951 lines
35 KiB
Go
951 lines
35 KiB
Go
package rpc
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import (
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"context"
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"encoding/hex"
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"fmt"
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"sync"
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"time"
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"go.uber.org/zap"
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"golang.org/x/sync/singleflight"
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"github.com/gotd/td/bin"
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"github.com/gotd/td/clock"
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"github.com/gotd/td/tg"
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"telesrv/internal/compat/layerwire"
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"telesrv/internal/domain"
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"telesrv/internal/observability/dbtrace"
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)
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// maxWrapperDepth 限制 invokeWithLayer/initConnection/invokeAfter 等 wrapper 的嵌套深度，防御恶意构造。
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// 合法客户端的最深包装来自 gotd 数据连接模式的握手初始化：
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// invokeWithLayer → invokeWithoutUpdates → initConnection → invokeWithoutUpdates → query（深度 5），
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// 官方服务器同样接受。取 8 留余量，仍是小常量、不削弱对无界嵌套的防御。
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const maxWrapperDepth = 8
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const maxInvokeAfterMsgIDs = 128
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// tempResolveResult 是 effectiveAuthKeyID 里 temp→perm 解析经 singleflight 共享的结果。
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type tempResolveResult struct {
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perm [8]byte
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ok bool
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}
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const (
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authKeyResolveSingleflightPrefix = "resolve:"
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authClientInfoSingleflightPrefix = "authinfo:"
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)
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var (
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tlTypeNamesOnce sync.Once
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tlTypeNames map[uint32]string
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)
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// Config 是 Router 所需的服务端信息。
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type Config struct {
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DC int
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IP string // 对外公布的 DC IP（写入 DCOptions）
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Port int // 对外公布的 DC 端口
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InstanceID string // 进程内唯一标识，用于跨实例 ephemeral push 去重。
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OutboundPushTimeout time.Duration
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SendRateLimit int
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SendRateWindow time.Duration
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// CatchupRateLimit/CatchupRateWindow 限制 difference 类 catch-up RPC（getChannelDifference /
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// getPeerDialogs）的每用户频率（设计 Phase 2 / §10.3）：nudge 被消费后客户端会触发这两类
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// catch-up，放开大群 nudge 全速前需 FLOOD_WAIT 兜底防风暴打爆 PG。两类各自独立计数、共用同一
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// 阈值。<=0 关闭（默认行为不变）。
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CatchupRateLimit int
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CatchupRateWindow time.Duration
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// ChannelNudgeMaxTargets 是一次 fan-out 的 >cap nudge 目标上限（设计 Phase 0b 限速兜底）；
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// <=0 用内置默认 defaultChannelNudgeMaxTargets。
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ChannelNudgeMaxTargets int
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// CallSignalingMaxBytes 是 phone.sendSignalingData 单条载荷上限；<=0 不限制。
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CallSignalingMaxBytes int
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// CallForceRelay 强制私聊通话 p2p_allowed=false（调试 TURN 中继路径）。
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CallForceRelay bool
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// GroupCallMaxParticipants 是群通话单房间参与者上限；<=0 不限制。
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GroupCallMaxParticipants int
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// TempKeyResolveCacheTTL 是 PFS temp→perm auth key 解析的进程内缓存有效期。>0 时同一 temp key
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// 在 TTL 内复用上次解析、跳过每帧 ResolveAuthKey 的 PG 查询；0（默认/测试）关闭=每帧重校验。
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// 显式撤销会删除协议 auth key、清缓存并断开活跃连接；TTL 只影响自然过期或异常路径下的
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// 下一次重新解析。re-bind 由 onAuthBindTempAuthKey 显式失效，避免跨账号串号。
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TempKeyResolveCacheTTL time.Duration
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// TempKeyResolveCacheMaxEntries 是 temp→perm 解析缓存容量；<=0 用内置默认。
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TempKeyResolveCacheMaxEntries int
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}
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// Router 把解密后的 RPC 请求按 TypeID 路由到 typed handler（tg.ServerDispatcher）。
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//
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// handler 输入输出均为 gotd/td/tg 类型，各业务域的 handler
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// 与注册见 help.go / auth.go / users.go / updates.go。Router 本身只负责协议外壳：
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// 剥离 invokeWithLayer / initConnection / invokeWithoutUpdates / invokeAfter*，并兜底未注册 RPC。
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type Router struct {
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cfg Config
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log *zap.Logger
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clock clock.Clock
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deps Deps
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dispatcher *tg.ServerDispatcher
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clientInfoMu sync.RWMutex
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clientInfo map[clientInfoSessionKey]clientSessionInfo
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authInfo map[[8]byte]clientSessionInfo
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authUserMu sync.RWMutex
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authUsers map[[8]byte]authUserCacheEntry
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authUserSF singleflight.Group
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mediaCountSF singleflight.Group
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dialogsPinnedSF singleflight.Group
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channelFullBotSF singleflight.Group
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presence *presenceTracker
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callbacks *callbackRegistry
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inlines *inlineRegistry
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webviews *webViewRegistry
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loginTokens *loginTokenRegistry
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instanceID string
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channelFanout *channelFanoutDispatcher
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// presenceCandidateCache 缓存 presence fan-out 的候选 peer 集合（联系人 ∪ 私聊对端，
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// online 过滤前），按 userID 短 TTL；零值 sync.Map 即可用，无需构造器初始化。候选集变动
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// 很慢（加好友/开新私聊），短 TTL 内复用避免 updateStatus 每次重跑 ~25-30 条 hydration 查询。
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presenceCandidateCache sync.Map // userID(int64) -> *presenceCandidateEntry
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// botStatus 永久缓存 userID->是否 bot。bot 标志按账号不可变（BotFather 注册即定，普通用户永不变 bot），
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// 故可无 TTL 缓存。userIsBot 在 PFS 连接上被 announceSessionOnline 每 RPC 调用，不缓存则每次一发
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// Users.ByID 重投影——开群洪峰 ~50 并发时退化成 ~300ms herd（既拖尾延迟也飙 PG CPU）。零值即可用。
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botStatus sync.Map // userID(int64) -> bool
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// lastSeenPersist 记录每个 user 最近一次 last_seen 落库时刻（unix），用于写去抖：
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// updateStatus 高频续期时数秒内只落一次 DB。
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lastSeenPersist sync.Map // userID(int64) -> int64(unix)
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// tempKeyResolveCache 缓存 rawTempKeyID -> resolved perm（带过期），容量有界。
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tempKeyResolveCache *tempKeyResolveCache
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storyProjectionCache *storyProjectionCache
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storyPinnedCache *storyPinnedAvailableCache
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storyPinnedListCache *storyPinnedStoriesCache
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channelFullBotCache *channelFullBotInfoCache
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userFullProjectionCache *userFullProjectionCache
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peerSettingsProjectionCache *peerSettingsProjectionCache
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channelFullProjectionCache *channelFullProjectionCache
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availableReactionDocuments availableReactionDocumentMapCache
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emojiStickers *emojiStickerIndex
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notifySettings *notifySettingsCache
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stickerCatalog *stickerCatalogCache
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transientPrivateBigReactions transientPrivateBigReactionCache
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accountSettings *accountSettingsCache
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// webPageResolveSem 是链接预览异步解析的并发信号量（有界）：发送后把 pending 占位
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// 解析为卡片并就地替换。满则丢弃任务（消息留 pending）。nil=未启用（测试可直接调
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// resolvePendingWebPage 同步验证）。
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webPageResolveSem chan struct{}
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}
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type clientInfoSessionKey struct {
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rawAuthKeyID [8]byte
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sessionID int64
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}
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type clientSessionInfo struct {
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layer int
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clientInfo ClientInfo
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hasClientInfo bool
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authorizationChecked bool
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}
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type authUserCacheEntry struct {
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userID int64
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found bool
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}
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// New 创建 Router，由各业务域自行注册其 RPC handler（registerHelp/Auth/Users/Updates）。
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func New(cfg Config, deps Deps, log *zap.Logger, clk clock.Clock) *Router {
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instanceID := cfg.InstanceID
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if instanceID == "" {
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instanceID = fmt.Sprintf("%016x", randomNonZeroInt64())
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}
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r := &Router{cfg: cfg, log: log, clock: clk, deps: deps, presence: newPresenceTracker(), callbacks: newCallbackRegistry(), inlines: newInlineRegistry(botInlineQueryTTL, deps.Inline), webviews: newWebViewRegistry(webViewSessionTTL, deps.Inline), loginTokens: newLoginTokenRegistry(), tempKeyResolveCache: newTempKeyResolveCache(cfg.TempKeyResolveCacheMaxEntries), storyProjectionCache: newStoryProjectionCache(clk.Now), storyPinnedCache: newStoryPinnedAvailableCache(clk.Now), storyPinnedListCache: newStoryPinnedStoriesCache(clk.Now), channelFullBotCache: newChannelFullBotInfoCache(clk.Now), userFullProjectionCache: newUserFullProjectionCache(clk.Now), peerSettingsProjectionCache: newPeerSettingsProjectionCache(clk.Now), channelFullProjectionCache: newChannelFullProjectionCache(clk.Now), emojiStickers: newEmojiStickerIndex(clk.Now), notifySettings: newNotifySettingsCache(clk.Now), stickerCatalog: newStickerCatalogCache(clk.Now), accountSettings: newAccountSettingsCache(clk.Now), instanceID: instanceID}
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r.channelFanout = newChannelFanoutDispatcher(r, defaultChannelFanoutShards, defaultChannelFanoutBuffer)
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r.webPageResolveSem = make(chan struct{}, webPageResolveConcurrency)
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d := tg.NewServerDispatcher(r.fallback)
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r.registerHelp(d)
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r.registerAuth(d)
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r.registerUsers(d)
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r.registerUpdates(d)
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r.registerAccount(d)
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r.registerMessages(d)
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r.registerStickers(d)
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r.registerChannels(d)
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r.registerUpload(d)
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r.registerPhotos(d)
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r.registerFolders(d)
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r.registerContacts(d)
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r.registerLangpack(d)
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r.registerStories(d)
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r.registerPhone(d)
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r.registerEncrypted(d)
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r.registerPayments(d)
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r.registerStats(d)
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r.registerPremium(d)
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r.registerAiCompose(d)
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r.registerBots(d)
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r.dispatcher = d
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return r
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}
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// Dispatch 路由一条 RPC 请求：先剥离 invokeWithLayer / initConnection /
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// invokeWithoutUpdates / invokeAfter* 等 wrapper（注入 layer / 客户端信息到 ctx），
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// 再按 TypeID 路由到 typed handler。满足 mtprotoedge.RPCHandler。
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func (r *Router) Dispatch(ctx context.Context, authKeyID [8]byte, sessionID int64, b *bin.Buffer) (bin.Encoder, error) {
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preStart := r.clock.Now()
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ctx = WithRawAuthKeyID(ctx, authKeyID)
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effectiveAuthKeyID, err := r.effectiveAuthKeyID(ctx, authKeyID, sessionID)
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if err != nil {
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return nil, internalErr()
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}
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tAuth := r.clock.Now()
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ctx = WithAuthKeyID(ctx, effectiveAuthKeyID)
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ctx = WithSessionID(ctx, sessionID)
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userID, hasUserID, err := r.effectiveUserID(ctx, authKeyID, effectiveAuthKeyID, sessionID)
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if err != nil {
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return nil, internalErr()
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}
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if hasUserID {
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ctx = WithUserID(ctx, userID)
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}
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tUser := r.clock.Now()
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info, hasClientMetadata := r.clientSessionInfo(ctx)
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if hasUserID {
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if authInfo, ok := r.clientSessionInfoFromAuthorization(ctx, userID, effectiveAuthKeyID, info); ok {
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info = mergeClientSessionInfo(info, authInfo)
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hasClientMetadata = true
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r.rememberClientSessionInfo(ctx, info)
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}
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}
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// 前置鉴权阶段（auth key 解析 / user 重校验 / client info）慢路径告警：超阈值才记，避免刷屏。
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// 常驻观测——正常应 ≪50ms；再现 >50ms 时按 auth_resolve / user_resolve / client_info 三段拆分
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// 即可定位（历史上 client_info ~1s 的根因是 DSN 用 localhost 触发 IPv6 连接回退，已改 127.0.0.1）。
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if r.log != nil {
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if tInfo := r.clock.Now(); tInfo.Sub(preStart) > 50*time.Millisecond {
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id, _ := b.PeekID()
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r.log.Info("slow pre-handler",
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zap.String("method", tlTypeName(id)),
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zap.Duration("pre_total", tInfo.Sub(preStart)),
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zap.Duration("auth_resolve", tAuth.Sub(preStart)),
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zap.Duration("user_resolve", tUser.Sub(tAuth)),
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zap.Duration("client_info", tInfo.Sub(tUser)),
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zap.Int64("session_id", sessionID),
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)
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}
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}
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if hasClientMetadata {
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if info.layer != 0 {
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ctx = WithLayer(ctx, info.layer)
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}
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if info.hasClientInfo {
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ctx = WithClientInfo(ctx, info.clientInfo)
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}
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}
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return r.dispatch(ctx, b, 0)
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}
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func (r *Router) effectiveAuthKeyID(ctx context.Context, rawAuthKeyID [8]byte, sessionID int64) ([8]byte, error) {
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var (
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cached [8]byte
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hasCached bool
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)
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if r.deps.Sessions != nil {
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if scoped, ok := r.deps.Sessions.(ScopedSessionBinder); ok {
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if id, ok := scoped.AuthKeyIDForSession(rawAuthKeyID, sessionID); ok {
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cached = id
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hasCached = true
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}
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} else if id, ok := r.deps.Sessions.AuthKeyID(sessionID); ok {
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cached = id
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hasCached = true
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}
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}
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if hasCached {
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if cached == rawAuthKeyID || r.deps.Auth == nil {
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return cached, nil
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}
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// temp→perm 解析缓存：PFS 连接每帧都要解析一次 temp key（ResolveAuthKey 打 PG）。TTL 内复用
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// 上次解析、跳过 DB。仅当缓存的 perm 仍等于 session binder 当前 perm 才用（rebind 会改 binder
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// 且 onAuthBindTempAuthKey / 授权撤销都会显式 Delete 缓存，双保险防跨账号串号和被踢滞后）。
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ttl := r.cfg.TempKeyResolveCacheTTL
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if ttl > 0 {
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if perm, ok := r.tempKeyResolveCache.Get(rawAuthKeyID, cached, r.clock.Now()); ok {
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return perm, nil
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}
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}
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// cold burst 下并发 temp-key 解析用 singleflight 合并：同一 temp key 的 N 个并发 RPC 只打
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// 1 次 PG ResolveAuthKey（其余共享），避免开群/重连首帧 ~50 并发 herd（曾让 auth_resolve 飙到
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// ~1s）。解析结果 + 缓存写入在 SF 内（幂等共享）；session 绑定仍每 caller 各自做（按 session）。
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// 顺序调用不合并（SF 仅合并真并发），「每帧重校验」语义与固化测试 resolveCount 不变。
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v, sfErr, _ := r.authUserSF.Do(authKeyResolveSingleflightPrefix+string(rawAuthKeyID[:]), func() (any, error) {
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if ttl > 0 {
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if perm, ok := r.tempKeyResolveCache.Get(rawAuthKeyID, cached, r.clock.Now()); ok {
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return tempResolveResult{perm: perm, ok: true}, nil
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}
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}
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resolved, ok, err := r.deps.Auth.ResolveAuthKey(ctx, rawAuthKeyID)
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if err != nil {
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return tempResolveResult{}, err
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}
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if ok && ttl > 0 {
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r.tempKeyResolveCache.Store(rawAuthKeyID, resolved, r.clock.Now().Add(ttl), r.clock.Now())
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}
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return tempResolveResult{perm: resolved, ok: ok}, nil
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})
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if sfErr != nil {
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return [8]byte{}, sfErr
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}
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out := v.(tempResolveResult)
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if out.ok {
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if out.perm != cached {
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r.bindEffectiveAuthKey(rawAuthKeyID, sessionID, out.perm)
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}
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return out.perm, nil
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}
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r.tempKeyResolveCache.Delete(rawAuthKeyID)
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r.invalidateAuthUserCache(cached)
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r.bindEffectiveAuthKey(rawAuthKeyID, sessionID, rawAuthKeyID)
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return rawAuthKeyID, nil
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}
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effective := rawAuthKeyID
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if r.deps.Auth != nil {
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resolved, ok, err := r.deps.Auth.ResolveAuthKey(ctx, rawAuthKeyID)
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if err != nil {
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return [8]byte{}, err
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}
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if ok {
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effective = resolved
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}
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}
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r.bindEffectiveAuthKey(rawAuthKeyID, sessionID, effective)
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return effective, nil
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}
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func (r *Router) bindEffectiveAuthKey(rawAuthKeyID [8]byte, sessionID int64, effective [8]byte) {
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if r.deps.Sessions != nil {
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if scoped, ok := r.deps.Sessions.(ScopedSessionBinder); ok {
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scoped.BindAuthKeyForSession(rawAuthKeyID, sessionID, effective)
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} else {
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r.deps.Sessions.BindAuthKey(sessionID, effective)
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}
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}
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}
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func (r *Router) effectiveUserID(ctx context.Context, rawAuthKeyID, authKeyID [8]byte, sessionID int64) (int64, bool, error) {
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if userID, ok := UserIDFrom(ctx); ok {
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if scoped, ok := r.scopedSessions(); ok {
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scoped.BindUserForAuthKey(rawAuthKeyID, sessionID, userID)
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} else if r.deps.Sessions != nil {
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r.deps.Sessions.BindUser(sessionID, userID)
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}
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return userID, true, nil
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}
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if r.deps.Sessions != nil {
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if scoped, ok := r.deps.Sessions.(ScopedSessionBinder); ok {
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if userID, resolved := scoped.UserIDResolvedForAuthKey(rawAuthKeyID, sessionID); resolved {
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if userID == 0 {
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if cachedUserID, ok := r.positiveCachedAuthUser(authKeyID); ok {
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scoped.BindUserForAuthKey(rawAuthKeyID, sessionID, cachedUserID)
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r.announceSessionOnline(ctx, cachedUserID)
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return cachedUserID, true, nil
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}
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}
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return userID, userID != 0, nil
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}
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} else if userID, resolved := r.deps.Sessions.UserIDResolved(sessionID); resolved {
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if userID == 0 {
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if cachedUserID, ok := r.positiveCachedAuthUser(authKeyID); ok {
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r.deps.Sessions.BindUser(sessionID, cachedUserID)
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r.announceSessionOnline(ctx, cachedUserID)
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return cachedUserID, true, nil
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}
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}
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return userID, userID != 0, nil
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}
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}
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if r.deps.Auth == nil {
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return 0, false, nil
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}
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var (
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userID int64
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found bool
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err error
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)
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userID, found, err = r.lookupAuthUser(ctx, authKeyID)
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if err != nil {
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return 0, false, err
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}
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if r.deps.Sessions != nil {
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if scoped, ok := r.deps.Sessions.(ScopedSessionBinder); ok {
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if cachedUserID, resolved := scoped.UserIDResolvedForAuthKey(rawAuthKeyID, sessionID); resolved {
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if cachedUserID != 0 || !found {
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return cachedUserID, cachedUserID != 0, nil
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}
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||
}
|
||
} else {
|
||
if cachedUserID, resolved := r.deps.Sessions.UserIDResolved(sessionID); resolved {
|
||
if cachedUserID != 0 || !found {
|
||
return cachedUserID, cachedUserID != 0, nil
|
||
}
|
||
}
|
||
}
|
||
if found {
|
||
if scoped, ok := r.deps.Sessions.(ScopedSessionBinder); ok {
|
||
scoped.BindUserForAuthKey(rawAuthKeyID, sessionID, userID)
|
||
} else {
|
||
r.deps.Sessions.BindUser(sessionID, userID)
|
||
}
|
||
r.announceSessionOnline(ctx, userID)
|
||
} else {
|
||
if scoped, ok := r.deps.Sessions.(ScopedSessionBinder); ok {
|
||
scoped.BindUserForAuthKey(rawAuthKeyID, sessionID, 0)
|
||
} else {
|
||
r.deps.Sessions.BindUser(sessionID, 0)
|
||
}
|
||
}
|
||
}
|
||
return userID, found, nil
|
||
}
|
||
|
||
func (r *Router) lookupAuthUser(ctx context.Context, authKeyID [8]byte) (int64, bool, error) {
|
||
if userID, found, ok := r.cachedAuthUser(authKeyID); ok {
|
||
return userID, found, nil
|
||
}
|
||
key := string(authKeyID[:])
|
||
v, err, _ := r.authUserSF.Do(key, func() (any, error) {
|
||
if userID, found, ok := r.cachedAuthUser(authKeyID); ok {
|
||
return authUserCacheEntry{userID: userID, found: found}, nil
|
||
}
|
||
userID, found, err := r.deps.Auth.UserID(ctx, authKeyID)
|
||
if err != nil {
|
||
return authUserCacheEntry{}, err
|
||
}
|
||
r.setAuthUserCache(authKeyID, userID, found)
|
||
return authUserCacheEntry{userID: userID, found: found}, nil
|
||
})
|
||
if err != nil {
|
||
return 0, false, err
|
||
}
|
||
entry := v.(authUserCacheEntry)
|
||
return entry.userID, entry.found, nil
|
||
}
|
||
|
||
func (r *Router) cachedAuthUser(authKeyID [8]byte) (int64, bool, bool) {
|
||
r.authUserMu.RLock()
|
||
defer r.authUserMu.RUnlock()
|
||
entry, ok := r.authUsers[authKeyID]
|
||
if !ok {
|
||
return 0, false, false
|
||
}
|
||
return entry.userID, entry.found, true
|
||
}
|
||
|
||
func (r *Router) positiveCachedAuthUser(authKeyID [8]byte) (int64, bool) {
|
||
userID, found, ok := r.cachedAuthUser(authKeyID)
|
||
if !ok || !found || userID == 0 {
|
||
return 0, false
|
||
}
|
||
return userID, true
|
||
}
|
||
|
||
func (r *Router) setAuthUserCache(authKeyID [8]byte, userID int64, found bool) {
|
||
r.authUserMu.Lock()
|
||
defer r.authUserMu.Unlock()
|
||
if r.authUsers == nil {
|
||
r.authUsers = make(map[[8]byte]authUserCacheEntry)
|
||
}
|
||
if _, exists := r.authUsers[authKeyID]; !exists {
|
||
evictMapEntryIfFullLocked(r.authUsers, maxAuthUsersCached)
|
||
}
|
||
r.authUsers[authKeyID] = authUserCacheEntry{userID: userID, found: found}
|
||
}
|
||
|
||
func (r *Router) invalidateAuthUserCache(authKeyID [8]byte) {
|
||
r.authUserMu.Lock()
|
||
delete(r.authUsers, authKeyID)
|
||
r.authUserMu.Unlock()
|
||
r.clientInfoMu.Lock()
|
||
delete(r.authInfo, authKeyID)
|
||
r.clientInfoMu.Unlock()
|
||
key := string(authKeyID[:])
|
||
r.authUserSF.Forget(key)
|
||
r.authUserSF.Forget(authKeyResolveSingleflightPrefix + key)
|
||
r.authUserSF.Forget(authClientInfoSingleflightPrefix + key)
|
||
}
|
||
|
||
func (r *Router) scopedSessions() (ScopedSessionBinder, bool) {
|
||
if r.deps.Sessions == nil {
|
||
return nil, false
|
||
}
|
||
scoped, ok := r.deps.Sessions.(ScopedSessionBinder)
|
||
return scoped, ok
|
||
}
|
||
|
||
func (r *Router) dispatch(ctx context.Context, b *bin.Buffer, depth int) (bin.Encoder, error) {
|
||
if depth > maxWrapperDepth {
|
||
return nil, wrapperTooDeepErr()
|
||
}
|
||
|
||
id, err := b.PeekID()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
switch id {
|
||
case tg.InvokeWithLayerRequestTypeID:
|
||
if err := b.ConsumeID(id); err != nil {
|
||
return nil, err
|
||
}
|
||
layer, err := b.Int()
|
||
if err != nil {
|
||
return nil, fmt.Errorf("decode invokeWithLayer layer: %w", err)
|
||
}
|
||
// query 紧跟 layer，buffer 剩余即内层请求。
|
||
ctx = WithLayer(ctx, layer)
|
||
r.rememberClientLayer(ctx, layer)
|
||
return r.dispatch(ctx, b, depth+1)
|
||
|
||
case tg.InvokeWithoutUpdatesRequestTypeID:
|
||
if err := b.ConsumeID(id); err != nil {
|
||
return nil, err
|
||
}
|
||
return r.dispatch(withInvokeWithoutUpdates(ctx), b, depth+1)
|
||
|
||
case tg.InvokeAfterMsgRequestTypeID:
|
||
if err := b.ConsumeID(id); err != nil {
|
||
return nil, err
|
||
}
|
||
if _, err := b.Long(); err != nil {
|
||
return nil, fmt.Errorf("decode invokeAfterMsg msg_id: %w", err)
|
||
}
|
||
return r.dispatch(ctx, b, depth+1)
|
||
|
||
case tg.InvokeAfterMsgsRequestTypeID:
|
||
if err := b.ConsumeID(id); err != nil {
|
||
return nil, err
|
||
}
|
||
msgIDs, err := b.VectorHeader()
|
||
if err != nil {
|
||
return nil, fmt.Errorf("decode invokeAfterMsgs msg_ids: %w", err)
|
||
}
|
||
if msgIDs > maxInvokeAfterMsgIDs {
|
||
return nil, fmt.Errorf("decode invokeAfterMsgs msg_ids: too many ids %d", msgIDs)
|
||
}
|
||
for i := 0; i < msgIDs; i++ {
|
||
if _, err := b.Long(); err != nil {
|
||
return nil, fmt.Errorf("decode invokeAfterMsgs msg_ids[%d]: %w", i, err)
|
||
}
|
||
}
|
||
return r.dispatch(ctx, b, depth+1)
|
||
|
||
case tg.InitConnectionRequestTypeID:
|
||
req := &tg.InitConnectionRequest{Query: &rawObject{}}
|
||
if err := req.Decode(b); err != nil {
|
||
return nil, fmt.Errorf("decode initConnection: %w", err)
|
||
}
|
||
info := ClientInfo{
|
||
APIID: req.APIID,
|
||
DeviceModel: req.DeviceModel,
|
||
SystemVersion: req.SystemVersion,
|
||
AppVersion: req.AppVersion,
|
||
SystemLangCode: req.SystemLangCode,
|
||
LangPack: req.LangPack,
|
||
LangCode: req.LangCode,
|
||
}
|
||
ctx = WithClientInfo(ctx, info)
|
||
r.rememberClientInfo(ctx, info)
|
||
r.log.Debug("initConnection",
|
||
zap.Int("api_id", req.APIID),
|
||
zap.String("device", req.DeviceModel),
|
||
zap.String("app_version", req.AppVersion),
|
||
zap.Int("layer", LayerFrom(ctx)),
|
||
zap.String("client_type", string(ClientTypeFrom(ctx))),
|
||
)
|
||
inner, ok := req.Query.(*rawObject)
|
||
if !ok {
|
||
return nil, fmt.Errorf("initConnection query: unexpected type %T", req.Query)
|
||
}
|
||
return r.dispatch(ctx, &bin.Buffer{Buf: inner.data}, depth+1)
|
||
|
||
default:
|
||
// 入站兼容统一入口（先于鉴权门/dispatcher）：layerwire 把老客户端请求升级为
|
||
// canonical(227) 形态——①官方层漂移（生成表，flag-gated 新增→换 4 字节 id）
|
||
// ②客户端构造器漂移（client_aliases 纯换 id / client-drift.tl 通用 body 变换：
|
||
// 插 flags、按 kind 补默认、类型转换、改名映射）。替代了原先散落在 rpc 的
|
||
// dispatchCompat + 各 handleLegacy* 解码器。提前到鉴权门之前，使后续一切只面对 227
|
||
// 形态（鉴权白名单、dispatcher 均无需再认旧构造器 id）。
|
||
if id != 0 {
|
||
clientDrift := layerwire.IsClientDrift(id)
|
||
if up, ok, err := layerwire.UpgradeInbound(id, b); ok {
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
b = up
|
||
newID, err := b.PeekID()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
id = newID
|
||
if clientDrift {
|
||
// 客户端漂移多来自未完整 initConnection 的 DrKLO；按既有行为在
|
||
// 类型/层未知时兜底为 android（withAndroidCompatMetadata 自带 unknown 守卫）。
|
||
ctx = r.withAndroidCompatMetadata(ctx)
|
||
}
|
||
}
|
||
}
|
||
if r.deps.Auth != nil {
|
||
if _, ok := UserIDFrom(ctx); !ok && !rpcAllowedWithoutAuthorization(id) {
|
||
fields := append([]zap.Field{
|
||
zap.String("method", tlTypeName(id)),
|
||
zap.String("type_id", fmt.Sprintf("%#x", id)),
|
||
}, r.contextLogFields(ctx)...)
|
||
r.log.Info("RPC rejected before authorization", fields...)
|
||
return nil, authKeyUnregisteredErr()
|
||
}
|
||
}
|
||
// 任何未包 invokeWithoutUpdates 的已登录 RPC 都把当前 session 视为 updates
|
||
// 接收者。仅靠 updates.getState/getDifference 置位会漏掉 DrKLO 热恢复：
|
||
// 它重连后不重建同步基线（pts 在进程内存里），只发普通业务请求，置位
|
||
// 永不发生时主动推送会一直暂存直至超时丢弃，表现为另一端消息不再实时同步。
|
||
r.maybeMarkSessionReceivesUpdates(ctx)
|
||
dbBefore := dbtrace.SnapshotFromContext(ctx)
|
||
start := time.Now()
|
||
enc, err := r.dispatcher.Handle(ctx, b)
|
||
dur := time.Since(start)
|
||
dbDelta := dbtrace.SnapshotFromContext(ctx).Sub(dbBefore)
|
||
fields := append([]zap.Field{
|
||
zap.String("method", tlTypeName(id)),
|
||
zap.String("type_id", fmt.Sprintf("%#x", id)),
|
||
zap.Duration("dur", dur),
|
||
}, r.contextLogFields(ctx)...)
|
||
fields = dbtrace.AppendZapFields(fields, "handler_", dbDelta)
|
||
if err != nil || dur > 100*time.Millisecond {
|
||
if err != nil {
|
||
fields = append(fields, zap.Error(err))
|
||
}
|
||
r.log.Info("RPC inner handled", fields...)
|
||
} else {
|
||
r.log.Debug("RPC inner handled", fields...)
|
||
}
|
||
return enc, err
|
||
}
|
||
}
|
||
|
||
func tlTypeName(id uint32) string {
|
||
tlTypeNamesOnce.Do(func() {
|
||
names := tg.NamesMap()
|
||
tlTypeNames = make(map[uint32]string, len(names))
|
||
for name, typeID := range names {
|
||
tlTypeNames[typeID] = name
|
||
}
|
||
})
|
||
if name, ok := tlTypeNames[id]; ok {
|
||
return name
|
||
}
|
||
return fmt.Sprintf("%#x", id)
|
||
}
|
||
|
||
// maxClientInfoEntries / maxAuthInfoEntries 是客户端元数据缓存的容量上限兜底。
|
||
// 条目含客户端可控字符串且 session_id 由客户端任意生成，无上限时恶意客户端
|
||
// 在单连接上反复换 session_id / 轮换 temp auth key 可线速膨胀直至 OOM。
|
||
// 达到上限后驱逐任意旧条目：受害条目只损失 layer/clientType 缓存，
|
||
// 下一次 initConnection 或 authorization 回填即恢复。
|
||
const (
|
||
maxClientInfoEntries = 1 << 16
|
||
maxAuthInfoEntries = 1 << 16
|
||
// maxAuthUsersCached 给 authUsers 授权缓存设容量上界，与 clientInfo/authInfo 一致。
|
||
// 原本无任何上限：设备轮换 temp 键而不显式登出时每个新 authKeyID 永久累积一条，
|
||
// 只靠 logout/reset 的显式 invalidate 清理。达上限驱逐任意旧条目，下次按需回查回填。
|
||
maxAuthUsersCached = 1 << 16
|
||
)
|
||
|
||
func (r *Router) rememberClientInfo(ctx context.Context, info ClientInfo) {
|
||
info = normalizeClientInfo(info)
|
||
layer := LayerFrom(ctx)
|
||
r.mutateClientSessionInfo(ctx, func(sessionInfo *clientSessionInfo) {
|
||
sessionInfo.clientInfo = info
|
||
sessionInfo.hasClientInfo = true
|
||
if layer != 0 {
|
||
sessionInfo.layer = layer
|
||
}
|
||
})
|
||
}
|
||
|
||
func (r *Router) rememberClientLayer(ctx context.Context, layer int) {
|
||
r.mutateClientSessionInfo(ctx, func(sessionInfo *clientSessionInfo) {
|
||
sessionInfo.layer = layer
|
||
})
|
||
}
|
||
|
||
// NegotiatedLayer returns the TL layer the given session negotiated via
|
||
// invokeWithLayer/initConnection. It is keyed first by (auth_key, session) then
|
||
// falls back to the stable auth_key — so a reconnect with a new session_id still
|
||
// inherits the layer within the process lifetime. ok=false means no layer was
|
||
// ever observed (cold connection, or the in-memory entry was evicted): callers
|
||
// MUST NOT overwrite a connection's last-known layer in that case, only treat it
|
||
// as canonical (227) when no value was ever recorded.
|
||
func (r *Router) NegotiatedLayer(authKeyID [8]byte, sessionID int64) (int, bool) {
|
||
r.clientInfoMu.RLock()
|
||
defer r.clientInfoMu.RUnlock()
|
||
if info, ok := r.clientInfo[clientInfoSessionKey{rawAuthKeyID: authKeyID, sessionID: sessionID}]; ok && info.layer != 0 {
|
||
return info.layer, true
|
||
}
|
||
if info, ok := r.authInfo[authKeyID]; ok && info.layer != 0 {
|
||
return info.layer, true
|
||
}
|
||
return currentClientLayer, false
|
||
}
|
||
|
||
// mutateClientSessionInfo 在单个临界区内完成「读旧值-修改-写回」，避免
|
||
// RLock 读出与 Lock 写回之间被并发写覆盖的窗口。
|
||
func (r *Router) mutateClientSessionInfo(ctx context.Context, mutate func(*clientSessionInfo)) {
|
||
rawAuthKeyID, ok := RawAuthKeyIDFrom(ctx)
|
||
if !ok {
|
||
return
|
||
}
|
||
sessionID, ok := SessionIDFrom(ctx)
|
||
if !ok {
|
||
return
|
||
}
|
||
r.clientInfoMu.Lock()
|
||
defer r.clientInfoMu.Unlock()
|
||
if r.clientInfo == nil {
|
||
r.clientInfo = make(map[clientInfoSessionKey]clientSessionInfo)
|
||
}
|
||
sessionKey := clientInfoSessionKey{rawAuthKeyID: rawAuthKeyID, sessionID: sessionID}
|
||
sessionInfo, exists := r.clientInfo[sessionKey]
|
||
mutate(&sessionInfo)
|
||
if !exists {
|
||
evictMapEntryIfFullLocked(r.clientInfo, maxClientInfoEntries)
|
||
}
|
||
r.clientInfo[sessionKey] = sessionInfo
|
||
r.rememberAuthClientInfoLocked(rawAuthKeyID, sessionInfo)
|
||
if authKeyID, ok := AuthKeyIDFrom(ctx); ok {
|
||
r.rememberAuthClientInfoLocked(authKeyID, sessionInfo)
|
||
}
|
||
}
|
||
|
||
func (r *Router) rememberClientSessionInfo(ctx context.Context, sessionInfo clientSessionInfo) {
|
||
rawAuthKeyID, ok := RawAuthKeyIDFrom(ctx)
|
||
if !ok {
|
||
return
|
||
}
|
||
sessionID, ok := SessionIDFrom(ctx)
|
||
if !ok {
|
||
return
|
||
}
|
||
r.clientInfoMu.Lock()
|
||
defer r.clientInfoMu.Unlock()
|
||
if r.clientInfo == nil {
|
||
r.clientInfo = make(map[clientInfoSessionKey]clientSessionInfo)
|
||
}
|
||
sessionKey := clientInfoSessionKey{rawAuthKeyID: rawAuthKeyID, sessionID: sessionID}
|
||
if _, exists := r.clientInfo[sessionKey]; !exists {
|
||
evictMapEntryIfFullLocked(r.clientInfo, maxClientInfoEntries)
|
||
}
|
||
r.clientInfo[sessionKey] = mergeClientSessionInfo(r.clientInfo[sessionKey], sessionInfo)
|
||
r.rememberAuthClientInfoLocked(rawAuthKeyID, sessionInfo)
|
||
if authKeyID, ok := AuthKeyIDFrom(ctx); ok {
|
||
r.rememberAuthClientInfoLocked(authKeyID, sessionInfo)
|
||
}
|
||
}
|
||
|
||
func (r *Router) rememberAuthClientInfoLocked(authKeyID [8]byte, info clientSessionInfo) {
|
||
if r.authInfo == nil {
|
||
r.authInfo = make(map[[8]byte]clientSessionInfo)
|
||
}
|
||
if _, exists := r.authInfo[authKeyID]; !exists {
|
||
evictMapEntryIfFullLocked(r.authInfo, maxAuthInfoEntries)
|
||
}
|
||
current := r.authInfo[authKeyID]
|
||
r.authInfo[authKeyID] = mergeClientSessionInfo(current, info)
|
||
}
|
||
|
||
// forgetClientSessionInfo 随连接下线移除该 session 的元数据缓存条目，并清掉以该 raw
|
||
// auth_key 为键的 authInfo 兜底条目，使 authInfo 收敛到活跃 raw auth key（主导的单
|
||
// session/key 场景下严格回收）。共享同一 raw auth_key 的其它 session 若仍在线，会在下一次
|
||
// initConnection/authorization 回填——authInfo 只是廉价的元数据兜底。temp→perm 解析后以
|
||
// 业务 perm key 为键的条目仍靠容量上限兜底（SessionOffline 不带业务 key，无法在此精确清理）。
|
||
func (r *Router) forgetClientSessionInfo(rawAuthKeyID [8]byte, sessionID int64) {
|
||
r.clientInfoMu.Lock()
|
||
delete(r.clientInfo, clientInfoSessionKey{rawAuthKeyID: rawAuthKeyID, sessionID: sessionID})
|
||
delete(r.authInfo, rawAuthKeyID)
|
||
r.clientInfoMu.Unlock()
|
||
}
|
||
|
||
func evictMapEntryIfFullLocked[K comparable, V any](m map[K]V, limit int) {
|
||
if len(m) < limit {
|
||
return
|
||
}
|
||
for k := range m {
|
||
delete(m, k)
|
||
return
|
||
}
|
||
}
|
||
|
||
func (r *Router) clientSessionInfo(ctx context.Context) (clientSessionInfo, bool) {
|
||
rawAuthKeyID, ok := RawAuthKeyIDFrom(ctx)
|
||
if !ok {
|
||
return clientSessionInfo{}, false
|
||
}
|
||
sessionID, ok := SessionIDFrom(ctx)
|
||
if !ok {
|
||
return clientSessionInfo{}, false
|
||
}
|
||
r.clientInfoMu.RLock()
|
||
defer r.clientInfoMu.RUnlock()
|
||
info, ok := r.clientInfo[clientInfoSessionKey{rawAuthKeyID: rawAuthKeyID, sessionID: sessionID}]
|
||
if authInfo, authOK := r.authInfo[rawAuthKeyID]; authOK {
|
||
info = mergeClientSessionInfo(info, authInfo)
|
||
ok = true
|
||
}
|
||
if authKeyID, hasAuthKeyID := AuthKeyIDFrom(ctx); hasAuthKeyID {
|
||
if authInfo, authOK := r.authInfo[authKeyID]; authOK {
|
||
info = mergeClientSessionInfo(info, authInfo)
|
||
ok = true
|
||
}
|
||
}
|
||
return info, ok
|
||
}
|
||
|
||
func (r *Router) cachedResolvedAuthClientInfo(authKeyID [8]byte) (clientSessionInfo, bool) {
|
||
r.clientInfoMu.RLock()
|
||
defer r.clientInfoMu.RUnlock()
|
||
info, ok := r.authInfo[authKeyID]
|
||
if !ok || clientSessionInfoNeedsAuthorization(info) {
|
||
return clientSessionInfo{}, false
|
||
}
|
||
return info, true
|
||
}
|
||
|
||
func mergeClientSessionInfo(base, fallback clientSessionInfo) clientSessionInfo {
|
||
if base.layer == 0 {
|
||
base.layer = fallback.layer
|
||
}
|
||
if !base.hasClientInfo && fallback.hasClientInfo {
|
||
base.clientInfo = fallback.clientInfo
|
||
base.hasClientInfo = true
|
||
}
|
||
if fallback.authorizationChecked {
|
||
base.authorizationChecked = true
|
||
}
|
||
return base
|
||
}
|
||
|
||
func (r *Router) clientSessionInfoFromAuthorization(ctx context.Context, userID int64, authKeyID [8]byte, current clientSessionInfo) (clientSessionInfo, bool) {
|
||
if !clientSessionInfoNeedsAuthorization(current) || r.deps.Auth == nil || userID == 0 {
|
||
return clientSessionInfo{}, false
|
||
}
|
||
v, err, _ := r.authUserSF.Do(authClientInfoSingleflightPrefix+string(authKeyID[:]), func() (any, error) {
|
||
if cached, ok := r.cachedResolvedAuthClientInfo(authKeyID); ok {
|
||
return cached, nil
|
||
}
|
||
item, found, err := r.deps.Auth.Authorization(ctx, authKeyID)
|
||
if err != nil {
|
||
return clientSessionInfo{}, err
|
||
}
|
||
if !found || item.UserID != userID || item.PasswordPending {
|
||
return clientSessionInfo{authorizationChecked: true}, nil
|
||
}
|
||
return clientSessionInfoFromAuthorizationRecord(item, current), nil
|
||
})
|
||
if err != nil {
|
||
return clientSessionInfo{}, false
|
||
}
|
||
return v.(clientSessionInfo), true
|
||
}
|
||
|
||
func clientSessionInfoFromAuthorizationRecord(item domain.Authorization, current clientSessionInfo) clientSessionInfo {
|
||
info := clientSessionInfo{
|
||
layer: item.Layer,
|
||
authorizationChecked: true,
|
||
clientInfo: ClientInfo{
|
||
APIID: item.APIID,
|
||
DeviceModel: item.DeviceModel,
|
||
SystemVersion: item.SystemVersion,
|
||
AppVersion: item.AppVersion,
|
||
Type: ClientType(item.Platform),
|
||
},
|
||
}
|
||
info.clientInfo = normalizeClientInfo(info.clientInfo)
|
||
info.hasClientInfo = info.clientInfo.ClientType() != ClientTypeUnknown ||
|
||
info.clientInfo.DeviceModel != "" ||
|
||
info.clientInfo.SystemVersion != "" ||
|
||
info.clientInfo.AppVersion != "" ||
|
||
info.clientInfo.APIID != 0
|
||
if info.layer == 0 {
|
||
if current.layer != 0 {
|
||
info.layer = current.layer
|
||
} else if info.clientInfo.ClientType() != ClientTypeUnknown {
|
||
info.layer = currentClientLayer
|
||
}
|
||
}
|
||
return info
|
||
}
|
||
|
||
func clientSessionInfoNeedsAuthorization(info clientSessionInfo) bool {
|
||
if info.authorizationChecked {
|
||
return false
|
||
}
|
||
return info.layer == 0 || !info.hasClientInfo || info.clientInfo.ClientType() == ClientTypeUnknown
|
||
}
|
||
|
||
// fallback 处理未注册的 RPC：记录到 compatibility trace（落兼容矩阵），
|
||
// 返回 NOT_IMPLEMENTED rpc_error 让客户端继续运行而非断连。
|
||
func (r *Router) fallback(ctx context.Context, b *bin.Buffer) (bin.Encoder, error) {
|
||
// DrKLO 12.8.1 的 theme 方法构造器比 gotd schema 新,dispatcher 匹配不上;
|
||
// 在落到「未实现」前先按 DrKLO 字段序手动解码处理。
|
||
if enc, handled, err := r.tryLegacyThemeRPC(ctx, b); handled {
|
||
return enc, err
|
||
}
|
||
id, _ := b.PeekID()
|
||
fields := append([]zap.Field{
|
||
zap.String("method", tlTypeName(id)),
|
||
zap.String("type_id", fmt.Sprintf("%#x", id)),
|
||
}, r.contextLogFields(ctx)...)
|
||
r.log.Warn("Unhandled RPC (compatibility trace)", fields...)
|
||
return nil, notImplementedErr()
|
||
}
|
||
|
||
func (r *Router) contextLogFields(ctx context.Context) []zap.Field {
|
||
fields := []zap.Field{
|
||
zap.Int("layer", LayerFrom(ctx)),
|
||
zap.String("client_type", string(ClientTypeFrom(ctx))),
|
||
}
|
||
if info, ok := ClientInfoFrom(ctx); ok && info.AppVersion != "" {
|
||
fields = append(fields, zap.String("app_version", info.AppVersion))
|
||
}
|
||
if sessionID, ok := SessionIDFrom(ctx); ok {
|
||
fields = append(fields, zap.Int64("session_id", sessionID))
|
||
}
|
||
if rawAuthKeyID, ok := RawAuthKeyIDFrom(ctx); ok {
|
||
fields = append(fields, zap.String("raw_auth_key_id", hex.EncodeToString(rawAuthKeyID[:])))
|
||
}
|
||
if authKeyID, ok := AuthKeyIDFrom(ctx); ok {
|
||
fields = append(fields, zap.String("auth_key_id", hex.EncodeToString(authKeyID[:])))
|
||
}
|
||
if userID, ok := UserIDFrom(ctx); ok {
|
||
fields = append(fields, zap.Int64("user_id", userID))
|
||
}
|
||
return fields
|
||
}
|
||
|
||
// rawObject 在解码 wrapper 时按原样捕获内层 query 的 TL 字节，供递归分发。
|
||
// 它实现 bin.Object（Encode/Decode），但只搬运字节、不解释内容。
|
||
type rawObject struct {
|
||
data []byte
|
||
}
|
||
|
||
func (o *rawObject) Decode(b *bin.Buffer) error {
|
||
o.data = append(o.data[:0], b.Buf...)
|
||
b.Skip(len(b.Buf))
|
||
return nil
|
||
}
|
||
|
||
func (o *rawObject) Encode(b *bin.Buffer) error {
|
||
b.Put(o.data)
|
||
return nil
|
||
}
|