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Editing: netconfig_ipv6

#!/bin/sh
#-
# Copyright (c) 2011 Nathan Whitehorn
# Copyright (c) 2011 The FreeBSD Foundation
# Copyright (c) 2013-2015 Devin Teske
# All rights reserved.
#
# Portions of this software were developed by Bjoern Zeeb
# under sponsorship from the FreeBSD Foundation.
#
# 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..." "$0"
f_include $BSDCFG_SHARE/dialog.subr

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

#
# TODO:
# - Add DHCPv6 support once FreeBSD ships with it.
#

INTERFACE=$1
case "${INTERFACE}" in
"")	dialog --backtitle 'FreeBSD Installer' --title 'Network Configuration' \
	    --msgbox 'No interface specified for IPv6 configuration.' 0 0
	exit 1
	;;
esac

AGAIN=""
while : ; do
	MSG="Would you like to try stateless address autoconfiguration (SLAAC)${AGAIN}?"
	dialog --backtitle 'FreeBSD Installer' --title 'Network Configuration' \
	    --yesno "${MSG}" 0 0
	if [ $? -eq $DIALOG_OK ]; then
		if [ ! -z $BSDINSTALL_CONFIGCURRENT ]; then
			dialog --backtitle 'FreeBSD Installer' \
			    --infobox "Sending Router Solicitation ..." 0 0
			ifconfig ${INTERFACE} inet6 -ifdisabled accept_rtadv up
			err=$( rtsol -F $INTERFACE 2>&1 )
			if [ $? -ne 0 ]; then
				f_dprintf "%s" "$err"
				dialog --backtitle 'FreeBSD Installer' --msgbox "SLAAC failed." 0 0
				AGAIN=" again"
				continue
			fi
		fi
		echo ifconfig_${INTERFACE}_ipv6=\"inet6 accept_rtadv\" >> $BSDINSTALL_TMPETC/._rc.conf.net
		exit 0
	else
		break
	fi
done

ROUTER6=`netstat -Wrn -f inet6 | awk '/default/ {printf("%s\n", $2);}'`
ADDRS=`ifconfig ${INTERFACE} inet6 | \
awk  -v dfr="${ROUTER6}" '
BEGIN {
	n=0;
}
{
	if (/inet6/) {
		if (match($2, "^fe80:")) { next; };
		# For the moment ignore all but the first address; it might confuse the user.
		if (n > 0) { next; };
		n++;
		printf "\"IPv6 Address\" %d 0 \"%s/%s\" %d 16 50 0 0 ", n, $2, $4, n;
	}
}
END {
	if (n == 0) {
		n++;
		printf "\"IPv6 Address\" %d 0 \"\" %d 16 50 0 0 ", n, n;
	}
	n++;
	# Nasty trick adding a (hidden, same y) read-only field as a marker
	# to separate interface address(es) from the default router.
	printf "\"Default Router\" %d 0 \"%s\" %d 16 50 0 2 ", n, "DefaultRouter", n;
	printf "\"Default Router\" %d 0 \"%s\" %d 16 50 0 0 ", n, dfr, n;
}'`

exec 3>&1
IF_CONFIG=$(echo ${ADDRS} | xargs dialog --backtitle 'FreeBSD Installer' \
	--title 'Network Configuration' \
	--mixedform 'Static IPv6 Network Interface Configuration' 0 0 0 \
2>&1 1>&3)
if [ $? -eq $DIALOG_CANCEL ]; then exit 1; fi
exec 3>&-

echo ${IF_CONFIG} | tr ' ' '\n' | \
awk -v iface="${INTERFACE}" '
BEGIN {
	dfr=0;
	count=0;
}
{
	if (/^[[:space:]]+$/) {
		next;
	}
	if (/DefaultRouter/) {
		dfr=1;
		next;
	}
	if (dfr == 1) {
		printf("ipv6_defaultrouter=\"%s\"\n", $1);
		next;
	}
	if (count > 0) {
		# Ignore all but the first IP address for now.
		next;
	}
	count++;
	if (!match($1, "/")) {
		sub("$", "/64", $1);
	}
	printf("ifconfig_%s_ipv6=\"inet6 %s\"\n", iface, $1);
}' >> $BSDINSTALL_TMPETC/._rc.conf.net
retval=$?

if [ "$BSDINSTALL_CONFIGCURRENT" ]; then
	. $BSDINSTALL_TMPETC/._rc.conf.net
	ifconfig ${INTERFACE} `eval echo \\\$ifconfig_${INTERFACE}_ipv6`
	if [ "$ipv6_defaultrouter" ]; then
		route delete -inet6 default
		route add -inet6 default ${ipv6_defaultrouter}
		retval=$?
	fi
fi

exit $retval

################################################################################
# END
################################################################################

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Editing: netconfig_ipv6

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