From 30f1fdd36559899dcd53d0620b1a0c4e7cebdc29 Mon Sep 17 00:00:00 2001
From: Robby Workman <rworkman@slackware.com>
Date: Thu, 9 Mar 2017 16:14:46 -0600
Subject: rc.inet1{,.conf}: Allow create/destroy of virtual tun/tap devices

---
 rc.inet1      | 27 +++++++++++++++++++++++++++
 rc.inet1.conf | 17 +++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/rc.inet1 b/rc.inet1
index 5f9c29d..2f982ca 100644
--- a/rc.inet1
+++ b/rc.inet1
@@ -73,6 +73,31 @@ lo_down() {
 # INTERFACE FUNCTIONS #
 #######################
 
+# Function to determine if virtual interfaces are defined
+virtif_determine() {
+  if [ ! -z ${VIRTIFNAME} ]; then
+    virtifcount=$(echo ${VIRTIFNAME[@]} | wc -w)
+  else
+    return 1
+  fi
+}
+
+# Function to create virtual interfaces
+virtif_create() {
+  # argument is 'i' - the position of this interface in the IFNAME array.
+  for i in $(seq 0 ${virtifcount}); do
+    /sbin/ip tuntap add dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]} user ${VIRTIFUSER[$i]} group ${VIRTIFGROUP[$i]}
+  done
+}
+
+# Function to destory virtual interfaces
+virtif_destroy() {
+  # argument is 'i' - the position of this interface in the IFNAME array.
+  for i in $(seq 0 ${virtifcount}); do
+    /sbin/ip tuntap del dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]}
+  done
+}
+
 # Function to assemble a bridge interface.
 br_open() {
   # argument is 'i' - the position of this interface in the IFNAME array.
@@ -256,6 +281,7 @@ gateway_down() {
 # Function to start the network:
 start() {
   lo_up
+  virtif_determine && virtif_create
   for i in ${IFNAME[@]} ; do
     if_up $i
   done
@@ -268,6 +294,7 @@ stop() {
   for i in ${IFNAME[@]} ; do
     if_down $i
   done
+  virtif_determine && virtif_destroy
   lo_down
 }
 
diff --git a/rc.inet1.conf b/rc.inet1.conf
index 85a8041..93b3e6c 100644
--- a/rc.inet1.conf
+++ b/rc.inet1.conf
@@ -55,6 +55,23 @@ DEBUG_ETH_UP="no"
 #USE_DHCP[0]=""
 #DHCP_HOSTNAME[0]=""
 
+# Virtual interfaces to create - these are created before any address
+# configuration or bridge setup is done, so you may use these interfaces
+# as IFNAME or BRNICS values. These can be tun or tap interfaces:
+# adjust VIRTIFNAME and VIRTIFTYPE accordingly
+#
+# Virtual tap interface example
+#VIRTIFNAME[0]="tap0"
+#VIRTIFTYPE[0]="tap"
+#VIRTIFUSER[0]="root"
+#VIRTIFGROUP[0]="root"
+#
+# Virtual tun interface example
+#VIRTIFNAME[1]="tun0"
+#VIRTIFTYPE[1]="tun"
+#VIRTIFUSER[1]="someuser"
+#VIRTIFGROUP[1]="somegroup"
+
 ## Example config information for wlan0.  Uncomment the lines you need and fill
 ## in your data.  (You may not need all of these for your wireless network)
 #IFNAME[4]="wlan0"
-- 
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