set_rf_state() {
    local INTERFACE="$1" state="$2" RFKILL_NAME="$3"

    if [[ "$RFKILL" == "hard" ]]; then
        report_fail "Cannot set state on hardware rfkill switch"
        return 1
    fi
    local path=$(get_rf_path "$INTERFACE" "$RFKILL_NAME") || return 1
    case "$state" in
        enabled)
            echo 0 > "$path/soft"
        ;;
        disabled)
            echo 1 > "$path/soft"
        ;;
    esac
}

get_rf_path() {
    local INTERFACE="$1" RFKILL_NAME="$2" path

    if [[ -n "$RFKILL_NAME" ]]; then
        for path in /sys/class/rfkill/*; do
            if [[ "$(< "$path/name")" == "$RFKILL_NAME" ]]; then
                echo "$path"
                return 0
            fi
        done
        report_fail "no rfkill switch with name $RFKILL_NAME"
    else
        path=$(find -L "/sys/class/net/$INTERFACE/" -maxdepth 2 -type d -name "rfkill*" 2> /dev/null | head -n 1)
        if [[ -n "$path" ]]; then
            echo "$path"
            return 0
        fi
        report_fail "no rfkill switch available on interface $INTERFACE"
    fi
    return 1
}

enable_rf() {
    local INTERFACE="$1" RFKILL="$2" RFKILL_NAME="$3" path hard soft

    # Enable rfkill if necessary, or fail if it is hardware
    if [[ -n "$RFKILL" ]]; then
        path=$(get_rf_path "$INTERFACE" "$RFKILL_NAME") || return 1
        read hard < "$path/hard"
        read soft < "$path/soft"

        if (( hard )); then
            report_fail "radio is disabled on $INTERFACE"
            return 1
        elif (( soft )); then
            set_rf_state "$INTERFACE" enabled "$RFKILL_NAME" || return 1
            timeout_wait 1 "(( ! \$(< \"$path/soft\") ))"
        fi
    fi
}

# vim: ft=sh ts=4 et sw=4: