# bash completion for iptables

have iptables &&
_iptables()
{
    local cur prev table chain

    COMPREPLY=()
    _get_comp_words_by_ref cur prev
    chain='s/^Chain \([^ ]\{1,\}\).*$/\1/p'

    if [[ $COMP_LINE == *-t\ *filter* ]]; then
        table="-t filter"
    elif [[ $COMP_LINE == *-t\ *nat* ]]; then
        table="-t nat"
    elif [[ $COMP_LINE == *-t\ *mangle* ]]; then
        table="-t mangle"
    fi

    _split_longopt

    case $prev in
    -*[AIDRPFXLZ])
        COMPREPLY=( $( compgen -W '`iptables $table -nL | \
                sed -ne "s/^Chain \([^ ]\{1,\}\).*$/\1/p"`' -- "$cur" ) )
        ;;
    -*t)
        COMPREPLY=( $( compgen -W 'nat filter mangle' -- "$cur" ) )
        ;;
    -j)
        if [[ "$table" == "-t filter" || -z "$table" ]]; then
            COMPREPLY=( $( compgen -W 'ACCEPT DROP LOG ULOG REJECT \
                `iptables $table -nL | sed -ne "$chain" \
                -e "s/INPUT|OUTPUT|FORWARD|PREROUTING|POSTROUTING//"`' -- \
                "$cur" ) )
        elif [ "$table" = "-t nat" ]; then
            COMPREPLY=( $( compgen -W 'ACCEPT DROP LOG ULOG REJECT \
                MIRROR SNAT DNAT MASQUERADE `iptables $table -nL | \
                sed -ne "$chain" -e "s/OUTPUT|PREROUTING|POSTROUTING//"`' \
                -- "$cur" ) )
        elif [ "$table" = "-t mangle" ]; then
            COMPREPLY=( $( compgen -W 'ACCEPT DROP LOG ULOG REJECT \
                MARK TOS `iptables $table -nL | sed -ne "$chain" \
                -e "s/INPUT|OUTPUT|FORWARD|PREROUTING|POSTROUTING//"`' -- \
                "$cur" ) )
        fi
        ;;
    *)
        if [[ "$cur" == -* ]]; then
            COMPREPLY=( $( compgen -W '--in-interface --out-interface --source \
                --destination --protocol --fragment --match --append \
                --delete --insert --replace --list --flush --zero --new \
                --delete-chain --policy --rename-chain --proto --source \
                --destination --in-interface --jump --match --numeric \
                --out-interface --table --verbose --line-numbers --exact \
                --fragment --modprobe --set-counters --version' -- "$cur") )
        fi
        ;;
    esac

} &&
complete -F _iptables iptables

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