#!/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 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/>.

# -----------------------------------------------------------------
# Tested with ipset versions:
# 6.16.1
# -----------------------------------------------------------------
# Requirements:
#
# The bash completion package version 2.0 or greater is recommended.
# http://bash-completion.alioth.debian.org/
#
# 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:
#
# Put it into ~/.bash_completion or /etc/bash_completion.d/
#
# -----------------------------------------------------------------
#
# Version 2.0
#
# -----------------------------------------------------------------

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

_ipset_bash_default_compl() { # taken from examples - modified by me
# call with the word to be completed as $1
local t
if [[ $1 == \$\(* ]]; then # command substitution
    t=${1#??}
    COMPREPLY=( $(compgen -c -P '$(' $t) )
elif [[ $1 == \$\{* ]]; then # variables with a leading `${'
    t=${1#??}
    COMPREPLY=( $(compgen -v -P '${' -S '}' $t) )
elif [[ $1 == \$* ]]; then # variables with a leading `$'
    t=${1#?}
    COMPREPLY=( $(compgen -v -P '$' $t ) )
elif [[ $1 == *[*?[]* ]]; then # sh-style glob pattern
    COMPREPLY=( $( compgen -G "$1" ) )
    # ksh-style extended glob pattern - must be complete
elif shopt -q extglob && [[ $1 == *[?*+\!@]\(*\)* ]]; then
    COMPREPLY=( $( compgen -G "$1" ) )
else # last fallback is filename completion
    if ((got_bashcompl)); then
        _filedir
    else
        compopt -o nospace
        COMPREPLY=( $( compgen -f -- "$cur" ) )
    fi
fi
}

_ipset_colon_ltrim() {
((got_bashcompl)) || return 0
__ltrim_colon_completions "$1"
}

_ipset_is_set() {
local -i idx
((${#arr_sets[@]})) || arr_sets=( $(ipset list -n) )
for idx in ${!arr_sets[@]}; do
    if [[ ${arr_sets[idx]} = $1 ]]; then
        return 0
    fi
done
return 1
}

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

_ipset_set_has_timout() {
while read -r; do
    [[ $REPLY = Header:*timeout* ]] && return 0
done < <(ipset -t list "$1")
return 1
}

_ipset_get_supported_types() {
((${#arr_types[@]})) && return
local -i i=0
while read -r; do
    [[ $REPLY = "Supported set types:"* ]] && ((!i)) && i=1 && continue
    ((i)) || continue
    if [[ $REPLY = *:* ]]; then
        set -- $REPLY
        arr_types+=("$1")
    fi
done < <(ipset help)
for i in ${!arr_types[@]}; do # remove dupe entries
    for ((x=i+1; x < ${#arr_types[@]}; x++)); do
        if [[ ${arr_types[i]} = ${arr_types[x]} ]]; then
            unset arr_types[x]
        fi
    done
done
}

_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 < <(ipset list "$1" 2>/dev/null)
}

_ipset_set_has_timeout() {
while read -r; do
    [[ $REPLY = Header:*timeout* ]] && return 0
done < <(ipset -t list "$1")
return 1
}

_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 "v6\n" && return
    [[ $REPLY = Header:*"range "*.*.*.* ]] && printf "v4\n" && return
done < <(ipset -t list "$1")
}

_ipset_dedupe_cmd_opts() {
local str_opt
local -i idx
for str_opt in "${@}"; do
    for idx in ${!arr_dupe_cmd_opts[@]}; do
        [[ $str_opt = ${arr_dupe_cmd_opts[idx]} ]] && continue 2
    done
    printf "%s\n" "$str_opt"
done
}

_ipset_get_options() {
local str_list
local -i idx oidx ridx
if ((got_action)); then
    case "$str_action" in
        rename|e|swap|w|test|flush|destroy|x)
            str_list='-q -quiet'
        ;;
        save)
            str_list='-f -file -q -quiet'
        ;;
        create|n|add|del)
            str_list='-! -exist -q -quiet'
        ;;
        restore)
            str_list='-! -exist -f -file -q -quiet'
        ;;
        list)
            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
        ;;
    esac
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
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_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 && $2 ]]; then
        # second part of range will have offset = first_part_of_range+1
        str_offset="${2}"
        shift
    fi
    shift
done
# find service num to set offset
if [[ $str_offset && $str_offset != +([[:digit:]]) ]]; then
    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 = $str_offset ]] && str_offset=${str_num%/*} && break
    done < /etc/services
    [[ $str_offset = +([[:digit:]]) ]] || return 0
fi
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)
}

_ipset_complete_iface_spec() {
if [[ $cur != *,* ]]; then
    str_prefix=""
    compopt -o nospace
    if [[ $cur = *-* ]]; then # range spec
        str_prefix="${cur%-*}-" cur="${cur#*-}"
    fi
    # ip-list from file
    COMPREPLY=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$cur" ) )
    # networks
    while read; do
        [[ $REPLY = $cur* ]] && COMPREPLY+=( "$REPLY" )
    done < <(_ipset_get_networks)
    # hostnames
    if ((got_bashcompl)); then
        _known_hosts_real -F "$_IPSET_SSH_CONFIGS" -- "$cur"
    else
        if [[ ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
            COMPREPLY+=( $( compgen -A hostname "$cur" ) )
        fi
        _ipset_colon_ltrim "$cur"
    fi
    if [[ $str_prefix ]]; then # range spec
        COMPREPLY=( $( compgen -P "$str_prefix" -W '${COMPREPLY[@]}' -- "$cur" ) )
    fi
    if ((${#COMPREPLY[@]} == 1)); then
        if [[ ${COMPREPLY[*]} = @(*/*|*-*) ]]; then
           COMPREPLY=( ${COMPREPLY[*]}, )
        fi
    fi
elif [[ $cur = *,* ]]; then
    str_prefix="${cur}" cur="${cur#*,}" str_var=""
    str_prefix="${str_prefix%"$cur"}"
    if [[ $cur = physdev:* ]]; then
        cur="${cur#physdev:}"
        str_prefix="${str_prefix}physdev:"
    else
        str_var="physdev:"
    fi
    COMPREPLY=( $( compgen -P "$str_prefix" -W \
        '${str_var} $(_ipset_get_ifnames)' -- "$cur" ) )
    [[ ${COMPREPLY[0]} = *physdev: ]] && compopt -o nospace
    _ipset_colon_ltrim "$str_prefix"
fi
}

_ipset_complete_hostport_spec() {
# complete on host,proto:port[,host] spec
local str_proto str_glob2
if [[ $str_type = hash:ip,port,@(ip|net) ]]; then str_suffix=','
else str_suffix=''
fi
str_regex='^[^,]+,([^,]+)?$'
if [[ $cur != *,* ]]; then
    str_prefix=""
    compopt -o nospace
    if [[ $str_type = hash:net,port && $str_action = @(add|del) && $cur = *-* ]]
    then # range spec
        str_prefix="${cur%-*}-" cur="${cur#*-}"
    fi
    # ip-list from file
    COMPREPLY=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$cur" ) )
    if [[ $str_type = hash:net,port ]]; then
        COMPREPLY+=( $( compgen -W '$(_ipset_get_networks)' -- "$cur" ) )
        _ipset_colon_ltrim "$cur"
    fi
    if ((got_bashcompl)); then
        _known_hosts_real -F "$_IPSET_SSH_CONFIGS" -- "$cur"
    else
        if [[ ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
            COMPREPLY+=( $( compgen -A hostname "$cur" ) )
        fi
        _ipset_colon_ltrim "$cur"
    fi
    if [[ $str_prefix ]]; then # range spec
        COMPREPLY=( $( compgen -P "$str_prefix" -W '${COMPREPLY[@]}' -- "$cur" ) )
    fi
    if ((${#COMPREPLY[@]} == 1)); then
        if [[ $str_type = hash:net,port ]]; then
            if [[ ${COMPREPLY[*]} = @(*/*|*-*) ]]; then
               COMPREPLY=( ${COMPREPLY[*]}, )
            fi
        else
            COMPREPLY=( ${COMPREPLY[*]}, )
        fi
    fi
elif [[ $cur =~ $str_regex ]]; then
    (( $(IFS=,; set -- $str_type; printf "%d\n" $#) == 3 )) && 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 [[ $cur != *icmp* && \
        $cur = *,@(?(tcp:|sctp:|udp:|udplite:)@(+([[:word:]])-|\[*-*\]-)|\[*-*\]-)* ]]
    then # range spec
        str_prefix="$cur" str_glob='*[[]*' str_glob2='*-\[*' str_proto="tcp" str_var=""
        [[ $cur =~ .*(tcp|sctp|udp|udplite):.* ]] && str_proto=${BASH_REMATCH[1]}
        if [[ $cur = *\[*-*\]-* ]]; then
            str_var="${cur#*,*[}" cur="${cur#*\]-}"
            str_prefix=${str_prefix%"$cur"} str_var="${str_var%\]*}"
        elif [[ $cur = $str_glob2 ]]; then
            str_var="${cur#*,}" cur="${cur#*-}"
            str_var="${str_var#${BASH_REMATCH[1]}:}"
            str_prefix=${str_prefix%"$cur"} str_var="${str_var%%-*}"
        elif [[ $cur != $str_glob ]]; then
            str_var="${cur#*,}" cur="${cur##*-}"
            str_var="${str_var#${BASH_REMATCH[1]}:}"
            str_prefix=${str_prefix%"$cur"} str_var="${str_var%-*}"
        fi
        COMPREPLY=( $( compgen -P "$str_prefix" -S "$str_suffix" -W \
            '$(_ipset_get_services -p "$str_proto" -o "$str_var")' -- "$cur") )
        if [[ $str_prefix = *:* ]]; then
            str_prefix="${str_prefix%:*}:"
        fi
        _ipset_colon_ltrim "${str_prefix}"
    elif [[ $cur =~ $str_regex ]]; then
        # icmp[6] and services with (tcp|udp|sctp|udplite): prefix
        str_var=${BASH_REMATCH[1]}
        str_prefix="${cur}" cur="${cur#*,}"
        str_prefix="${str_prefix%"$cur"}"
        cur="${cur#${BASH_REMATCH[1]}:}"
        str_prefix="${str_prefix}${BASH_REMATCH[1]}:"
        if [[ $str_var = icmp ]]; then
            COMPREPLY=( $( compgen -P "$str_prefix" -S "$str_suffix" -W \
                '${arr_icmp_types[@]}' -- "$cur" ) )
        elif [[ $str_var = icmp6 ]]; then
            COMPREPLY=( $( compgen -P "$str_prefix" -S "$str_suffix" -W \
                '${arr_icmp6_types[@]}' -- "$cur" ) )
        elif [[ $str_var = @(tcp|udp|sctp|udplite) ]]; then
            COMPREPLY=( $( compgen -P "$str_prefix" -W \
                '$(_ipset_get_services -p $str_var)' -- "$cur" ) )
            compopt -o nospace
        fi
        _ipset_colon_ltrim "$str_prefix"
    elif [[ $cur = *,* ]]; then # first attempt :/ long list
        str_prefix="${cur%,*}," cur="${cur#*,}"
        str_var="tcp: udp: sctp: udplite: icmp: icmp6:"
        # add the services
        COMPREPLY=( $( compgen -P "$str_prefix" -W \
            '$str_var $(_ipset_get_services -p tcp)' -- "$cur" ) )
        for str_var in $( compgen -P "$str_prefix" -S ":0$str_suffix" -W \
            '$(_ipset_get_protocols)' -- "$cur" )
        do
            COMPREPLY+=( "$str_var" ) # add the protocols
        done
        _ipset_colon_ltrim "$str_prefix$cur"
        compopt -o nospace
    fi
elif [[ $cur = *,*,* && $str_type = hash:ip,port,@(ip|net) ]]; then
    str_prefix="${cur}" cur="${cur##*,}"
    str_prefix="${str_prefix%"$cur"}"
    # ip-list from file
    COMPREPLY=( $( compgen -W \
        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
        -- "$cur" ) )
    if [[ $str_type = hash:ip,port,net ]]; then
        while read; do
            [[ $REPLY = $cur* ]] && COMPREPLY+=( "$str_prefix$REPLY" )
        done < <(_ipset_get_networks)
        _ipset_colon_ltrim "$str_prefix$cur"
    fi
    if ((got_bashcompl)); then
        _known_hosts_real -p "$str_prefix" -F "$_IPSET_SSH_CONFIGS" -- "$cur"
    else
        if [[ ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
            COMPREPLY+=( $( compgen -P "$str_prefix" -A hostname "$cur" ) )
        fi
        _ipset_colon_ltrim "$str_prefix$cur"
    fi
    if ((${#COMPREPLY[@]} == 1)); then
        if [[ $str_type = hash:ip,port,net && ${COMPREPLY[*]} != */* ]]; then
            compopt -o nospace
            COMPREPLY=( ${COMPREPLY[*]}/ )
        fi
    fi
fi
}

_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}"
}

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

_ipset_complete() {
shopt -s extglob
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_counters=""
local -i i=x=y=0
local -i got_bashcompl=got_action=action_index=order_index=set_has_timeout=0
local -i ignore_errors=use_file=names_only=headers_only=save_format=res_sort=0
local arr_sets=() arr_types=() arr_members=() arr_unknown_opts=()
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=()

# ipset version check 6.x upwards (to v?) is supported
ips_version="$(ipset version)"
ips_version="${ips_version#ipset v}"
ips_version="${ips_version%,+([[:blank:]])protocol*}"
read -a ips_version <<< ${ips_version//./ }
[[ ${ips_version[0]} = +([[:digit:]]) ]] || return 1
((ips_version[0] < 6)) && return 1

# ipset -gt v6.17 has counters flag
if ((ips_version[0] == 6 && ips_version[1] >= 17)) || ((ips_version[0] > 6))
then
    str_counters="counters"
fi

# 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

if ((got_bashcompl)); then
# current bash completion got a bug i reported:
# https://alioth.debian.org/tracker/index.php?func=detail&aid=314056&group_id=100114&atid=413095
# putting corrected function here, so things don't break
__ltrim_colon_completions() {
    if [[ "$1" == *:* && "$COMP_WORDBREAKS" == *:* ]]; then
        # Remove colon-word prefix from COMPREPLY items
        local colon_word="${1%"${1##*:}"}"
        local i=${#COMPREPLY[*]}
        while [[ $((--i)) -ge 0 ]]; do
            COMPREPLY[$i]=${COMPREPLY[$i]#"$colon_word"}
        done
    fi
}
fi

#_DEBUG_NF_COMPLETION=Y
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 < ${#words[@]}-1; i++)); do
case "${words[i]}" in
    @(create|n|add|del|test|destroy|x|list|save|restore|flush|rename|e|swap|w|help|version))
        [[ ${words[i-1]} = @(-f|-file) ]] && continue # there 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
    ;;
    -\!|-exist)
        [[ ${words[i-1]} != @(-f|-file) ]] &&\
            ignore_errors=1 arr_used_opts+=(${words[i]})
    ;;
    -f|-file)
        [[ ${words[i-1]} != @(-f|-file) ]] &&\
            use_file=1 str_filename="${words[i+1]}" \
            arr_used_opts+=(${words[i]})
    ;;
    -n|-name)
        [[ ${words[i-1]} != @(-f|-file) ]] &&\
            names_only=1 arr_used_opts+=(${words[i]})
    ;;
    -t|-terse)
        [[ ${words[i-1]} != @(-f|-file) ]] &&\
            headers_only=1 arr_used_opts+=(${words[i]})
    ;;
    -o|-output)
        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
    ;;
    -r|-resolve|-s|-sorted)
        [[ ${words[i-1]} != @(-f|-file) ]] &&\
            res_sort=1 arr_used_opts+=(${words[i]})
    ;;
    -q|-quiet)
        arr_used_opts+=(${words[i]})
    ;;
#    -?*)
#        if [[ ${words[i]#-} != @(q|quiet) ]]; then
#            # don't include filenames
#            if [[ ${words[i-1]} != @(-f|-file|\>) || ${words[i+1]} != \< ]]; then
#                arr_unknown_opts[${#arr_unknown_opts[@]}]="${words[i]}"
#            fi
#        fi
#    ;;
    before|after)
        if ((got_action && ! order_index && i == action_index+3)); then
            order_index=$i str_order=""
        fi
    ;;
    timeout|range|maxelem|family|hashsize|size|netmask|nomatch|counters)
        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
    ;;
esac
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" "$headers_only"
#    printf "arr_unknown_opts: <%s>\n" "${arr_unknown_opts[@]}"
    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

#case "$cur" in # depend on current
#    \<|\>) # redirection operator
#        compopt -o nospace
#        COMPREPLY=( $( compgen -f ) ) # no $cur, so completion starts without space after redirection
#        return 0
#    ;;
#esac
case "$prev" in # depend on previous option
    -o|-output)
        # 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
    ;;
    -f|-file|\<|\>)
        if ((got_bashcompl)); then
            _filedir
        else
            compopt -o nospace
            COMPREPLY=( $( compgen -f -- "$cur" ) )
        fi
        return 0
    ;;
esac

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 = $prev ]]; then
    # depend on previous option which should be the action
    case "$str_action" in
#            create|n|version) :
#            ;;
        help)
            _ipset_get_supported_types
            COMPREPLY=( $( compgen -W '${arr_types[@]}' -- "$cur" ) )
            _ipset_colon_ltrim "$cur"
        ;;
        add|del|rename|e|swap|w|test)
            COMPREPLY=( $( compgen -W '$(ipset list -n)' -- "$cur" ) )
            _ipset_colon_ltrim "$cur"
        ;;
        list|flush|save|destroy|x)
            # 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[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                fi
            else
                COMPREPLY=( $( compgen -W '$(ipset list -n)' -- "$cur" ) )
                _ipset_colon_ltrim "$cur"
            fi
        ;;
        restore)
            if [[ $cur = -* ]]; then
                _ipset_get_options
            elif ! [[ $str_filename ]]; then
                # don't show redirector if we have option -f
                COMPREPLY=( \< )
            fi
        ;;
    esac
elif ((cword == action_index+2)) && [[ $str_setname = $prev ]]; then
    case "$str_action" in
#            rename|e) :
#            ;;
        save|restore|list|flush|destroy|x)
            if [[ $cur = -* ]]; then
                _ipset_get_options
            fi
        ;;
        @(create|n))
            _ipset_get_supported_types
            COMPREPLY=( $( compgen -W '${arr_types[@]}' -- "$cur" ) )
            _ipset_colon_ltrim "$cur"
        ;;
        @(swap|w)) # list two sets
            COMPREPLY=( $( compgen -W '$(ipset list -n)' -- "$cur" ) )
            for i in ${!COMPREPLY[@]}; do # remove the dupe setname from the list
                [[ ${COMPREPLY[i]} = $str_setname ]] && unset COMPREPLY[i] && break
            done
            _ipset_colon_ltrim "$cur"
        ;;
        add)
            str_type=$(_ipset_get_set_type "$str_setname")
            case "$str_type" in
                hash:ip|bitmap:ip|hash:net)
                    # ip-list from file
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
                        -- "$cur" ) )
                    if ((got_bashcompl)); then
                        _known_hosts_real -F "$_IPSET_SSH_CONFIGS" -- "$cur"
                    else
                        if [[ ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
                            COMPREPLY=( $( compgen -A hostname "$cur" ) )
                        fi
                        _ipset_colon_ltrim "$cur"
                    fi
                    if [[ $str_type = bitmap:ip,mac ]]; then
                        compopt -o nospace
                        ((${#COMPREPLY[@]} == 1)) && COMPREPLY=( ${COMPREPLY[*]}, )
                    elif [[ $str_type = hash:net ]]; then
                        COMPREPLY+=( $( compgen -W '$(_ipset_get_networks)' -- "$cur" ) )
                        if ((${#COMPREPLY[@]} == 1)); then
                            if [[ ${COMPREPLY[*]} != */* ]]; then
                                compopt -o nospace
                                COMPREPLY=( ${COMPREPLY[*]}/ )
                            fi
                        fi
                        _ipset_colon_ltrim "$cur"
                    fi
                ;;
                bitmap:ip,mac)
                    if [[ $cur = *,* ]]; then
                        str_prefix="$cur" cur="${cur#*,}"
                        str_prefix="${str_prefix%$cur}"
                        str_regex='^([[:xdigit:]]{2})(:[[:xdigit:]]{2}){5}$'
                        x=0 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 $_IPSET_MACLIST_FILE ]]
                            then
                                # if a file with mac addresses is in env var, load em
                                str_tmp=$(while read -r mac rest; do
                                    [[ $mac = *([[:blank:]])\#* ]] && continue
                                    mac="${mac//\#*/}"
                                    [[ $mac =~ $str_regex ]] && printf "%s\n" "$mac"
                                    done < "${_IPSET_MACLIST_FILE}")
                                COMPREPLY=( $( compgen -P "$str_prefix" \
                                    -W "$str_tmp" -- "$cur" ) )
                                _ipset_colon_ltrim "$str_prefix$cur"
                            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
                            COMPREPLY+=( $( compgen -P "$str_prefix" -W "$str_tmp" \
                                -- "$cur" ) )
                            _ipset_colon_ltrim "$str_prefix$cur"
                        fi
                    else
                        # ip-list from file
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_get_iplist "$(_ipset_get_set_family "$str_setname")")' \
                            -- "$cur" ) )
                        if ((got_bashcompl)); then
                            _known_hosts_real -F "$_IPSET_SSH_CONFIGS" -- "$cur"
                        else
                            if [[ ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
                                COMPREPLY=( $( compgen -A hostname "$cur" ) )
                            fi
                            _ipset_colon_ltrim "$cur"
                        fi
                        compopt -o nospace
                        ((${#COMPREPLY[@]} == 1)) && COMPREPLY=( ${COMPREPLY[*]}, )
                    fi
                ;;
                bitmap:port)
                    # complete port [range]
                    str_tmp="$cur" str_var=""
                    str_glob='[^\[]*-*'
                    if [[ $cur = \[*-*\]-* ]]; then str_var="${cur#\[}"
                        str_var="${str_var%%\]*}"
                        cur="${cur#*\]-}"
                        str_tmp=${str_tmp%"$cur"}
                    elif [[ $cur = $str_glob ]]; then str_var="${cur%%-*}"
                        cur="${cur#*-}"
                        str_tmp=${str_tmp%"$cur"}
                    else str_tmp=""
                        compopt -o nospace
                    fi
                    COMPREPLY=( $( compgen -P "$str_tmp" \
                        -W '$(_ipset_get_services -o $str_var)' -- "$cur" ) )
                ;;
                # show sets if the set to add is of type list:set
                list:*) arr_tmp=() arr_sets=( $(ipset list -n) )
                    _ipset_get_members --names-only "$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[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                ;;
                hash:@(ip,port|ip,port,ip|ip,port,net|net,port))
                    _ipset_complete_hostport_spec
                ;;
                hash:net,iface)
                    _ipset_complete_iface_spec
                ;;
            esac
        ;;
        del|test)
            str_type=$(_ipset_get_set_type "$str_setname")
            if [[ $str_action = del && $str_type = bitmap:@(ip|port) ]]; then
                # complete members
                str_prefix=""
                _ipset_get_members --names-only "$str_setname"
                if [[ $cur = *-* ]]; then
                    if [[ $str_type = bitmap:port ]]; then
                        for i in ${!arr_members[@]}; do
                            ((${arr_members[i]} <= ${cur%%-*})) && \
                                unset arr_members[i] || break
                        done
                    fi
                    str_prefix="${cur%-*}-" cur="${cur#*-}"
                else
                    compopt -o nospace
                fi
                COMPREPLY=( $( compgen -P "$str_prefix" -W '${arr_members[@]}' -- "$cur" ) )
            elif [[ $str_action = del && $str_type = hash:@(ip,port|ip,port,ip|ip,port,net|net,port) ]]
            then
                if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                    _ipset_get_members --names-only "$str_setname"
                    COMPREPLY=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                    _ipset_complete_hostport_spec
                else
                    _ipset_get_members --names-only "$str_setname"
                    _ipset_complete_hostport_spec
                    COMPREPLY+=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                fi
            elif [[ $str_action = test && $str_type = hash:@(ip,port|ip,port,ip|ip,port,net|net,port) ]]
            then
                if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                    _ipset_get_members --names-only "$str_setname"
                    COMPREPLY=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                    _ipset_complete_hostport_spec
                else
                    _ipset_get_members --names-only "$str_setname"
                    _ipset_complete_hostport_spec
                    COMPREPLY+=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                fi
            elif [[ $str_action = del && $str_type = hash:net,iface ]]; then
                if [[ ${_IPSET_COMPL_DEL_MODE:=both} = members ]]; then
                    _ipset_get_members --names-only "$str_setname"
                    COMPREPLY=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                elif [[ ${_IPSET_COMPL_DEL_MODE} = spec ]]; then
                    _ipset_complete_iface_spec
                else
                    _ipset_get_members --names-only "$str_setname"
                    _ipset_complete_iface_spec
                    COMPREPLY+=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                fi
            elif [[ $str_action = test && $str_type = hash:net,iface ]]; then
                if [[ ${_IPSET_COMPL_TEST_MODE:=both} = members ]]; then
                    _ipset_get_members --names-only "$str_setname"
                    COMPREPLY=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                elif [[ ${_IPSET_COMPL_TEST_MODE} = spec ]]; then
                    _ipset_complete_iface_spec
                else
                    _ipset_get_members --names-only "$str_setname"
                    _ipset_complete_iface_spec
                    COMPREPLY+=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                    _ipset_colon_ltrim "$cur"
                fi
            else
                _ipset_get_members --names-only "$str_setname"
                COMPREPLY=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                _ipset_colon_ltrim "$cur"
            fi
        ;;
    esac
elif ((cword == action_index+3)) && [[ $cur != -* ]]; then
    case "$str_action" in
        add)
            str_type=$(_ipset_get_set_type "$str_setname")
            if _ipset_set_has_timout "$str_setname"; then
                str_timeout=timeout
            else
                str_timeout=""
            fi
            case "$str_type" in
                hash:*net*)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts $str_timeout $str_counters nomatch)' \
                        -- "$cur" ) )
                ;;
                hash:*!(net)*|bitmap:*)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts $str_timeout $str_counters)' \
                        -- "$cur" ) )
                ;;
                list:*)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts $str_order $str_timeout $str_counters)' \
                        -- "$cur" ) )
                ;;
            esac
        ;;
        create|n)
            case "$prev" in
                hash:*)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts family hashsize timeout maxelem $str_counters)' \
                        -- "$cur" ) )
                ;;
                bitmap:ip)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts range netmask timeout $str_counters)' \
                    -- "$cur" ) )
                ;;
                bitmap:!(ip)?*)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts range timeout $str_counters)' \
                        -- "$cur" ) )
                ;;
                list:*)
                    COMPREPLY=( $( compgen -W \
                        '$(_ipset_dedupe_cmd_opts size timeout $str_counters)' \
                        -- "$cur" ) )
                ;;
            esac
        ;;
        del|test)
            str_type=$(_ipset_get_set_type "$str_setname")
            if [[ $str_type = list:* ]]; then
                COMPREPLY=( $( compgen -W '$str_order' -- "$cur" ) )
            fi
        ;;
    esac
elif ((cword == action_index+3)) && [[ $cur = -* ]]; then
    _ipset_get_options
elif ((cword >= action_index+4)); then # add options following
    if [[ $cur = -* && \
        $prev != @(timeout|hashsize|size|family|maxelem|range|netmask|before|after|counters) ]]
    then _ipset_get_options
        return 0
    fi
    case "$str_action" in
        add)
            str_type=$(_ipset_get_set_type "$str_setname")
            if _ipset_set_has_timout "$str_setname"; then
                str_timeout=timeout
            else
                str_timeout=""
            fi
            # validate option argument values
            for ((x=$action_index+3; x < ${#words[@]}; x++)); do
                [[ ${words[x]} = timeout && \
                    ${words[x+1]} != @(+([[:digit:]])|0x+([[:xdigit:]])) ]] && return 0
            done
            case "$str_type" in
                hash:*net*)
                    if [[ $prev != timeout ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts $str_timeout $str_counters nomatch)' \
                            -- "$cur" ) )
                    fi
                ;;
                list:*)
                    if [[ $prev = @(before|after) ]] && ((cword-1 == order_index)); then
                        _ipset_get_members --names-only "$str_setname"
                        COMPREPLY=( $( compgen -W '${arr_members[@]}' -- "$cur" ) )
                        _ipset_colon_ltrim "$cur"
                    elif [[ $prev != timeout ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts $str_order $str_timeout $str_counters)' \
                            -- "$cur" ) )
                    fi
                ;;
            esac
        ;;
        create|n)
            for ((x=$action_index+3; x < ${#words[@]}; x++)); do
                if [[ ${words[x+1]} && ${words[x+1]} != $cur ]]; then
                    case "${words[x]}" in # validate option argument values
                        @(hashsize|timeout|size|maxelem))
                            [[ ${words[x+1]} != @(+([[:digit:]])|0x+([[:xdigit:]])) ]] && return 0
                        ;;
                        family)
                            [[ ${words[x+1]} != inet?(6) ]] && return 0
                        ;;
                        range)
                            case "$str_type" in
                                bitmap:port)
                                    [[ ${words[x+1]} != *-* ]] && return 0
                                ;;
                                *)
                                    [[ ${words[x+1]} != @(*-*|*/+([[:digit:]])) ]] && return 0
                                ;;
                            esac
                        ;;
                    esac
                fi
            done
            case "${words[action_index+2]}" in # must be the set type
                hash:*)
                    if [[ $prev = family ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts inet inet6)' \
                            -- "$cur" ) )
                    elif [[ $prev != @(family|hashsize|timeout|maxelem) ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts family hashsize timeout maxelem $str_counters)' \
                            -- "$cur" ) )
                    fi
                ;;
                bitmap:ip)
                    if [[ $prev != @(range|netmask|timeout) ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts range netmask timeout $str_counters)' \
                            -- "$cur" ) )
                    fi
                ;;
                bitmap:!(ip)?*)
                    if [[ $prev != @(range|timeout) ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts range timeout $str_counters)' \
                            -- "$cur" ) )
                    fi
                ;;
                list:*)
                    if [[ $prev != @(size|timeout) ]]; then
                        COMPREPLY=( $( compgen -W \
                            '$(_ipset_dedupe_cmd_opts size timeout $str_counters)' \
                            -- "$cur" ) )
                    fi
                ;;
            esac
            if [[ ${words[action_index+2]} = bitmap:port && $prev = range ]]; then
                # complete port ranges
                str_prefix="$cur" str_suffix="" str_var="" str_glob='[^\[]*-*'
                if [[ $cur = \[*-*\]-* ]]; then
                    str_var="${cur#\[}"
                    str_var="${str_var%%\]*}"
                    cur="${cur#*\]-}"
                    str_prefix=${str_prefix%"$cur"}
                elif [[ $cur = $str_glob ]]; then
                    str_var="${cur%%-*}"
                    cur="${cur#*-}"
                    str_prefix=${str_prefix%"$cur"}
                else
                    str_prefix="" str_suffix=-
                    compopt -o nospace
                fi
                COMPREPLY=( $( compgen -P "$str_prefix" -S "$str_suffix" \
                    -W '$(_ipset_get_services -o $str_var)' -- "$cur" ) )
            fi
        ;;
        del|test)
            str_type=$(_ipset_get_set_type "$str_setname")
            case "$str_type" in
                list:*) arr_tmp=()
                    _ipset_get_members --names-only "$str_setname"
                    if [[ $prev = @(before|after) ]] && ((cword-1 == order_index))
                    then
                        case "$prev" in
                            before)
                                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
                                ;;
                            after)
                                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
                                ;;
                        esac
                        COMPREPLY=( $( compgen -W '${arr_tmp[@]}' -- "$cur" ) )
                        _ipset_colon_ltrim "$cur"
                    fi
                ;;
            esac
        ;;
    esac
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 || 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 ! ((${#COMPREPLY[@]})); then # last exit brooklyn
    [[ $cur ]] && _ipset_bash_default_compl "$cur"
fi
if [[ $_DEBUG_NF_COMPLETION ]]; then
    printf "COMPREPLY:\n"
    printf "<%s>\n" "${COMPREPLY[@]}"
fi
}
complete -F _ipset_complete ipset