'\\\'':g")"
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done
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return 0
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;;
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esac
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fi
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eval _a=\$$1
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printf "%s" "${_a}"
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printf "\n"
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[ -n "${_a}" ]
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}
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_wait_for_carrier()
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{
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local timeout= efunc=einfon
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_has_carrier && return 0
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eval timeout=\$carrier_timeout_${IFVAR}
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timeout=${timeout:-${carrier_timeout:-5}}
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# Incase users don't want this nice feature ...
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[ ${timeout} -le 0 ] && return 0
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yesno ${RC_PARALLEL} && efunc=einfo
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${efunc} "Waiting for carrier (${timeout} seconds) "
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while [ ${timeout} -gt 0 ]; do
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sleep 1
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if _has_carrier; then
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[ "${efunc}" = "einfon" ] && echo
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eend 0
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return 0
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fi
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timeout=$((${timeout} - 1))
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[ "${efunc}" = "einfon" ] && printf "."
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done
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[ "${efunc}" = "einfon" ] && echo
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eend 1
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return 1
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}
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_netmask2cidr()
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{
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# Some shells cannot handle hex arithmetic, so we massage it slightly
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# Buggy shells include FreeBSD sh, dash and busybox.
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# bash and NetBSD sh don't need this.
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case $1 in
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0x*)
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local hex=${1#0x*} quad=
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while [ -n "${hex}" ]; do
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local lastbut2=${hex#??*}
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quad=${quad}${quad:+.}0x${hex%${lastbut2}*}
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hex=${lastbut2}
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done
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set -- ${quad}
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;;
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esac
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local i= len=
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local IFS=.
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for i in $1; do
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while [ ${i} != "0" ]; do
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len=$((${len} + ${i} % 2))
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i=$((${i} >> 1))
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done
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done
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echo "${len}"
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}
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_configure_variables()
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{
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local var= v= t=
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for var in ${_config_vars}; do
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local v=
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for t; do
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eval v=\$${var}_${t}
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if [ -n "${v}" ]; then
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eval ${var}_${IFVAR}=\$${var}_${t}
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continue 2
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fi
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done
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done
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}
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_show_address()
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{
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einfo "received address $(_get_inet_address "${IFACE}")"
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}
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# Basically sorts our modules into order and saves the list
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_gen_module_list()
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{
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local x= f= force=$1
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if ! ${force} && [ -s "${MODULESLIST}" -a "${MODULESLIST}" -nt "${MODULESDIR}" ]; then
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local update=false
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for x in "${MODULESDIR}"/*.sh; do
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[ -e "${x}" ] || continue
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if [ "${x}" -nt "${MODULESLIST}" ]; then
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update=true
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break
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fi
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done
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${update} || return 0
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fi
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einfo "Caching network module dependencies"
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# Run in a subshell to protect the main script
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(
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after() {
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eval ${MODULE}_after="\"\${${MODULE}_after}\${${MODULE}_after:+ }$*\""
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}
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before() {
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local mod=${MODULE}
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local MODULE=
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for MODULE; do
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after "${mod}"
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done
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}
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program() {
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if [ "$1" = "start" -o "$1" = "stop" ]; then
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local s="$1"
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shift
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eval ${MODULE}_program_${s}="\"\${${MODULE}_program_${s}}\${${MODULE}_program_${s}:+ }$*\""
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else
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eval ${MODULE}_program="\"\${${MODULE}_program}\${${MODULE}_program:+ }$*\""
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fi
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}
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provide() {
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eval ${MODULE}_provide="\"\${${MODULE}_provide}\${${MODULE}_provide:+ }$*\""
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local x
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for x in $*; do
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eval ${x}_providedby="\"\${${MODULE}_providedby}\${${MODULE}_providedby:+ }${MODULE}\""
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done
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}
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for MODULE in "${MODULESDIR}"/*.sh; do
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sh -n "${MODULE}" || continue
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. "${MODULE}" || continue
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MODULE=${MODULE#${MODULESDIR}/}
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MODULE=${MODULE%.sh}
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eval ${MODULE}_depend
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MODULES="${MODULES} ${MODULE}"
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done
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VISITED=
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SORTED=
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visit() {
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case " ${VISITED} " in
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*" $1 "*) return;;
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esac
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VISITED="${VISITED} $1"
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eval AFTER=\$${1}_after
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for MODULE in ${AFTER}; do
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eval PROVIDEDBY=\$${MODULE}_providedby
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if [ -n "${PROVIDEDBY}" ]; then
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for MODULE in ${PROVIDEDBY}; do
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visit "${MODULE}"
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done
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else
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visit "${MODULE}"
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fi
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done
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eval PROVIDE=\$${1}_provide
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for MODULE in ${PROVIDE}; do
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visit "${MODULE}"
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done
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eval PROVIDEDBY=\$${1}_providedby
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[ -z "${PROVIDEDBY}" ] && SORTED="${SORTED} $1"
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}
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for MODULE in ${MODULES}; do
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visit "${MODULE}"
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done
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printf "" > "${MODULESLIST}"
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i=0
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for MODULE in ${SORTED}; do
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eval PROGRAM=\$${MODULE}_program
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eval PROGRAM_START=\$${MODULE}_program_start
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eval PROGRAM_STOP=\$${MODULE}_program_stop
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eval PROVIDE=\$${MODULE}_provide
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echo "module_${i}='${MODULE}'" >> "${MODULESLIST}"
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echo "module_${i}_program='${PROGRAM}'" >> "${MODULESLIST}"
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echo "module_${i}_program_start='${PROGRAM_START}'" >> "${MODULESLIST}"
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echo "module_${i}_program_stop='${PROGRAM_STOP}'" >> "${MODULESLIST}"
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echo "module_${i}_provide='${PROVIDE}'" >> "${MODULESLIST}"
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i=$((${i} + 1))
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done
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echo "module_${i}=" >> "${MODULESLIST}"
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)
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return 0
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}
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_load_modules()
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{
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local starting=$1 mymods=
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# Ensure our list is up to date
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_gen_module_list false
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if ! . "${MODULESLIST}"; then
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_gen_module_list true
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. "${MODULESLIST}"
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fi
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MODULES=
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if [ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
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eval mymods=\$modules_${IFVAR}
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[ -z "${mymods}" ] && mymods=${modules}
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fi
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local i=-1 x= mod= f= provides=
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while true; do
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i=$((${i} + 1))
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eval mod=\$module_${i}
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[ -z "${mod}" ] && break
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[ -e "${MODULESDIR}/${mod}.sh" ] || continue
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eval set -- \$module_${i}_program
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if [ -n "$1" ]; then
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x=
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for x; do
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[ -x "${x}" ] && break
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done
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[ -x "${x}" ] || continue
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fi
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if ${starting}; then
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eval set -- \$module_${i}_program_start
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else
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eval set -- \$module_${i}_program_stop
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fi
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if [ -n "$1" ]; then
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x=
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for x; do
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case "${x}" in
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/*) [ -x "${x}" ] && break;;
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*) type "${x}" >/dev/null 2>&1 && break;;
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esac
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unset x
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done
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[ -n "${x}" ] || continue
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fi
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eval provides=\$module_${i}_provide
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if ${starting}; then
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case " ${mymods} " in
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*" !${mod} "*) continue;;
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*" !${provides} "*) [ -n "${provides}" ] && continue;;
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esac
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fi
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MODULES="${MODULES}${MODULES:+ }${mod}"
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# Now load and wrap our functions
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if ! . "${MODULESDIR}/${mod}.sh"; then
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eend 1 "${SVCNAME}: error loading module \`${mod}'"
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exit 1
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fi
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[ -z "${provides}" ] && continue
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# Wrap our provides
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local f=
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for f in pre_start start post_start; do
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eval "${provides}_${f}() { type ${mod}_${f} >/dev/null 2>&1 || return 0; ${mod}_${f} \"\$@\"; }"
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done
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eval module_${mod}_provides="${provides}"
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eval module_${provides}_providedby="${mod}"
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done
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# Wrap our preferred modules
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for mod in ${mymods}; do
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case " ${MODULES} " in
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*" ${mod} "*)
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eval x=\$module_${mod}_provides
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[ -z "${x}" ] && continue
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for f in pre_start start post_start; do
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eval "${x}_${f}() { type ${mod}_${f} >/dev/null 2>&1 || return 0; ${mod}_${f} \"\$@\"; }"
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done
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eval module_${x}_providedby="${mod}"
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;;
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esac
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done
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# Finally remove any duplicated provides from our list if we're starting
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# Otherwise reverse the list
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local LIST="${MODULES}" p=
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MODULES=
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if ${starting}; then
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for mod in ${LIST}; do
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eval x=\$module_${mod}_provides
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if [ -n "${x}" ]; then
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eval p=\$module_${x}_providedby
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[ "${mod}" != "${p}" ] && continue
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fi
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MODULES="${MODULES}${MODULES:+ }${mod}"
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done
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else
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for mod in ${LIST}; do
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MODULES="${mod}${MODULES:+ }${MODULES}"
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done
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fi
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veinfo "Loaded modules: ${MODULES}"
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}
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_load_config()
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{
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local config="$(_get_array "config_${IFVAR}")"
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local fallback="$(_get_array fallback_${IFVAR})"
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config_index=0
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local IFS="$__IFS"
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set -- ${config}
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# We should support a space separated array for cidr configs
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if [ $# = 1 ]; then
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unset IFS
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set -- ${config}
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# Of course, we may have a single address added old style.
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case "$2" in
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netmask|broadcast|brd|brd+)
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local IFS="$__IFS"
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set -- ${config}
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;;
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esac
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fi
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# Ensure that loopback has the correct address
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if [ "${IFACE}" = "lo" -o "${IFACE}" = "lo0" ]; then
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if [ "$1" != "null" ]; then
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config_0="127.0.0.1/8"
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config_index=1
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fi
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else
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if [ -z "$1" ]; then
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ewarn "No configuration specified; defaulting to DHCP"
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config_0="dhcp"
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config_index=1
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fi
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fi
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# We store our config in an array like vars
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# so modules can influence it
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for cmd; do
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eval config_${config_index}="'${cmd}'"
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config_index=$((${config_index} + 1))
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done
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# Terminate the list
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eval config_${config_index}=
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config_index=0
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for cmd in ${fallback}; do
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eval fallback_${config_index}="'${cmd}'"
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config_index=$((${config_index} + 1))
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done
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# Terminate the list
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eval fallback_${config_index}=
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# Don't set to zero, so any net modules don't have to do anything extra
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config_index=-1
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}
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start()
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{
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local IFACE=${SVCNAME#*.} oneworked=false module=
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local IFVAR=$(shell_var "${IFACE}") cmd= our_metric=
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local metric=0
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einfo "Bringing up interface ${IFACE}"
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eindent
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if [ -z "${MODULES}" ]; then
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local MODULES=
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_load_modules true
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fi
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# We up the iface twice if we have a preup to ensure it's up if
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# available in preup and afterwards incase the user inadvertently
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# brings it down
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if type preup >/dev/null 2>&1; then
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_up 2>/dev/null
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ebegin "Running preup"
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eindent
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preup || return 1
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eoutdent
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fi
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_up 2>/dev/null
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for module in ${MODULES}; do
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if type "${module}_pre_start" >/dev/null 2>&1; then
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${module}_pre_start || exit $?
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fi
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done
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if ! _exists; then
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eerror "ERROR: interface ${IFACE} does not exist"
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eerror "Ensure that you have loaded the correct kernel module for your hardware"
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return 1
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fi
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if ! _wait_for_carrier; then
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if service_started devd; then
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ewarn "no carrier, but devd will start us when we have one"
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mark_service_inactive "${SVCNAME}"
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else
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eerror "no carrier"
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fi
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return 1
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fi
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local config= config_index=
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_load_config
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config_index=0
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eval our_metric=\$metric_${IFVAR}
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if [ -n "${our_metric}" ]; then
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metric=${our_metric}
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elif [ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
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metric=$((${metric} + $(_ifindex)))
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fi
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while true; do
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eval config=\$config_${config_index}
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[ -z "${config}" ] && break
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set -- ${config}
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ebegin "$1"
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eindent
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case "$1" in
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noop)
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if [ -n "$(_get_inet_address)" ]; then
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oneworked=true
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break
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fi
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;;
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null) :;;
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[0-9]*|*:*) _add_address ${config};;
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*)
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if type "${config}_start" >/dev/null 2>&1; then
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"${config}"_start
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else
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eerror "nothing provides \`${config}'"
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fi
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;;
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esac
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if eend $?; then
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oneworked=true
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else
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eval config=\$fallback_${config_index}
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if [ -n "${config}" ]; then
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eoutdent
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ewarn "Trying fallback configuration ${config}"
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eindent
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eval config_${config_index}=\$config
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unset fallback_${config_index}
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config_index=$((${config_index} - 1))
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fi
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fi
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eoutdent
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config_index=$((${config_index} + 1))
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done
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if ! ${oneworked}; then
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if type failup >/dev/null 2>&1; then
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ebegin "Running failup"
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eindent
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failup
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eoutdent
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fi
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return 1
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fi
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local hidefirstroute=false first=true
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local routes="$(_get_array "routes_${IFVAR}")"
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if [ "${IFACE}" = "lo" -o "${IFACE}" = "lo0" ]; then
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if [ "${config_0}" != "null" ]; then
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routes="127.0.0.0/8 via 127.0.0.1
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${routes}"
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hidefirstroute=true
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fi
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fi
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local OIFS="${IFS}" SIFS=${IFS-y}
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local IFS="$__IFS"
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for cmd in ${routes}; do
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unset IFS
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if ${first}; then
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first=false
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einfo "Adding routes"
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fi
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eindent
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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 ${MODULES}; do
|
|
if type "${module}_post_start" >/dev/null 2>&1; then
|
|
${module}_post_start || exit $?
|
|
fi
|
|
done
|
|
|
|
if type postup >/dev/null 2>&1; then
|
|
ebegin "Running postup"
|
|
eindent
|
|
postup
|
|
eoutdent
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
stop()
|
|
{
|
|
local IFACE=${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 type predown >/dev/null 2>&1; 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 ${MODULES}; do
|
|
if type "${module}_pre_stop" >/dev/null 2>&1; then
|
|
${module}_pre_stop || exit $?
|
|
fi
|
|
done
|
|
|
|
for module in ${MODULES}; do
|
|
if type "${module}_stop" >/dev/null 2>&1; then
|
|
${module}_stop
|
|
fi
|
|
done
|
|
|
|
# Only delete addresses for non PPP interfaces
|
|
if ! type is_ppp >/dev/null 2>&1 || ! is_ppp; then
|
|
_delete_addresses "${IFACE}"
|
|
fi
|
|
|
|
for module in ${MODULES}; do
|
|
if type "${module}_post_stop" >/dev/null 2>&1; 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 type postdown >/dev/null 2>&1; then
|
|
ebegin "Running postdown"
|
|
eindent
|
|
postdown
|
|
eoutdent
|
|
fi
|
|
|
|
return 0
|
|
}
|