89 lines
2.2 KiB
Bash
89 lines
2.2 KiB
Bash
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#!/bin/bash
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set -u
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# This script will read address-plan.md and extract registered IPv4 addresses.
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# From the extracted IPv4 address the matching IPv6 address is created.
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#
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# Since loopback (lo) is already configured with 127.0.0.0/8 there is no need
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# to the configure the loopback interface with the IPv4 addresses for the test
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# zones (all are within 127.0.0.0/8).
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#
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# The IPv6 addresses are configured on the loopback interface (lo) with this
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# script. If the address is already configured, an error message is outputted by
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# ip(), but can be ignored.
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usage() { echo "Usage: sudo $0" 1>&2;
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echo 1>&2;
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exit 1; }
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while getopts "h" o; do
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case "${o}" in
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h)
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usage
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;;
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*)
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usage
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;;
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esac
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done
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shift $((OPTIND-1))
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# Make sure the script is run by root
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if [ $(id -u) -ne 0 ] ; then
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echo "You must be root." 1>&2
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echo "Run 'sudo $0'" 1>&2
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exit 1
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fi
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# Get path of this script
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path=$(dirname $0)
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# address-plan.md must be in the same folder as this script
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datafile="$path/address-plan.md"
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# Function to add IPv4 address
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add_ipv4_address() {
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local ip=$1
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cmd="ip addr add $ip/32 dev lo"
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echo -n "Adding $ip : "
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$cmd && echo "added"
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}
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# Function to add IPv6 address
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add_ipv6_address() {
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local ip=$1
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local ipv6=$(echo $ip | sed 's/\./:/g') # Convert colon to dot
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cmd="ip addr add fda1:b2:c3::$ipv6/128 dev lo"
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echo -n "Adding fda1:b2:c3::$ipv6 : "
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$cmd && echo "added"
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}
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# Read every line in the data file (markdown)
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while IFS= read -r line; do
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# Get IP addresses without prefix (e.g. /24)
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if [[ $line =~ ^\|\ ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)\ +\| ]]; then
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ip_address=${BASH_REMATCH[1]}
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# Add address for IPv4
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add_ipv4_address $ip_address
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# Add address for IPv6
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add_ipv6_address $ip_address
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fi
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done < $datafile
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# An alternative approach is to run the following two commands to make all IPv6
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# addresses in the /64 range be available.
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#
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# $ sudo ip -6 route add to local fda1:b2:c3::/64 dev lo
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# $ sudo sysctl -w net.ipv6.ip_nonlocal_bind=1
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#
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# Migration to that approach should be combined with an update of the address
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# plan file (address-plan.md) and probably combined with specific address plans
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# with each test case.
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