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55 lines
1.3 KiB
55 lines
1.3 KiB
4 months ago
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# add private ipv4 and ipv6 addresses to loopback
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readonly V6_INNER='100::a/128'
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readonly V4_INNER='192.168.0.1/32'
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if getopts ":s" opt; then
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readonly SIT_DEV_NAME='sixtofourtest0'
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readonly V6_SIT='2::/64'
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readonly V4_SIT='172.17.0.1/32'
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shift
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fi
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fail() {
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echo "error: $*" 1>&2
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exit 1
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}
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setup() {
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ip -6 addr add "${V6_INNER}" dev lo || fail 'failed to setup v6 address'
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ip -4 addr add "${V4_INNER}" dev lo || fail 'failed to setup v4 address'
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if [[ -n "${V6_SIT}" ]]; then
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ip link add "${SIT_DEV_NAME}" type sit remote any local any \
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|| fail 'failed to add sit'
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ip link set dev "${SIT_DEV_NAME}" up \
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|| fail 'failed to bring sit device up'
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ip -6 addr add "${V6_SIT}" dev "${SIT_DEV_NAME}" \
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|| fail 'failed to setup v6 SIT address'
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ip -4 addr add "${V4_SIT}" dev "${SIT_DEV_NAME}" \
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|| fail 'failed to setup v4 SIT address'
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fi
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sleep 2 # avoid race causing bind to fail
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}
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cleanup() {
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if [[ -n "${V6_SIT}" ]]; then
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ip -4 addr del "${V4_SIT}" dev "${SIT_DEV_NAME}"
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ip -6 addr del "${V6_SIT}" dev "${SIT_DEV_NAME}"
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ip link del "${SIT_DEV_NAME}"
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fi
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ip -4 addr del "${V4_INNER}" dev lo
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ip -6 addr del "${V6_INNER}" dev lo
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}
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trap cleanup EXIT
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setup
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"$@"
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exit "$?"
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