From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Sun, 27 Sep 2020 13:37:33 +0000 (+1000)
Subject: added ifupdown hook script
X-Git-Tag: 0.3~9
X-Git-Url: https://git.rrq.au/?a=commitdiff_plain;h=d4bafdf7e0afe86b8a9263c7838dc56b6f39ede1;p=rrq%2Frrqnet.git

added ifupdown hook script
---

diff --git a/Makefile b/Makefile
index cee9a5b..1c18b47 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ MAN1DIR = $(DESTDIR)/usr/local/share/man/man1
 MAN8DIR = $(DESTDIR)/usr/local/share/man/man8
 
 SBINFILES = rrqnet rrqnet-cron.sh
-ETCFILES = set-source-route.sh
+ETCFILES = set-source-route.sh ifupdown.sh
 MAN1FILES = 
 MAN8FILES = rrqnet.8 rrqnet-cron.sh.8
 HTMLDOC = $(MAN8FILES:%=%.html)
@@ -46,7 +46,7 @@ INSTALL = install
 $(addprefix $(ETCDIR)/,conf.d keys):
 	mkdir -p $@
 
-$(ETCCFG)/cron.sh: rrqnet-cron.sh
+$(ETCDIR)/ifupdown.sh: rrqnet-ifupdown.sh
 	$(INSTALL) -D -T $< $@
 
 $(SBINDIR)/% $(ETCDIR)/% $(MAN1DIR)/% $(MAN8DIR)/%: %
diff --git a/rrqnet-ifupdown.sh b/rrqnet-ifupdown.sh
new file mode 100755
index 0000000..fab8bba
--- /dev/null
+++ b/rrqnet-ifupdown.sh
@@ -0,0 +1,87 @@
+#!/bin/sh
+#
+# Control script for starting or stopping an rrqnet virtual cable via
+# ifup/ifdown. To use this, you need firstly to links to this script
+# set up as /etc/network/if-pre-up.d/rrqnet and
+# /etc/network/if-down.d/rrqnet. Secondly, you need a stanza in
+# /etc/network/interfaces for the cabling tap and its associated
+# configuration settings.
+#
+# "rrqnet name" is the primary stanza key, which result in
+# a creation of a tap by that name, supported by an rrqnet plug
+# according to the setup in /etc/rrqnet/conf.d/name.conf
+
+#echo '===========' >> /tmp/FOO
+#env >> /tmp/FOO
+
+# Verify that it's an rrqnet stanza
+[ -z "$IF_RRQNET_PORT" ] && exit 0
+
+# An rrqnet stanza may have the following settings:
+# rrqnet_port <port>
+# rrqnet_remote <remote declaration>
+# rrqnet_bridge <bridge>
+# rrqnet_log <level> <pathname>
+
+: ${RRQDAEMON:=/usr/local/sbin/rrqnet}
+
+#function
+configure_tap_bridge() {
+    [ -z "$IF_RRQNET_BRIDGE" ] && return 0
+    brctl show $IF_RRQNET_BRIDGE | grep -wq $IFACE && return 0
+    brctl addif $IF_RRQNET_BRIDGE $IFACE
+}
+
+#function
+configure_tap_up() {
+    ( ip link show $IFACE 2>/dev/null || ip tuntap add $IFACE mode tap ) | \
+	grep -q "state UP" || ip link set dev $IFACE up
+}
+
+#function <env> start_cable <loglevel> <logfile>
+start_cable_pre_up() {
+    configure_tap_up
+    NAME="rrqnet-$IFACE"
+    if [ -z "$IF_RRQNET_LOG" ] ; then
+	daemon -U -r -n $NAME -- \
+	       $RRQDAEMON -4 $IF_RRQNET_OPTIONS \
+	       -t $IFACE $IF_RRQNET $IF_RRQNET_REMOTE
+    else
+	daemon -U -r -n $NAME -E "${IF_RRQNET_LOG#* }" -- \
+	       $RRQDAEMON ${IF_RRQNET_LOG%% *} -4 $IF_RRQNET_OPTIONS \
+	       -t $IFACE $IF_RRQNET_PORT $IF_RRQNET_REMOTE
+    fi
+}
+
+#function
+start_cable_post_up() {
+    configure_tap_bridge
+}
+
+#function
+stop_cable_pre_down() {
+    :
+}
+
+#function
+stop_cable_post_down() {
+    NAME="rrqnet-$IFACE"
+    daemon -n $NAME --stop
+}
+
+# main script body
+
+case "$MODE-$PHASE" in
+    start-pre-up)
+	start_cable_pre_up
+	;;
+    start-post-up)
+	start_cable_post_up
+	;;
+    stop-pre-down)
+	:
+	;;
+    stop-post-down)
+	stop_cable_post_down
+	;;
+esac