netconfig

#!/bin/sh
#-
# Copyright (c) 2011 Nathan Whitehorn
# All rights reserved.
# Copyright (c) 2011 The FreeBSD Foundation
# 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.
#

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1

INTERFACES=""
BSDDIALOG_ITEMS=""

: ${BSDDIALOG_OK=0}
: ${BSDDIALOG_CANCEL=1}
: ${BSDDIALOG_HELP=2}
: ${BSDDIALOG_EXTRA=3}
: ${BSDDIALOG_ESC=5}
: ${BSDDIALOG_ERROR=255}

for IF in `ifconfig -l`; do
	test "$IF" = "lo0" && continue
	(ifconfig -g wlan | egrep -wq $IF) && continue
	INTERFACES="$INTERFACES $IF"
done

WIRELESS_INTERFACES="$(sysctl -in net.wlan.devices)"
INTERFACES="$INTERFACES${WIRELESS_INTERFACES:+ }$WIRELESS_INTERFACES"
is_wireless_if() {
	for IF in $(sysctl -in net.wlan.devices); do
		if [ $IF = $1 ]; then
			return 0
		fi
	done
	return 1
}

for IF in $INTERFACES; do
	DESC=`sysctl -n dev.$(echo $IF | sed -E 's/([[:alpha:]]*)([[:digit:]]*)/\1.\2/g').%desc`
	BSDDIALOG_ITEMS="$BSDDIALOG_ITEMS $IF \"$DESC\""
done

if [ -z "$INTERFACES" ]; then
	bsddialog --backtitle "$OSNAME Installer" \
	    --title 'Network Configuration' \
	    --msgbox 'No network interfaces present to configure.' 0 0
	exit 1
fi

exec 5>&1
INTERFACE=$(echo $BSDDIALOG_ITEMS | xargs -o bsddialog \
    --backtitle "$OSNAME Installer" --title 'Network Configuration' \
    --ok-label 'Auto' --extra-button --extra-label 'Manual' \
    --menu 'Please select a network interface and configuration mode:' 0 0 0 2>&1 1>&5)
# xargs collapses exit codes to 0/1 (ignoring signals and 255), so exploit
# bsddialog output being empty when cancelling to distinguish Manual (Extra)
# from Cancel.
if [ $? -eq $BSDDIALOG_OK ]; then
	AUTO=auto
else
	if [ -z "$INTERFACE" ]; then
		exit 1
	fi
	AUTO=
fi
exec 5>&-

: > $BSDINSTALL_TMPETC/._rc.conf.net

IFCONFIG_PREFIX=""
if is_wireless_if $INTERFACE; then
	NEXT_WLAN_IFACE=wlan0	# XXX
	sysrc -f $BSDINSTALL_TMPETC/._rc.conf.net wlans_$INTERFACE="$NEXT_WLAN_IFACE"
	IFCONFIG_PREFIX="WPA "
	if [ ! -z $BSDINSTALL_CONFIGCURRENT ]; then
		ifconfig $NEXT_WLAN_IFACE create wlandev $INTERFACE
		ifconfig $NEXT_WLAN_IFACE up
	fi
	bsdinstall wlanconfig $NEXT_WLAN_IFACE || exec $0
	INTERFACE="$NEXT_WLAN_IFACE"
fi

IPV6_AVAIL=0
IPV4_AVAIL=0
sysctl -N kern.features.inet6 > /dev/null 2>&1
case $? in
0)	IPV6_AVAIL=1 ;;
esac
sysctl -N kern.features.inet > /dev/null 2>&1
case $? in
0)	IPV4_AVAIL=1 ;;
esac

AUTO_FAIL=
if [ ${IPV4_AVAIL} -eq 1 -a -z "$AUTO" ]; then
	bsddialog --backtitle "$OSNAME Installer" --title 'Network Configuration' \
	    --yesno 'Would you like to configure IPv4 for this interface?' 0 0
	if [ $? -ne $BSDDIALOG_OK ]; then
		IPV4_AVAIL=0
	fi
fi
if [ ${IPV4_AVAIL} -eq 1 ]; then
	bsdinstall netconfig_ipv4 ${INTERFACE} "${IFCONFIG_PREFIX}" $AUTO
	if [ $? -ne $BSDDIALOG_OK ]; then
		if [ -z "$AUTO" ]; then
			exec $0
		fi
		IPV4_AVAIL=0
		AUTO_FAIL="$AUTO_FAIL${AUTO_FAIL:+, }IPv4"
	fi
fi
# In case wlanconfig left an option and we do not support IPv4 we need to write
# it out on its own.  We cannot write it out with IPv6 as that suffix.
if [ ${IPV4_AVAIL} -eq 0 -a -n ${IFCONFIG_PREFIX} ]; then
	sysrc -f $BSDINSTALL_TMPETC/._rc.conf.net ifconfig_$INTERFACE="${IFCONFIG_PREFIX}"
fi
if [ ${IPV6_AVAIL} -eq 1 -a -z "$AUTO" ]; then
	bsddialog --backtitle "$OSNAME Installer" --title 'Network Configuration' \
	    --yesno 'Would you like to configure IPv6 for this interface?' 0 0
	if [ $? -ne $BSDDIALOG_OK ]; then
		IPV6_AVAIL=0
	fi
fi
if [ ${IPV6_AVAIL} -eq 1 ]; then
	bsdinstall netconfig_ipv6 ${INTERFACE} $AUTO
	if [ $? -ne $BSDDIALOG_OK ]; then
		if [ -z "$AUTO" ]; then
			exec $0
		fi
		IPV6_AVAIL=0
		AUTO_FAIL="$AUTO_FAIL${AUTO_FAIL:+, }IPv6"
	fi
fi

SEARCH=""
IP4_1=""
IP4_2=""
IP6_1=""
IP6_2=""
while read key value; do
	case "${key}" in
	search)		SEARCH="${value}" ;;
	nameserver)	# is more trick as we have to distinguish v4 and v6
		case "${value}" in
		[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*)
			if [ -z "${IP4_1}" ] ; then
				IP4_1="${value}"
			elif [ -z "${IP4_2}" ]; then
				IP4_2="${value}"
			fi
			;;
		[0-9A-Fa-f:]*:*)
			if [ -z "${IP6_1}" ] ; then
				IP6_1="${value}"
			elif [ -z "${IP6_2}" ]; then
				IP6_2="${value}"
			fi
			;;
		esac
		;;
	# ignore others
	esac
done < ${BSDINSTALL_TMPETC}/resolv.conf

RESOLV=""
if [ ${IPV6_AVAIL} -eq 1 -a ${IPV4_AVAIL} -eq 1 ];  then
	RESOLV="
	    'Search' 1 1 \"${SEARCH}\" 1 16 50 50 0
	    'Nameserver' 2 1 \"Nameserver\" 2 1 11 11 2
	    'IPv6 DNS #1' 2 1 \"${IP6_1}\" 2 16 50 50 0
	    'IPv6 DNS #2' 3 1 \"${IP6_2}\" 3 16 50 50 0
	    'IPv4 DNS #1' 4 1 \"${IP4_1}\" 4 16 16 16 0
	    'IPv4 DNS #2' 5 1 \"${IP4_2}\" 5 16 16 16 0"
elif [ ${IPV6_AVAIL} -eq 1 ]; then
	RESOLV="
	    'Search' 1 1 \"${SEARCH}\" 1 16 50 50 0
	    'Nameserver' 2 1 \"Nameserver\" 2 1 11 11 2
	    'IPv6 DNS #1' 2 1 \"${IP6_1}\" 2 16 50 50 0
	    'IPv6 DNS #2' 3 1 \"${IP6_2}\" 3 16 50 50 0"
elif [ ${IPV4_AVAIL} -eq 1 ]; then
	RESOLV="
	    'Search' 1 1 \"${SEARCH}\" 1 16 50 50 0
	    'Nameserver' 2 1 \"Nameserver\" 2 1 11 11 2
	    'IPv4 DNS #1' 2 1 \"${IP4_1}\" 2 16 16 16 0
	    'IPv4 DNS #2' 3 1 \"${IP4_2}\" 3 16 16 16 0"
else
	if [ -n "$AUTO_FAIL" ]; then
		bsddialog --backtitle "$OSNAME Installer" \
		    --msgbox "Failed to automatically configure interface (tried $AUTO_FAIL)." 0 0
		exec $0
	fi
	exit 0
fi

# Auto only guaranteed to have IPv4 and/or IPv6 address; may not have
# nameserver available
if [ -n "$AUTO" ] && [ -n "${IP4_1}" -o -n "${IP6_1}" ]; then
	# Convert from bsddialog arguments to default output
	RESOLV=$(echo "${RESOLV}" | xargs -n9 sh -c 'echo "$4"' '')
else
	exec 5>&1
	RESOLV=$(echo "${RESOLV}" | xargs -o bsddialog --backtitle "$OSNAME Installer" \
		--title 'Network Configuration' \
		--mixedform 'Resolver Configuration' 0 0 0 \
	2>&1 1>&5)
	if [ $? -eq $BSDDIALOG_CANCEL ]; then exec $0; fi
	exec 5>&-
fi

echo ${RESOLV} | tr ' ' '\n' | \
awk '
BEGIN {
	search=-1;
}
{
	if (/^[[:space:]]+$/) {
		next;
	}
	if (/^Nameserver$/) {
		printf "\n";
		search=0;
		next;
	}
	if (search == -1) {
		printf "search ";
		search=1;
	}
	if (search > 0) {
		printf "%s%s", (search > 1) ? " " : "", $1;
		search++;
		next;
	}
	printf "nameserver %s\n", $1;
}' > ${BSDINSTALL_TMPETC}/resolv.conf

mv $BSDINSTALL_TMPETC/._rc.conf.net $BSDINSTALL_TMPETC/rc.conf.net