luci实现的wifidog认证服务

利用luci写了个wifidog认证服务，实现直接openwrt路由器本地认证。直接安装ipk安装包，然后修改/etc/wifidog.conf文件(需要先安装wifidog)，如下：

AuthServer {
    Hostname 192.168.1.1
    Path /cgi-bin/luci/wdas/
    MsgScriptPathFragment gw_message/?
}

主要的源码如下：

module("luci.controller.wifidog.wdas", package.seeall)

local session = require "luci.wifidogsession"
local http = luci.http
local translate = luci.i18n.translate
local wdcfg = require("luci.wifidogconfig")

function index()
    local page    = node("wdas")
    page.target   = alias("wdas", "login")
    page.order    = 90
    page.i18n = "wifidogauth"
    page.setuser  = "nobody"
    page.setgroup = "nogroup"

    entry({"wdas", "login"}, call("login"))
    entry({"wdas", "logincheck"}, call("logincheck"))
    entry({"wdas", "auth"}, call("auth"))
    entry({"wdas", "ping"}, call("ping"))
    entry({"wdas", "portal"}, call("portal"))
    entry({"wdas", "gw_message"}, call("gw_message"))
end

function login()
    --login/?gw_id=&gw_address=&gw_port=&mac=&url=
    luci.template.render("wifidog/wdas_login")
end

function logincheck()
    local username, password = wdcfg.auth.username, wdcfg.auth.password
    local user, pwd, id, addr, port, mac, url, token
    user = http.formvalue("user")
    pwd = http.formvalue("pwd")
    id = http.formvalue("gw_id")
    addr = http.formvalue("gw_address")
    port = http.formvalue("gw_port")
    mac = http.formvalue("mac")
    url = http.formvalue("url")
    token = http.getcookie("wdastok")
    http.prepare_content("application/json")
    if addr and port and mac and (user == username) and (pwd == password) then
        token = token and token:match("^[a-f0-9]*$") or luci.sys.uniqueid(16)
        local sdt = {id=id, addr=addr, port=port, mac=mac, url=url, timestamp=luci.sys.uptime()}
        local path = (http.getenv("SCRIPT_NAME") or "") .. "/wdas"
        session.write(token, sdt)
        http.header("Set-Cookie", "wdastok=" .. token .. "; path=" .. path)
        http.write('{url:"http://' .. addr .. ':' .. port ..
            '/wifidog/auth?token=' .. token .. '"}')
    else
        if addr and port and mac then
            http.write('{error: "' .. translate("Invalid username or password.") .. '"}')
        else
            http.write('{error: "' .. translate("Invalid parameter.") .. '"}')
        end
    end
end

function auth()
    --auth/?stage=&ip=&mac=&token=&incoming=&outgoing=
    local stage, ip, mac, token, incoming, outgoing
    stage = http.formvalue("stage")
    ip = http.formvalue("ip")
    mac = http.formvalue("mac")
    token = http.formvalue("token")
    incoming = http.formvalue("incoming")
    outgoing = http.formvalue("outgoing")
    token = token and token:match("^[a-f0-9]*$")
    local sdt = token and session.read(token)
    if token and sdt and (mac == sdt.mac) then
        http.write("Auth: 1")
    else
        http.write("Auth: 0")
    end
end

function ping()
    --ping/?gw_id=&sys_load=&sys_memfree=&sys_load=&wifidog_uptime=
    local id, sys_uptime, sys_memfree, sys_load, wifidog_uptime
    id = http.formvalue("gw_id")
    sys_uptime = http.formvalue("sys_uptime")
    sys_memfree = http.formvalue("sys_memfree")
    sys_load = http.formvalue("sys_load")
    wifidog_uptime = http.formvalue("wifidog_uptime")
    if id and sys_uptime and sys_memfree and sys_load and wifidog_uptime then
        http.write("Pong")
    else
        http.write("{error:2}")
    end
end

function portal()
    --portal/?gw_id=%s
    local token, sdt, url
    token = http.getcookie("wdastok")
    sdt = token and session.read(token)
    url = sdt and sdt.url or "http://www.baidu.com"
    http.redirect(url)
end

function gw_message()
    local msg = http.formvalue("message")
    http.write(msg)
end

源码编译说明：
modules目录下的wifidogauth目录放到./feeds/luci/modules/下。

po/zh_CN/wifidogauth.po文件放到./feeds/luci/po/zh_CN/下。

./feeds/luci/contrib/package/luci/Makefile增加如下语句：

$(eval $(call module,wifidogauth,wifidog auth server,+luci-base))

然后 make menuconfig在luci-->Modules下找到luci-mod-wifidogauth选上。

make package/feeds/luci/luci/compile V=s

认证的用户名、密码的配置文件路径/etc/config/wifidogauth

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