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feat(ugc): answer the client's UGC manifest requests without 3D services

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With UGCUSE3DSERVICES=7:0 (the client's default) the client asks its world for
a blueprint file's MD5 and size (REQUEST_UGC_MANIFEST_INFO, world 27) and then
downloads BrickModels/UserMade/<id % 1000>/<id>.<ext>.sd0. Layouts checked in
the 1.10.64 client: the request is a u64 blueprint id and a u8 resource type;
the answer (UGC_MANIFEST_RESPONSE, client 60) repeats them and adds a u8 valid,
the u32 size and the 16 byte MD5 of the inflated file, 37 bytes after the 0x53
exactly or the client drops it.

- dNet: WorldPackets::RequestUgcManifestInfo, ClientPackets::UgcManifestResponse
  (eUgcResourceType), with byte tests against the client's layouts.
- Database: ugc_file_checksums (per model or module combination and file) and
  ugc_modular_build.combination_id (migrations 89 / 72), GetUgcFileChecksum
  looks a blueprint up as a model, else as a build through its combination.
- UGC server: every download is also written as .sd0 (Sd0::Compress); workers
  hand the checksums back and the main thread stores them; old items get their
  sd0 icon and checksum, and builds their combination id, once at start-up, a
  few per tick; serves <dir>/BrickModels/UserMade/<bucket>/<id>.<ext>.sd0 under
  client_path, /<folder>/UserBrickModels and the root (.hkx 404).
- World: UgcManifest answers on the main thread with one indexed query per
  request; files not made yet are answered when they are (looked at again
  every 5 seconds), and a model in its quiet period is made right away. No
  worker threads, HTTP or file reads in the world.

Off by default (ugc_manifest=0): checked in game, the client then downloads
from http://127.0.0.1:80/lwoclient/UserBrickModels/ whatever its boot.cfg says
and logs the player out when it can't connect, so icons need the UGC server on
port 80 of each player's machine. docs/UgcServer.md has the details.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-27 17:46:47 -05:00
parent ceec638e52
commit 79235702b3
33 changed files with 706 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
dWorldServer/WorldServer.cpp
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@@ -10,6 +10,7 @@
#include "PropertyRent.h"
#include "PropertyReputation.h"
#include "LiveEvents.h"
#include "UgcManifest.h"
#include <iostream>
#include <string>
#include <ctime>
@@ -474,6 +475,7 @@ int main(int argc, char** argv) {
DashboardNotify::SendPlayerPositions(g_InstanceID);
MessageInspector::Update();
LiveEvents::Update();
UgcManifest::Update();
Metrics::StartMeasurement(MetricVariable::UpdateSpawners);
Game::zoneManager->Update(deltaTime);
@@ -1104,6 +1106,7 @@ void CleanupDisconnectedUser(const SystemAddress& sysAddr) {
// other instance has saved since
const bool savedByMigration = WorldMigration::IsLeaving(sysAddr);
WorldMigration::OnDisconnected(sysAddr);
UgcManifest::OnDisconnect(sysAddr);
auto user = UserManager::Instance()->GetUser(sysAddr);
if (!user) return;
@@ -1604,6 +1607,13 @@ namespace {
}
};
struct RequestUgcManifestInfoPacket final : public WorldPackets::RequestUgcManifestInfo {
void Handle() override {
if (!UserManager::Instance()->GetUser(sysAddr)) return;
UgcManifest::OnRequest(sysAddr, blueprintId, resourceType);
}
};
template<typename T>
std::unique_ptr<WorldPackets::WorldLUBitStream> Create() { return std::make_unique<T>(); }
@@ -1623,6 +1633,7 @@ namespace {
{ MessageType::World::GENERAL_CHAT_MESSAGE, Create<GeneralChatMessagePacket> },
{ MessageType::World::HANDLE_FUNNESS, Create<HandleFunnessPacket> },
{ MessageType::World::UI_HELP_TOP_5, Create<UIHelpTop5Packet> },
{ MessageType::World::REQUEST_UGC_MANIFEST_INFO, Create<RequestUgcManifestInfoPacket> },
};
}