#!/bin/bash

# -----------------------------------------------------------------
# Programmable completion code for ipset (netfilter.org)
#
# https://github.com/AllKind/ipset-bash-completion
# https://sourceforge.net/projects/ipset-bashcompl
# -----------------------------------------------------------------

# Copyright (C) 2013-2016 Mart Frauenlob aka AllKind (AllKind@fastest.cc)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# -----------------------------------------------------------------
# Compatible with ipset versions: 6+
# Tested with ipset versions:
# 6.24, 6.27
# -----------------------------------------------------------------
# Requirements:
#
# bash v4 or greater.
#
# The bash completion package version 2.0 or greater is recommended.
# http://bash-completion.alioth.debian.org/
# Older version are not supported.
#
# If the package is not available, things might not be so reliable.
# Also the colon (if there) is removed from COMP_WORDBREAKS.
# This alteration is globally, which might affect other completions,
# if they don't take care of it themselves.
#
# -----------------------------------------------------------------
# Installation (quote from bash-completion README):
#
# Install it in one of the directories pointed to by
# bash-completion's pkgconfig file variables.  There are two
# alternatives: the recommended one is 'completionsdir' (get it with
# "pkg-config --variable=completionsdir bash-completion") from which
# completions are loaded on demand based on invoked commands' names,
# so be sure to name your completion file accordingly, and to include
# for example symbolic links in case the file provides completions
# for more than one command.  The other one which is present for
# backwards compatibility reasons is 'compatdir' (get it with
# "pkg-config --variable=compatdir bash-completion") from which files
# are loaded when bash_completion is loaded.
#
# For packages using GNU autotools the installation can be handled
# for example like this in configure.ac:
#
#  PKG_CHECK_VAR(bashcompdir, [bash-completion], [completionsdir], ,
#    bashcompdir="${sysconfdir}/bash_completion.d")
#  AC_SUBST(bashcompdir)
#
# ...accompanied by this in Makefile.am:
#
#  bashcompdir = @bashcompdir@
#  dist_bashcomp_DATA = # completion files go here
#
# For cmake we ship the bash-completion-config.cmake and
# bash-completion-config-version.cmake files. Example usage:
#
#  find_package(bash-completion)
#  if(BASH_COMPLETION_FOUND)
#    message(STATUS
#      "Using bash completion dir ${BASH_COMPLETION_COMPLETIONSDIR}")
#  else()
#    set (BASH_COMPLETION_COMPLETIONSDIR "/etc/bash_completion.d")
#    message (STATUS
#      "Using fallback bash completion dir ${BASH_COMPLETION_COMPLETIONSDIR}")
#  endif()
#
#  install(FILES your-completion-file DESTINATION
#    ${BASH_COMPLETION_COMPLETIONSDIR})
#
# For backwards compatibility it is still possible to put it into
# ~/.bash_completion or /etc/bash_completion.d/.
#
# -----------------------------------------------------------------
#
# Version 2.9.2
#
# -----------------------------------------------------------------

shopt -s extglob

# -----------------------------------------------------------------
# Functions
# -----------------------------------------------------------------

_ipset_is_set() {
local -i idx
((${#arr_sets[@]})) || arr_sets=( $( ( "${words[0]}" list -n ) 2>/dev/null ) )
for idx in ${!arr_sets[@]}; do
    if [[ ${arr_sets[idx]} = $1 ]]; then
        return 0
    fi
done
return 1
}

_ipset_get_set_type() {
local n d
while read n d; do
    [[ $n = Type: ]] && printf '%s\n' $d && break
done < <( ( "${words[0]}" -t list "$1" ) 2>/dev/null)
}

_ipset_set_has_option() {
while read -r; do
    [[ $REPLY = Header:*$1* ]] && return 0
done < <( ( "${words[0]}" -t list "$2" ) 2>/dev/null)
return 1
}

_ipset_get_supported_types() {
((${#arr_types[@]})) && return
local -i i=0 x
while read -r; do
    [[ $REPLY = "Supported set types:"* ]] && ((!i)) && i=1 && continue
    ((i)) || continue
    if [[ $REPLY = *:* ]]; then
        set -- $REPLY
		for x in ${!arr_types[@]}; do # check if already registered
			if [[ $1 = ${arr_types[x]} ]]; then
				continue 2
			fi
		done
        arr_types+=("$1") # register type
    fi
done < <( ( "${words[0]}" help ) 2>/dev/null )
}

_ipset_get_members() {
local -i in_list=0 no=0
arr_members=()
if [[ $1 = --names-only ]]; then no=1
    shift
fi
while read -r; do
    [[ $REPLY = Members:* ]] && in_list=1 && continue
    ((in_list)) || continue
    if ((no)); then
        arr_members+=("${REPLY%% *}")
    else
        arr_members+=("$REPLY")
    fi
done < <( ( "${words[0]}" list "$1" ) 2>/dev/null)
}

_ipset_get_set_family() {
while read -r; do
    [[ $REPLY = Header:*"family inet6"* ]] && printf "v6\n" && return
    [[ $REPLY = Header:*"family inet "* ]] && printf "v4\n" && return
    [[ $REPLY = Header:*"range "*.*.*.* ]] && printf "v4\n" && return
done < <( ( "${words[0]}" -t list "$1" ) 2>/dev/null)
}

_ipset_dedupe_cmd_opts() {
local str_opt
local -i idx
for str_opt; do
    for idx in ${!arr_dupe_cmd_opts[@]}; do
        if [[ $str_opt = ${arr_dupe_cmd_opts[idx]} ]]; then
            if [[ $_DEBUG_NF_COMPLETION ]]; then
                printf "removing dupe option str_opt: %s\n" \
                    "${arr_dupe_cmd_opts[idx]}"
            fi
            continue 2
        fi
    done
    printf "%s\n" "$str_opt"
done
}

_ipset_get_options() {
local str_list
local -i idx oidx ridx
if ((got_action)); then
    if [[ $str_action = @(rename|e|swap|w|test|flush|destroy|x) ]]; then
        str_list='-q -quiet'
    elif [[ $str_action = save ]]; then
        str_list='-f -file -q -quiet -o -output'
    elif [[ $str_action = @(create|n|add|del) ]]; then
        str_list='-! -exist -q -quiet'
    elif [[ $str_action = restore ]]; then
        str_list='-! -exist -f -file -q -quiet'
    elif [[ $str_action = list ]]; then
        str_list='-f -file -q -quiet'
        if ((names_only || headers_only)); then
            str_list+=' -o -output'
        elif ((res_sort)); then
            str_list+=' -o -output -r -resolve -s -sorted'
        elif ((save_format == 1)); then
            str_list+=' -r -resolve -s -sorted -t -terse'
        elif ((save_format == 3)); then
            str_list+=' -r -resolve -s -sorted'
        else
            str_list+=' -n -name -o -output -r -resolve -s -sorted -t -terse'
        fi
    fi
else
    str_list='-f -file -q -quiet'
    if ((names_only || headers_only)) && ((save_format == 1)); then
        :
    elif ((names_only || headers_only)); then
        str_list+=' -o -output'
    elif ((res_sort)); then
        str_list+=' -o -output -r -resolve -s -sorted'
    elif ((save_format == 1)); then
        str_list+=' -r -resolve -s -sorted -t -terse'
    elif ((save_format == 3)); then
        str_list+=' -r -resolve -s -sorted'
    elif ((ignore_errors)); then
        :
    elif ((use_file)); then
        str_list="-! -exist -n -name -o -output -q -quiet -r \
            -resolve -s -sorted -t -terse"
    else
        str_list='- ${arr_opts[@]}'
    fi
fi
COMPREPLY=( $( compgen -W "$str_list" -- "$cur" ) )
((${#COMPREPLY[@]})) || return 0

# post process the reply
if [[ ${_IPSET_COMPL_OPT_FORMAT:=long} = long ]]; then # choose on env var
    for ridx in ${!COMPREPLY[@]}; do # remove short version of options
        [[ ${COMPREPLY[ridx]} = -? ]] && unset COMPREPLY[ridx]
    done
elif [[ ${_IPSET_COMPL_OPT_FORMAT} = short ]]; then
    for ridx in ${!COMPREPLY[@]}; do # remove short version of options
        [[ ${COMPREPLY[ridx]} = -??* ]] && unset COMPREPLY[ridx]
    done
fi
for idx in ${!arr_used_opts[@]}; do
    # if the user supplied the short form of an option previously,
    # and now requests the long form, remove the corresponding long option,
    # vice versa for short options
    for oidx in ${!arr_opts[@]}; do # cycle through main options
        set -- ${arr_opts[oidx]} # $1 = short , $2 = long option
        [[ $1 = $cur ]] && continue
        [[ ${arr_used_opts[idx]} =~ ^($1|$2)$ ]] || continue
        for ridx in ${!COMPREPLY[@]}; do # compare with compreply
            if [[ ${COMPREPLY[ridx]} = ${BASH_REMATCH[1]} ]]; then
                if [[ $_DEBUG_NF_COMPLETION ]]; then
                    printf "removing option alias COMPREPLY[$ridx]: %s\n" \
                        "${COMPREPLY[ridx]}"
                fi
                unset COMPREPLY[ridx]
                break 2
            fi
        done
    done
    for ridx in ${!COMPREPLY[@]}; do # de-dupe options
        if [[ ${arr_used_opts[idx]} = ${COMPREPLY[ridx]} && \
            ${COMPREPLY[ridx]} != $cur ]]; then
            if [[ $_DEBUG_NF_COMPLETION ]]; then
                printf "removing dupe option COMPREPLY[$ridx]: %s\n" \
                    "${COMPREPLY[ridx]}"
            fi
            unset COMPREPLY[ridx]
            break
        fi
    done
done
}

_ipset_get_networks() {
local foo str_net rest
[[ -r /etc/networks ]] || return 0
[[ ${_IPSET_COMP_NETWORKS-1} ]] || return 0
while read -r foo str_net rest; do
    [[ $foo = @(""|*([[:blank:]])#*) ]] && continue
    [[ $str_net = *([[:blank:]])#* ]] && continue
    printf "%s\n" "$str_net"
done < /etc/networks
}

_ipset_get_protocols() {
local str_name rest
while read -r str_name rest; do
    if [[ $str_name = @(""|*([[:blank:]])#*) ]]; then continue
    elif [[ $str_name = *-* ]]; then str_name="[$str_name]"
    fi
    printf "%s\n" "$str_name"
done < /etc/protocols
}

_ipset_get_svnum() {
# find service num to set offset
local str_name str_num str_p=all rest
local _str_p _str_o=""
while (($#)); do
    if [[ $1 = -p ]]; then
        _str_p="${2:-all}"
        shift
    elif [[ $1 = -o && ${2:-"-no"} != -* ]]; then
        # second part of range will have offset = first_part_of_range+1
        _str_o="$2"
        shift
    fi
    shift
done
if [[ $_str_o && $_str_o != +([[:digit:]]) ]]; then
    while read str_name str_num rest; do
        if [[ $str_name = *([[:blank:]])#* ]]; then continue
        elif [[ $_str_p != all && ${str_num#*/} != $_str_p ]]; then
            continue
        fi
        [[ $str_name = $_str_o ]] && printf "%s\n" ${str_num%/*} && return

    done < /etc/services
else
    printf "%s\n" "$_str_o"
fi
}

_ipset_get_services() {
local str_offset="" str_name str_num str_p=all rest
while (($#)); do
    if [[ $1 = -p ]]; then
        str_p="${2:-all}"
        shift
    elif [[ $1 = -o && ${2:-"-no"} != -* ]]; then
        # second part of range will have offset = first_part_of_range+1
        str_offset="${2}"
        shift
    fi
    shift
done
# find service num to set offset
if [[ $str_offset && $str_offset != +([[:digit:]]) ]]; then
    str_offset=$(_ipset_get_svnum -p "$str_p" -o "$str_offset")
    [[ $str_offset = +([[:digit:]]) ]] || str_offset="" # we failed
fi
# identify and print the services
while read -r str_name str_num rest; do
    if [[ $str_name = @(""|*([[:blank:]])#*) ]]; then continue
    elif [[ $str_p != all && ${str_num#*/} != $str_p ]]; then
        continue
    elif [[ $str_offset && $str_num && $str_num = +([[:digit:]])/* ]] && \
        ((${str_num%/*} <= $str_offset)); then
        continue
    elif [[ $str_name = *-* ]]; then str_name="[$str_name]"
    fi
    printf "%s\n" "$str_name"
done < /etc/services
}

_ipset_get_ifnames() {
while read -r; do
    REPLY="${REPLY#*: }"
    printf "%s\n" ${REPLY%%:*}
done < <(PATH=${PATH}:/sbin ( command ip -o link show ) 2>/dev/null)
}

_ipset_get_iplist() {
# if a file with ip addresses is in env var, load em
local str_ip rest
if [[ $1 = v4 ]]; then
str_regex='^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(/([3][0-2]|[1-2]?[0-9]))?$'
elif [[ $1 = v6 ]]; then
str_regex='^([0-9a-fA-F]{1,4}(:[0-9a-fA-F]{1,4}){7}|([0-9a-fA-F]{1,4}:){1}(:[0-9a-fA-F]{1,4}){1,6}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,6}(:[0-9a-fA-F]{1,4}){1})(/([1][0-2][0-9]|[1-9]?[0-9]))?$'
else return 0
fi
[[ $_IPSET_IPLIST_FILE && -r $_IPSET_IPLIST_FILE ]] || return 0
while read -r str_ip rest; do
    [[ $str_ip = *([[:blank:]])\#* ]] && continue
    str_ip="${str_ip//\#*/}"
    [[ $str_ip =~ $str_regex ]] && printf "%s\n" "$str_ip"
done < "${_IPSET_IPLIST_FILE}"
}

_ipset_complete_elements() {
local lcur="$1" str_lprefix=""
local -i no_range=0
shift
while (($#)); do
    [[ $1 = --no-range ]] && no_range=1
    shift
done
if [[ $lcur = *-[[]+([!]]) ]]; then # incomplete range - host/port with dash
    str_lprefix="${lcur%\-[*}-"
    lcur="${lcur#"$str_lprefix"}"
elif [[ $lcur = \[*\]-* ]]; then # first part of host/portname range
    str_lprefix="${lcur%\]-*}]-" lcur="${lcur##*\]-}"
elif [[ $lcur = *-* ]]; then
    str_lprefix="${lcur%-*}-" lcur="${lcur##*-}"
elif [[ $lcur =~ (tcp|udp):.* ]]; then # proto:port (bitmap:port)
    str_lprefix="${BASH_REMATCH[1]}:" lcur="${lcur#*:}"
    no_range=0  # workaround
fi
if [[ $str_lprefix ]]; then
    [[ $str_lprefix = */* ]] && return 1
    ((no_range)) && return 1
    _ipset_get_members --names-only "$str_setname"
    COMPREPLY+=( $( compgen -P "$str_lprefix" -W '${arr_members[@]/*\/*/}' -- "$lcur" ) )
else
    _ipset_get_members --names-only "$str_setname"
    COMPREPLY+=( $( compgen -W '${arr_members[@]}' -- "$lcur" ) )
fi
}

_ipset_complete_portrange() {
# complete port ranges
local lcur="$1"
local str_lprefix="$lcur" str_p=""
str_var=0 str_glob='[^[]*-*'
if [[ $lcur = *:* ]]; then # look for `proto:'
    ((got_bp_proto)) || return 0 # supported since ipset v6.20
    # only tcp/udp is valid as PROTO spec
    [[ ${lcur%%:*} = @(tcp|udp) ]] || return 0
    str_p=${lcur%%:*}
    lcur="${lcur#$str_p:}"
fi
if [[ $lcur = \[*-*\]-* ]]; then # spec with bracket
    str_var="${lcur#\[}"
    str_var="${str_var%%\]*}"
    lcur="${lcur#*\]-}"
    str_lprefix=${str_lprefix%"$lcur"}
elif [[ $lcur = $str_glob ]]; then # spec without bracket
    str_var="${lcur%%-*}"
    lcur="${lcur#*-}"
    str_lprefix=${str_lprefix%"$lcur"}
else # no prefix
    str_lprefix=""
    compopt -o nospace
fi
if [[ $str_p ]]; then # we have a proto spec
    COMPREPLY=( $(compgen -P "$str_p:$str_lprefix" \
        -W '$(_ipset_get_services -o $str_var -p $str_p)' -- "$lcur" ) )
    __ltrim_colon_completions "$str_p:$str_lprefix$lcur"
else
    if [[ $str_lprefix ]]; then
        COMPREPLY=( $(compgen -P "$str_lprefix" \
            -W '$(_ipset_get_services -o $str_var)' -- "$lcur" ) )
    else
        if ((got_bp_proto)); then # supported since ipset v6.20
            COMPREPLY=( $(compgen \
                -W 'tcp: udp: $(_ipset_get_services)' -- "$lcur" ) )
        else # only tcp services prior to ipset v6.20
            COMPREPLY=( $(compgen \
                -W '$(_ipset_get_services -p tcp)' -- "$lcur" ) )
        fi
    fi
fi
}

_ipset_complete_hostnames() {
local -i idx got_bracket=0
local lcur="${1//@(\[|\])}"
[[ $lcur = $1 ]] || got_bracket=1
if ((got_bashcompl)); then
    _ipset_known_hosts -F "$_IPSET_SSH_CONFIGS" -- "$lcur"
else
    if [[ ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
        COMPREPLY+=( $( compgen -A hostname -- "$lcur" ) )
    fi
fi
for idx in ${!COMPREPLY[@]}; do
    if [[ ${COMPREPLY[idx]} = *-* ]]; then
        COMPREPLY[idx]="[${COMPREPLY[idx]}]"
    else
        ((got_bracket)) && unset COMPREPLY[idx]
    fi
done
}

_ipset_complete_iface_spec() {
local lcur="$1" str_lprefix=""
if [[ $lcur != *,* ]]; then
    str_lprefix="" str_glob='+([![])-*'
    compopt -o nospace
    if [[ x$str_action != xtest ]]; then
        if [[ $lcur = \[*-*\]-* ]]; then # hostrange spec
            str_lprefix="${lcur%\]-*}]-" lcur="${lcur#*\]-}"
        elif [[ $lcur = *-[[]+([!]]) ]]; then # incomplete range - host with dash
            str_lprefix="${lcur%-\[*}-"
            lcur="${lcur#"$str_lprefix"}"
        elif [[ $lcur = $str_glob ]]; then # range spec
            str_lprefix="${lcur%-*}-" lcur="${lcur#*-}"
        fi
    fi
    # ip-list from file
    COMPREPLY+=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$lcur" ) )
    # networks
    COMPREPLY+=( $( compgen -W '$(_ipset_get_networks)' -- "$lcur" ) )
    # hostnames
    _ipset_complete_hostnames "$lcur"
    if [[ $str_lprefix ]]; then # range spec
        COMPREPLY=( $( compgen -P "$str_lprefix" -W '${COMPREPLY[@]//*\/*/}' \
            -- "$lcur" ) )
    else
        COMPREPLY=( $( compgen -W '${COMPREPLY[@]}' -- "$lcur" ) )
    fi
    if ((${#COMPREPLY[@]} == 1)); then
        if [[ $str_lprefix || x$str_action = xtest ]]; then
           COMPREPLY=( ${COMPREPLY[*]}, )
       else
           COMPREPLY=( ${COMPREPLY[*]}, ${COMPREPLY[*]}- )
       fi
    fi
    __ltrim_colon_completions "$str_lprefix$lcur"
elif [[ $lcur = *,* ]]; then
    str_lprefix="${lcur}" lcur="${lcur#*,}" str_var=""
    str_lprefix="${str_lprefix%"$lcur"}"
    if [[ $lcur = physdev:* ]]; then
        lcur="${lcur#physdev:}"
        str_lprefix="${str_lprefix}physdev:"
    else
        str_var="physdev:"
    fi
    COMPREPLY+=( $( compgen -P "$str_lprefix" -W \
        '${str_var} $(_ipset_get_ifnames)' -- "$lcur" ) )
    [[ ${COMPREPLY[0]} = *physdev: ]] && compopt -o nospace
    __ltrim_colon_completions "$str_lprefix"
fi
}

_ipset_complete_host_spec() {
local lcur="$1" str_lprefix="" str_lsuffix=""
local -i no_range=0 v4_only=0
if [[ $lcur = *,* && $str_type = hash:ip,mark ]]; then
    return 0
fi
shift
compopt -o nospace
while (($#)); do
    [[ $1 = --no-range ]] && no_range=1
    [[ $1 = --v4 ]] && v4_only=1
    shift
done
# range spec
if [[ $lcur = @(""|+([[:word:]])) ]]; then # empty or [:word:]
    str_lsuffix="-"
elif [[ $lcur = [[]*-*[]] ]]; then # host with hyphen
    str_lsuffix="-"
elif [[ $lcur = [[]*([!]]) ]]; then # incomplete host with dash
    str_lsuffix="-"
elif [[ $lcur = *-[[]+([!]]) ]]; then # incomplete range - host with dash
    str_lprefix="${lcur%\-[*}-"
    lcur="${lcur#"$str_lprefix"}"
elif [[ $lcur = \[*\]-* ]]; then # first part of hostname range
    str_lprefix="${lcur%\]-*}]-" lcur="${lcur##*\]-}"
elif [[ $lcur != *-* ]]; then # no hypen
    str_lsuffix="-"
else # ip-range
    str_lprefix="${lcur%-*}-" lcur="${lcur##*-}"
fi
if [[ $str_lprefix ]]; then
    # range not valid
       ((no_range)) && return 1
    # range not valid if first part is ip/cidr
    [[ $str_lprefix = */* ]] && return 1
fi
# ip-list from file
if [[ $str_lprefix ]]; then
    # only ipv4 range supported
    COMPREPLY+=( $( compgen -W '$(_ipset_get_iplist v4)' -- "$lcur" ) )
elif ((v4_only)); then
    # this type only supports ipv4
    COMPREPLY+=( $( compgen -W '$(_ipset_get_iplist v4)' -- "$lcur" ) )
else
    # we gather the family type
    COMPREPLY+=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$lcur" ) )
    __ltrim_colon_completions "$lcur"
fi
_ipset_complete_hostnames "$lcur"
if [[ $str_lprefix ]]; then
    # if the prefix is defined add it to compreply
    COMPREPLY=( $( compgen -P "$str_lprefix" -W '${COMPREPLY[@]}' -- "$lcur" ) )
else
    # add networks for hash:net?(,net), hash:ip,mark, or bitmap:ip for add/del action
    if [[ $str_type = hash:@(net?(,net)|ip,mark) ]] || \
        [[ $str_type = bitmap:*  && $str_action = @(add|create|del) ]]
    then
        COMPREPLY+=( $( compgen -W '$(_ipset_get_networks)' -- "$lcur" ) )
    fi
fi
if ((${#COMPREPLY[@]} == 1)); then
    if [[ $str_lprefix ]]; then
        # we can add a space, if it's a range (not with hash:net,net or hash:ip,mark)
        if [[ $str_type != hash:@(net,net|ip,mark) ]]; then
            compopt +o nospace
        fi
    fi
fi
}

_ipset_complete_hostport_spec() {
# complete on host,proto:port[,host] spec
local str_proto str_glob2 str_lprefix lcur str_lprefix2 lcur2
local lcur="$1"
if [[ $str_type = hash:@(ip|net),port,@(ip|net) ]]; then str_suffix=','
else str_suffix=''
fi
str_regex='^[^,]+,([^,]+)?$'
if [[ $lcur != *,* ]]; then
    str_lprefix="" str_suffix=""
    compopt -o nospace
    if [[ $str_type = hash:@(ip,port|net,port|ip,port,ip|ip,port,net|net,port,net) && \
        $str_action = @(add|del|test) ]]
    then
        # range spec
        if [[ $lcur = @(""|+([[:word:]])) ]]; then # empty or [:word:]
            str_suffix="-"
        elif [[ $lcur = [[]*-*[]] ]]; then # host with hyphen
            str_suffix="-"
        elif [[ $lcur = [[]*([!]]) ]]; then # incomplete host with dash
            str_suffix="-"
        elif [[ $lcur = *-[[]+([!]]) ]]; then # incomplete range - host with dash
            str_lprefix="${lcur%\-[*}-"
            lcur="${lcur#"$str_lprefix"}"
        elif [[ $lcur = \[*\]-* ]]; then # first part of hostname range
            str_lprefix="${lcur%\]-*}]-" lcur="${lcur##*\]-}"
        elif [[ $lcur != *-* ]]; then # no hypen
            str_suffix="-"
        else # ip-range
            str_lprefix="${lcur%-*}-" lcur="${lcur##*-}"
        fi
    fi
    # ip-list from file
    COMPREPLY+=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$lcur" ) )
    if [[ $str_type = hash:net,port?(,net) ]]; then
        COMPREPLY+=( $( compgen -W '$(_ipset_get_networks)' -- "$lcur" ) )
        __ltrim_colon_completions "$lcur"
    fi
    _ipset_complete_hostnames "$lcur"
    if [[ $str_lprefix ]]; then # range spec
        COMPREPLY=( $( compgen -P "$str_lprefix" -W '${COMPREPLY[@]}' -- "$lcur" ) )
    fi
    if ((${#COMPREPLY[@]} == 1)); then
        if [[ $str_suffix = - ]]; then
            COMPREPLY=( $( compgen -W '${COMPREPLY[*]}, ${COMPREPLY[*]}-' -- "$lcur" ) )
        else
            COMPREPLY=( ${COMPREPLY[*]}, )
        fi
    fi
    __ltrim_colon_completions "$str_lprefix$lcur"
elif [[ $lcur =~ $str_regex ]]; then
    compopt -o nospace
    str_glob='[^[]*-' # otherwise messes up my vim syntax highlightning
    str_regex='.*,(icmp|icmp6|tcp|sctp|udp|udplite):.*' # for compat put regex in var
    if [[ $lcur != *icmp* && \
        $lcur = *,@(?(tcp:|sctp:|udp:|udplite:)@(+([[:word:]])-|\[*-*\]-)|\[*-*\]-)* ]]
    then # range spec
        str_lprefix="$lcur" str_glob='*[[]*' str_glob2='*,*-\[*' str_proto="tcp" str_var=""
        [[ $lcur =~ .*(tcp|sctp|udp|udplite):.* ]] && str_proto=${BASH_REMATCH[1]}
        if [[ $lcur = *,*\[*-*\]-* ]]; then
            str_var="${lcur#*,*[}" lcur="${lcur##*\]-}"
            str_lprefix=${str_lprefix%"$lcur"} str_var="${str_var%\]*}"
        elif [[ $lcur = $str_glob2 ]]; then
            str_var="${lcur#*,}" lcur="${lcur##*-}"
            str_var="${str_var#${BASH_REMATCH[1]}:}"
            str_lprefix=${str_lprefix%"$lcur"} str_var="${str_var%%-*}"
        else
            str_var="${lcur#*,}" lcur="${lcur##*-}"
            str_var="${str_var#${BASH_REMATCH[1]}:}"
            str_lprefix=${str_lprefix%"$lcur"} str_var="${str_var%-*}"
        fi
        COMPREPLY+=( $( compgen -P "$str_lprefix" -S "$str_suffix" -W \
            '$(_ipset_get_services -p "$str_proto" -o "$str_var")' -- "$lcur") )
        if [[ $str_lprefix = *:* ]]; then
            str_lprefix="${str_lprefix%:*}:"
        fi
        __ltrim_colon_completions "${str_lprefix}"
        if ((${#COMPREPLY[@]} == 1)); then
            if [[ $str_lprefix && $str_type != hash:@(ip|net),port,@(ip|net) ]]; then
                compopt +o nospace
            fi
        fi
    elif [[ $lcur =~ $str_regex ]]; then
        # icmp[6] and services with (tcp|udp|sctp|udplite): prefix
        str_var=${BASH_REMATCH[1]}
        str_lprefix="${lcur}" lcur="${lcur#*,}"
        str_lprefix="${str_lprefix%"$lcur"}"
        lcur="${lcur#${BASH_REMATCH[1]}:}"
        str_lprefix="${str_lprefix}${BASH_REMATCH[1]}:"
        if [[ $str_var = icmp ]]; then
            COMPREPLY+=( $( compgen -P "$str_lprefix" -S "$str_suffix" -W \
                '${arr_icmp_types[@]}' -- "$lcur" ) )
        elif [[ $str_var = icmp6 ]]; then
            COMPREPLY+=( $( compgen -P "$str_lprefix" -S "$str_suffix" -W \
                '${arr_icmp6_types[@]}' -- "$lcur" ) )
        elif [[ $str_var = @(tcp|udp|sctp|udplite) ]]; then
            COMPREPLY+=( $( compgen -P "$str_lprefix" -W \
                '$(_ipset_get_services -p $str_var)' -- "$lcur" ) )
        fi
        __ltrim_colon_completions "$str_lprefix"
    elif [[ $lcur = *,* ]]; then # first attempt :/ long list
        str_lprefix="${lcur%,*}," lcur="${lcur#*,}"
        str_var="tcp: udp: sctp: udplite: icmp: icmp6:"
        # add the services
        COMPREPLY+=( $( compgen -P "$str_lprefix" -W \
            '$str_var $(_ipset_get_services)' -- "$lcur" ) )
        # add the protocols
        COMPREPLY+=( $( compgen -P "$str_lprefix" -S ":0$str_suffix" -W \
            '$(_ipset_get_protocols)' -- "$lcur" ) )
        __ltrim_colon_completions "$str_lprefix$lcur"
        compopt -o nospace
    fi
elif [[ $lcur = *,*,* && $str_type = hash:@(ip,port,@(ip|net)|net,port,net) ]]; then
    str_lprefix2="${lcur}" lcur2="${lcur##*,}"
    str_lprefix2="${str_lprefix2%"$lcur2"}"
    lcur="$lcur2"
    # ip-list from file
    COMPREPLY+=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$lcur2" ) )
    if [[ $str_type = hash:@(ip|net),port,net && x$str_action != xtest ]]; then
        # range spec
        if [[ $lcur = @(""|+([[:word:]])) ]]; then # empty or [:word:]
            str_suffix="-"
        elif [[ $lcur = [[]*-*[]] ]]; then # host with hyphen
            str_suffix="-"
        elif [[ $lcur = [[]+([!]]) ]]; then # incomplete host with dash
            str_suffix="-"
        elif [[ $lcur = *-[[]+([!]]) ]]; then # incomplete range - host with dash
            str_lprefix="${lcur%\-[*}-"
            lcur="${lcur#"$str_lprefix"}"
        elif [[ $lcur = \[*\]-* ]]; then # first part of hostname range
            str_lprefix="${lcur%\]-*}]-" lcur="${lcur##*\]-}"
        elif [[ $lcur != *-* ]]; then # no hypen
            str_suffix="-"
        else # ip-range
            str_lprefix="${lcur%-*}-" lcur="${lcur##*-}"
        fi
        # networks
        COMPREPLY+=( $( compgen -W '$(_ipset_get_networks)' -- "$lcur" ) )
    fi
    _ipset_complete_hostnames "$lcur"
    if [[ $str_lprefix ]]; then
        COMPREPLY=( $( compgen -P "$str_lprefix" \
            -W '${COMPREPLY[@]}' -- "$lcur" ) )
    fi
    if [[ $str_lprefix2 ]]; then
        COMPREPLY=( $( compgen -P "$str_lprefix2" \
            -W '${COMPREPLY[@]}' -- "$lcur2" ) )
    fi
    __ltrim_colon_completions "$str_lprefix2$lcur2"
    if ((${#COMPREPLY[@]} == 1)); then
        if [[ $str_type = hash:@(ip|net),port,net && \
            ${COMPREPLY[*]##*,} != */* ]]
        then
            compopt -o nospace
        fi
    fi
fi
}

_ipset_complete_netnet_spec() {
# complete hash:net,net sets
local lcur="$1"
if [[ $lcur = *,* ]]; then
    str_lprefix="$lcur" lcur="${lcur#*,}"
    str_lprefix="${str_lprefix%,*},"
    _ipset_complete_host_spec "$lcur"
    compopt -o nospace
    COMPREPLY+=( $( compgen -P "$str_lprefix" -W '${COMPREPLY[@]}' -- "$lcur" ) )
    if ((${#COMPREPLY[@]} == 1 )); then
        str_glob='@(*/*|\[*\]-*|+([![])-*)'
        [[ ${COMPREPLY[0]#*,} = $str_glob ]] && compopt +o nospace
    fi
else
    _ipset_complete_host_spec "$lcur"
    compopt -o nospace
    if ((${#COMPREPLY[@]} == 1 )); then
        str_glob='@(*/*|\[*\]-\[*\]|+([![])-+([![])|\[*\]-+([![])|+([![])-\[*\])'
        if [[ ${COMPREPLY[0]} = $str_glob ]]; then
            COMPREPLY=( ${COMPREPLY[*]}, )
        else
            COMPREPLY=( ${COMPREPLY[*]}- ${COMPREPLY[*]}, )
        fi
    fi
fi
}

_ipset_complete_mac_spec() {
local lcur="$1" mac rest a b addr str_tmp
local str_regex='^([[:xdigit:]]{2})(:[[:xdigit:]]{2}){5}$'
local -i x=y=0
if [[ ${_IPSET_MAC_COMPL_MODE:=both} = both ]]; then
    x=1 y=1
elif [[ $_IPSET_MAC_COMPL_MODE = file ]]; then
    x=1
elif [[ $_IPSET_MAC_COMPL_MODE = system ]]; then
    y=1
fi
if ((x)); then
    if [[ $_IPSET_MACLIST_FILE && -r $_IPSET_MACLIST_FILE ]]; then
        # if a file with mac addresses is in env var, load em
        while read -r mac rest; do
            [[ $mac = *([[:blank:]])\#* ]] && continue
            mac="${mac//\#*/}"
            [[ $mac =~ $str_regex ]] && printf "%s\n" "$mac"
        done < "${_IPSET_MACLIST_FILE}"
    fi
fi
if ((y)); then
    # read arp cache, addresses of local interfaces and /etc/ethers
    str_tmp=$(while read a b addr rest; do
        [[ $addr =~ $str_regex ]] && printf "%s\n" "$addr"
        done < <(PATH=$PATH:/sbin command arp -n 2>/dev/null))
    str_tmp+=" $(while read -r; do
        [[ $REPLY = *link/loopback* ]] && continue
        REPLY=${REPLY#*link/*+([[:blank:]])}
        REPLY=${REPLY%+([[:blank:]])brd*}
        [[ $REPLY =~ $str_regex ]] && printf "%s\n" "$REPLY"
        done < <(PATH=$PATH:/sbin command ip -o link show 2>/dev/null))"
    if [[ -r /etc/ethers ]]; then
        str_tmp+=" $(while read -r addr rest; do
            [[ $addr =~ $str_regex ]] && printf "%s\n" "$addr"
            done < /etc/ethers)"
    fi
    printf "%s\n" "$str_tmp"
fi
}

# -----------------------------------------------------------------
# Main
# -----------------------------------------------------------------

_ipset_complete() {
# at least bash 4 is required
((${BASH_VERSINFO[0]} < 4)) && return 0
local cur prev cword words ips_version
local str_action str_setname str_type str_filename
local str_glob str_regex str_prefix str_suffix
local str_tmp="" str_var=""
local str_timeout="timeout" str_order="before after" str_forceadd=""
local str_counters="" str_bp_counters="" str_comment="" str_markmask=""
local str_skbinfo="" str_skbflags=""
local -i i=x=y=0
local -i got_bashcompl=got_action=action_index=order_index=set_has_timeout=0
local -i got_bp_proto=0
local -i ignore_errors=use_file=names_only=headers_only=save_format=res_sort=0
local arr_sets=() arr_types=() arr_members=()
local arr_dupe_cmd_opts=() arr_used_opts=() arr_tmp=()
local arr_opts=(
"-! -exist"
"-o -output"
"-q -quiet"
"-r -resolve"
"-s -sorted"
"-n -name"
"-t -terse"
"-f -file"
)
local arr_icmp_types=(
echo-reply
pong
network-unreachable
host-unreachable
protocol-unreachable
port-unreachable
fragmentation-needed
source-route-failed
network-unknown
host-unknown
network-prohibited
host-prohibited
TOS-network-unreachable
TOS-host-unreachable
communication-prohibited
host-precedence-violation
precedence-cutoff
source-quench
network-redirect
host-redirect
TOS-network-redirect
TOS-host-redirect
echo-request
ping
router-advertisement
router-solicitation
ttl-zero-during-transit
ttl-zero-during-reassembly
ip-header-bad
required-option-missing
timestamp-request
timestamp-reply
address-mask-request
address-mask-reply
)
local arr_icmp6_types=(
no-route
communication-prohibited
address-unreachable
port-unreachable
packet-too-big
ttl-zero-during-transit
ttl-zero-during-reassembly
bad-header
unknown-header-type
unknown-option
echo-request
ping
echo-reply
pong
router-solicitation
router-advertisement
neighbour-solicitation
neigbour-solicitation
neighbour-advertisement
neigbour-advertisement
redirect
)

COMPREPLY=()

# expecting _get_comp_words_by_ref() to exist from bash_completion
if declare -f _get_comp_words_by_ref &>/dev/null; then got_bashcompl=1
    _get_comp_words_by_ref -n : cur prev cword words || return
else got_bashcompl=0 # not so neat, but a workaround
    COMP_WORDBREAKS="${COMP_WORDBREAKS//:/}"
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    cword=$COMP_CWORD
    for i in ${!COMP_WORDS[@]}; do words[i]="${COMP_WORDS[i]}"; done
fi

# ipset version check 6.x upwards (to v?) is supported

# All calls of ipset should be done in a subshell with stderr
# pointing to /dev/null, to avoid printing of
# `-bash command ipset not found' errors

i=0 # for safety
if ((UID != 0)); then # not root user
    "${words[0]}" version &>/dev/null # can we retrieve the version?
    i=$?
fi
if ((i == 0)); then
    ips_version="$("${words[0]}" version)"
    ips_version="${ips_version#ipset v}"
    ips_version="${ips_version%,+([[:blank:]])protocol*}"
    read -a ips_version <<< ${ips_version//./ }
    [[ ${ips_version[0]} = +([[:digit:]]) ]] || return 1
else
    # assume we have no permissions to run ipset
    # set version to 6.22 = show all features
    # though many things won't work, as of missing permissions
    ips_version=( 6 22 )
fi
((ips_version[0] < 6)) && return 1


# ipset -ge v6.19 has counters flag
# ipset -ge v6.20 has comment flag
# ipset -ge v6.21 has hash:ip,mark markmask flag
# ipset -ge v6.22 has skbinfo flag
if ((ips_version[0] > 6)); then
    str_counters="counters"
    str_bp_counters="bytes packets"
    str_comment="comment"
    str_markmask="markmask"
    str_skbinfo="skbinfo" str_skbflags="skbmark skbprio skbqueue"
    got_bp_proto=1
elif ((ips_version[0] == 6)); then
    if ((ips_version[1] >= 22)); then
        str_comment="comment"
        str_markmask="markmask"
        str_forceadd="forceadd"
        str_skbinfo="skbinfo" str_skbflags="skbmark skbprio skbqueue"
        got_bp_proto=1
    elif ((ips_version[1] >= 21)); then
        str_comment="comment"
        str_markmask="markmask"
        str_forceadd="forceadd"
        got_bp_proto=1
    elif ((ips_version[1] >= 20)); then
        str_comment="comment"
        got_bp_proto=1
    elif ((ips_version[1] >= 19)); then
        str_counters="counters"
        str_bp_counters="bytes packets"
    fi
else
    # ipset versions -lt 6 are not supported
    return 0
fi

# construct own known_hosts function from origin
# just remove the __ltrim_colon_completions call
# to avoid unwanted ltrim if we need to work with the list of hosts
# ugly hack - gimme better ;p
if ((got_bashcompl)); then
	if ! declare -F _ipset_known_hosts &>/dev/null; then
	eval '_ipset_known_hosts() { '$(declare -f _known_hosts_real | \
		grep -v __ltrim_colon_completions | \
		grep -Ev "^_known_hosts_real.*$" | grep -Ev "^(\{|\})")'; }'
	fi
fi

if [[ $_DEBUG_NF_COMPLETION ]]; then
    printf "\nCOMP_WORDBREAKS: <%s>\n" "$COMP_WORDBREAKS"
    printf "COMP_LINE: <%s>\n" "$COMP_LINE"
    printf "COMP_TYPE: <%s>\n" "$COMP_TYPE"
    printf "COMP_POINT: <%s>\n" "$COMP_POINT"
    printf "COMP_KEY: <%s>\n" "$COMP_KEY"
    printf "COMP_CWORD: <%s>\n" "$COMP_CWORD"
    printf "cword: <%s>\n" "$cword"
    printf "cur: <%s> prev: <%s>\n" "$cur" "$prev"
    printf "words:\n" "<%s>\n" "${words[@]}"
fi

# collect information about used options
for ((i=1; i < ${#words[@]}-1; i++)); do
if [[ ${words[i]} = @(create|n|add|del|test|destroy|x|list|save|restore|flush|rename|e|swap|w|help|version) ]]
then
    [[ ${words[i-1]} = @(-f|-file) ]] && continue # could be a file named like a command
    if ! ((got_action)); then
        if [[ ${words[i]} != save ]]; then
            got_action=1 action_index=$i str_action=${words[i]}
        elif [[ ${words[i-1]} != @(-o|-output) ]]; then
            got_action=1 action_index=$i str_action=${words[i]}
        fi
        if [[ $str_action = @(create|n|add|del|test|destroy|x|list|save|restore|flush|rename|e|swap|w) ]]
        then
            str_setname=${words[i+1]} # register the set name
        fi
    fi
elif [[ ${words[i]} = @(-\!|-exist) ]]; then
    if [[ ${words[i-1]} != @(-f|-file) ]]; then
        ignore_errors=1 arr_used_opts+=(${words[i]})
    fi
elif [[ ${words[i]} = @(-f|-file) ]]; then
    if [[ ${words[i-1]} != @(-f|-file) ]]; then
        use_file=1 str_filename="${words[i+1]}" arr_used_opts+=(${words[i]})
    fi
elif [[ ${words[i]} = @(-n|-name) ]]; then
    if [[ ${words[i-1]} != @(-f|-file) ]]; then
        names_only=1 arr_used_opts+=(${words[i]})
    fi
elif [[ ${words[i]} = @(-t|-terse) ]]; then
    if [[ ${words[i-1]} != @(-f|-file) ]]; then
        headers_only=1 arr_used_opts+=(${words[i]})
    fi
elif [[ ${words[i]} = @(-o|-output) ]]; then
    if [[ ${words[i-1]} != @(-f|-file) ]]; then
        arr_used_opts+=(${words[i]})
        if [[ $prev = @(-o|-output) ]]; then
            save_format=2 # expecting opt-arg
        elif [[ ${words[i+1]} = save ]]; then
            save_format=3 # no -n/-t with -o save
        else
            save_format=1
        fi
    fi
elif [[ ${words[i]} = @(-r|-resolve|-s|-sorted) ]]; then
    if [[ ${words[i-1]} != @(-f|-file) ]]; then
        res_sort=1 arr_used_opts+=(${words[i]})
    fi
elif [[ ${words[i]} = @(-q|-quiet) ]]; then
    arr_used_opts+=(${words[i]})
elif [[ ${words[i]} = @(before|after) ]]; then
    if ((got_action && ! order_index && i == action_index+3)); then
        order_index=$i str_order=""
    fi
elif [[ ${words[i]} = @(timeout|range|maxelem|family|hashsize|size|netmask|nomatch|counters|bytes|packets|comment|markmask|forceadd|skbinfo|skbmark|skbprio|skbqueue) ]]
then
    if ((got_action && i > action_index+2)); then
        str_tmp="$COMP_LINE"
        [[ $str_setname = ${words[i]} ]] && str_tmp="${str_tmp/${words[i]}/}"
        [[ $str_filename = ${words[i]} ]] && str_tmp="${str_tmp/${words[i]}/}"
        [[ $str_tmp = *${words[i]}* ]] && arr_dupe_cmd_opts[${#arr_dupe_cmd_opts[@]}]="${words[i]}"
    fi
fi
done

if [[ $_DEBUG_NF_COMPLETION ]]; then
    printf "\ngot_action: <%s>\n" "$got_action"
    printf "str_action: <%s>\n" "$str_action"
    printf "action_index: <%s>\n" "$action_index"
    printf "order_index: <%s>\n" "$order_index"
    printf "str_setname: <%s>\n" "$str_setname"
    printf "str_filename: <%s>\n" "$str_filename"
    printf "save_format: <%s>\n" "$save_format"
    printf "ignore_errors: <%s>\n" "$ignore_errors"
    printf "names_only: <%s>\n" "$names_only"
    printf "headers_only: <%s>\n" "$headers_only"
    printf "arr_used_opts: <%s>\n" "${arr_used_opts[@]}"
    printf "arr_dupe_cmd_opts: <%s>\n" "${arr_dupe_cmd_opts[@]}"
fi

# invalid combination of options
if ((names_only && headers_only)); then
    return 0
elif ((names_only || headers_only)); then
    if ((res_sort || ignore_errors)) || ((save_format == 3)); then
        return 0
    fi
elif ((ignore_errors)); then
    if ((res_sort || save_format)); then
        return 0
    fi
fi

# catch variables and command substitution
if [[ $cur == \$\(* ]]; then # command substitution
    COMPREPLY=( $(compgen -c -P '$(' ${cur#??}) )
    return 0
elif [[ $cur == \$\{* ]]; then # variables with a leading `${'
    COMPREPLY=( $(compgen -v -P '${' -S '}' ${cur#??}) )
    return 0
elif [[ $cur == \$* ]]; then # variables with a leading `$'
    COMPREPLY=( $(compgen -v -P '$' ${cur#?} ) )
    return 0
fi

# depend on previous option
if [[ $prev = @(-o|-output) ]]; then
    # make sure it's not a filename named -o or -output
    if [[ $str_filename != $prev ]]; then
        if ((names_only || headers_only)); then
            COMPREPLY=( $( compgen -W 'plain xml' -- "$cur" ) )
        else
            COMPREPLY=( $( compgen -W 'plain save xml' -- "$cur" ) )
        fi
        return 0
    fi
elif [[ $prev = @(-f|-file|\<|\>) ]]; then
    if ((got_bashcompl)); then
        _filedir
    else
        compopt -o nospace
        COMPREPLY=( $( compgen -f -- "$cur" ) )
    fi
    return 0
fi

if ((got_action)); then # we got the main action
# Disallow sets with names of options starting with a hyphen
if [[ $str_setname = -?* && $cur != -?* && \
    $str_action = @(create|n|add|del|test|rename|e|swap|w) ]]
then
    for x in ${!arr_opts[@]}; do set -- ${arr_opts[x]}
        [[ $str_setname = @($1|$2) ]] && return 0
    done
fi
if ((cword == action_index+1)) && [[ $str_action = $prev ]]; then
    # depend on previous option which should be the action
    # create|n|version - take no aktion
    if [[ $str_action = help ]]; then
        _ipset_get_supported_types
        COMPREPLY=( $( compgen -W '${arr_types[@]}' -- "$cur" ) )
        __ltrim_colon_completions "$cur"
    elif [[ $str_action = @(add|del|rename|e|swap|w|test) ]]; then
        COMPREPLY=( $( compgen -W '$( ( "${words[0]}" list -n ) 2>/dev/null )' -- "$cur" ) )
        __ltrim_colon_completions "$cur"
    elif [[ $str_action = @(list|flush|save|destroy|x) ]]; then
        # we don't know if its an option request, could also be a set
        # named `-*', if the latter is true, show sets and options
        if [[ $cur = -* ]]; then
            _ipset_get_options
            if _ipset_is_set "${cur}*"; then
                 COMPREPLY=( $( compgen -W '${arr_sets[@]}' -- "$cur" ) )
                __ltrim_colon_completions "$cur"
            fi
        else
            COMPREPLY=( $( compgen -W '$( ( "${words[0]}" list -n ) 2>/dev/null )' -- "$cur" ) )
            __ltrim_colon_completions "$cur"
        fi
    elif [[ $str_action = restore ]]; then
        if [[ $cur = -* ]]; then
            _ipset_get_options
        elif ! [[ $str_filename ]]; then
            # don't show redirector if we have option -f
            COMPREPLY=( \< )
        fi
    fi
elif ((cword == action_index+2)) && [[ $str_setname = $prev ]]; then
    # rename|e - take no aktion
    if [[ $str_action = @(save|restore|list|flush|destroy|x) ]]; then
        if [[ $cur = -* ]]; then
            _ipset_get_options
        fi
    elif [[ $str_action = @(create|n) ]]; then
        _ipset_get_supported_types
        COMPREPLY=( $( compgen -W '${arr_types[@]}' -- "$cur" ) )
        __ltrim_colon_completions "$cur"
    elif [[ $str_action = @(swap|w) ]]; then # list two sets
        COMPREPLY=( $( compgen -W '$( ( "${words[0]}" list -n ) 2>/dev/null )' -- "$cur" ) )
        for i in ${!COMPREPLY[@]}; do # remove the dupe setname from the list
            [[ ${COMPREPLY[i]} = $str_setname ]] && unset COMPREPLY[i] && break
        done
        __ltrim_colon_completions "$cur"
    elif [[ $str_action = add ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if [[ $str_type = bitmap:ip ]]; then
            _ipset_complete_host_spec "$cur" --v4
            __ltrim_colon_completions "$cur"
        elif [[ $str_type = @(hash:ip|hash:net|hash:ip,mark) ]]; then
            _ipset_complete_host_spec "$cur"
            __ltrim_colon_completions "$cur"
        elif [[ $str_type = hash:net,iface ]]; then
            _ipset_complete_iface_spec "$cur"
        elif [[ $str_type = hash:@(ip,port|ip,port,ip|ip,port,net|net,port|net,port,net) ]]
        then
            _ipset_complete_hostport_spec "$cur"
        elif [[ $str_type = hash:net,net ]]; then
            _ipset_complete_netnet_spec "$cur"
            __ltrim_colon_completions "$cur"
        elif [[ $str_type = hash:mac ]]; then
            COMPREPLY=( $( compgen -W '$(_ipset_complete_mac_spec)' -- "$cur" ) )
            __ltrim_colon_completions "$cur"
        elif [[ $str_type = bitmap:ip,mac ]]; then
            if [[ $cur = *,* ]]; then
                str_prefix="$cur" cur="${cur#*,}"
                str_prefix="${str_prefix%$cur}"
                COMPREPLY+=( $( compgen -P "$str_prefix" -W '$(_ipset_complete_mac_spec)' \
                    -- "$cur" ) )
                __ltrim_colon_completions "$str_prefix$cur"
            else
                compopt -o nospace
                _ipset_complete_host_spec "$cur" --v4 --no-range
                __ltrim_colon_completions "$cur"
                if ((${#COMPREPLY[@]} == 1)); then
                    COMPREPLY=( ${COMPREPLY[*]}, )
                fi
            fi
        elif [[ $str_type = bitmap:port ]]; then # complete port [range]
            _ipset_complete_portrange "$cur"
        elif [[ $str_type = list:* ]]; then
            # show sets if the set to add is of type list:set
            arr_tmp=() arr_sets=( $( ( "${words[0]}" list -n ) 2>/dev/null ) )
            _ipset_get_members --names-only "$str_setname"
            for x in ${!arr_sets[@]}; do
                [[ ${arr_sets[x]} = $str_setname ]] && continue
                for y in ${!arr_members[@]}; do
                    [[ ${arr_sets[x]} = ${arr_members[y]} ]] && continue 2
                done
                arr_tmp+=("${arr_sets[x]}")
            done
            COMPREPLY=( $( compgen -W '${arr_tmp[@]}' -- "$cur" ) )
            __ltrim_colon_completions "$cur"
        fi
    elif [[ $str_action = del ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if [[ $str_type = bitmap:ip ]]; then
            str_prefix=""
            if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur"
            elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                _ipset_complete_host_spec "$cur" --v4
                __ltrim_colon_completions "$cur"
            else
                _ipset_complete_host_spec "$cur" --v4
                _ipset_complete_elements "$cur"
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = bitmap:port ]]; then
            str_prefix=""
            if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur"
            elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                _ipset_complete_portrange "$cur"
            else
                _ipset_complete_portrange "$cur"
                _ipset_get_members --names-only "$str_setname"
                str_glob='?(tcp:|udp:)@([![]*-*|\[?*\]-*)'
                if [[ $cur = $str_glob ]]; then
                    str_var="${cur#?(tcp:|udp:)}" # offset
                    str_tmp="${cur%"$str_var"}" # proto
                    # identify service number by name, to find the offset
                    if [[ $str_var != +([[:digit:]]) ]]; then
                        if [[ $str_var = \[+([![])\]-* ]]; then
                            str_var="${str_var%%\]*}"
                            str_var="${str_var#\[}"
                        elif  [[ $str_var = *-* ]]; then
                            str_var="${str_var%%-*}"
                        fi
                        str_var=$(_ipset_get_svnum -p "${str_tmp:-all}" -o "$str_var")
                    fi
                    if [[ $str_var = +([[:digit:]]) ]]; then
                        for i in ${!arr_members[@]}; do
                            ((${arr_members[i]} <= $str_var)) && \
                                unset arr_members[i] || break
                        done
                    fi
                    str_prefix="${cur%-*}-" cur="${cur##*-}"
                fi
                COMPREPLY+=( $( compgen -P "$str_prefix" -W '${arr_members[@]}' -- "$cur" ) )
            fi
        elif [[ $str_type = bitmap:ip,mac ]]; then
            str_prefix=""
            if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                _ipset_complete_host_spec "$cur" --v4 --no-range
                __ltrim_colon_completions "$cur"
            else
                _ipset_complete_host_spec "$cur" --v4 --no-range
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = hash:@(ip?(,mark)|net) ]]; then
            str_prefix=""
            if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur"
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                _ipset_complete_host_spec "$cur"
                __ltrim_colon_completions "$cur"
            else
                _ipset_complete_host_spec "$cur"
                _ipset_complete_elements "$cur"
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = hash:net,net ]]; then
            if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur"
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                _ipset_complete_netnet_spec "$cur"
                __ltrim_colon_completions "$cur"
            else
                _ipset_complete_netnet_spec "$cur"
                _ipset_complete_elements "$cur"
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = hash:@(ip,port|ip,port,ip|ip,port,net|net,port|net,port,net) ]]
        then
            if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                _ipset_complete_hostport_spec "$cur"
            else
                _ipset_complete_elements "$cur" --no-range
                _ipset_complete_hostport_spec "$cur"
                __ltrim_colon_completions "$cur"
            fi
        elif [[  $str_type = hash:net,iface ]]; then
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                _ipset_complete_iface_spec "$cur"
            else
                _ipset_complete_elements "$cur" --no-range
                _ipset_complete_iface_spec "$cur"
                __ltrim_colon_completions "$cur"
            fi
        else
            _ipset_complete_elements "$cur" --no-range
            __ltrim_colon_completions "$cur"
        fi
    elif [[ $str_action = test ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if [[ $str_type = bitmap:ip ]]; then
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                _ipset_complete_host_spec "$cur" --no-range --v4
            else
                _ipset_complete_elements "$cur" --no-range
                if ! _ipset_complete_host_spec "$cur" --no-range --v4; then
                    COMPREPLY=()
                fi
            fi
        elif [[ $str_type = hash:ip?(,mark) ]]; then
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                _ipset_complete_host_spec "$cur" --no-range
                __ltrim_colon_completions "$cur"
            else
                _ipset_complete_elements "$cur" --no-range
                if ! _ipset_complete_host_spec "$cur" --no-range; then
                    COMPREPLY=()
                fi
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = hash:net ]]; then
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                _ipset_complete_host_spec "$cur"
                __ltrim_colon_completions "$cur"
            else
                _ipset_complete_elements "$cur" --no-range
                if ! _ipset_complete_host_spec "$cur"; then
                    COMPREPLY=()
                fi
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = hash:@(ip,port|ip,port,ip|ip,port,net|net,port|net,port,net) ]]
        then
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                _ipset_complete_hostport_spec "$cur"
            else
                _ipset_complete_elements "$cur" --no-range
                _ipset_complete_hostport_spec "$cur"
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = hash:net,iface ]]; then
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                _ipset_complete_iface_spec "$cur"
            else
                _ipset_complete_elements "$cur" --no-range
                _ipset_complete_iface_spec "$cur"
                __ltrim_colon_completions "$cur"
            fi
        elif [[ $str_type = bitmap:port ]]; then
            str_prefix="" str_tmp="$cur"
            if [[ $cur = @(tcp|udp):* ]]; then
                ((got_bp_proto)) || return 0 # supported since ipset v6.20
                str_prefix="${cur%:*}"
                str_tmp="${str_tmp#${str_prefix}:}"
            fi
            if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                if ((got_bp_proto)); then # supported since ipset v6.20
                    COMPREPLY=( $(compgen -W \
                        'tcp: udp: $(_ipset_get_services -p "$str_prefix")' -- "$str_tmp" ) )
                    [[ ${COMPREPLY[*]} = @(tcp|udp): ]] && compopt -o nospace
                    __ltrim_colon_completions "$cur"
                else # only tcp services prior to ipset v6.20
                    COMPREPLY=( $(compgen \
                        -W '$(_ipset_get_services -p tcp)' -- "$cur" ) )
                fi
            else
                if ((got_bp_proto)); then # supported since ipset v6.20
                    COMPREPLY=( $(compgen -W \
                        'tcp: udp: $(_ipset_get_services -p "$str_prefix")' -- "$str_tmp" ) )
                    [[ ${COMPREPLY[*]} = @(tcp|udp): ]] && compopt -o nospace
                    __ltrim_colon_completions "$cur"
                else # only tcp services prior to ipset v6.20
                    COMPREPLY=( $(compgen -W '$(_ipset_get_services -p tcp)' -- "$cur" ) )
                fi
                _ipset_complete_elements "$cur" --no-range
                __ltrim_colon_completions "$cur"
            fi
        else
            _ipset_complete_elements "$cur" --no-range
            __ltrim_colon_completions "$cur"
        fi
    fi
elif ((cword == action_index+3)) && [[ $cur != -* ]]; then
    if [[ $str_action = add ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if _ipset_set_has_option timeout "$str_setname"; then
            str_timeout=timeout
        else
            str_timeout=""
        fi
        if ! _ipset_set_has_option counters "$str_setname"; then
            str_bp_counters=""
        fi
        if ! _ipset_set_has_option comment "$str_setname"; then
            str_comment=""
        fi
        if ! _ipset_set_has_option skbinfo "$str_setname"; then
            str_skbflags=""
        fi
        if [[ $str_type = hash:*net* ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts $str_timeout $str_bp_counters $str_comment $str_skbflags nomatch)' \
                -- "$cur" ) )
        elif [[ $str_type = @(hash:*!(net)*|bitmap:*) ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts $str_timeout $str_bp_counters $str_skbflags $str_comment)' \
                -- "$cur" ) )
        elif [[ $str_type = list:* ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts $str_order $str_timeout $str_bp_counters $str_skbflags $str_comment)' \
                -- "$cur" ) )
        fi
    elif [[ $str_action = @(create|n) ]]; then
        if [[ $prev = hash:ip,mark ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts family hashsize timeout maxelem $str_counters $str_skbinfo $str_markmask $str_comment $str_forceadd)' \
                -- "$cur" ) )
        elif [[ $prev = hash:* ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts family hashsize timeout maxelem $str_counters $str_skbinfo $str_comment $str_forceadd)' \
                -- "$cur" ) )
        elif [[ $prev = bitmap:ip ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts range netmask timeout $str_counters $str_skbinfo $str_comment)' \
            -- "$cur" ) )
        elif [[ $prev = bitmap:!(ip)?* ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts range timeout $str_counters $str_skbinfo $str_comment)' \
                -- "$cur" ) )
        elif [[ $prev = list:* ]]; then
            COMPREPLY=( $( compgen -W \
                '$(_ipset_dedupe_cmd_opts size timeout $str_counters $str_skbinfo $str_comment)' \
                -- "$cur" ) )
        fi
    elif [[ $str_action = @(del|test) ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if [[ $str_type = list:* ]]; then
            COMPREPLY=( $( compgen -W '$str_order' -- "$cur" ) )
        elif [[ $str_action = test && $str_type = hash:*net* ]]; then
            COMPREPLY=( $( compgen -W 'nomatch' -- "$cur" ) )
        fi
    fi
elif ((cword == action_index+3)) && [[ $cur = -* ]]; then
    _ipset_get_options
elif ((cword >= action_index+4)) && [[ $cur = -* ]]; then # add all following hyphen options
    if [[ $prev != @(timeout|hashsize|size|family|maxelem|range|netmask|before|after|bytes|packets|comment|markmask|skbmark|skbprio|skbqueue) ]]
    then
        _ipset_get_options
    fi
elif ((cword >= action_index+4)); then # add all following non-hyphen options
    if [[ $str_action = add ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if _ipset_set_has_option timeout "$str_setname"; then
            str_timeout=timeout
        else
            str_timeout=""
        fi
        if ! _ipset_set_has_option counters "$str_setname"; then
            str_bp_counters=""
        fi
        if ! _ipset_set_has_option comment "$str_setname"; then
            str_comment=""
        fi
        if ! _ipset_set_has_option skbinfo "$str_setname"; then
            str_skbflags=""
        fi
        # validate option argument values
        if [[ $_IPSET_VALIDATE_INPUT ]]; then
            for ((x=$action_index+3; x < ${#words[@]}; x++)); do
                if [[ ${words[x]} = @(timeout|bytes|packets) ]]; then
                    [[ ${words[x+1]} = @(+([[:digit:]])|0[xX]+([[:xdigit:]])) ]] || return 0
                elif [[ ${words[x]} = skbmark ]]; then
                    if [[ ${words[x+1]} = 0[xX]+([[:xdigit:]])?(/0[xX]+([[:xdigit:]])) ]]; then
                        (( ${words[x+1]%/*} >= 0 && ${words[x+1]%/*} <= 0xFFFFFFFF )) || return 0
                        (( ${words[x+1]#*/} >= 0 && ${words[x+1]#*/} <= 0xFFFFFFFF )) || return 0
                    else
                        return 0
                    fi
                elif [[ ${words[x]} = skbprio ]]; then
                    [[ ${words[x+1]} = +([[:xdigit:]]):?(+([[:xdigit:]])) ]] || return 0
                elif [[ ${words[x]} = skbqueue ]]; then
                    [[ ${words[x+1]} = +([[:digit:]]) ]] || return 0
                fi
            done
        fi
        if [[ $str_type = hash:*net* ]]; then
            if [[ $prev != @(timeout|bytes|packets|comment|skbmark|skbprio|skbqueue) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts $str_timeout $str_bp_counters $str_comment $str_skbflags nomatch)' \
                    -- "$cur" ) )
            fi
        elif [[ $str_type = @(hash:*!(net)*|bitmap:*) ]]; then
            if [[ $prev != @(timeout|bytes|packets|comment|skbmark|skbprio|skbqueue) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts $str_timeout $str_bp_counters $str_comment $str_skbflags)' \
                    -- "$cur" ) )
            fi
        elif [[ $str_type = list:* ]]; then
            if [[ $prev = @(before|after) ]] && ((cword-1 == order_index)); then
                _ipset_complete_elements "$cur"
                __ltrim_colon_completions "$cur"
            elif [[ $prev != @(timeout|bytes|packets|skbmark|skbprio|skbqueue) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts $str_order $str_timeout $str_bp_counters $str_comment $str_skbflags)' \
                    -- "$cur" ) )
            fi
        fi
    elif [[ $str_action = @(create|n) ]]; then
        # validate option argument values
        if [[ $_IPSET_VALIDATE_INPUT ]]; then
            for ((x=$action_index+3; x < ${#words[@]}; x++)); do
                if [[ ${words[x+1]} && ${words[x+1]} != $cur ]]; then
                    if [[ ${words[x]} = @(hashsize|timeout|size|maxelem|markmask) ]]; then
                        [[ ${words[x+1]} != @(+([[:digit:]])|0[xX]+([[:xdigit:]])) ]] && return 0
                    elif [[ ${words[x]} = family ]]; then
                        [[ ${words[x+1]} != inet?(6) ]] && return 0
                    elif [[ ${words[x]} = range ]]; then
                        if [[ $str_type = bitmap:port ]]; then
                            [[ ${words[x+1]} != *-* ]] && return 0
                        else
                            [[ ${words[x+1]} != @(*-*|*/+([[:digit:]])) ]] && return 0
                        fi
                    fi
                fi
            done
        fi
        if [[ ${words[action_index+2]} = hash:ip,mark ]]; then # must be the set type
            if [[ $prev = family ]]; then
                COMPREPLY=( $( compgen -W '$(_ipset_dedupe_cmd_opts inet inet6)' \
                    -- "$cur" ) )
            elif [[ $prev != @(hashsize|timeout|maxelem|markmask) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts family hashsize timeout maxelem $str_counters $str_markmask $str_comment $str_forceadd $str_skbinfo)' \
                    -- "$cur" ) )
            fi
        elif [[ ${words[action_index+2]} = hash:* ]]; then
            if [[ $prev = family ]]; then
                COMPREPLY=( $( compgen -W '$(_ipset_dedupe_cmd_opts inet inet6)' \
                    -- "$cur" ) )
            elif [[ $prev != @(hashsize|timeout|maxelem) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts family hashsize timeout maxelem $str_counters $str_comment $str_forceadd $str_skbinfo)' \
                    -- "$cur" ) )
            fi
        elif [[ ${words[action_index+2]} = bitmap:ip ]]; then
            if [[ $prev != @(range|netmask|timeout) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts range netmask timeout $str_counters $str_comment $str_skbinfo)' \
                    -- "$cur" ) )
            fi
        elif [[ ${words[action_index+2]} = bitmap:!(ip)?* ]]; then
            if [[ $prev != @(range|timeout) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts range timeout $str_counters $str_comment $str_skbinfo)' \
                    -- "$cur" ) )
            fi
        elif [[ ${words[action_index+2]} = list:* ]]; then
            if [[ $prev != @(size|timeout) ]]; then
                COMPREPLY=( $( compgen -W \
                    '$(_ipset_dedupe_cmd_opts size timeout $str_counters $str_comment $str_skbinfo)' \
                    -- "$cur" ) )
            fi
        fi
        if [[ ${words[action_index+2]} = bitmap:port && $prev = range ]]; then
            # complete port ranges
            _ipset_complete_portrange "$cur"
        elif [[ ${words[action_index+2]} = bitmap:* && $prev = range ]]; then
            str_prefix=""
            if [[ $cur = @(""|+([[:word:]])) ]]; then # empty or [:word:]
                :
            elif [[ $cur = [\[]*-*[\]] ]]; then # host with hyphen
                :
            elif [[ $cur = [[]*([!]]) ]]; then # incomplete host with dash
                :
            elif [[ $cur = *-[[]+([!]]) ]]; then # incomplete range - host with dash
                str_prefix="${cur%\-[*}-"
            elif [[ $cur = \[*\]-* ]]; then # first part of hostname range
                str_prefix="${cur%\]-*}]-"
            elif [[ $cur != *-* ]]; then # no hypen
                :
            else # ip-range
                str_prefix="${cur%-*}-"
            fi
            _ipset_complete_host_spec "$cur" --v4
            if ((${#COMPREPLY[@]} == 1)); then
                if [[ -z $str_prefix  && ${COMPREPLY[*]} != */* ]]; then
                    compopt -o nospace
                    COMPREPLY=( $( compgen -W '${COMPREPLY[*]}/ ${COMPREPLY[*]}-' -- "$cur" ) )
                fi
            fi
        fi
    elif [[ $str_action = @(del|test) ]]; then
        str_type=$(_ipset_get_set_type "$str_setname")
        if [[ $str_type = list:* ]]; then
            arr_tmp=()
            _ipset_get_members --names-only "$str_setname"
            if [[ $prev = @(before|after) ]] && ((cword-1 == order_index))
            then
                if [[ $prev = before ]]; then
                    for x in ${!arr_members[@]}; do
                        if [[ ${arr_members[x]} = ${words[action_index+2]} ]]
                        then
                            if [[ ${arr_members[x+1]} ]]; then
                                arr_tmp+=(${arr_members[x+1]})
                                break
                            fi
                        fi
                    done
                elif [[ $prev = after ]]; then
                    for x in ${!arr_members[@]}; do
                        if [[ ${arr_members[x]} = ${words[action_index+2]} ]]
                        then
                            if ((x>0)) && [[ ${arr_members[x-1]} ]]; then
                                arr_tmp+=(${arr_members[x-1]})
                                break
                            fi
                        fi
                    done
                fi
                COMPREPLY=( $( compgen -W '${arr_tmp[@]}' -- "$cur" ) )
                __ltrim_colon_completions "$cur"
            fi
        fi
    fi
fi
else # we don't have the main action yet
if [[ $prev = - ]] && ((cword == 2)); then
    return 0 # interactive mode, don't complete on anything further
fi
if [[ $cur = -* ]]; then # any option is requested
    _ipset_get_options
else
    # we don't have the action yet, check options to display appropiate actions
    if ((save_format && !headers_only && !names_only)); then
        COMPREPLY=( $( compgen -W 'list save' -- "$cur" ) )
    elif ((save_format || names_only || headers_only)); then
        COMPREPLY=( $( compgen -W 'list' -- "$cur" ) )
    elif ((res_sort)); then
        COMPREPLY=( $( compgen -W 'list save' -- "$cur" ) )
    elif ((ignore_errors && use_file)); then
        COMPREPLY=( $( compgen -W 'restore' -- "$cur" ) )
    elif ((ignore_errors)); then
        COMPREPLY=( $( compgen -W 'create n add del restore' -- "$cur" ) )
    elif ((use_file)); then
        COMPREPLY=( $( compgen -W 'list save restore' -- "$cur" ) )
    else
        COMPREPLY=( $( compgen -W 'create n add del test destroy x list save \
            restore flush rename e swap w help version' -- "$cur" ) )
    fi
fi
fi
if [[ $_DEBUG_NF_COMPLETION ]]; then
    printf "COMPREPLY:\n"
    printf "<%s>\n" "${COMPREPLY[@]}"
fi
}
complete -F _ipset_complete ipset