挂机保护：低级区域防骚扰机制

-- 错误：全图无差别自由攻击
function onAttack(p, target)
    doAttack(p, target)
end

local SAFE_MAP = "0"
local GAP = 20
local function canAttack(p, target)
    if getplayvar(p, "MAP") == SAFE_MAP then
        sendmsg(p, 1, "庇护区内禁止攻击")
        return false
    end
    local lp = getplayvar(p, "LEVEL") or 1
    local lt = getplayvar(target, "LEVEL") or 1
    if lp - lt > GAP then
        sendmsg(p, 1, "对方等级过低，无法出手")
        return false
    end
    return true
end