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#!/bin/bash

function adt() {
	adt_num=$1
	adt_etat=$2
	adt_nom=$3
	ip4_nexthop=$4
	ip4_public=$5
	dev=eth1
	SELF=$(basename $0)
	INFO="logger -p notice -t $SELF --"
	CRIT="logger -p crit -t $SELF --"

	echo "$ip4_public	${adt_nom}.pub4	adt$adt_num" >> /etc/hosts.adt
	echo "$ip4_nexthop	${adt_nom}.gw4	hop$adt_num" >> /etc/hosts.adt

	case $adt_etat in
		actif)
			regex="^$ip4_public via [0-9.]+ dev $dev"
			ip route get $ip4_public | grep -qE "$regex"
			res=$?
			out=$(ip route replace $ip4_public via $ip4_nexthop dev $dev)
			res2=$?
			if [ $res2 -eq 0 ]; then
					if [ $res -eq 1 ]; then
						$INFO "Accès ajouté : adt $*"
					fi
			else
					$CRIT "ERREUR : adt $adt_num $adt_etat $adt_nom : pb remplacement route : '$out'"
			fi
			;;
		resilie)
			out=$(ip route delete $ip4_public 2>&1)
		   	res=$?	
			case $res in
				0) $INFO "Accès supprimé : adt $*" ;;
				2) : ;; # Route non trouvée, routage déjà supprimé
				*) $CRIT "ERREUR : adt $adt_num $adt_etat $adt_nom : pb suppression route : '$out'" ;;
			esac
			;;
		*)
			$CRIT "ERREUR : adt $adt_num $adt_etat $adt_nom : '$adt_etat' n'est pas un état reconnu"
			;;
	esac
}

function main() {
		> /etc/hosts.adt
		sysctl -w net.ipv4.ip_forward=1
		source /root/config_adt.sh
		cat /etc/hosts.system /etc/hosts.adt > /etc/hosts
}

main