【安全加密】异常登录防护：多设备同时在线的检测与拦截

-- 多设备检测：连接计数
local player = class(actor)
local activeConns = {}
local function checkMultiLogin(player, deviceId)
    local acct = getbaseinfo(player, 3)
    local conn = activeConns[acct]
    if conn and conn ~= deviceId then
        kickOldDevice(acct)
        sendmail("#" .. acct, 8051, "多设备登录提醒",
            "您的账号在新设备登录，原设备已断开连接。如非本人操作请立即修改密码。", "")
    end
    activeConns[acct] = deviceId
end

-- 踢出通知：断开提示
local player = class(actor)
local function kickOldDevice(acct)
    local oldConn = activeConns[acct]
    if oldConn then
        gmexecute(class(oldConn), "@Kick")
        sendmail("#" .. acct, 8052, "设备已断开",
            "您的账号在其他设备登录，当前设备已被断开连接。", "")
    end
end