uppercase

[rrq/rrqnet.git] / rrqnet-ifupdown.sh

diff --git a/rrqnet-ifupdown.sh b/rrqnet-ifupdown.sh
index 98d97e72c9d27e54d6d256d15eb8b2dc78b5fc1c..99e45df714d73a79037fea62b5a9357368b270a0 100755 (executable)
--- a/rrqnet-ifupdown.sh
+++ b/rrqnet-ifupdown.sh
@@ -18,16 +18,20 @@
 [ -z "$IF_RRQNET_PORT" ] && exit 0
 
 # An rrqnet stanza may have the following settings:
-# rrqnet_port <port>
-# rrqnet_renice <nice>
+# rrqnet_port [ notap ] <port> 
+# rrqnet_nice <nice>
 # rrqnet_remote <remote declaration>
 # rrqnet_options <options>
 # rrqnet_log <level> <pathname>
 # rrqnet_bridge <bridge>
+# rrqnet_dhcp <options>
 
-: ${RRQDAEMON:=/usr/local/sbin/rrqnet}
+: ${RRQDAEMON:=/usr/sbin/rrqnet}
 : ${NAME:=rrqnet-${IFACE}}
 
+NOTAP="${IF_RRQNET_PORT##notap *}" # empty if 'notap' is used
+IF_RRQNET_PORT="${IF_RRQNET_PORT#notap }"
+
 #function
 configure_tap_bridge() {
     [ -z "$IF_RRQNET_BRIDGE" ] && return 0
@@ -41,34 +45,88 @@ configure_tap_up() {
        grep -q "state UP" || ip link set dev $IFACE up
 }
 
+############################################################
+## DHCP support
+: ${LEASES:=/var/lib/dhcp/dhclient.$IFACE.leases}
+: ${DHCPARGS:="-4 -cf /dev/null"}
+: ${PIDFILE:=/var/run/dhclient.$IFACE}
+
+#function
+start_dhclient() {
+    shift 1
+    [ -z "$*" ] || DHCPARGS="$*"
+    /sbin/dhclient -pf $PIDFILE $DHCPARGS -lf $LEASES $IFACE
+}
+
+#function
+stop_dhclient() {
+    shift 1
+    [ -z "$*" ] || DHCPARGS="$*"
+    /sbin/dhclient -x -pf $PIDFILE $DHCPARGS -lf $LEASES $IFACE 2>/dev/null
+}
+
+############################################################
+## The action functions
+
 #function
 start_cable_pre_up() {
-    configure_tap_up || return 1
-    configure_tap_bridge || return 1
+    local TAP
+    TAP="-t $IFACE"
+    if [ -z "$NOTAP" ] ; then
+       echo "Note: $IFACE is an rrqnet without local interface" >&2
+       TAP=""
+    else
+       configure_tap_up || return 1
+       configure_tap_bridge || return 1
+    fi
+    [ -z "$IF_RRQNET_NICE" ] || \
+        RRQDAEMON="/usr/bin/nice -n $IF_RRQNET_NICE $RRQDAEMON"
     if [ -z "$IF_RRQNET_LOG" ] ; then
-       daemon -U -r -n $NAME -- \
+       daemon -U -r -a 10 -n $NAME -- \
               $RRQDAEMON $IF_RRQNET_OPTIONS \
-              -t $IFACE $IF_RRQNET_PORT $IF_RRQNET_REMOTE
+              $TAP $IF_RRQNET_PORT $IF_RRQNET_REMOTE
     else
-       daemon -U -r -n $NAME -E "${IF_RRQNET_LOG#* }" -- \
-              $RRQDAEMON ${IF_RRQNET_LOG%% *} $IF_RRQNET_OPTIONS \
-              -t $IFACE $IF_RRQNET_PORT $IF_RRQNET_REMOTE
+        LOG=${IF_RRQNET_LOG#* }
+        daemon -U -r -a 10 -n $NAME -E "$LOG" -- \
+               $RRQDAEMON ${IF_RRQNET_LOG%$LOG} $IF_RRQNET_OPTIONS \
+              $TAP $IF_RRQNET_PORT $IF_RRQNET_REMOTE
     fi
-    CHPID="$(cat /var/run/$NAME)"
-    [ -z "$RRQNET_RENICE" ] || [ -z "$CHPID" ] || \
-       renice -n "$RRQNET_RENICE" "$CHPID"
 }
 
 #function
-stop_cable_post_down() {
+start_cable_post_up() {
+    case "$IF_RRQNET_DHCP" in
+       dhclient*)
+           start_dhclient $IF_RRQNET_DHCP
+           ;;
+       *)
+           : # no or unkown dhcp option
+           ;;
+    esac
+}
+
+#function
+stop_cable_pre_down() {
+    case "$IF_RRQNET_DHCP" in
+       dhclient*)
+           stop_dhclient $IF_RRQNET_DHCP
+           ;;
+       *)
+           : # no or unkown dhcp option
+           ;;
+    esac
     daemon -n $NAME --stop
 }
 
-# main script body
+#function
+stop_cable_post_down() {
+    [ -z "$NOTAP" ] || ip link del $IFACE
+}
 
+# main script body
 case "$MODE-$PHASE" in
     start-pre-up) start_cable_pre_up ;;
-    start-post-up) : ;;
-    stop-pre-down) : ;;
+    start-post-up) start_cable_post_up ;;
+    stop-pre-down) stop_cable_pre_down ;;
     stop-post-down) stop_cable_post_down ;;
 esac