Merge net.OS into net
This commit is contained in:
Roy Marples
221
net/clip.sh
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221
net/clip.sh
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# Copyright 2005-2007 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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clip_depend()
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{
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program /usr/sbin/atmsigd
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before interface
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}
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_config_vars="$_config_vars clip"
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# This starts a service. Albeit atmsigd, ilmid and atmarpd do allow for back-
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# grounding through the -b option, its usage causes them to be sensible to
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# SIGHUP, which is sent to all daemons when console detaches right after
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# startup. This is probably due to the fact that these programs don't detach
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# themself from the controlling terminal when backgrounding... The only way I
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# see to overcame this is to use the --background option in start-stop-daemon,
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# which is reported as a "last resort" method, but it acts correctly about this.
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atmclip_svc_start()
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{
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ebegin "Starting $2 Daemon ($1)"
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start-stop-daemon --start \
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--background \
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--make-pidfile --pidfile "/var/run/$1.pid" \
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--exec "/usr/sbin/$1" -- -l syslog
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eend $?
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}
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atmclip_svcs_start()
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{
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einfo "First CLIP instance: starting ATM CLIP daemons"
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eindent
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if yesno ${clip_full:-yes}; then
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atmclip_svc_start atmsigd "Signaling" && \
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atmclip_svc_start ilmid "Integrated Local Management Interface" && \
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atmclip_svc_start atmarpd "Address Resolution Protocol"
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else
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atmclip_svc_start atmarpd "Address Resolution Protocol"
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fi
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local r=$?
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eoutdent
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return ${r}
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}
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atmclip_svc_stop()
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{
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ebegin "Stopping $2 Daemon ($1)"
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start-stop-daemon --stop --quiet \
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--pidfile "/var/run/$1.pid" \
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--exec "/usr/sbin/$1"
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eend $?
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}
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atmclip_svcs_stop()
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{
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einfo "Last CLIP instance: stopping ATM CLIP daemons"
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eindent
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# Heartake operation!
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sync
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atmclip_svc_stop atmarpd "Address Resolution Protocol"
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if yesno ${clip_full:-yes}; then
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atmclip_svc_stop ilmid "Integrated Local Management Interface"
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atmclip_svc_stop atmsigd "Signaling"
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fi
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eoutdent
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}
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are_atmclip_svcs_running()
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{
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start-stop-daemon --quiet --test --stop --pidfile /var/run/atmarpd.pid || return 1
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if yesno ${clip_full:-yes}; then
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start-stop-daemon --quiet --test --stop --pidfile /var/run/ilmid.pid || return 1
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start-stop-daemon --quiet --test --stop --pidfile /var/run/atmsigd.pid || return 1
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fi
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return 0
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}
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clip_pre_start()
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{
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local clip=
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eval clip=\$clip_${IFVAR}
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[ -z "${clip}" ] && return 0
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if [ ! -r /proc/net/atm/arp ]; then
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modprobe clip && sleep 2
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if [ ! -r /proc/net/atm/arp ]; then
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eerror "You need first to enable kernel support for ATM CLIP"
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return 1
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fi
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fi
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local started_here=
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if ! are_atmclip_svcs_running; then
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atmclip_svcs_start || return 1
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started_here=1
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fi
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if ! _exists; then
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ebegin "Creating CLIP interface ${IFACE}"
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atmarp -c "${IFACE}"
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if ! eend $?; then
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[ -z "${started_here}" ] && atmclip_svcs_stop
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return 1
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fi
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fi
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return 0
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}
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clip_post_start()
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{
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local clip="$(_get_array "clip_${IFVAR}")"
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[ -z "${clip}" ] && return 0
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are_atmclip_svcs_running || return 1
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# The atm tools (atmarpd?) are silly enough that they would not work with
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# iproute2 interface setup as opposed to the ifconfig one.
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# The workaround is to temporarily toggle the interface state from up
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# to down and then up again, without touching its address. This (should)
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# work with both iproute2 and ifconfig.
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_down
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_up
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# Now the real thing: create a PVC with our peer(s).
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# There are cases in which the ATM interface is not yet
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# ready to establish new VCCs. In that cases, atmarp would
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# fail. Here we allow 10 retries to happen every 2 seconds before
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# reporting problems. Also, when no defined VC can be established,
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# we stop the ATM daemons.
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local has_failures= i=
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for i in ${clip}; do
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local IFS=","
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set -- ${i}
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unset IFS
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local peerip="$1"; shift
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local ifvpivci="$1"; shift
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ebegin "Creating PVC ${ifvpivci} for peer ${peerip}"
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local nleftretries=10 emsg= ecode=
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while [ ${nleftretries} -gt 0 ]; do
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nleftretries=$((${nleftretries} - 1))
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emsg="$(atmarp -s "${peerip}" "${ifvpivci}" "$@" 2>&1)"
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ecode=$? && break
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sleep 2
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done
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if ! eend ${ecode}; then
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eerror "Creation failed for PVC ${ifvpivci}: ${emsg}"
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has_failures=1
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fi
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done
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if [ -n "${has_failures}" ]; then
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clip_pre_stop "${iface}"
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clip_post_stop "${iface}"
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return 1
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else
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return 0
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fi
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}
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clip_pre_stop()
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{
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are_atmclip_svcs_running || return 0
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# We remove all the PVCs which may have been created by
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# clip_post_start for this interface. This shouldn't be
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# needed by the ATM stack, but sometimes I got a panic
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# killing CLIP daemons without previously vacuuming
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# every active CLIP PVCs.
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# The linux 2.6's ATM stack is really a mess...
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local itf= t= encp= idle= ipaddr= left=
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einfo "Removing PVCs on this interface"
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eindent
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{
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read left && \
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while read itf t encp idle ipaddr left; do
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if [ "${itf}" = "${IFACE}" ]; then
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ebegin "Removing PVC to ${ipaddr}"
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atmarp -d "${ipaddr}"
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eend $?
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fi
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done
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} < /proc/net/atm/arp
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eoutdent
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}
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# Here we should teorically delete the interface previously created in the
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# clip_pre_start function, but there is no way to "undo" an interface creation.
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# We can just leave the interface down. "ifconfig -a" will still list it...
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# Also, here we can stop the ATM CLIP daemons if there is no other CLIP PVC
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# outstanding. We check this condition by inspecting the /proc/net/atm/arp file.
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clip_post_stop()
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{
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are_atmclip_svcs_running || return 0
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local itf= left= hasothers=
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{
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read left && \
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while read itf left; do
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if [ "${itf}" != "${IFACE}" ]; then
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hasothers=1
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break
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fi
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done
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} < /proc/net/atm/arp
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if [ -z "${hasothers}" ]; then
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atmclip_svcs_stop || return 1
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fi
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}
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