#!/bin/bash

set -eu

synopsis() {
    cat << EOF
Usage : `basename $0` [-h] request [arg...] host 

requests : 
	REDIR proto port    : proto : tcp/udp, port : port à rediriger
	LOCAL_USER_NUM		: numéro local de l'utilisateur sur la machine (%32)
	PUBLIC_IP N # N		: public IP NUMBER
	MAC_ADDR N	# N		: network interface NUMBER
	ETH_LINK N	# N		: Ethernet link NUMBER
EOF
}

help() {
    cat << EOF

`basename $0` affiche des infos sur host.network.user.vdn 

La machine n'a pas besoin d'être démarrée (infos statiques)

Pour obtenir des infos dynamiques (redirection de ports) voir
vdn-infos

`synopsis`

-h  : affiche cette aide

EOF
}

usage() {
    synopsis
    exit 1
}

args() {
    local opt
    while getopts "h" opt; do
        case $opt in
            h) help; exit 0;;
            ?) usage;;
        esac
    done
    shift $(($OPTIND - 1))

	[ $# -lt 2 ] && usage;

	req=$1
	shift

	reqArgs=""
	while [ $# -gt 1 ]; do
		reqArgs="$reqArgs $1"
		shift
	done

	[ "$reqArgs" = "" ] && reqArgs=0

		
	host=$1

	if [ $host = current ]; then 
		set +u
		[ -z "$GUEST_NAME" ] && error "You can't user current in this context !"
		set -u
		host=$GUEST_NAME
	fi

}

all() {
	echo "REDIR $(reqArgs) : $(computeRedir $host $reqArgs)"
	echo "LOCAL_USER_NUM: $(computePublicIp $host $reqArgs)"
	echo "PUBLIC_IP: $(computePublicIp $host $reqArgs)"
	echo "MAC_ADDR: $(computeMacAddr $host $reqArgs)"
	echo "ETH_LINK: $(computeEthLink $host $reqArgs)"
}


# main

VDN_PATH=$(readlink -f $(dirname $0)/..); . $VDN_PATH/bin/functions.sh

#set -x
args "$@"

. $VDN_PATH/allocators/$VDN_RESOURCES_ALLOCATOR

case "$req" in
	REDIR) computeRedir $host $reqArgs;;
	LOCAL_USER_NUM) computeLocalUser $host $reqArgs;;
	PUBLIC_IP) computePublicIp $host $reqArgs;;
	MAC_ADDR) computeMacAddr $host $reqArgs;;
	ETH_LINK) computeEthLink $host $reqArgs;;
	all) all;;
	*) usage;;
esac