Add a new rc.d script, static_arp, which enables the administrator to

statically bind IPv4 <-> MAC address at boot time.

In order to use this, the administrator needs to configure the following
rc.conf(5) variable:

 - static_arp_pairs: A list of names for static bind pairs, and,
 - a series of static_arp_(name): the arguments that is being passed to
   ``arp -S'' operation.

Example:
  static_arp_pairs="gw"
  static_arp_gw="192.168.1.1 00:01:02:03:04:05"

See the rc.conf(5) manual page for more details.

Reviewed by:	-rc@
MFC after:	2 weeks

1 files changed, 71 insertions, 0 deletions

diff --git a/etc/rc.d/static_arp b/etc/rc.d/static_arp
new file mode 100644
index 0000000..937d660
--- /dev/null
+++ b/etc/rc.d/static_arp
@@ -0,0 +1,71 @@
+#!/bin/sh
+#
+# Copyright (c) 2009  Xin LI <delphij@FreeBSD.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# Configure static ARP table
+#
+# $FreeBSD$
+#
+
+# PROVIDE: static_arp
+# REQUIRE: netif
+# KEYWORD: nojail
+
+. /etc/rc.subr
+
+name="static_arp"
+start_cmd="static_arp_start"
+stop_cmd="static_arp_stop"
+
+static_arp_start()
+{
+	if [ -n "${static_arp_pairs}" ]; then
+		echo -n 'Binding static ARP pair(s):'
+		for e in ${static_arp_pairs}; do
+			local arp_args
+			echo -n " ${e}"
+			eval arp_args=\$static_arp_${e}
+			arp -S ${arp_args} >/dev/null 2>&1
+		done
+		echo '.'
+	fi
+}
+
+static_arp_stop()
+{
+	if [ -n "${static_arp_pairs}" ]; then
+		echo -n 'Unbinding static ARP pair(s):'
+		for e in ${static_arp_pairs}; do
+			local arp_args
+			echo -n " ${e}"
+			eval arp_args=\$static_arp_${e}
+			arp -d ${arp_args%%[ 	]*} > /dev/null 2>&1
+		done
+		echo '.'
+	fi
+}
+
+load_rc_config $name
+run_rc_command "$1"