Initial import

utils/openbsd/hotplug/trunk_urndis_hotplug.sh

@@ -0,0 +1,49 @@
+#!/bin/sh
+# env
+# Written in 2019 by Lucas
+# CC0 1.0 Universal/Public domain - No rights reserved
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty. You should have received a copy of the CC0 Public Domain
+# Dedication along with this software. If not, see
+# <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+usage() {
+	cat - <<. >&2
+Usage:
+	${0##*/} attach TRUNK_DEV URNDIS_DEV
+	${0##*/} detach TRUNK_DEV URNDIS_DEV
+.
+	exit 1
+}
+
+renew_dhcp_if_needed() {
+	iface=$1
+	hostname_if=/etc/hostname."$iface"
+	[ ! -r "$hostname_if" ] && return
+	while read -r line; do
+		[ "$line" = dhcp ] && dhclient "$iface" && break
+	done <"$hostname_if"
+}
+
+if [ $# -ne 3 ] || [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ]; then
+	usage
+fi
+cmd=$1
+trunk=$2
+urndis=$3
+
+case $cmd in
+attach) ifconfig "$urndis" up
+	ifconfig "$trunk" trunkport "$urndis"
+	renew_dhcp_if_needed "$trunk"
+	;;
+detach)	# $urndis could be already removed
+	ifconfig "$trunk" -trunkport "$urndis" 2>/dev/null || true
+	renew_dhcp_if_needed "$trunk"
+	;;
+*)	usage
+	;;
+esac