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109 lines
2.7 KiB
Bash
Executable File
109 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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#grep -E '(:|^(127|169\.254|10|172\.(1(6|7|8|9)|2[0-9]|30|31)|192\.168|(22(4|5|6|7|8|9)|23(0|1|2|3|4|5|6|7|8|9))).*)' findet:
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# loopback: 127.0.0.0/8
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# linklocal: 169.254.0.0/16
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# private: 10.0.0.0/8,
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# 172.16.0.0/12, (172.16… bis 172.31…)
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# 192.168.0.0/16
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# multicast: 224.0.0.0/4 (224… bis 239…)
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function all() {
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# Select just lines containing 'inet'.
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# 1.) Remove every indenting.
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# 2.) Remove 'inet '.
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# 3.) Remove everything after a '/' (including the /).
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ip -4 addr \
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| grep 'inet' \
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| sed -e 's/^[[:blank:]]*//' \
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-e 's/inet //' \
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-e 's/\/.*//'
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}
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function routed() {
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local _DEVICE
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_DEVICE="$(ip -4 route show default | xargs -n 1 | grep -A1 -i dev | tail -n 1)"
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readonly _DEVICE
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ip -4 addr show dev "${_DEVICE:?"Missing DEVICE"}" scope global \
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| grep 'inet' | xargs -n 1 \
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| grep -A1 'inet' \
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| tail -n 1 \
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| cut -d/ -f1
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}
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function public() {
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hostname -I | xargs -n 1 \
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| grep -vE '(:|^(127|169\.254|10|172\.(1(6|7|8|9)|2[0-9]|30|31)|192\.168|(22(4|5|6|7|8|9)|23(0|1|2|3|4|5|6|7|8|9))).*)'
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}
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# Maybe use "resolvectl status" to get DNS Server and specify 'nslookup'
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function published() {
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local _BOOT_HOSTNAME
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_BOOT_HOSTNAME="$(hostname -b)"
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readonly _BOOT_HOSTNAME
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nslookup -type=A "${_BOOT_HOSTNAME:?"Missing BOOT_HOSTNAME"}" | xargs -n 1 \
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| grep -A2 -i "${_BOOT_HOSTNAME}" \
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| grep -A1 -i 'address' \
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| tail -n1
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}
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function verified() {
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local _PUBLISHED_IP
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_PUBLISHED_IP="$(published)"
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readonly _PUBLISHED_IP
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[ -z "${_PUBLISHED_IP}" ] \
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&& return 0
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all | grep "${_PUBLISHED_IP}"
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}
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function usage() {
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echo "Use one of the following options:"
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echo " --all : prints all IPv4 addresses"
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echo " --routed : prints the IPv4 address used to send traffic to the default gateway"
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echo " --public : prints all IPv4 addresses direct accessable from the internet"
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echo " --published : prints the IPv4 address provided by DNS using this host's name"
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echo " --verified : prints the IPv4 included in 'all' und respended by 'published'"
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}
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function main(){
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case "${1}" in
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--all)
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all
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return 0
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;;
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--routed)
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routed
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return 0
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;;
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--public)
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public
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return 0
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;;
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--published)
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published
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return 0
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;;
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--verified)
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verified
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return 0
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;;
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*)
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usage
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return 1
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;;
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esac
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return 1
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}
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main "$@" && exit 0 || exit 1
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