## -*- mode: shell-script; -*- 

log() {
    echo "$1"
    test -x "$LOGGER" && $LOGGER -p info "$1"
}

check_file() {
    test -r "$2" || {
        echo "Can not find file $2 referenced by AddressTable object $1"
        exit 1
    }
}

getInterfaceVarName() {
    echo $1 | sed 's/\./_/'
}

##
## getaddr6() reimplementation idea courtesy Juergen Kammer
## <j.kammer@eurodata.de> See ticket #651
##
## Can not use awk substr() function as originally suggested by
## Juergen because of the difference in behavior between GNU awk and
## mawk (a bug?). GNU awk substr() returns +1 character while mawk
## returns n characters. Tested with GNU awk v3.1.5 (CentOS 5.2) and
## mawk v1.3.3 (Ubuntu Jaunty)
##
## This sed command has been tested with GNU sed v4.1.5 and busybox v1.00
##
## getaddr has been reimplemented to return list of all ipv4 addresses
## of the interface. This is different from its behavior in fwbuilder
## v2 and v3 where it returned only the first address.
##
getaddr_internal() {
    dev=$1
    name=$2
    af=$3
    L=$($IP $af addr show dev $dev |  sed -n '/inet/{s!.*inet6* !!;s!/.*!!p}' | sed 's/peer.*//')
    test -z "$L" && { 
        eval "$name=''"
        return
    }
    eval "${name}_list=\"$L\"" 
}

##
## This function reads all ipv4 addresses of interface (arg 1) and
## assignes the list to the variable which name is given as arg 2.
##
getaddr() {
    getaddr_internal $1 $2 "-4"
}

##
## This function reads all ipv6 addresses of interface (arg 1) and
## assignes the list to the variable which name is given as arg 2.
##
getaddr6() {
    getaddr_internal $1 $2 "-6"
}

# function getinterfaces is used to process wildcard interfaces
getinterfaces() {
    NAME=$1
    $IP link show | grep ": $NAME" | while read L; do
        OIFS=$IFS
        IFS=" :"
        set $L
        IFS=$OIFS
        echo $2
    done
}

diff_intf() {
    func=$1
    list1=$2
    list2=$3
    cmd=$4
    for intf in $list1
    do
        echo $list2 | grep -q $intf || {
        # $vlan is absent in list 2
            $func $intf $cmd
        }
    done
}

