#----------------------------------------------------------------------------
# /www/srv/admin/cgi-helper-ip6
#
# Creation:     2013-11-07 LanSezi
# Last Update:  $Id: cgi-helper-ip4 51847 2018-03-06 14:55:07Z kristov $
#----------------------------------------------------------------------------

cgi_helper_ip6="yes"

# 
#----------------------------------------------------------------------------
# joins strings with given divider 
# join_by ', ', a b c ---> a,b,c
#----------------------------------------------------------------------------
join_by ()
{
    #joint_string=''
    local IFS="$1";
    shift;
    #joint_string="$*";
    echo "$*"
}

#----------------------------------------------------------------------------
# get IPv6 addresses (will be several) for given MAC address 
#----------------------------------------------------------------------------
get_ip6_for_mac ()
{
    local mac=$1
    local dev=$2
    # if no mac address or dev given then break (e.g. if device is no longer online
    # also omits given all IPv6 addresses to incorrect device
    if [ -z $mac ] || [ -z $dev ]
    then
        return 1
    fi
    local ip6Adresses=""

    for item in `ip -6 n | grep "$mac" | grep "$dev " | cut -d" " -f1 | sort -d`
    do
       local ip6_full=`netcalc canonicalize $item`
       ip6Adresses=$(join_by ',' $ip6Adresses $ip6_full)
    done
    echo $ip6Adresses | sed 's/,/<br>/g'
}



#----------------------------------------------------------------------------
# check a given adress for correct ipv6 ranges 
#----------------------------------------------------------------------------
ip6_isvalidaddr ()
{
    local ipcheck=$(netcalc canonicalize $1)
    return $?
}
#----------------------------------------------------------------------------
# remove leading zeros from ipv4 adress
#----------------------------------------------------------------------------
ip4_normalize ()
{
    
    local ipnorm=$(netcalc canonicalize $1)
    res=${ipnorm%/*}
}