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#include "Network.hpp"
#include <zlib.h>
#include <easylogging++.h>
#include "Socket.hpp"
Network::Network(std::string address, unsigned short port) {
try {
socket = std::make_unique<Socket>(address, port);
stream = std::make_unique<StreamSocket>(socket.get());
} catch (std::exception &e) {
LOG(WARNING) << "Connection failed: " << e.what();
throw;
}
}
Network::~Network() {
}
std::shared_ptr<Packet> Network::ReceivePacket(ConnectionState state, bool useCompression) {
if (useCompression) {
int packetLength = stream->ReadVarInt();
auto packetData = stream->ReadByteArray(packetLength);
StreamBuffer streamBuffer(packetData.data(), packetData.size());
int dataLength = streamBuffer.ReadVarInt();
if (dataLength == 0) {
auto packetData = streamBuffer.ReadByteArray(packetLength - streamBuffer.GetReadedLength());
StreamBuffer streamBuffer(packetData.data(), packetData.size());
int packetId = streamBuffer.ReadVarInt();
auto packet = ReceivePacketByPacketId(packetId, state, streamBuffer);
return packet;
} else {
std::vector<unsigned char> compressedData = streamBuffer.ReadByteArray(packetLength - streamBuffer.GetReadedLength());
std::vector<unsigned char> uncompressedData;
uncompressedData.resize(dataLength);
z_stream zStream;
zStream.avail_in = compressedData.size();
zStream.next_in = compressedData.data();
zStream.avail_out = uncompressedData.size();
zStream.next_out = uncompressedData.data();
zStream.zalloc = Z_NULL;
zStream.zfree = Z_NULL;
zStream.opaque = Z_NULL;
if (inflateInit(&zStream) != Z_OK)
throw std::runtime_error("Zlib decompression initalization error");
int status = inflate(&zStream, Z_FINISH);
switch (status) {
case Z_STREAM_END:
break;
case Z_OK:
case Z_STREAM_ERROR:
case Z_BUF_ERROR:
throw std::runtime_error("Zlib decompression error: " + std::to_string(status));
}
if (inflateEnd(&zStream) != Z_OK)
throw std::runtime_error("Zlib decompression end error");
StreamBuffer streamBuffer(uncompressedData.data(), uncompressedData.size());
int packetId = streamBuffer.ReadVarInt();
auto packet = ReceivePacketByPacketId(packetId, state, streamBuffer);
return packet;
}
} else {
int packetSize = stream->ReadVarInt();
auto packetData = stream->ReadByteArray(packetSize);
StreamBuffer streamBuffer(packetData.data(), packetData.size());
int packetId = streamBuffer.ReadVarInt();
auto packet = ReceivePacketByPacketId(packetId, state, streamBuffer);
return packet;
}
}
void Network::SendPacket(Packet &packet, int compressionThreshold) {
if (compressionThreshold >= 0) {
StreamCounter packetSize;
packetSize.WriteVarInt(packet.GetPacketId());
packetSize.WriteVarInt(0);
packet.ToStream(&packetSize);
if (packetSize.GetCountedSize() < compressionThreshold) {
stream->WriteVarInt(packetSize.GetCountedSize());
stream->WriteVarInt(0);
stream->WriteVarInt(packet.GetPacketId());
packet.ToStream(stream.get());
} else {
throw std::runtime_error("Compressing send data not supported");
}
}
else {
StreamCounter packetSize;
packetSize.WriteVarInt(packet.GetPacketId());
packet.ToStream(&packetSize);
stream->WriteVarInt(packetSize.GetCountedSize());
stream->WriteVarInt(packet.GetPacketId());
packet.ToStream(stream.get());
}
stream->Flush();
}
std::shared_ptr<Packet> Network::ReceivePacketByPacketId(int packetId, ConnectionState state, StreamInput &in) {
std::shared_ptr < Packet > packet(nullptr);
switch (state) {
case Handshaking:
switch (packetId) {
case PacketNameHandshakingCB::Handshake:
packet = std::make_shared<PacketHandshake>();
break;
}
break;
case Login:
switch (packetId) {
case PacketNameLoginCB::LoginSuccess:
packet = std::make_shared<PacketLoginSuccess>();
break;
case PacketNameLoginCB::SetCompression:
packet = std::make_shared<PacketSetCompression>();
break;
case PacketNameLoginCB::Disconnect:
packet = std::make_shared<PacketDisconnect>();
break;
}
break;
case Play:
packet = ParsePacketPlay((PacketNamePlayCB) packetId);
break;
case Status:
break;
}
if (packet.get() != nullptr)
packet->FromStream(&in);
return packet;
}
std::shared_ptr<Packet> Network::ParsePacketPlay(PacketNamePlayCB id) {
switch (id) {
case SpawnObject:
return std::make_shared<PacketSpawnObject>();
case SpawnExperienceOrb:
break;
case SpawnGlobalEntity:
break;
case SpawnMob:
return std::make_shared<PacketSpawnMob>();
case SpawnPainting:
break;
case SpawnPlayer:
return std::make_shared<PacketSpawnPlayer>();
case AnimationCB:
break;
case Statistics:
break;
case BlockBreakAnimation:
break;
case UpdateBlockEntity:
break;
case BlockAction:
break;
case BlockChange:
return std::make_shared<PacketBlockChange>();
case BossBar:
break;
case ServerDifficulty:
break;
case TabCompleteCB:
break;
case ChatMessageCB:
return std::make_shared<PacketChatMessageCB>();
case MultiBlockChange:
return std::make_shared<PacketMultiBlockChange>();
case ConfirmTransactionCB:
return std::make_shared<PacketConfirmTransactionCB>();
case CloseWindowCB:
return std::make_shared<PacketCloseWindowCB>();
case OpenWindow:
return std::make_shared<PacketOpenWindow>();
case WindowItems:
return std::make_shared<PacketWindowItems>();
case WindowProperty:
return std::make_shared<PacketWindowProperty>();
case SetSlot:
return std::make_shared<PacketSetSlot>();
case SetCooldown:
break;
case PluginMessageCB:
break;
case NamedSoundEffect:
break;
case DisconnectPlay:
return std::make_shared<PacketDisconnectPlay>();
case EntityStatus:
break;
case Explosion:
break;
case UnloadChunk:
return std::make_shared<PacketUnloadChunk>();
case ChangeGameState:
break;
case KeepAliveCB:
return std::make_shared<PacketKeepAliveCB>();
case ChunkData:
return std::make_shared<PacketChunkData>();
case Effect:
break;
case Particle:
break;
case JoinGame:
return std::make_shared<PacketJoinGame>();
case Map:
break;
case EntityRelativeMove:
return std::make_shared<PacketEntityRelativeMove>();
case EntityLookAndRelativeMove:
return std::make_shared<PacketEntityLookAndRelativeMove>();
case EntityLook:
return std::make_shared<PacketEntityLook>();
case EntityCB:
break;
case VehicleMove:
break;
case OpenSignEditor:
break;
case CraftRecipeResponse:
break;
case PlayerAbilitiesCB:
break;
case CombatEvent:
break;
case PlayerListItem:
break;
case PlayerPositionAndLookCB:
return std::make_shared<PacketPlayerPositionAndLookCB>();
case UseBed:
break;
case DestroyEntities:
return std::make_shared<PacketDestroyEntities>();
case RemoveEntityEffect:
break;
case ResourcePackSend:
break;
case Respawn:
return std::make_shared<PacketRespawn>();
case EntityHeadLook:
break;
case WorldBorder:
break;
case Camera:
break;
case HeldItemChangeCB:
break;
case DisplayScoreboard:
break;
case EntityMetadata:
break;
case AttachEntity:
break;
case EntityVelocity:
return std::make_shared<PacketEntityVelocity>();
case EntityEquipment:
break;
case SetExperience:
break;
case UpdateHealth:
return std::make_shared<PacketUpdateHealth>();
case ScoreboardObjective:
break;
case SetPassengers:
break;
case Teams:
break;
case UpdateScore:
break;
case SpawnPosition:
return std::make_shared<PacketSpawnPosition>();
case TimeUpdate:
return std::make_shared<PacketTimeUpdate>();
case Title:
break;
case SoundEffect:
break;
case PlayerListHeaderAndFooter:
break;
case CollectItem:
break;
case EntityTeleport:
return std::make_shared<PacketEntityTeleport>();
case EntityProperties:
break;
case EntityEffect:
break;
case UnlockRecipes:
break;
case SelectAdvancementTab:
break;
case Advancements:
break;
}
return nullptr;
}
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