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# 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 yesno ${clip_full:-yes}; then
atmclip_svc_start atmsigd "Signaling" && \
atmclip_svc_start ilmid "Integrated Local Management Interface" && \
atmclip_svc_start atmarpd "Address Resolution Protocol"
else
atmclip_svc_start atmarpd "Address Resolution Protocol"
fi
local r=$?
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 yesno ${clip_full:-yes}; then
atmclip_svc_stop ilmid "Integrated Local Management Interface"
atmclip_svc_stop atmsigd "Signaling"
fi
eoutdent
}
are_atmclip_svcs_running() {
start-stop-daemon --quiet --test --stop --pidfile /var/run/atmarpd.pid || return 1
if yesno ${clip_full:-yes}; then
start-stop-daemon --quiet --test --stop --pidfile /var/run/ilmid.pid || return 1
start-stop-daemon --quiet --test --stop --pidfile /var/run/atmsigd.pid || return 1
fi
return 0
}
clip_pre_start() {
local clip=
eval clip=\$clip_${IFVAR}
[ -z "${clip}" ] && 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() {
local clip="$(_get_array "clip_${IFVAR}")"
[ -z "${clip}" ] && 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 ${clip}; do
local IFS=","
set -- ${i}
unset IFS
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 :
|
