【网络通信】数据校验：关键消息的完整性校验

-- 数据校验：计算与组装
local player = class(actor)
local SECRET = "verify_key_2026"
local function calcSum(data)
    local sum = 0
    for i = 1, #data do
        sum = (sum + string.byte(data, i) * i) % 4294967296
    end
    return sum
end
local function sendVerified(player, msgId, content)
    local sum = calcSum(content .. SECRET)
    sendluamsg(player, msgId, sum, #content, 0, content)
end

-- 接收校验：比对与告警
local player = class(actor)
local failCnt = 0
local function onVerifiedMsg(player, msgId, checkSum, contentLen, content)
    local actual = calcSum(content .. SECRET)
    if actual ~= checkSum then
        failCnt = failCnt + 1
        if failCnt >= 3 then
            sendmsg(player, 1, 0, "连续校验失败，连接已被服务端断开。")
            return
        end
        return
    end
    failCnt = 0
    sendmsg(player, 1, 0, "消息校验通过：" .. content)
end