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# ip(8) completion                                         -*- shell-script -*-

_comp_cmd_ip__iproute2_etc()
{
    _comp_compgen -a split -- "$(_comp_awk '!/#/ { print $2 }' "/etc/iproute2/$1" \
        2>/dev/null)"
}

_comp_cmd_ip__netns()
{
    local unquoted
    _comp_split -l unquoted "$(
        {
            ${1-ip} -c=never netns list 2>/dev/null || ${1-ip} netns list
        } | command sed -e 's/ (.*//'
    )"
    # namespace names can have spaces, so we quote all of them if needed
    local ns quoted=()
    for ns in "${unquoted[@]}"; do
        local namespace
        printf -v namespace '%q' "$ns"
        quoted+=("$namespace")
    done
    ((${#quoted[@]})) && _comp_compgen -- -W '"${quoted[@]}"'
}

_comp_cmd_ip__link_types()
{
    _comp_compgen_split -- "$(
        {
            ${1-ip} -c=never link help || ${1-ip} link help
        } 2>&1 | command sed -e \
            '/TYPE := /,/}/!d' -e \
            's/.*{//' -e \
            's/}.*//' -e \
            's/|/ /g'
    )"
}

_comp_cmd_ip__neigh_states()
{
    _comp_compgen_split -- "$(
        {
            ${1-ip} -c=never neigh help || ${1-ip} neigh help
        } 2>&1 | command sed -e \
            '/STATE := /,/}/!d' -e \
            's/.*{//' -e \
            's/}.*//' -e \
            's/|/ /g'
    )"
}

_comp_cmd_ip()
{
    local cur prev words cword comp_args
    _comp_initialize -- "$@" || return

    case $prev in
        -V | -Version | -rc | -rcvbuf | -l | -loops)
            return
            ;;
        -f | -family)
            _comp_compgen -- -W 'inet inet6 ipx dnet link'
            return
            ;;
        -b | -batch)
            _comp_compgen_filedir
            return
            ;;
        -n | -netns)
            _comp_cmd_ip__netns "$1"
            return
            ;;
        -force)
            _comp_compgen -- -W '-batch'
            return
            ;;
    esac

    local subcword cmd="" has_cmd="" subcmd=""
    for ((subcword = 1; subcword < cword; subcword++)); do
        [[ ${words[subcword]} == -b?(atch) ]] && return
        [[ $has_cmd ]] && subcmd=${words[subcword]} && break
        [[ ${words[subcword]} != -* &&
            ${words[subcword - 1]} != -@(f?(amily)|rc?(vbuf)|n?(etns)) ]] &&
            cmd=${words[subcword]} has_cmd=set
    done

    if [[ ! $has_cmd ]]; then
        case $cur in
            -*)
                _comp_compgen -a help - <<<"$(
                    ((cword == 1)) && printf '%s\n' -force
                    {
                        "$1" -c=never help || "$1" help
                    } 2>&1 | command sed -e \
                        's/[{|}=]/\n/g' -e \
                        's/\[\([^]]\{1,\}\)\]/\1/g'
                )"
                ;;
            *)
                _comp_compgen_split -- "help $(
                    {
                        "$1" -c=never help || "$1" help
                    } 2>&1 | command sed -e \
                        '/OBJECT := /,/}/!d' -e \
                        's/.*{//' -e \
                        's/}.*//' -e \
                        's/|//g'
                )"
                ;;
        esac
        return
    fi

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

    case $cmd in
        l | link)
            case $subcmd in
                add)
                    # TODO
                    ;;
                afstats)
                    if [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    else
                        _comp_compgen -- -W 'dev'
                    fi
                    ;;
                delete)
                    if [[ $prev == type ]]; then
                        _comp_cmd_ip__link_types "$1"
                    else
                        _comp_compgen_available_interfaces
                        _comp_compgen -a -- -W 'type'
                    fi
                    ;;
                set | change)
                    if ((cword - subcword == 1)); then
                        _comp_compgen_available_interfaces
                    else
                        case $prev in
                            arp | dynamic | multicast | allmulticast | promisc | \
                                trailers)
                                _comp_compgen -- -W 'on off'
                                ;;
                            txqueuelen | name | address | broadcast | mtu | netns | alias) ;;

                            *)
                                local c="arp dynamic multicast allmulticast
                                    promisc trailers txqueuelen name address
                                    broadcast mtu netns alias"
                                [[ $prev != @(up|down) ]] && c+=" up down"
                                _comp_compgen -- -W "$c"
                                ;;
                        esac
                    fi
                    ;;
                show)
                    if ((cword == subcword + 1)); then
                        _comp_compgen_available_interfaces
                        _comp_compgen -a -- -W 'dev group up'
                    elif [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == group ]]; then
                        _comp_cmd_ip__iproute2_etc group
                    fi
                    ;;
                property)
                    if ((cword - 1 == subcword)); then
                        _comp_compgen -- -W 'add del'
                    elif [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == altname ]]; then
                        return
                    else
                        _comp_compgen -- -W 'dev altname'
                    fi
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add change delete set show property afstats'
                    ;;
            esac
            ;;

        a | addr | address)
            case $subcmd in
                add | change | replace)
                    case $prev in
                        dev | label)
                            _comp_compgen_available_interfaces
                            ;;
                        scope)
                            _comp_cmd_ip__iproute2_etc rt_scopes
                            ;;
                        broadcast | anycast | peer | metric)
                            :
                            ;;
                        valid_lft | preferred_lft)
                            _comp_compgen -- -W 'forever'
                            ;;
                        *)
                            _comp_compgen -- -W 'anycast autojoin broadcast dev home label scope nodad metric mngtmpaddr
			        noprefixroute valid_lft peer preferred_lft'
                            ;;
                    esac
                    ;;
                del)
                    if [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == scope ]]; then
                        _comp_cmd_ip__iproute2_etc rt_scopes
                    else
                        : # TODO
                    fi
                    ;;
                show | flush)
                    if ((cword == subcword + 1)); then
                        _comp_compgen_available_interfaces
                        _comp_compgen -a -- -W 'dev scope to label dynamic
                            permanent tentative deprecated dadfailed temporary
                            primary secondary up type'
                    elif [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == scope ]]; then
                        _comp_cmd_ip__iproute2_etc rt_scopes
                    elif [[ $prev == type ]]; then
                        _comp_cmd_ip__link_types "$1"
                    fi
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add change replace del show
                            flush'
                    ;;
            esac
            ;;

        addrlabel)
            case $subcmd in
                add | del)
                    if [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == prefix || $prev == label ]]; then
                        : # TODO - Is there a way to complete these?
                    else
                        _comp_compgen -- -W 'dev prefix label'
                    fi
                    ;;
                list | flush | help) ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help list add del flush'
                    ;;
            esac
            ;;

        r | route)
            case $subcmd in
                list | flush | save)
                    case "$prev" in
                        proto)
                            _comp_cmd_ip__iproute2_etc rt_protos
                            ;;
                        table)
                            _comp_compgen -- -W 'local main default all'
                            ;;
                        scope)
                            _comp_cmd_ip__iproute2_etc rt_scopes
                            ;;
                        root | match | exact | vrf)
                            : # TODO: Can we complete vrf?
                            ;;
                        type)
                            _comp_compgen -- -W 'unicast local broadcast multicast throw unreachable prohibit blackhole nat'
                            ;;
                        *)
                            _comp_compgen -- -W 'root match exact table vrf proto type scope'
                            ;;
                    esac
                    ;;
                get)
                    case $prev in
                        as | dport | from | sport | ipproto | vrf | to | tos | mark)
                            : # TODO: Can we complete ipproto, tos, or vrf?
                            ;;
                        uid)
                            _comp_compgen_uids
                            ;;
                        oif | iif | dev)
                            _comp_compgen_available_interfaces -a
                            ;;
                        *)
                            # TODO: 'iif' only works if also 'from' is specified
                            _comp_compgen -- -W 'as connected dport from fibmatch
			        iif ipproto mark notify oif sport to tos uid vrf'
                            ;;
                    esac
                    ;;
                a | add | d | del | change | append | r | replace)
                    if [[ $prev == via ]]; then
                        _comp_compgen_split -- "$(
                            {
                                "$1" -c=never r 2>/dev/null || "$1" r
                            } | command sed -ne \
                                's/.*via \([0-9.]*\).*/\1/p'
                        )"
                    elif [[ $prev == "$subcmd" ]]; then
                        _comp_compgen_split -- "table default $(
                            {
                                "$1" -c=never r 2>/dev/null || "$1" r
                            } | cut -d ' ' -f 1
                        )"
                    elif [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces -a
                    elif [[ $prev == table ]]; then
                        _comp_compgen -- -W 'local main default'
                    else
                        _comp_compgen -- -W 'via dev weight'
                    fi
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help list flush get add del change
                            append replace save showdump'
                    ;;
            esac
            ;;

        rule)
            case $subcmd in
                add | del | list | lst)
                    case $prev in
                        from | to | tos | dsfield | fwmark | uidrange | ipproto | sport | \
                            dport | priority | protocol | suppress_prefixlength | \
                            suppress_ifgroup | realms | nat | goto) ;;

                        iif | oif)
                            _comp_compgen_available_interfaces -a
                            ;;
                        table | lookup)
                            _comp_compgen -- -W 'local main default'
                            ;;
                        *)
                            _comp_compgen -- -W 'from to tos dsfield fwmark
                                uidrange ipproto sport dport priority table
                                lookup protocol suppress_prefixlength
                                suppress_ifgroup realms nat goto iif oif not'
                            ;;
                    esac
                    ;;
                flush | save)
                    if [[ $prev == protocol ]]; then
                        :
                    else
                        _comp_compgen -- -W 'protocol'
                    fi
                    ;;
                restore | show) ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add del list flush save
                            restore show'
                    ;;
            esac
            ;;
        stats)
            case "$subcmd" in
                show)
                    if [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == group ]]; then
                        _comp_compgen -- -W "$(
                            # stats command was added after color, should always have it
                            "$1" -c=never stats help 2>&1 |
                                command sed -e \
                                    '/^GROUP := /,/}/!d' -e \
                                    's/^GROUP := //g' -e \
                                    '/:=/d' -e \
                                    's/[{}|]//g'
                        )"
                    elif [[ $prev == subgroup || $prev == suite ]]; then
                        : # TODO: complete subgroup and suite
                    else
                        _comp_compgen -- -W 'dev group subgroup suite'
                    fi
                    ;;
                set)
                    if [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    elif [[ $prev == l3_stats ]]; then
                        _comp_compgen -- -W 'on off'
                    else
                        _comp_compgen -- -W 'dev l3_stats'
                    fi
                    ;;
                *)
                    _comp_compgen -- -W 'show set help'
                    ;;
            esac
            ;;

        n | neigh | neighbor | neighbour)
            case $subcmd in
                add | del | change | replace)
                    case $prev in
                        lladdr)
                            _comp_compgen_mac_addresses
                            ;;
                        nud)
                            _comp_cmd_ip__neigh_states "$1"
                            ;;
                        dev)
                            _comp_compgen_available_interfaces
                            ;;
                        protocol)
                            _comp_cmd_ip__iproute2_etc rt_protos
                            ;;
                        proxy)
                            :
                            ;;
                        *)
                            _comp_compgen -- -W 'lladdr nud proxy dev router use managed extern_learn protocol'
                            ;;
                    esac
                    ;;
                show | flush)
                    case "$prev" in
                        nud)
                            _comp_cmd_ip__neigh_states "$1"
                            ;;
                        dev)
                            _comp_compgen_available_interfaces
                            ;;
                        to | vrf) # TODO - Maybe we can complete vrf here?
                            :
                            ;;
                        *)
                            _comp_compgen -- -W 'proxy to nud vrf dev nomaster'
                            ;;
                    esac
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add del change replace show
                            flush'
                    ;;
            esac
            ;;

        ntable)
            case $subcmd in
                change)
                    # TODO
                    ;;
                show)
                    # TODO
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help change show'
                    ;;
            esac
            ;;

        tun | tunnel)
            case $subcmd in
                show) ;;

                add | change | del | prl | 6rd)
                    # TODO
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add change del show prl 6rd'
                    ;;
            esac
            ;;

        maddr)
            case $subcmd in
                add | del)
                    # TODO
                    ;;
                show)
                    if [[ $cword -eq $subcword+1 || $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                        if [[ $prev != dev ]]; then
                            _comp_compgen -a -W dev
                        fi
                    fi
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add del show'
                    ;;
            esac
            ;;

        mroute)
            case $subcmd in
                show)
                    # TODO
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help show'
                    ;;
            esac
            ;;

        monitor)
            case $subcmd in
                all) ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen_split -- "help all $(
                            {
                                "$1" -c=never monitor help || "$1" monitor help
                            } 2>&1 | command sed -e \
                                '/OBJECTS := /,/[^|]$/!d' -e \
                                's/OBJECTS := *//' -e \
                                's/|//g'
                        )"
                    ;;
            esac
            ;;

        net | netns)
            case $subcmd in
                list | monitor) ;;

                add | identify | list-id)
                    # TODO
                    ;;
                delete | pids | set)
                    [[ $prev == "$subcmd" ]] && _comp_cmd_ip__netns "$1"
                    ;;
                exec)
                    local all_offset=0 i
                    for ((i = 1; i <= cword; i++)); do
                        case ${words[i]} in
                            -a | -all)
                                all_offset=1
                                break
                                ;;
                        esac
                    done
                    if [[ $prev == "$subcmd" && $all_offset != 1 ]]; then
                        _comp_cmd_ip__netns "$1"
                    else
                        local offset
                        offset="$((subcword + 2 - all_offset))"
                        _comp_command_offset "$offset"
                    fi
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help add attach delete exec identify list
                            list-id monitor pids set'
                    ;;
            esac
            ;;

        netconf)
            case $subcmd in
                show)
                    if ((cword == subcword + 1)); then
                        _comp_compgen -- -W 'dev'
                    elif [[ $prev == dev ]]; then
                        _comp_compgen_available_interfaces
                    fi
                    ;;
                *)
                    ((cword == subcword)) && _comp_compgen -- -W 'help show'
                    ;;
            esac
            ;;

        xfrm)
            case $subcmd in
                state | policy | monitor)
                    # TODO
                    ;;
                *)
                    ((cword == subcword)) &&
                        _comp_compgen -- -W 'help state policy monitor'
                    ;;
            esac
            ;;
        help) ;;
        *)
            _comp_compgen -- -W 'help'
            ;;
    esac
} &&
    complete -F _comp_cmd_ip ip

# ex: filetype=sh