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# tc(8) completion                                         -*- shell-script -*-
# Copyright 2016 6WIND S.A.
# Copyright 2016 Quentin Monnet <quentin.monnet@6wind.com>

QDISC_KIND=' choke codel bfifo pfifo pfifo_head_drop fq fq_codel gred hhf \
            mqprio multiq netem pfifo_fast pie red rr sfb sfq tbf atm cbq drr \
            dsmark hfsc htb prio qfq '
FILTER_KIND=' basic bpf cgroup flow flower fw route rsvp tcindex u32 matchall '
ACTION_KIND=' gact mirred bpf sample '

# Takes a list of words in argument; each one of them is added to COMPREPLY if
# it is not already present on the command line. Returns no value.
_tc_once_attr()
{
    local w subcword found
    for w in $*; do
        found=0
        for (( subcword=3; subcword < ${#words[@]}-1; subcword++ )); do
            if [[ $w == ${words[subcword]} ]]; then
                found=1
                break
            fi
        done
        [[ $found -eq 0 ]] && \
            COMPREPLY+=( $( compgen -W "$w" -- "$cur" ) )
    done
}

# Takes a list of words in argument; each one of them is added to COMPREPLY if
# it is not already present on the command line from the provided index. Returns
# no value.
_tc_once_attr_from()
{
    local w subcword found from=$1
    shift
    for w in $*; do
        found=0
        for (( subcword=$from; subcword < ${#words[@]}-1; subcword++ )); do
            if [[ $w == ${words[subcword]} ]]; then
                found=1
                break
            fi
        done
        [[ $found -eq 0 ]] && \
            COMPREPLY+=( $( compgen -W "$w" -- "$cur" ) )
    done
}

# Takes a list of words in argument; adds them all to COMPREPLY if none of them
# is already present on the command line. Returns no value.
_tc_one_of_list()
{
    local w subcword
    for w in $*; do
        for (( subcword=3; subcword < ${#words[@]}-1; subcword++ )); do
            [[ $w == ${words[subcword]} ]] && return 1
        done
    done
    COMPREPLY+=( $( compgen -W "$*" -- "$cur" ) )
}

# Takes a list of words in argument; adds them all to COMPREPLY if none of them
# is already present on the command line from the provided index. Returns no
# value.
_tc_one_of_list_from()
{
    local w subcword from=$1
    shift
    for w in $*; do
        for (( subcword=$from; subcword < ${#words[@]}-1; subcword++ )); do
            [[ $w == ${words[subcword]} ]] && return 1
        done
    done
    COMPREPLY+=( $( compgen -W "$*" -- "$cur" ) )
}

# Returns "$cur ${cur}arg1 ${cur}arg2 ..."
_tc_expand_units()
{
    [[ $cur =~ ^[0-9]+ ]] || return 1
    local value=${cur%%[^0-9]*}
    [[ $cur == $value ]] && echo $cur
    echo ${@/#/$value}
}

# Complete based on given word, usually $prev (or possibly the word before),
# for when an argument or an option name has but a few possible arguments (so
# tc does not take particular commands into account here).
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_direct_complete()
{
    case $1 in
        # Command options
        dev)
            _available_interfaces
            return 0
            ;;
        classid)
            return 0
            ;;
        estimator)
            local list=$( _tc_expand_units 'secs' 'msecs' 'usecs' )
            COMPREPLY+=( $( compgen -W "$list" -- "$cur" ) )
            return 0
            ;;
        handle)
            return 0
            ;;
        parent|flowid)
            local i iface ids cmd
            for (( i=3; i < ${#words[@]}-2; i++ )); do
                [[ ${words[i]} == dev ]] && iface=${words[i+1]}
                break
            done
            for cmd in qdisc class; do
                if [[ -n $iface ]]; then
                    ids+=$( tc $cmd show dev $iface 2>/dev/null | \
                        cut -d\  -f 3 )" "
                else
                    ids+=$( tc $cmd show 2>/dev/null | cut -d\  -f 3 )
                fi
            done
            [[ $ids != " " ]] && \
                COMPREPLY+=( $( compgen -W "$ids" -- "$cur" ) )
            return 0
            ;;
        protocol) # list comes from lib/ll_proto.c
            COMPREPLY+=( $( compgen -W ' 802.1Q 802.1ad 802_2 802_3 LLDP aarp \
                all aoe arp atalk atmfate atmmpoa ax25 bpq can control cust \
                ddcmp dec diag dna_dl dna_rc dna_rt econet ieeepup ieeepupat \
                ip ipv4 ipv6 ipx irda lat localtalk loop mobitex ppp_disc \
                ppp_mp ppp_ses ppptalk pup pupat rarp sca snap tipc tr_802_2 \
                wan_ppp x25' -- "$cur" ) )
            return 0
            ;;
        prio)
            return 0
            ;;
        stab)
            COMPREPLY+=( $( compgen -W 'mtu tsize mpu overhead
                linklayer' -- "$cur" ) )
            ;;

        # Qdiscs and classes options
        alpha|bands|beta|buckets|corrupt|debug|decrement|default|\
        default_index|depth|direct_qlen|divisor|duplicate|ewma|flow_limit|\
        flows|hh_limit|increment|indices|linklayer|non_hh_weight|num_tc|\
        penalty_burst|penalty_rate|prio|priomap|probability|queues|r2q|\
        reorder|vq|vqs)
            return 0
            ;;
        setup)
            COMPREPLY+=( $( compgen -W 'vqs' -- "$cur" ) )
            return 0
            ;;
        hw)
            COMPREPLY+=( $( compgen -W '1 0' -- "$cur" ) )
            return 0
            ;;
        distribution)
            COMPREPLY+=( $( compgen -W 'uniform normal pareto
                paretonormal' -- "$cur" ) )
            return 0
            ;;
        loss)
            COMPREPLY+=( $( compgen -W 'random state gmodel' -- "$cur" ) )
            return 0
            ;;

        # Qdiscs and classes options options
        gap|gmodel|state)
            return 0
            ;;

        # Filters options
        map)
            COMPREPLY+=( $( compgen -W 'key' -- "$cur" ) )
            return 0
            ;;
        hash)
            COMPREPLY+=( $( compgen -W 'keys' -- "$cur" ) )
            return 0
            ;;
        indev)
            _available_interfaces
            return 0
            ;;
        eth_type)
            COMPREPLY+=( $( compgen -W 'ipv4 ipv6' -- "$cur" ) )
            return 0
            ;;
        ip_proto)
            COMPREPLY+=( $( compgen -W 'tcp udp' -- "$cur" ) )
            return 0
            ;;

        # Filters options options
        key|keys)
            [[ ${words[@]} =~ graft ]] && return 1
            COMPREPLY+=( $( compgen -W 'src dst proto proto-src proto-dst iif \
                priority mark nfct nfct-src nfct-dst nfct-proto-src \
                nfct-proto-dst rt-classid sk-uid sk-gid vlan-tag rxhash' -- \
                "$cur" ) )
            return 0
            ;;

        # BPF options - used for filters, actions, and exec
        export|bytecode|bytecode-file|object-file)
            _filedir
            return 0
            ;;
        object-pinned|graft) # Pinned object is probably under /sys/fs/bpf/
            [[ -n "$cur" ]] && _filedir && return 0
            COMPREPLY=( $( compgen -G "/sys/fs/bpf/*" -- "$cur" ) ) || _filedir
            compopt -o nospace
            return 0
            ;;
        section)
            if (type objdump > /dev/null 2>&1) ; then
                local fword objfile section_list
                for (( fword=3; fword < ${#words[@]}-3; fword++ )); do
                    if [[ ${words[fword]} == object-file ]]; then
                        objfile=${words[fword+1]}
                        break
                    fi
                done
                section_list=$( objdump -h $objfile 2>/dev/null | \
                    sed -n 's/^ *[0-9]\+ \([^ ]*\) *.*/\1/p' )
                COMPREPLY+=( $( compgen -W "$section_list" -- "$cur" ) )
            fi
            return 0
            ;;
        import|run)
            _filedir
            return 0
            ;;
        type)
            COMPREPLY+=( $( compgen -W 'cls act' -- "$cur" ) )
            return 0
            ;;

        # Actions options
        random)
            _tc_one_of_list 'netrand determ'
            return 0
            ;;

        # Units for option arguments
        bandwidth|maxrate|peakrate|rate)
            local list=$( _tc_expand_units 'bit' \
                'kbit' 'kibit' 'kbps' 'kibps' \
                'mbit' 'mibit' 'mbps' 'mibps' \
                'gbit' 'gibit' 'gbps' 'gibps' \
                'tbit' 'tibit' 'tbps' 'tibps' )
            COMPREPLY+=( $( compgen -W "$list" -- "$cur" ) )
            ;;
        admit_bytes|avpkt|burst|cell|initial_quantum|limit|max|min|mtu|mpu|\
        overhead|quantum|redflowlist)
            local list=$( _tc_expand_units \
                'b' 'kbit' 'k' 'mbit' 'm' 'gbit' 'g' )
            COMPREPLY+=( $( compgen -W "$list" -- "$cur" ) )
            ;;
        db|delay|evict_timeout|interval|latency|perturb|rehash|reset_timeout|\
        target|tupdate)
            local list=$( _tc_expand_units 'secs' 'msecs' 'usecs' )
            COMPREPLY+=( $( compgen -W "$list" -- "$cur" ) )
            ;;
    esac
    return 1
}

# Complete with options names for qdiscs. Each qdisc has its own set of options
# and it seems we cannot really parse it from anywhere, so we add it manually
# in this function.
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_qdisc_options()
{
    case $1 in
        choke)
            _tc_once_attr 'limit bandwidth ecn min max burst'
            return 0
            ;;
        codel)
            _tc_once_attr 'limit target interval'
            _tc_one_of_list 'ecn noecn'
            return 0
            ;;
        bfifo|pfifo|pfifo_head_drop)
            _tc_once_attr 'limit'
            return 0
            ;;
        fq)
            _tc_once_attr 'limit flow_limit quantum initial_quantum maxrate \
                buckets'
            _tc_one_of_list 'pacing nopacing'
            return 0
            ;;
        fq_codel)
            _tc_once_attr 'limit flows target interval quantum'
            _tc_one_of_list 'ecn noecn'
            return 0
            ;;
        gred)
            _tc_once_attr 'setup vqs default grio vq prio limit min max avpkt \
                burst probability bandwidth'
            return 0
            ;;
        hhf)
            _tc_once_attr 'limit quantum hh_limit reset_timeout admit_bytes \
                evict_timeout non_hh_weight'
            return 0
            ;;
        mqprio)
            _tc_once_attr 'num_tc map queues hw'
            return 0
            ;;
        netem)
            _tc_once_attr 'delay distribution corrupt duplicate loss ecn \
                reorder rate'
            return 0
            ;;
        pie)
            _tc_once_attr 'limit target tupdate alpha beta'
            _tc_one_of_list 'bytemode nobytemode'
            _tc_one_of_list 'ecn noecn'
            return 0
            ;;
        red)
            _tc_once_attr 'limit min max avpkt burst adaptive probability \
                bandwidth ecn harddrop'
            return 0
            ;;
        rr|prio)
            _tc_once_attr 'bands priomap multiqueue'
            return 0
            ;;
        sfb)
            _tc_once_attr 'rehash db limit max target increment decrement \
                penalty_rate penalty_burst'
            return 0
            ;;
        sfq)
            _tc_once_attr 'limit perturb quantum divisor flows depth headdrop \
                redflowlimit min max avpkt burst probability ecn harddrop'
            return 0
            ;;
        tbf)
            _tc_once_attr 'limit burst rate mtu peakrate latency overhead \
                linklayer'
            return 0
            ;;
        cbq)
            _tc_once_attr 'bandwidth avpkt mpu cell ewma'
            return 0
            ;;
        dsmark)
            _tc_once_attr 'indices default_index set_tc_index'
            return 0
            ;;
        hfsc)
            _tc_once_attr 'default'
            return 0
            ;;
        htb)
            _tc_once_attr 'default r2q direct_qlen debug'
            return 0
            ;;
        multiq|pfifo_fast|atm|drr|qfq)
            return 0
            ;;
    esac
    return 1
}

# Complete with options names for BPF filters or actions.
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_bpf_options()
{
    [[ ${words[${#words[@]}-3]} == object-file ]] && \
        _tc_once_attr 'section export'
    [[ ${words[${#words[@]}-5]} == object-file ]] && \
        [[ ${words[${#words[@]}-3]} =~ (section|export) ]] && \
        _tc_once_attr 'section export'
    _tc_one_of_list 'bytecode bytecode-file object-file object-pinned'
    _tc_once_attr 'verbose index direct-action action classid'
    return 0
}

# Complete with options names for filter actions.
# This function is recursive, thus allowing multiple actions statement to be
# parsed.
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_filter_action_options()
{
    for ((acwd=$1; acwd < ${#words[@]}-1; acwd++));
    do
        if [[ action == ${words[acwd]} ]]; then
            _tc_filter_action_options $((acwd+1)) && return 0
        fi
    done

    local action acwd
    for ((acwd=$1; acwd < ${#words[@]}-1; acwd++)); do
        if [[ $ACTION_KIND =~ ' '${words[acwd]}' ' ]]; then
            _tc_one_of_list_from $acwd action
            _tc_action_options $acwd && return 0
        fi
    done
    _tc_one_of_list_from $acwd $ACTION_KIND
    return 0
}

# Complete with options names for filters.
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_filter_options()
{

    for ((acwd=$1; acwd < ${#words[@]}-1; acwd++));
    do
        if [[ action == ${words[acwd]} ]]; then
            _tc_filter_action_options $((acwd+1)) && return 0
        fi
    done

    filter=${words[$1]}
    case $filter in
        basic)
            _tc_once_attr 'match action classid'
            return 0
            ;;
        bpf)
            _tc_bpf_options
            return 0
            ;;
        cgroup)
            _tc_once_attr 'match action'
            return 0
            ;;
        flow)
            local i
            for (( i=5; i < ${#words[@]}-1; i++ )); do
                if [[ ${words[i]} =~ ^keys?$ ]]; then
                    _tc_direct_complete 'key'
                    COMPREPLY+=( $( compgen -W 'or and xor rshift addend' -- \
                        "$cur" ) )
                    break
                fi
            done
            _tc_once_attr 'map hash divisor baseclass match action'
            return 0
            ;;
        matchall)
            _tc_once_attr 'action skip_sw skip_hw'
            return 0
            ;;
        flower)
            _tc_once_attr 'action classid indev dst_mac src_mac eth_type \
                ip_proto dst_ip src_ip dst_port src_port'
            return 0
            ;;
        fw)
            _tc_once_attr 'action classid'
            return 0
            ;;
        route)
            _tc_one_of_list 'from fromif'
            _tc_once_attr 'to classid action'
            return 0
            ;;
        rsvp)
            _tc_once_attr 'ipproto session sender classid action tunnelid \
                tunnel flowlabel spi/ah spi/esp u8 u16 u32'
            [[ ${words[${#words[@]}-3]} == tunnel ]] && \
                    COMPREPLY+=( $( compgen -W 'skip' -- "$cur" ) )
            [[ ${words[${#words[@]}-3]} =~ u(8|16|32) ]] && \
                    COMPREPLY+=( $( compgen -W 'mask' -- "$cur" ) )
            [[ ${words[${#words[@]}-3]} == mask ]] && \
                    COMPREPLY+=( $( compgen -W 'at' -- "$cur" ) )
            return 0
            ;;
        tcindex)
            _tc_once_attr 'hash mask shift classid action'
            _tc_one_of_list 'pass_on fall_through'
            return 0
            ;;
        u32)
            _tc_once_attr 'match link classid action offset ht hashkey sample'
            COMPREPLY+=( $( compgen -W 'ip ip6 udp tcp icmp u8 u16 u32 mark \
                divisor' -- "$cur" ) )
            return 0
            ;;
    esac
    return 1
}

# Complete with options names for actions.
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_action_options()
{
    local from=$1
    local action=${words[from]}
    case $action in
        bpf)
            _tc_bpf_options
            return 0
            ;;
        mirred)
            _tc_one_of_list_from $from 'ingress egress'
            _tc_one_of_list_from $from 'mirror redirect'
            _tc_once_attr_from $from 'index dev'
            return 0
            ;;
        sample)
            _tc_once_attr_from $from 'rate'
            _tc_once_attr_from $from 'trunc'
            _tc_once_attr_from $from 'group'
            return 0
            ;;
        gact)
            _tc_one_of_list_from $from 'reclassify drop continue pass'
            _tc_once_attr_from $from 'random'
            return 0
            ;;
    esac
    return 1
}

# Complete with options names for exec.
# Returns 0 is completion should stop after running this function, 1 otherwise.
_tc_exec_options()
{
    case $1 in
        import)
            [[ ${words[${#words[@]}-3]} == import ]] && \
                _tc_once_attr 'run'
            return 0
            ;;
        graft)
            COMPREPLY+=( $( compgen -W 'key type' -- "$cur" ) )
            [[ ${words[${#words[@]}-3]} == object-file ]] && \
                _tc_once_attr 'type'
            _tc_bpf_options
            return 0
            ;;
    esac
    return 1
}

# Main completion function
# Logic is as follows:
#   1. Check if previous word is a global option; if so, propose arguments.
#   2. Check if current word is a global option; if so, propose completion.
#   3. Check for the presence of a main command (qdisc|class|filter|...). If
#      there is one, first call _tc_direct_complete to see if previous word is
#      waiting for a particular completion. If so, propose completion and exit.
#   4. Extract main command and -- if available -- its subcommand
#      (add|delete|show|...).
#   5. Propose completion based on main and sub- command in use. Additional
#      functions may be called for qdiscs, classes or filter options.
_tc()
{
    local cur prev words cword
    _init_completion || return

    case $prev in
        -V|-Version)
            return 0
            ;;
        -b|-batch|-cf|-conf)
            _filedir
            return 0
            ;;
        -force)
            COMPREPLY=( $( compgen -W '-batch' -- "$cur" ) )
            return 0
            ;;
        -nm|name)
            [[ -r /etc/iproute2/tc_cls ]] || \
                COMPREPLY=( $( compgen -W '-conf' -- "$cur" ) )
            return 0
            ;;
        -n|-net|-netns)
            local nslist=$( ip netns list 2>/dev/null )
            COMPREPLY+=( $( compgen -W "$nslist" -- "$cur" ) )
            return 0
            ;;
        -tshort)
            _tc_once_attr '-statistics'
            COMPREPLY+=( $( compgen -W 'monitor' -- "$cur" ) )
            return 0
            ;;
        -timestamp)
            _tc_once_attr '-statistics -tshort'
            COMPREPLY+=( $( compgen -W 'monitor' -- "$cur" ) )
            return 0
            ;;
    esac

    # Search for main commands
    local subcword cmd subcmd
    for (( subcword=1; subcword < ${#words[@]}-1; subcword++ )); do
        [[ ${words[subcword]} == -b?(atch) ]] && return 0
        [[ -n $cmd ]] && subcmd=${words[subcword]} && break
        [[ ${words[subcword]} != -* && \
            ${words[subcword-1]} != -@(n?(et?(ns))|c?(on)f) ]] && \
            cmd=${words[subcword]}
    done

    if [[ -z $cmd ]]; then
        case $cur in
            -*)
                local c='-Version -statistics -details -raw -pretty \
                    -iec -graphe -batch -name -netns -timestamp'
                [[ $cword -eq 1 ]] && c+=' -force'
                COMPREPLY=( $( compgen -W "$c" -- "$cur" ) )
                return 0
                ;;
            *)
                COMPREPLY=( $( compgen -W "help $( tc help 2>&1 | \
                    command sed \
                    -e '/OBJECT := /!d' \
                    -e 's/.*{//' \
                    -e 's/}.*//' \
                    -e \ 's/|//g' )" -- "$cur" ) )
                return 0
                ;;
        esac
    fi

    [[ $subcmd == help ]] && return 0

    # For this set of commands we may create COMPREPLY just by analysing the
    # previous word, if it expects for a specific list of options or values.
    if [[ $cmd =~ (qdisc|class|filter|action|exec) ]]; then
        _tc_direct_complete $prev && return 0
        if [[ ${words[${#words[@]}-3]} == estimator ]]; then
            local list=$( _tc_expand_units 'secs' 'msecs' 'usecs' )
            COMPREPLY+=( $( compgen -W "$list" -- "$cur" ) ) && return 0
        fi
    fi

    # Completion depends on main command and subcommand in use.
    case $cmd in
        qdisc)
            case $subcmd in
                add|change|replace|link|del|delete)
                    if [[ $(($cword-$subcword)) -eq 1 ]]; then
                        COMPREPLY=( $( compgen -W 'dev' -- "$cur" ) )
                        return 0
                    fi
                    local qdisc qdwd
                    for ((qdwd=$subcword; qdwd < ${#words[@]}-1; qdwd++)); do
                        if [[ $QDISC_KIND =~ ' '${words[qdwd]}' ' ]]; then
                            qdisc=${words[qdwd]}
                            _tc_qdisc_options $qdisc && return 0
                        fi
                    done
                    _tc_one_of_list $QDISC_KIND
                    _tc_one_of_list 'root ingress parent clsact'
                    _tc_once_attr 'handle estimator stab'
                    ;;
                show)
                    _tc_once_attr 'dev'
                    _tc_one_of_list 'ingress clsact'
                    _tc_once_attr '-statistics -details -raw -pretty -iec \
                        -graph -name'
                    ;;
                help)
                    return 0
                    ;;
                *)
                    [[ $cword -eq $subcword ]] && \
                        COMPREPLY=( $( compgen -W 'help add delete change \
                            replace link show' -- "$cur" ) )
                    ;;
            esac
            ;;

        class)
            case $subcmd in
                add|change|replace|del|delete)
                    if [[ $(($cword-$subcword)) -eq 1 ]]; then
                        COMPREPLY=( $( compgen -W 'dev' -- "$cur" ) )
                        return 0
                    fi
                    local qdisc qdwd
                    for ((qdwd=$subcword; qdwd < ${#words[@]}-1; qdwd++)); do
                        if [[ $QDISC_KIND =~ ' '${words[qdwd]}' ' ]]; then
                            qdisc=${words[qdwd]}
                            _tc_qdisc_options $qdisc && return 0
                        fi
                    done
                    _tc_one_of_list $QDISC_KIND
                    _tc_one_of_list 'root parent'
                    _tc_once_attr 'classid'
                    ;;
                show)
                    _tc_once_attr 'dev'
                    _tc_one_of_list 'root parent'
                    _tc_once_attr '-statistics -details -raw -pretty -iec \
                        -graph -name'
                    ;;
                help)
                    return 0
                    ;;
                *)
                    [[ $cword -eq $subcword ]] && \
                        COMPREPLY=( $( compgen -W 'help add delete change \
                            replace show' -- "$cur" ) )
                    ;;
            esac
            ;;

        filter)
            case $subcmd in
                add|change|replace|del|delete)
                    if [[ $(($cword-$subcword)) -eq 1 ]]; then
                        COMPREPLY=( $( compgen -W 'dev' -- "$cur" ) )
                        return 0
                    fi
                    local filter fltwd
                    for ((fltwd=$subcword; fltwd < ${#words[@]}-1; fltwd++));
                    do
                        if [[ $FILTER_KIND =~ ' '${words[fltwd]}' ' ]]; then
                            _tc_filter_options $fltwd && return 0
                        fi
                    done
                    _tc_one_of_list $FILTER_KIND
                    _tc_one_of_list 'root ingress egress parent'
                    _tc_once_attr 'handle estimator pref protocol'
                    ;;
                show)
                    _tc_once_attr 'dev'
                    _tc_one_of_list 'root ingress egress parent'
                    _tc_once_attr '-statistics -details -raw -pretty -iec \
                        -graph -name'
                    ;;
                help)
                    return 0
                    ;;
                *)
                    [[ $cword -eq $subcword ]] && \
                        COMPREPLY=( $( compgen -W 'help add delete change \
                            replace show' -- "$cur" ) )
                    ;;
            esac
            ;;

        action)
            case $subcmd in
                add|change|replace)
                    local action acwd
                    for ((acwd=$subcword; acwd < ${#words[@]}-1; acwd++)); do
                        if [[ $ACTION_KIND =~ ' '${words[acwd]}' ' ]]; then
                            _tc_action_options $acwd && return 0
                        fi
                    done
                    _tc_one_of_list $ACTION_KIND
                    ;;
                get|del|delete)
                    _tc_once_attr 'index'
                    ;;
                lst|list|flush|show)
                    _tc_one_of_list $ACTION_KIND
                    ;;
                *)
                    [[ $cword -eq $subcword ]] && \
                        COMPREPLY=( $( compgen -W 'help add delete change \
                            replace show list flush action' -- "$cur" ) )
                    ;;
            esac
            ;;

        monitor)
            COMPREPLY=( $( compgen -W 'help' -- "$cur" ) )
            ;;

        exec)
            case $subcmd in
                bpf)
                    local excmd exwd EXEC_KIND=' import debug graft '
                    for ((exwd=$subcword; exwd < ${#words[@]}-1; exwd++)); do
                        if [[ $EXEC_KIND =~ ' '${words[exwd]}' ' ]]; then
                            excmd=${words[exwd]}
                            _tc_exec_options $excmd && return 0
                        fi
                    done
                    _tc_one_of_list $EXEC_KIND
                    ;;
                *)
                    [[ $cword -eq $subcword ]] && \
                        COMPREPLY=( $( compgen -W 'bpf' -- "$cur" ) )
                    ;;
            esac
            ;;
    esac
} &&
complete -F _tc tc

# ex: ts=4 sw=4 et filetype=sh