154 lines
3.6 KiB
Bash
154 lines
3.6 KiB
Bash
#!/usr/bin/env bash
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#
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# lib/common
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#
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# Copyright (c) 2020- RAP <contacto@partidopirata.com.ar>
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# Copyright (c) 2011-2016 LibreVPN <vpn@hackcoop.com.ar>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General
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# Public License along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# Terminar ante el menor error
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set -e
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# Habilitar debug tan pronto como sea posible si se usa -d en algún lado
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echo "$*" | grep -q " -\([a-z]\+\)\?d" && set -x
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# Comprueba si los programas necesarios existen en el sistema
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requires() {
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local missing=()
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local bin
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for bin in "$@"; do
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if ! type "$bin" &>/dev/null; then
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missing+=("$bin")
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fi
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done
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if [[ ${#missing[@]} -ne 0 ]]; then
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error "Los siguientes programas no se encuentran en PATH: ${missing[*]}"
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warning "Es posible que tengas que instalarlos usando tu gestor de paquetes, intentar usar sudo, o cambiar al usuario root."
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exit 1
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fi
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}
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trap_exit() {
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msg "ARGH! Algo pasó" 1>&2
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exit 1
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}
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trap 'trap_exit' TERM HUP QUIT INT ERR
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. "${RAP_LIBDIR}/msg"
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self="$(basename $0)"
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# Agrega una linea a un archivo
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add_to_file(){
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f=$1; shift
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echo "$*" >>"$f"
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}
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# Obtiene el directorio del nodo
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# $1 nombre del nodo
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get_node_dir() {
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node="$(get_node_name "$1")"
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dir="${RAP_NETWORKSDIR}/${node}"
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if [ ! -d "${dir}" ] || [ ! -f "${dir}/tinc.conf" ]; then
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fatal_error "El nodo no existe o es inválido"
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fi
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echo "${dir}"
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}
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# Obtiene el archivo del nodo en el directorio del nodo
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get_node_file() {
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node="$(get_node_name "$1")"
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dir="$(get_node_dir "$1")"
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file="${dir}/hosts/${node}"
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if [ ! -f "${file}" ]; then
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fatal_error "El archivo host de %s no existe" "$1"
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fi
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echo "${file}"
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}
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# Recibe un texto y elimina todos los caracteres no alfanuméricos
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sanitize () {
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tr -cd "[:alnum:]"
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}
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# Convertir texto a minúsculas
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lowercase () {
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tr "[:upper:]" "[:lower:]"
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}
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# Convierte llaves públicas en MAC
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public_key_to_mac () {
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grep -E "^[A-Za-z0-9/+=]+$" \
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| base64 -d \
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| sha256sum \
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| cut -d " " -f 1 \
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| cut -b 1-12 \
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| sed -re "s/../&:/g" \
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| cut -d : -f 1-6
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}
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# Limpia el hostname
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# @see tincd.conf(5)
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get_node_name() {
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echo "$1" | cut -d "." -f 1 | sanitize | lowercase
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}
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get_host_file() {
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node="$(get_node_name "${1}")"
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test -f "${RAP_HOSTS}/${node}" || \
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error "El archivo host de %s no existe" "$node" || \
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return 1
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echo "${RAP_HOSTS}/${node}"
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}
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# Obtiene un evento válido
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get_event() {
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echo "$1" | grep -qE "^host|subnet|tinc$" && echo "$1"
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}
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# Obtener un script
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get_script() {
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script_dir="${RAP_SKELDIR}/scripts"
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test -f "${script_dir}/$1" && echo "${script_dir}/$1"
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}
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if $root ; then
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# Salir si no se es root y no existe sudo, sino usarlo
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if ! test -w /; then
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if ! type sudo &>/dev/null; then
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fatal_error "Correr como root"
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else
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export sudo=sudo
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fi
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fi
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fi
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run_post_script(){
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if test -x "${RAP_EXEC_HOOKDIR}/${NETWORK}/post-${RAP_COMMAND}" ; then
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msg "Ejecutando post comandos:"
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exec ${RAP_EXEC_HOOKDIR}/${NETWORK}/post-${RAP_COMMAND}
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fi
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}
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