Flechazo
113e941bef
- add character imprint, awakening, and equipment refinement - add equipment ticket gacha and persistent progression fields - add request-scoped account transactions with crash recovery - persist age confirmation and isolate client plugin patches - separate one-off save repair tools from shipped tooling
102 lines
3.6 KiB
Go
102 lines
3.6 KiB
Go
// Package feature contains deliberately small, stateless protocol handlers.
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//
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// These endpoints were observed to return an empty protobuf for a new local
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// account. Keeping that fact here (rather than treating every unknown route
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// as successful) lets the session dispatcher remain fail-closed.
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package feature
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import (
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"errors"
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"fmt"
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"bd2server/internal/wire"
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)
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// ErrInvalidRequest means a known endpoint was sent a malformed request.
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var ErrInvalidRequest = errors.New("feature: invalid protobuf request")
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// emptyResponses is the 2.34.13 capture audit's 35 endpoint new-player batch
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// set whose successful response protobuf has zero bytes. Packet codes are
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// protocol values, not ordinals derived from the request or response order.
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var emptyResponses = map[string]int{
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"/AvatarShopWishListInfo": 470,
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"/CafeteriaInfo": 351,
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"/CashBonusInfo": 588,
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"/CharPartnerInfo": 65,
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"/CommunityRewardInfo": 289,
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"/DailyStoryInfo": 538,
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"/DatingInfo": 361,
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"/DeckCostumeSettingInfo": 397,
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"/DispatchInfo": 0,
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"/EquipPresetInfo": 253,
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"/EvilCastleDailyRewardState": 441,
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"/EvilCastleTowerInfo": 200,
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"/FieldObjectInfo": 28,
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"/FieldTrapInfo": 171,
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"/FireWorksInfo": 554,
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"/FishingCollectionInfo": 465,
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"/FishingTrapInfo": 457,
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"/FriendInfoList": 204,
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"/FriendshipInfo": 612,
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"/FriendshipSpecialEpisodeInfo": 623,
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"/GuildInitInfo": 332,
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"/IdCardPresetInfo": 450,
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"/LifeUserInfo": 594,
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"/MasterTitleInfo": 590,
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"/MiniEventHubInfo": 534,
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"/MyLikeInfo": 218,
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"/MyRoomItemInfo": 232,
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"/PersonalInfo": 199,
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"/PrestigeSkinInfo": 425,
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"/PresetInfo": 178,
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"/QuestMaxClearInfo": 137,
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"/SpineInteractionAchievementInfo": 532,
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"/TotalWarRewardState": 252,
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"/TutorialInfo": 101,
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}
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// Handle recognizes only audited, stateless empty-response endpoints. The
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// request must be a structurally valid protobuf with its normal nonzero
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// request sequence in field 1. Unknown paths return ok=false and no response.
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// proto is nil on success: protobuf's canonical empty-message encoding is zero
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// bytes.
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func Handle(path string, request []byte) (packetCode int, proto []byte, ok bool, err error) {
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packetCode, ok = emptyResponses[path]
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if !ok {
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packetCode, proto, ok = initialResponse(path)
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}
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if !ok {
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packetCode, ok = standaloneDefaults[path]
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}
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if !ok {
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packetCode, ok = commandSuccess[path]
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if !ok {
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return 0, nil, false, nil
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}
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}
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sequence, present, walkErr := wire.Varint(request, 1)
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if walkErr != nil || !present || sequence == 0 {
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if walkErr != nil {
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return 0, nil, true, fmt.Errorf("%w: %s: %v", ErrInvalidRequest, path, walkErr)
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}
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return 0, nil, true, fmt.Errorf("%w: %s has no request sequence", ErrInvalidRequest, path)
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}
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return packetCode, proto, true, nil
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}
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// Service adapts this registry to session.Handler without importing session.
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type Service struct{}
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func (Service) Handle(path string, request []byte) (int, []byte, bool, error) {
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return Handle(path, request)
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}
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// EmptyPacketCodes returns a detached copy for diagnostics and protocol tests.
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func EmptyPacketCodes() map[string]int {
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result := make(map[string]int, len(emptyResponses))
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for path, code := range emptyResponses {
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result[path] = code
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}
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return result
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}
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