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Diffstat (limited to 'net.Linux/clip.sh')
| -rw-r--r-- | net.Linux/clip.sh | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/net.Linux/clip.sh b/net.Linux/clip.sh new file mode 100644 index 00000000..d3ec4fd8 --- /dev/null +++ b/net.Linux/clip.sh @@ -0,0 +1,212 @@ +# Copyright 2005-2007 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 + +clip_depend() { + program /usr/sbin/atmsigd + before interface +} + +_config_vars="$_config_vars clip" + +# This starts a service. Albeit atmsigd, ilmid and atmarpd do allow for back- +# grounding through the -b option, its usage causes them to be sensible to +# SIGHUP, which is sent to all daemons when console detaches right after +# startup. This is probably due to the fact that these programs don't detach +# themself from the controlling terminal when backgrounding... The only way I +# see to overcame this is to use the --background option in start-stop-daemon, +# which is reported as a "last resort" method, but it acts correctly about this. +atmclip_svc_start() { + ebegin "Starting $2 Daemon ($1)" + start-stop-daemon --start \ + --background \ + --make-pidfile --pidfile "/var/run/$1.pid" \ + --exec "/usr/sbin/$1" -- -l syslog + eend $? +} + +atmclip_svcs_start() { + einfo "First CLIP instance: starting ATM CLIP daemons" + eindent + + if [ "${clip_full:-yes}" = "yes" ]; then + atmclip_svc_start atmsigd "Signaling" && \ + atmclip_svc_start ilmid "Integrated Local Management Interface" && \ + atmclip_svc_start atmarpd "Address Resolution Protocol" + else + atmclip_svc_start atmarpd "Address Resolution Protocol" + fi + + local r=$? + + eoutdent + return ${r} +} + +atmclip_svc_stop() { + ebegin "Stopping $2 Daemon ($1)" + start-stop-daemon --stop --quiet \ + --pidfile "/var/run/$1.pid" \ + --exec "/usr/sbin/$1" + eend $? +} + +atmclip_svcs_stop() { + einfo "Last CLIP instance: stopping ATM CLIP daemons" + eindent + + # Heartake operation! + sync + + atmclip_svc_stop atmarpd "Address Resolution Protocol" + if [ "${clip_full:-yes}" = "yes" ]; then + atmclip_svc_stop ilmid "Integrated Local Management Interface" + atmclip_svc_stop atmsigd "Signaling" + fi + + eoutdent +} + +are_atmclip_svcs_running() { + is_daemon_running atmarpd || return 1 + if [[ ${clip_full:-yes} == "yes" ]]; then + is_daemon_running ilmid || return 1 + is_daemon_running atmsigd || return 1 + fi + + return 0 +} + +atmarp() { + /usr/sbin/atmarp "$@" +} + +clip_pre_start() { + eval $(_get_array "clip_${IFVAR}") + [ -z "$@" ] && return 0 + + if [ ! -r /proc/net/atm/arp ] ; then + modprobe clip && sleep 2 + if [ ! -r /proc/net/atm/arp ] ; then + eerror "You need first to enable kernel support for ATM CLIP" + return 1 + fi + fi + + local started_here= + if ! are_atmclip_svcs_running ; then + atmclip_svcs_start || return 1 + started_here=1 + fi + + if ! _exists ; then + ebegin "Creating CLIP interface ${IFACE}" + atmarp -c "${IFACE}" + if ! eend $? ; then + [ -z "${started_here}" ] && atmclip_svcs_stop + return 1 + fi + fi + + return 0 +} + +clip_post_start() { + eval $(_get_array "clip_${IFVAR}") + [ -z "$@" ] && return 0 + + are_atmclip_svcs_running || return 1 + + # The atm tools (atmarpd?) are silly enough that they would not work with + # iproute2 interface setup as opposed to the ifconfig one. + # The workaround is to temporarily toggle the interface state from up + # to down and then up again, without touching its address. This (should) + # work with both iproute2 and ifconfig. + _down + _up + + # Now the real thing: create a PVC with our peer(s). + # There are cases in which the ATM interface is not yet + # ready to establish new VCCs. In that cases, atmarp would + # fail. Here we allow 10 retries to happen every 2 seconds before + # reporting problems. Also, when no defined VC can be established, + # we stop the ATM daemons. + local has_failures= i= + for i in "$@" ; do + set -- ${i} + local peerip="$1"; shift + local ifvpivci="$1"; shift + ebegin "Creating PVC ${ifvpivci} for peer ${peerip}" + + local nleftretries=10 emsg= ecode= + while [ ${nleftretries} -gt 0 ] ; do + nleftretries=$((${nleftretries} - 1)) + emsg="$(atmarp -s "${peerip}" "${ifvpivci}" "$@" 2>&1)" + ecode=$? && break + sleep 2 + done + + if ! eend ${ecode} ; then + eerror "Creation failed for PVC ${ifvpivci}: ${emsg}" + has_failures=1 + fi + done + + if [ -n "${has_failures}" ]; then + clip_pre_stop "${iface}" + clip_post_stop "${iface}" + return 1 + else + return 0 + fi +} + +clip_pre_stop() { + are_atmclip_svcs_running || return 0 + + # We remove all the PVCs which may have been created by + # clip_post_start for this interface. This shouldn't be + # needed by the ATM stack, but sometimes I got a panic + # killing CLIP daemons without previously vacuuming + # every active CLIP PVCs. + # The linux 2.6's ATM stack is really a mess... + local itf= t= encp= idle= ipaddr= left= + einfo "Removing PVCs on this interface" + eindent + { + read left && \ + while read itf t encp idle ipaddr left ; do + if [ "${itf}" = "${IFACE}" ]]; then + ebegin "Removing PVC to ${ipaddr}" + atmarp -d "${ipaddr}" + eend $? + fi + done + } < /proc/net/atm/arp + eoutdent +} + +# Here we should teorically delete the interface previously created in the +# clip_pre_start function, but there is no way to "undo" an interface creation. +# We can just leave the interface down. "ifconfig -a" will still list it... +# Also, here we can stop the ATM CLIP daemons if there is no other CLIP PVC +# outstanding. We check this condition by inspecting the /proc/net/atm/arp file. +clip_post_stop() { + are_atmclip_svcs_running || return 0 + + local itf= left= hasothers= + { + read left && \ + while read itf left ; do + if [ "${itf}" != "${IFACE}" ] ; then + hasothers=1 + break + fi + done + } < /proc/net/atm/arp + + if [ -z "${hasothers}" ] ; then + atmclip_svcs_stop || return 1 + fi +} + +# vim: set ts=4 : |