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#!/bin/sh
#
# Copyright (C) 2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
if ipaddrcheck --is-ipv6 $1; then
# Set address family to IPv6 when an IPv6 address was specified
OPT="-V"
elif [[ $(dig $1 AAAA +short | grep -v '\.$' | wc -l) -gt 0 ]]; then
# CNAME is also part of the dig answer thus we must remove any
# CNAME response and only shot the AAAA response(s), this is done
# by grep -v '\.$'
# Set address family to IPv6 when FQDN has at least one AAAA record
OPT="-V"
else
# It's not IPv6, no option needed
OPT=""
fi
/usr/bin/iperf $OPT -c $1 $2
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