freebsd-dev/usr.sbin/bsdconfig/share/media/network.subr

if [ ! "$_MEDIA_NETWORK_SUBR" ]; then _MEDIA_NETWORK_SUBR=1
#
# Copyright (c) 2012-2013 Devin Teske
# 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.
#
# $FreeBSD$
#
############################################################ INCLUDES

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." media/network.subr
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/media/tcpip.subr

BSDCFG_LIBE="/usr/libexec/bsdconfig"
f_include_lang $BSDCFG_LIBE/include/messages.subr

############################################################ GLOBALS

NETWORK_INITIALIZED=

############################################################ FUNCTIONS

# f_media_init_network $device
#
# Initialize a network device (such as `fxp0', `em0', etc.). Returns success if
# able to successfully initialize the device. If not running as init (basically
# from the FreeBSD install media) then assume that the network has already been
# initialized and returns success.
#
# The variables (from variable.subr) used to initialize the network are as
# follows (all of which are configured either automatically or manually):
#
# 	VAR_IFCONFIG + device_name (e.g., `ifconfig_em0')
# 		Automatically populated but can be overridden in a script. This
# 		defines the ifconfig(8) properties specific to a chosen network
# 		interface device. Optional if VAR_IPV6ADDR is set.
# 	VAR_IPV6ADDR [Optional]
# 		If not running as init (and setting up RTSOL connections for
# 		the interface), then must be set manually. If set, used as the
# 		IPv6 configuration for the given network interface device.
# 	VAR_GATEWAY [Optional]
# 		If not running as init (and setting up a static connection for
# 		the interface) then must be set (usually via rc.conf(5), but
# 		can be set manually to override). If unset, the user is warned
# 		but not prevented from proceeding (as most connections need a
# 		default route but not everyone).
#
f_media_init_network()
{
	local dev="$1"

	f_dprintf "Init routine called for network device \`%s'." "$dev"
	if [ "$NETWORK_INITIALIZED" ]; then
		f_dprintf "Network already initialized."
		return $SUCCESS
	elif ! f_running_as_init; then
		f_dprintf "Not running as init -- calling the deed done."
		NETWORK_INITIALIZED=1
		return $SUCCESS
	fi

	if [ ! -e "$RESOLV_CONF" ]; then
		if ! f_config_resolv; then
			f_show_msg "$msg_cant_seem_to_write_out_resolv_conf" \
			           "$RESOLV_CONF"
			return $FAILURE
		fi
	fi

	local cp
	if f_getvar $VAR_IFCONFIG$dev cp; then
		#
		# If this interface isn't a DHCP one, bring it up.
		# If it is, then it's already up.
		#
		case "$cp" in
		*DHCP*)
			f_dprintf "A DHCP interface.  Should already be up."
			;;
		*)
			f_dprintf "Not a DHCP interface."
			if ! f_quietly ifconfig "$dev" $cp; then
				f_show_msg "$msg_unable_to_configure_device" \
				           "$dev"
				return $FAILURE
			fi
			local rp
			f_getvar $VAR_GATEWAY rp
			if [ ! "$rp" ]; then
				f_show_msg "$msg_no_gateway_has_been_set"
			else
				#
				# Explicitly flush all routes to get back to a
				# known sane state. We don't need to check this
				# exit code because if anything fails it will
				# show up in the route add below.
				#
				f_quietly route -n flush
				f_dprintf "Adding default route to %s." "$rp"
				if ! f_quietly route -n add default "$rp"; then
					f_show_msg \
					    "$msg_failed_to_add_default_route"
					return $FAILURE
				fi
			fi
		esac
	elif ! { f_getvar $VAR_IPV6ADDR cp && [ "$cp" ]; }; then
		f_show_msg "$msg_device_is_not_configured" "$dev"
		return $FAILURE
	fi

	f_dprintf "Network initialized successfully."
	NETWORK_INITIALIZED=1
	return $SUCCESS
}

# f_media_shutdown_network $device
#
# Shuts down the configured network device (e.g., `fxp0', `em0', etc.) and
# deletes the default route (if configured). Returns failure if the device
# passed has not been configured. If not running as init (basically from the
# FreeBSD install media) then does nothing and returns success.
#
f_media_shutdown_network()
{
	local dev="$1" cp

	f_dprintf "Shutdown called for network device %s" "$dev"
	if [ ! "$NETWORK_INITIALIZED" ]; then
		f_dprintf "Network not initialized -- nothing to do."
		return $SUCCESS
	fi

	unset NETWORK_INITIALIZED
	unset $VAR_NETWORK_DEVICE

	if ! f_running_as_init; then
		f_dprintf "Not running as init -- calling the deed done."
		return $SUCCESS
	fi

	f_getvar $VAR_IFCONFIG$dev cp || return $FAILURE
	f_dprintf "ifconfig %s down" "$dev"
	f_quietly ifconfig $dev down ||
		f_show_msg "$msg_unable_to_down_the_interface_properly" "$dev"

	if f_getvar $VAR_GATEWAY cp; then
		f_dprintf "Deleting default route."
		f_quietly route -n delete default
	fi

	return $SUCCESS
}

############################################################ MAIN

f_dprintf "%s: Successfully loaded." media/network.subr

fi # ! $_MEDIA_NETWORK_SUBR