OrdinaryMagician/vkdoom_m
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vkdoom_m/src/d_net.cpp
Boondorl e981064e5c Fixed BT_RUN getting toggled off on command clear 
This doesn't get delta'd when networking so its state has to be kept between wipes since it's built entirely from client data.
2025-06-14 14:04:44 -03:00

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//-----------------------------------------------------------------------------
//
// Copyright 1993-1996 id Software
// Copyright 1999-2016 Randy Heit
// Copyright 2002-2016 Christoph Oelckers
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see http://www.gnu.org/licenses/
//
//-----------------------------------------------------------------------------
//
// DESCRIPTION:
// DOOM Network game communication and protocol,
// all OS independent parts.
//
//-----------------------------------------------------------------------------
#include <stddef.h>
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include "version.h"
#include "menu.h"
#include "i_video.h"
#include "i_net.h"
#include "g_game.h"
#include "c_console.h"
#include "d_netinf.h"
#include "d_net.h"
#include "cmdlib.h"
#include "m_cheat.h"
#include "p_local.h"
#include "c_dispatch.h"
#include "sbar.h"
#include "gi.h"
#include "m_misc.h"
#include "gameconfigfile.h"
#include "p_acs.h"
#include "p_trace.h"
#include "a_sharedglobal.h"
#include "st_start.h"
#include "teaminfo.h"
#include "p_conversation.h"
#include "d_eventbase.h"
#include "p_enemy.h"
#include "m_argv.h"
#include "p_lnspec.h"
#include "p_spec.h"
#include "hardware.h"
#include "r_utility.h"
#include "a_keys.h"
#include "intermission/intermission.h"
#include "g_levellocals.h"
#include "actorinlines.h"
#include "events.h"
#include "i_time.h"
#include "i_system.h"
#include "vm.h"
#include "gstrings.h"
#include "s_music.h"
#include "screenjob.h"
#include "d_main.h"
#include "i_interface.h"
#include "savegamemanager.h"
void P_RunClientsideLogic();
EXTERN_CVAR (Int, disableautosave)
EXTERN_CVAR (Int, autosavecount)
EXTERN_CVAR (Bool, cl_capfps)
EXTERN_CVAR (Bool, vid_vsync)
EXTERN_CVAR (Int, vid_maxfps)
extern uint8_t *demo_p; // [RH] Special "ticcmds" get recorded in demos
extern FString savedescription;
extern FString savegamefile;
extern bool AppActive;
void P_ClearLevelInterpolation();
enum ELevelStartStatus
{
LST_READY,
LST_HOST,
LST_WAITING,
};
// NETWORKING
//
// gametic is the tic about to (or currently being) run.
// ClientTic is the tick the client is currently on and building a command for.
//
// A world tick cannot be ran until CurrentSequence >= gametic for all clients.
int ClientTic = 0;
usercmd_t LocalCmds[LOCALCMDTICS] = {};
int LastSentConsistency = 0; // Last consistency we sent out. If < CurrentConsistency, send them out.
int CurrentConsistency = 0; // Last consistency we generated.
FClientNetState ClientStates[MAXPLAYERS] = {};
// If we're sending a packet to ourselves, store it here instead. This is the simplest way to execute
// playback as it means in the world running code itself all player commands are built the exact same way
// instead of having to rely on pulling from the correct local buffers. It also ensures all commands are
// executed over the net at the exact same tick.
static size_t LocalNetBufferSize = 0;
static uint8_t LocalNetBuffer[MAX_MSGLEN] = {};
static uint8_t CurrentLobbyID = 0u; // Ignore commands not from this lobby (useful when transitioning levels).
static int LastGameUpdate = 0; // Track the last time the game actually ran the world.
static uint64_t MutedClients = 0u; // Ignore messages from these clients.
static int LevelStartDebug = 0;
static int LevelStartDelay = 0; // While this is > 0, don't start generating packets yet.
static ELevelStartStatus LevelStartStatus = LST_READY; // Listen for when to actually start making tics.
static uint64_t LevelStartAck = 0u; // Used by the host to determine if everyone has loaded in.
static int FullLatencyCycle = MAXSENDTICS * 3; // Give ~3 seconds to gather latency info about clients on boot up.
static int LastLatencyUpdate = 0; // Update average latency every ~1 second.
static int EnterTic = 0;
static int LastEnterTic = 0;
static bool bCommandsReset = false; // If true, commands were recently cleared. Don't generate any more tics.
static int CommandsAhead = 0; // In packet server mode, the host will let us know if we're outpacing them.
static int SkipCommandTimer = 0; // Tracker for when to check for skipping commands. ~0.5 seconds in a row of being ahead will start skipping.
static int SkipCommandAmount = 0; // Amount of commands to skip. Try and batch skip them all at once since we won't be able to get an update until the full RTT.
void D_ProcessEvents(void);
void G_BuildTiccmd(usercmd_t *cmd);
void D_DoAdvanceDemo(void);
static void RunScript(uint8_t **stream, AActor *pawn, int snum, int argn, int always);
extern bool advancedemo;
CVAR(Bool, vid_dontdowait, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
CVAR(Bool, vid_lowerinbackground, true, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
CVAR(Bool, net_ticbalance, false, CVAR_SERVERINFO | CVAR_NOSAVE) // Currently deprecated, but may be brought back later.
CVAR(Bool, net_extratic, false, CVAR_SERVERINFO | CVAR_NOSAVE)
CVAR(Bool, net_disablepause, false, CVAR_SERVERINFO | CVAR_NOSAVE)
CVAR(Bool, net_repeatableactioncooldown, true, CVAR_SERVERINFO | CVAR_NOSAVE)
CVAR(Bool, cl_noboldchat, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CVAR(Bool, cl_nochatsound, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CUSTOM_CVAR(Int, cl_showchat, CHAT_GLOBAL, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
if (self < CHAT_DISABLED)
self = CHAT_DISABLED;
else if (self > CHAT_GLOBAL)
self = CHAT_GLOBAL;
}
CUSTOM_CVAR(Int, cl_debugprediction, 0, CVAR_CHEAT)
{
if (self < 0)
self = 0;
else if (self > BACKUPTICS - 1)
self = BACKUPTICS - 1;
}
// Used to write out all network events that occured leading up to the next tick.
static struct NetEventData
{
struct FStream {
uint8_t* Stream;
size_t Used = 0;
FStream()
{
Grow(256);
}
~FStream()
{
if (Stream != nullptr)
M_Free(Stream);
}
void Grow(size_t size)
{
Stream = (uint8_t*)M_Realloc(Stream, size);
}
} Streams[BACKUPTICS];
private:
size_t CurrentSize = 0;
size_t MaxSize = 256;
int CurrentClientTic = 0;
// Make more room for special Command.
void GetMoreBytes(size_t newSize)
{
MaxSize = max<size_t>(MaxSize * 2, newSize + 30);
DPrintf(DMSG_NOTIFY, "Expanding special size to %zu\n", MaxSize);
for (auto& stream : Streams)
Streams->Grow(MaxSize);
CurrentStream = Streams[CurrentClientTic % BACKUPTICS].Stream + CurrentSize;
}
void AddBytes(size_t bytes)
{
if (CurrentSize + bytes >= MaxSize)
GetMoreBytes(CurrentSize + bytes);
CurrentSize += bytes;
}
public:
uint8_t* CurrentStream = nullptr;
// Boot up does some faux network events so we need to wait until after
// everything is initialized to actually set up the network stream.
void InitializeEventData()
{
CurrentStream = Streams[0].Stream;
CurrentSize = 0;
}
void ResetStream()
{
CurrentClientTic = ClientTic / TicDup;
CurrentStream = Streams[CurrentClientTic % BACKUPTICS].Stream;
CurrentSize = 0;
}
void NewClientTic()
{
const int tic = ClientTic / TicDup;
if (CurrentClientTic == tic)
return;
Streams[CurrentClientTic % BACKUPTICS].Used = CurrentSize;
CurrentClientTic = tic;
CurrentStream = Streams[tic % BACKUPTICS].Stream;
CurrentSize = 0;
}
NetEventData& operator<<(uint8_t it)
{
if (CurrentStream != nullptr)
{
AddBytes(1);
WriteInt8(it, &CurrentStream);
}
return *this;
}
NetEventData& operator<<(int16_t it)
{
if (CurrentStream != nullptr)
{
AddBytes(2);
WriteInt16(it, &CurrentStream);
}
return *this;
}
NetEventData& operator<<(int32_t it)
{
if (CurrentStream != nullptr)
{
AddBytes(4);
WriteInt32(it, &CurrentStream);
}
return *this;
}
NetEventData& operator<<(int64_t it)
{
if (CurrentStream != nullptr)
{
AddBytes(8);
WriteInt64(it, &CurrentStream);
}
return *this;
}
NetEventData& operator<<(float it)
{
if (CurrentStream != nullptr)
{
AddBytes(4);
WriteFloat(it, &CurrentStream);
}
return *this;
}
NetEventData& operator<<(double it)
{
if (CurrentStream != nullptr)
{
AddBytes(8);
WriteDouble(it, &CurrentStream);
}
return *this;
}
NetEventData& operator<<(const char *it)
{
if (CurrentStream != nullptr)
{
AddBytes(strlen(it) + 1);
WriteString(it, &CurrentStream);
}
return *this;
}
} NetEvents;
void Net_ClearBuffers()
{
CloseNetwork();
for (int i = 0; i < MAXPLAYERS; ++i)
{
playeringame[i] = false;
players[i].waiting = players[i].inconsistant = false;
auto& state = ClientStates[i];
state.AverageLatency = state.CurrentLatency = 0u;
memset(state.SentTime, 0, sizeof(state.SentTime));
memset(state.RecvTime, 0, sizeof(state.RecvTime));
state.bNewLatency = true;
state.ResendID = 0u;
state.CurrentNetConsistency = state.LastVerifiedConsistency = state.ConsistencyAck = state.ResendConsistencyFrom = -1;
state.CurrentSequence = state.SequenceAck = state.ResendSequenceFrom = -1;
state.Flags = 0;
for (int j = 0; j < BACKUPTICS; ++j)
state.Tics[j].Data.SetData(nullptr, 0);
}
NetBufferLength = 0u;
RemoteClient = -1;
MaxClients = TicDup = 1u;
consoleplayer = 0;
LocalNetBufferSize = 0u;
Net_Arbitrator = 0;
MutedClients = 0u;
CurrentLobbyID = 0u;
NetworkClients.Clear();
NetMode = NET_PeerToPeer;
netgame = multiplayer = false;
LastSentConsistency = CurrentConsistency = 0;
LastEnterTic = LastGameUpdate = EnterTic;
gametic = ClientTic = 0;
SkipCommandTimer = SkipCommandAmount = CommandsAhead = 0;
NetEvents.ResetStream();
bCommandsReset = false;
LevelStartAck = 0u;
LevelStartDelay = LevelStartDebug = 0;
LevelStartStatus = LST_READY;
FullLatencyCycle = MAXSENDTICS * 3;
LastLatencyUpdate = 0;
playeringame[0] = true;
NetworkClients += 0;
}
void Net_ResetCommands(bool midTic)
{
bCommandsReset = midTic;
++CurrentLobbyID;
SkipCommandTimer = SkipCommandAmount = CommandsAhead = 0;
int tic = gametic / TicDup;
if (midTic)
{
// If we're mid ticdup cycle, make sure we immediately enter the next one after
// the current tic we're in finishes.
ClientTic = (tic + 1) * TicDup;
gametic = (tic * TicDup) + (TicDup - 1);
}
else
{
ClientTic = gametic = tic * TicDup;
--tic;
}
for (auto client : NetworkClients)
{
auto& state = ClientStates[client];
state.Flags &= CF_QUIT;
state.CurrentSequence = min<int>(state.CurrentSequence, tic);
state.SequenceAck = min<int>(state.SequenceAck, tic);
if (state.ResendSequenceFrom >= tic)
state.ResendSequenceFrom = -1;
// Make sure not to run its current command either.
auto& curTic = state.Tics[tic % BACKUPTICS];
const int running = (curTic.Command.buttons & BT_RUN); // This isn't delta'd so needs to be kept.
memset(&curTic.Command, 0, sizeof(curTic.Command));
curTic.Command.buttons |= running;
}
NetEvents.ResetStream();
}
void Net_SetWaiting()
{
if (netgame && !demoplayback && NetworkClients.Size() > 1)
LevelStartStatus = LST_WAITING;
}
// [RH] Rewritten to properly calculate the packet size
// with our variable length Command.
static size_t GetNetBufferSize()
{
if (NetBuffer[0] & NCMD_EXIT)
return 1 + (NetMode == NET_PacketServer && RemoteClient == Net_Arbitrator);
// TODO: Need a skipper for this.
if (NetBuffer[0] & NCMD_SETUP)
return NetBufferLength;
if (NetBuffer[0] & (NCMD_LATENCY | NCMD_LATENCYACK))
return 2;
if (NetBuffer[0] & NCMD_LEVELREADY)
{
int bytes = 2;
if (NetMode == NET_PacketServer && RemoteClient == Net_Arbitrator)
bytes += 2;
return bytes;
}
// Header info
int totalBytes = 10;
if (NetBuffer[0] & NCMD_QUITTERS)
totalBytes += NetBuffer[totalBytes] + 1;
const int playerCount = NetBuffer[totalBytes++];
const int numTics = NetBuffer[totalBytes++];
if (numTics > 0)
totalBytes += 4;
const int ranTics = NetBuffer[totalBytes++];
if (ranTics > 0)
totalBytes += 4;
if (NetMode == NET_PacketServer && RemoteClient == Net_Arbitrator)
++totalBytes;
// Minimum additional packet size per player:
// 1 byte for player number
// If in packet server mode and from the host, 2 bytes for the latency to the host
int padding = 1;
if (NetMode == NET_PacketServer && RemoteClient == Net_Arbitrator)
padding += 2;
if (NetBufferLength < totalBytes + playerCount * padding)
return totalBytes + playerCount * padding;
uint8_t* skipper = &NetBuffer[totalBytes];
for (int p = 0; p < playerCount; ++p)
{
++skipper;
if (NetMode == NET_PacketServer && RemoteClient == Net_Arbitrator)
skipper += 2;
for (int i = 0; i < ranTics; ++i)
skipper += 3;
for (int i = 0; i < numTics; ++i)
{
++skipper;
SkipUserCmdMessage(skipper);
}
}
return int(skipper - NetBuffer);
}
//
// HSendPacket
//
static void HSendPacket(int client, size_t size)
{
// This data already exists locally in the demo file, so don't write it out.
if (demoplayback)
return;
RemoteClient = client;
NetBufferLength = size;
if (client == consoleplayer)
{
memcpy(LocalNetBuffer, NetBuffer, size);
LocalNetBufferSize = size;
return;
}
if (!netgame)
I_Error("Tried to send a packet to a client while offline");
I_NetCmd(CMD_SEND);
}
// HGetPacket
// Returns false if no packet is waiting
static bool HGetPacket()
{
if (demoplayback)
return false;
if (LocalNetBufferSize)
{
memcpy(NetBuffer, LocalNetBuffer, LocalNetBufferSize);
NetBufferLength = LocalNetBufferSize;
RemoteClient = consoleplayer;
LocalNetBufferSize = 0u;
return true;
}
if (!netgame)
return false;
I_NetCmd(CMD_GET);
if (RemoteClient == -1)
return false;
size_t sizeCheck = GetNetBufferSize();
if (NetBufferLength != sizeCheck)
{
Printf("Incorrect packet size %d (expected %d)\n", NetBufferLength, sizeCheck);
return false;
}
return true;
}
static void ClientConnecting(int client)
{
if (consoleplayer != Net_Arbitrator)
return;
// TODO: Eventually...
}
static void DisconnectClient(int clientNum)
{
NetworkClients -= clientNum;
MutedClients &= ~((uint64_t)1u << clientNum);
I_ClearClient(clientNum);
// Capture the pawn leaving in the next world tick.
players[clientNum].playerstate = PST_GONE;
}
static void SetArbitrator(int clientNum)
{
Net_Arbitrator = clientNum;
players[Net_Arbitrator].settings_controller = true;
Printf("%s is the new host\n", players[Net_Arbitrator].userinfo.GetName());
if (NetMode == NET_PacketServer)
{
for (auto client : NetworkClients)
ClientStates[client].AverageLatency = 0u;
Net_ResetCommands(false);
Net_SetWaiting();
}
}
static void ClientQuit(int clientNum, int newHost)
{
if (!NetworkClients.InGame(clientNum))
return;
// This will get caught in the main loop and send it out to everyone as one big packet. The only
// exception is the host who will leave instantly and send out any needed data.
if (NetMode == NET_PacketServer && clientNum != Net_Arbitrator)
{
if (consoleplayer != Net_Arbitrator)
DPrintf(DMSG_WARNING, "Received disconnect packet from client %d erroneously\n", clientNum);
else
ClientStates[clientNum].Flags |= CF_QUIT;
return;
}
DisconnectClient(clientNum);
if (clientNum == Net_Arbitrator)
SetArbitrator(newHost >= 0 ? newHost : NetworkClients[0]);
if (demorecording)
G_CheckDemoStatus();
}
static bool IsMapLoaded()
{
return gamestate == GS_LEVEL;
}
static void CheckLevelStart(int client, int delayTics)
{
if (LevelStartStatus != LST_WAITING)
{
if (consoleplayer == Net_Arbitrator && client != consoleplayer)
{
// Someone might've missed the previous packet, so resend it just in case.
NetBuffer[0] = NCMD_LEVELREADY;
NetBuffer[1] = CurrentLobbyID;
if (NetMode == NET_PacketServer)
{
NetBuffer[2] = 0;
NetBuffer[3] = 0;
}
HSendPacket(client, NetMode == NET_PacketServer ? 4 : 2);
}
return;
}
if (client == Net_Arbitrator)
{
LevelStartAck = 0u;
LevelStartStatus = NetMode == NET_PacketServer && consoleplayer == Net_Arbitrator ? LST_HOST : LST_READY;
LevelStartDelay = LevelStartDebug = delayTics;
LastGameUpdate = EnterTic;
return;
}
uint64_t mask = 0u;
for (auto pNum : NetworkClients)
{
if (pNum != Net_Arbitrator)
mask |= (uint64_t)1u << pNum;
}
LevelStartAck |= (uint64_t)1u << client;
if ((LevelStartAck & mask) == mask && IsMapLoaded())
{
// Beyond this point a player is likely lagging out anyway.
constexpr uint16_t LatencyCap = 350u;
NetBuffer[0] = NCMD_LEVELREADY;
NetBuffer[1] = CurrentLobbyID;
uint16_t highestAvg = 0u;
if (NetMode == NET_PacketServer)
{
// Wait for enough latency info to be accepted so a better average
// can be calculated for everyone.
if (FullLatencyCycle > 0)
return;
for (auto client : NetworkClients)
{
if (client == Net_Arbitrator)
continue;
const uint16_t latency = min<uint16_t>(ClientStates[client].AverageLatency, LatencyCap);
if (latency > highestAvg)
highestAvg = latency;
}
}
constexpr double MS2Sec = 1.0 / 1000.0;
for (auto client : NetworkClients)
{
if (NetMode == NET_PacketServer)
{
int delay = 0;
if (client != Net_Arbitrator)
delay = int(floor((highestAvg - min<uint16_t>(ClientStates[client].AverageLatency, LatencyCap)) * MS2Sec * TICRATE));
NetBuffer[2] = (delay << 8);
NetBuffer[3] = delay;
}
HSendPacket(client, NetMode == NET_PacketServer ? 4 : 2);
}
}
}
struct FLatencyAck
{
int Client;
uint8_t Seq;
FLatencyAck(int client, uint8_t seq) : Client(client), Seq(seq) {}
};
//
// GetPackets
//
static void GetPackets()
{
TArray<FLatencyAck> latencyAcks = {};
while (HGetPacket())
{
const int clientNum = RemoteClient;
auto& clientState = ClientStates[clientNum];
if (NetBuffer[0] & NCMD_EXIT)
{
ClientQuit(clientNum, NetMode == NET_PacketServer && clientNum == Net_Arbitrator ? NetBuffer[1] : -1);
continue;
}
if (NetBuffer[0] & NCMD_SETUP)
{
HandleIncomingConnection();
continue;
}
if (NetBuffer[0] & NCMD_LATENCY)
{
size_t i = 0u;
for (; i < latencyAcks.Size(); ++i)
{
if (latencyAcks[i].Client == clientNum)
break;
}
if (i >= latencyAcks.Size())
latencyAcks.Push({ clientNum, NetBuffer[1] });
continue;
}
if (NetBuffer[0] & NCMD_LATENCYACK)
{
if (NetBuffer[1] == clientState.CurrentLatency)
{
clientState.RecvTime[clientState.CurrentLatency++ % MAXSENDTICS] = I_msTime();
clientState.bNewLatency = true;
}
continue;
}
if (NetBuffer[0] & NCMD_LEVELREADY)
{
if (NetBuffer[1] == CurrentLobbyID)
{
int delay = 0;
if (NetMode == NET_PacketServer && clientNum == Net_Arbitrator)
delay = (NetBuffer[2] << 8) | NetBuffer[3];
CheckLevelStart(clientNum, delay);
}
continue;
}
if (NetBuffer[0] & NCMD_RETRANSMIT)
{
clientState.ResendID = NetBuffer[1];
clientState.Flags |= CF_RETRANSMIT;
}
const bool validID = NetBuffer[1] == CurrentLobbyID;
if (validID)
{
clientState.Flags |= CF_UPDATED;
clientState.SequenceAck = (NetBuffer[2] << 24) | (NetBuffer[3] << 16) | (NetBuffer[4] << 8) | NetBuffer[5];
}
const int consistencyAck = (NetBuffer[6] << 24) | (NetBuffer[7] << 16) | (NetBuffer[8] << 8) | NetBuffer[9];
int curByte = 10;
if (NetBuffer[0] & NCMD_QUITTERS)
{
int numPlayers = NetBuffer[curByte++];
for (int i = 0; i < numPlayers; ++i)
DisconnectClient(NetBuffer[curByte++]);
}
const int playerCount = NetBuffer[curByte++];
int baseSequence = -1;
const int totalTics = NetBuffer[curByte++];
if (totalTics > 0)
baseSequence = (NetBuffer[curByte++] << 24) | (NetBuffer[curByte++] << 16) | (NetBuffer[curByte++] << 8) | NetBuffer[curByte++];
int baseConsistency = -1;
const int ranTics = NetBuffer[curByte++];
if (ranTics > 0)
baseConsistency = (NetBuffer[curByte++] << 24) | (NetBuffer[curByte++] << 16) | (NetBuffer[curByte++] << 8) | NetBuffer[curByte++];
if (NetMode == NET_PacketServer && clientNum == Net_Arbitrator)
{
if (validID)
CommandsAhead = NetBuffer[curByte++];
else
++curByte;
}
for (int p = 0; p < playerCount; ++p)
{
const int pNum = NetBuffer[curByte++];
auto& pState = ClientStates[pNum];
// This gets sent over per-player so latencies are correct in packet server mode.
if (NetMode == NET_PacketServer && clientNum == Net_Arbitrator)
{
if (consoleplayer != Net_Arbitrator)
pState.AverageLatency = (NetBuffer[curByte++] << 8) | NetBuffer[curByte++];
else
curByte += 2;
}
// Make sure the host doesn't update a player's last consistency ack with their own data.
if (NetMode != NET_PacketServer || consoleplayer != Net_Arbitrator
|| pNum == Net_Arbitrator || clientNum != Net_Arbitrator)
{
pState.ConsistencyAck = consistencyAck;
}
TArray<int16_t> consistencies = {};
for (int r = 0; r < ranTics; ++r)
{
int ofs = NetBuffer[curByte++];
consistencies.Insert(ofs, (NetBuffer[curByte++] << 8) | NetBuffer[curByte++]);
}
for (size_t i = 0u; i < consistencies.Size(); ++i)
{
const int cTic = baseConsistency + int(i);
if (cTic <= pState.CurrentNetConsistency)
continue;
if (cTic > pState.CurrentNetConsistency + 1 || !consistencies[i])
{
clientState.Flags |= CF_MISSING_CON;
break;
}
pState.NetConsistency[cTic % BACKUPTICS] = consistencies[i];
pState.CurrentNetConsistency = cTic;
}
// Each tic within a given packet is given a sequence number to ensure that things were put
// back together correctly. Normally this wouldn't matter as much but since we need to keep
// clients in lock step a misordered packet will instantly cause a desync.
TArray<uint8_t*> data = {};
for (int t = 0; t < totalTics; ++t)
{
// Try and reorder the tics if they're all there but end up out of order.
const int ofs = NetBuffer[curByte++];
data.Insert(ofs, &NetBuffer[curByte]);
uint8_t* skipper = &NetBuffer[curByte];
curByte += SkipUserCmdMessage(skipper);
}
// If it's from a previous waiting period, the commands are no longer relevant.
if (!validID)
continue;
for (size_t i = 0u; i < data.Size(); ++i)
{
const int seq = baseSequence + int(i);
// Duplicate command, ignore it.
if (seq <= pState.CurrentSequence)
continue;
// Skipped a command. Packet likely got corrupted while being put back together, so have
// the client send over the properly ordered commands.
if (seq > pState.CurrentSequence + 1 || data[i] == nullptr)
{
clientState.Flags |= CF_MISSING_SEQ;
break;
}
ReadUserCmdMessage(data[i], pNum, seq);
// The host and clients are a bit desynched here. We don't want to update the host's latest ack with their own
// info since they get those from the actual clients, but clients have to get them from the host since they
// don't commincate with each other except in P2P mode.
if (NetMode != NET_PacketServer || consoleplayer != Net_Arbitrator
|| pNum == Net_Arbitrator || clientNum != Net_Arbitrator)
{
pState.CurrentSequence = seq;
}
// Update this so host switching doesn't have any hiccups in packet-server mode.
if (NetMode == NET_PacketServer && consoleplayer != Net_Arbitrator && pNum != Net_Arbitrator)
pState.SequenceAck = seq;
}
}
}
for (const auto& ack : latencyAcks)
{
NetBuffer[0] = NCMD_LATENCYACK;
NetBuffer[1] = ack.Seq;
HSendPacket(ack.Client, 2);
}
}
static void SendHeartbeat()
{
// TODO: This could probably also be used to determine if there's packets
// missing and a retransmission is needed.
const uint64_t time = I_msTime();
for (auto client : NetworkClients)
{
if (client == consoleplayer)
continue;
auto& state = ClientStates[client];
if (LastLatencyUpdate >= MAXSENDTICS)
{
int delta = 0;
const uint8_t startTic = state.CurrentLatency - MAXSENDTICS;
for (int i = 0; i < MAXSENDTICS; ++i)
{
const int tic = (startTic + i) % MAXSENDTICS;
const uint64_t high = state.RecvTime[tic] < state.SentTime[tic] ? time : state.RecvTime[tic];
delta += high - state.SentTime[tic];
}
state.AverageLatency = delta / MAXSENDTICS;
}
if (state.bNewLatency)
{
// Use the most up-to-date time here for better accuracy.
state.SentTime[state.CurrentLatency % MAXSENDTICS] = I_msTime();
state.bNewLatency = false;
}
NetBuffer[0] = NCMD_LATENCY;
NetBuffer[1] = state.CurrentLatency;
HSendPacket(client, 2);
}
}
static void CheckConsistencies()
{
// Check consistencies retroactively to see if there was a desync at some point. We still
// check the local client here because in packet server mode these could realistically desync
// if the client's current position doesn't agree with the host.
for (auto client : NetworkClients)
{
auto& clientState = ClientStates[client];
// If previously inconsistent, always mark it as such going forward. We don't want this to
// accidentally go away at some point since the game state is already completely broken.
if (players[client].inconsistant)
{
clientState.LastVerifiedConsistency = clientState.CurrentNetConsistency;
}
else
{
// Make sure we don't check past tics we haven't even ran yet.
const int limit = min<int>(CurrentConsistency - 1, clientState.CurrentNetConsistency);
while (clientState.LastVerifiedConsistency < limit)
{
++clientState.LastVerifiedConsistency;
const int tic = clientState.LastVerifiedConsistency % BACKUPTICS;
if (clientState.LocalConsistency[tic] != clientState.NetConsistency[tic])
{
players[client].inconsistant = true;
clientState.LastVerifiedConsistency = clientState.CurrentNetConsistency;
break;
}
}
}
}
}
//==========================================================================
//
// FRandom :: StaticSumSeeds
//
// This function produces a uint32_t that can be used to check the consistancy
// of network games between different machines. Only a select few RNGs are
// used for the sum, because not all RNGs are important to network sync.
//
//==========================================================================
extern FRandom pr_spawnmobj;
extern FRandom pr_acs;
extern FRandom pr_chase;
extern FRandom pr_damagemobj;
static uint32_t StaticSumSeeds()
{
return
pr_spawnmobj.Seed() +
pr_acs.Seed() +
pr_chase.Seed() +
pr_damagemobj.Seed();
}
static int16_t CalculateConsistency(int client, uint32_t seed)
{
if (players[client].mo != nullptr)
{
seed += int((players[client].mo->X() + players[client].mo->Y() + players[client].mo->Z()) * 257) + players[client].mo->Angles.Yaw.BAMs() + players[client].mo->Angles.Pitch.BAMs();
seed ^= players[client].health;
}
// Zero value consistencies are seen as invalid, so always have a valid value.
return (seed & 0xFFFF) ? seed : 1;
}
// Ran a tick, so prep the next consistencies to send out.
// [RH] Include some random seeds and player stuff in the consistancy
// check, not just the player's x position like BOOM.
static void MakeConsistencies()
{
if (!netgame || demoplayback || (gametic % TicDup) || !IsMapLoaded())
return;
const uint32_t rngSum = StaticSumSeeds();
for (auto client : NetworkClients)
{
auto& clientState = ClientStates[client];
clientState.LocalConsistency[CurrentConsistency % BACKUPTICS] = CalculateConsistency(client, rngSum);
}
++CurrentConsistency;
}
static bool Net_UpdateStatus()
{
if (!netgame || demoplayback || NetworkClients.Size() <= 1)
return true;
if (LevelStartStatus == LST_WAITING || LevelStartDelay > 0)
return false;
// Check against the previous tick in case we're recovering from a huge
// system hiccup. If the game has taken too long to update, it's likely
// another client is hanging up the game.
if (LastEnterTic - LastGameUpdate >= MAXSENDTICS * TicDup)
{
// Try again in the next MaxDelay tics.
LastGameUpdate = EnterTic;
if (NetMode != NET_PacketServer || consoleplayer == Net_Arbitrator)
{
// Use a missing packet here to tell the other players to retransmit instead of simply retransmitting our
// own data over instantly. This avoids flooding the network at a time where it's not opportune to do so.
const int curTic = gametic / TicDup;
for (auto client : NetworkClients)
{
if (client == consoleplayer)
continue;
if (ClientStates[client].CurrentSequence < curTic)
{
ClientStates[client].Flags |= CF_MISSING;
players[client].waiting = true;
}
else
{
players[client].waiting = false;
}
}
}
else
{
// In packet server mode, the client is waiting for data from the host and hasn't recieved it yet. Send
// our data back over in case the host is waiting for us.
ClientStates[Net_Arbitrator].Flags |= CF_MISSING;
players[Net_Arbitrator].waiting = true;
}
}
if (LevelStartStatus == LST_HOST)
return false;
for (auto client : NetworkClients)
{
if (players[client].waiting)
return false;
}
// Wait for the game to stabilize a bit after launch before skipping commands.
bool updated = false;
int lowestDiff = INT_MAX;
if (gametic > TICRATE * 2)
{
if (NetMode != NET_PacketServer)
{
// Check if everyone has a buffer for us. If they do, we're too far ahead.
bool allUpdated = true;
int highestLatency = 0;
for (auto client : NetworkClients)
{
if (client != consoleplayer)
{
if (ClientStates[client].Flags & CF_UPDATED)
{
updated = true;
int diff = ClientStates[client].SequenceAck - ClientStates[client].CurrentSequence;
if (diff < lowestDiff)
lowestDiff = diff;
if (ClientStates[client].AverageLatency > highestLatency)
highestLatency = ClientStates[client].AverageLatency;
}
else
{
allUpdated = false;
}
}
ClientStates[client].Flags &= ~CF_UPDATED;
}
if (allUpdated)
{
// If we're consistently ahead of the highest latency player we're connected to, slow down
// as well since we should generally be in that ballpark.
const int diff = (ClientTic - gametic) / TicDup;
const int goal = static_cast<int>(ceil((double)highestLatency / TICRATE)) / TicDup + 1;
if (diff > goal)
lowestDiff = diff - goal;
}
}
else if (consoleplayer == Net_Arbitrator)
{
// If we're consistenty ahead of the highest sequence player, slow down.
bool allUpdated = true;
const int curTic = ClientTic / TicDup;
for (auto client : NetworkClients)
{
if (client != Net_Arbitrator)
{
if (ClientStates[client].Flags & CF_UPDATED)
{
updated = true;
int diff = curTic - ClientStates[client].CurrentSequence;
if (diff < lowestDiff)
lowestDiff = diff;
}
else
{
allUpdated = false;
}
}
ClientStates[client].Flags &= ~CF_UPDATED;
}
if (allUpdated)
{
// If we're consistently ahead of the world, force a stop here as well. Likely some client
// has fallen super far behind and needs to be reset.
const int diff = curTic - gametic / TicDup;
if (diff > 1)
lowestDiff = diff;
}
}
else if (ClientStates[Net_Arbitrator].Flags & CF_UPDATED)
{
// Check if the host is reporting that we're too far ahead of them.
updated = true;
lowestDiff = CommandsAhead;
ClientStates[Net_Arbitrator].Flags &= ~CF_UPDATED;
}
}
if (updated)
{
if (lowestDiff > 0)
{
if (SkipCommandTimer++ > TICRATE / 2)
{
SkipCommandTimer = 0;
if (SkipCommandAmount <= 0)
SkipCommandAmount = lowestDiff * TicDup;
}
}
else
{
SkipCommandTimer = 0;
}
}
return true;
}
void NetUpdate(int tics)
{
GetPackets();
if (tics <= 0)
return;
if (netgame && !demoplayback)
{
// If a tic has passed, always send out a heartbeat packet (also doubles as
// a latency measurement tool).
if (NetMode != NET_PacketServer || consoleplayer == Net_Arbitrator)
{
LastLatencyUpdate += tics;
if (FullLatencyCycle > 0)
FullLatencyCycle = max<int>(FullLatencyCycle - tics, 0);
SendHeartbeat();
if (LastLatencyUpdate >= MAXSENDTICS)
LastLatencyUpdate = 0;
}
CheckConsistencies();
}
// Sit idle after the level has loaded until everyone is ready to go. This keeps players better
// in sync with each other than relying on tic balancing to speed up/slow down the game and mirrors
// how players would wait for a true server to load.
if (LevelStartStatus != LST_READY)
{
if (LevelStartStatus == LST_WAITING)
{
if (NetworkClients.Size() == 1)
{
// If we got stuck in limbo waiting, force start the map.
CheckLevelStart(Net_Arbitrator, 0);
}
else
{
if (consoleplayer != Net_Arbitrator && IsMapLoaded())
{
NetBuffer[0] = NCMD_LEVELREADY;
NetBuffer[1] = CurrentLobbyID;
HSendPacket(Net_Arbitrator, 2);
}
}
}
else if (LevelStartStatus == LST_HOST)
{
// If we're the host, idly wait until all packets have arrived. There's no point in predicting since we
// know for a fact the game won't be started until everyone is accounted for. (Packet server only)
const int curTic = gametic / TicDup;
int lowestSeq = curTic;
for (auto client : NetworkClients)
{
if (client != Net_Arbitrator && ClientStates[client].CurrentSequence < lowestSeq)
lowestSeq = ClientStates[client].CurrentSequence;
}
if (lowestSeq >= curTic)
LevelStartStatus = LST_READY;
}
}
else if (LevelStartDelay > 0)
{
if (LevelStartDelay < tics)
tics -= LevelStartDelay;
LevelStartDelay = max<int>(LevelStartDelay - tics, 0);
}
const bool netGood = Net_UpdateStatus();
const int startTic = ClientTic;
tics = min<int>(tics, MAXSENDTICS * TicDup);
for (int i = 0; i < tics; ++i)
{
I_StartTic();
D_ProcessEvents();
if (pauseext || !netGood)
break;
if (SkipCommandAmount > 0)
{
--SkipCommandAmount;
continue;
}
G_BuildTiccmd(&LocalCmds[ClientTic++ % LOCALCMDTICS]);
if (TicDup == 1)
{
Net_NewClientTic();
}
else
{
const int ticDiff = ClientTic % TicDup;
if (ticDiff)
{
const int startTic = ClientTic - ticDiff;
// Even if we're not sending out inputs, update the local commands so that the TicDup
// is correctly played back while predicting as best as possible. This will help prevent
// minor hitches when playing online.
for (int j = ClientTic - 1; j > startTic; --j)
LocalCmds[(j - 1) % LOCALCMDTICS].buttons |= LocalCmds[j % LOCALCMDTICS].buttons;
}
else
{
// Gather up the Command across the last TicDup number of tics
// and average them out. These are propagated back to the local
// command so that they'll be predicted correctly.
const int lastTic = ClientTic - TicDup;
for (int j = ClientTic - 1; j > lastTic; --j)
LocalCmds[(j - 1) % LOCALCMDTICS].buttons |= LocalCmds[j % LOCALCMDTICS].buttons;
int pitch = 0;
int yaw = 0;
int roll = 0;
int forwardmove = 0;
int sidemove = 0;
int upmove = 0;
for (int j = 0; j < TicDup; ++j)
{
const int mod = (lastTic + j) % LOCALCMDTICS;
pitch += LocalCmds[mod].pitch;
yaw += LocalCmds[mod].yaw;
roll += LocalCmds[mod].roll;
forwardmove += LocalCmds[mod].forwardmove;
sidemove += LocalCmds[mod].sidemove;
upmove += LocalCmds[mod].upmove;
}
pitch /= TicDup;
yaw /= TicDup;
roll /= TicDup;
forwardmove /= TicDup;
sidemove /= TicDup;
upmove /= TicDup;
for (int j = 0; j < TicDup; ++j)
{
const int mod = (lastTic + j) % LOCALCMDTICS;
LocalCmds[mod].pitch = pitch;
LocalCmds[mod].yaw = yaw;
LocalCmds[mod].roll = roll;
LocalCmds[mod].forwardmove = forwardmove;
LocalCmds[mod].sidemove = sidemove;
LocalCmds[mod].upmove = upmove;
}
Net_NewClientTic();
}
}
}
const int newestTic = ClientTic / TicDup;
if (demoplayback)
{
// Don't touch net command data while playing a demo, as it'll already exist.
for (auto client : NetworkClients)
ClientStates[client].CurrentSequence = newestTic;
return;
}
constexpr int MaxPlayersPerPacket = 16;
int startSequence = startTic / TicDup;
int endSequence = newestTic;
int quitters = 0;
int quitNums[MAXPLAYERS];
int players = 1u;
int maxCommands = MAXSENDTICS;
if (NetMode == NET_PacketServer && consoleplayer == Net_Arbitrator)
{
// In packet server mode special handling is used to ensure the host only
// sends out available tics when ready instead of constantly shotgunning
// them out as they're made locally.
startSequence = gametic / TicDup;
int lowestSeq = endSequence - 1;
for (auto client : NetworkClients)
{
if (client == Net_Arbitrator)
continue;
// The host has special handling when disconnecting in a packet server game.
if (ClientStates[client].Flags & CF_QUIT)
{
quitNums[quitters++] = client;
}
else
{
++players;
if (ClientStates[client].CurrentSequence < lowestSeq)
lowestSeq = ClientStates[client].CurrentSequence;
}
}
endSequence = lowestSeq + 1;
// To avoid fragmenting, split up commands into groups of 16p with only 2 commands per packet.
// If the average packet size with 16p is ~500b, this gives up to ~1000b per packet of data
// with some leeway for network events and UDP header data. Most routers have an MTU of 1500b.
// If player count is < 16, scale the number of commands by 1 per every 4 less players.
// If player count is < 8, scale the number of commands by 1 per every 1 less player.
// If player count is < 4, scale the number of commands by 4 per every 1 less player.
constexpr size_t MaxTicsPerPacket = 2u;
if (players > 1u)
{
maxCommands = MaxTicsPerPacket;
if (players >= MaxPlayersPerPacket / 2 && players < MaxPlayersPerPacket)
maxCommands = MaxTicsPerPacket + (MaxPlayersPerPacket - players) / 4;
else if (players >= MaxPlayersPerPacket / 4 && players < MaxPlayersPerPacket / 2)
maxCommands = MaxPlayersPerPacket / 4 + MaxPlayersPerPacket / 2 - players;
else if (players < MaxPlayersPerPacket / 4)
maxCommands = MaxPlayersPerPacket / 2 + (MaxPlayersPerPacket / 4 - players) * 4;
}
}
const bool resendOnly = startSequence == endSequence && (ClientTic % TicDup);
const int playerLoops = static_cast<int>(ceil((double)players / MaxPlayersPerPacket));
for (auto client : NetworkClients)
{
// If in packet server mode, we don't want to send information to anyone but the host. On the other
// hand, if we're the host we send out everyone's info to everyone else.
if (NetMode == NET_PacketServer && consoleplayer != Net_Arbitrator && client != Net_Arbitrator)
continue;
auto& curState = ClientStates[client];
// If we can only resend, don't send clients any information that they already have. If
// we couldn't generate any commands because we're at the cap, instead send out a heartbeat.
if ((curState.Flags & CF_QUIT) || (resendOnly && !(curState.Flags & (CF_RETRANSMIT | CF_MISSING))))
continue;
const bool isSelf = client == consoleplayer;
NetBuffer[0] = (curState.Flags & CF_MISSING) ? NCMD_RETRANSMIT : 0;
curState.Flags &= ~CF_MISSING;
NetBuffer[1] = (curState.Flags & CF_RETRANSMIT_SEQ) ? curState.ResendID : CurrentLobbyID;
int lastSeq = curState.CurrentSequence;
int lastCon = curState.CurrentNetConsistency;
if (NetMode == NET_PacketServer && consoleplayer != Net_Arbitrator)
{
// If in packet-server mode, make sure to get the lowest sequence of all players
// since the host themselves might have gotten updated but someone else in the packet
// did not. That way the host knows to send over the correct tic.
for (auto cl : NetworkClients)
{
if (ClientStates[cl].CurrentSequence < lastSeq)
lastSeq = ClientStates[cl].CurrentSequence;
if (ClientStates[cl].CurrentNetConsistency < lastCon)
lastCon = ClientStates[cl].CurrentNetConsistency;
}
}
// Last sequence we got from this client.
NetBuffer[2] = (lastSeq >> 24);
NetBuffer[3] = (lastSeq >> 16);
NetBuffer[4] = (lastSeq >> 8);
NetBuffer[5] = lastSeq;
// Last consistency we got from this client.
NetBuffer[6] = (lastCon >> 24);
NetBuffer[7] = (lastCon >> 16);
NetBuffer[8] = (lastCon >> 8);
NetBuffer[9] = lastCon;
if (curState.Flags & CF_RETRANSMIT_SEQ)
{
curState.Flags &= ~CF_RETRANSMIT_SEQ;
if (curState.ResendSequenceFrom < 0)
curState.ResendSequenceFrom = curState.SequenceAck + 1;
}
const int sequenceNum = curState.ResendSequenceFrom >= 0 ? curState.ResendSequenceFrom : startSequence;
const int numTics = clamp<int>(endSequence - sequenceNum, 0, MAXSENDTICS);
if (curState.Flags & CF_RETRANSMIT_CON)
{
curState.Flags &= ~CF_RETRANSMIT_CON;
if (curState.ResendConsistencyFrom < 0)
curState.ResendConsistencyFrom = curState.ConsistencyAck + 1;
}
const int baseConsistency = curState.ResendConsistencyFrom >= 0 ? curState.ResendConsistencyFrom : LastSentConsistency;
// Don't bother sending over consistencies in packet server unless you're the host.
int ran = 0;
if (NetMode != NET_PacketServer || consoleplayer == Net_Arbitrator)
ran = clamp<int>(CurrentConsistency - baseConsistency, 0, MAXSENDTICS);
int ticLoops = static_cast<int>(ceil(max<double>(numTics, ran) / maxCommands));
if (isSelf || !ticLoops)
ticLoops = 1;
const int maxPlayerLoops = isSelf ? 1 : playerLoops;
int totalQuits = quitters;
for (int tLoops = 0, curTicOfs = 0; tLoops < ticLoops; ++tLoops, curTicOfs += maxCommands)
{
for (int pLoops = 0, curPlayerOfs = 0; pLoops < maxPlayerLoops; ++pLoops, curPlayerOfs += MaxPlayersPerPacket)
{
size_t size = 10;
if (totalQuits > 0)
{
NetBuffer[0] |= NCMD_QUITTERS;
NetBuffer[size++] = totalQuits;
for (int i = 0; i < totalQuits; ++i)
NetBuffer[size++] = quitNums[i];
totalQuits = 0;
}
else
{
NetBuffer[0] &= ~NCMD_QUITTERS;
}
int playerNums[MAXPLAYERS];
int playerCount = isSelf ? players : min<int>(players - curPlayerOfs, MaxPlayersPerPacket);
NetBuffer[size++] = playerCount;
if (players > 1)
{
int i = 0;
for (auto cl : NetworkClients)
{
if (ClientStates[cl].Flags & CF_QUIT)
continue;
if (i >= curPlayerOfs)
playerNums[i - curPlayerOfs] = cl;
++i;
if (!isSelf && i >= curPlayerOfs + MaxPlayersPerPacket)
break;
}
}
else
{
playerNums[0] = consoleplayer;
}
int sendTics = isSelf ? numTics : clamp<int>(numTics - curTicOfs, 0, maxCommands);
if (curState.ResendSequenceFrom >= 0)
{
curState.ResendSequenceFrom += sendTics;
if (curState.ResendSequenceFrom >= endSequence)
curState.ResendSequenceFrom = -1;
}
NetBuffer[size++] = sendTics;
if (sendTics > 0)
{
NetBuffer[size++] = (sequenceNum + curTicOfs) >> 24;
NetBuffer[size++] = (sequenceNum + curTicOfs) >> 16;
NetBuffer[size++] = (sequenceNum + curTicOfs) >> 8;
NetBuffer[size++] = sequenceNum + curTicOfs;
}
int sendCon = isSelf ? ran : clamp<int>(ran - curTicOfs, 0, maxCommands);
if (curState.ResendConsistencyFrom >= 0)
{
curState.ResendConsistencyFrom += sendCon;
if (curState.ResendConsistencyFrom >= CurrentConsistency)
curState.ResendConsistencyFrom = -1;
}
NetBuffer[size++] = sendCon;
if (sendCon > 0)
{
NetBuffer[size++] = (baseConsistency + curTicOfs) >> 24;
NetBuffer[size++] = (baseConsistency + curTicOfs) >> 16;
NetBuffer[size++] = (baseConsistency + curTicOfs) >> 8;
NetBuffer[size++] = baseConsistency + curTicOfs;
}
if (NetMode == NET_PacketServer && consoleplayer == Net_Arbitrator)
NetBuffer[size++] = client == Net_Arbitrator ? 0 : max<int>(curState.CurrentSequence - newestTic, 0);
// Client commands.
uint8_t* cmd = &NetBuffer[size];
for (int i = 0; i < playerCount; ++i)
{
cmd[0] = playerNums[i];
++cmd;
auto& clientState = ClientStates[playerNums[i]];
// Time used to track latency since in packet server mode we want each
// client's latency to the server itself.
if (NetMode == NET_PacketServer && consoleplayer == Net_Arbitrator)
{
cmd[0] = (clientState.AverageLatency >> 8);
++cmd;
cmd[0] = clientState.AverageLatency;
++cmd;
}
for (int r = 0; r < sendCon; ++r)
{
cmd[0] = r;
++cmd;
const int tic = (baseConsistency + curTicOfs + r) % BACKUPTICS;
cmd[0] = (clientState.LocalConsistency[tic] >> 8);
++cmd;
cmd[0] = clientState.LocalConsistency[tic];
++cmd;
}
for (int t = 0; t < sendTics; ++t)
{
cmd[0] = t;
++cmd;
int curTic = sequenceNum + curTicOfs + t, lastTic = curTic - 1;
if (playerNums[i] == consoleplayer)
{
int realTic = (curTic * TicDup) % LOCALCMDTICS;
int realLastTic = (lastTic * TicDup) % LOCALCMDTICS;
// Write out the net events before the user commands so inputs can
// be used as a marker for when the given command ends.
auto& stream = NetEvents.Streams[curTic % BACKUPTICS];
if (stream.Used)
{
memcpy(cmd, stream.Stream, stream.Used);
cmd += stream.Used;
}
WriteUserCmdMessage(LocalCmds[realTic],
realLastTic >= 0 ? &LocalCmds[realLastTic] : nullptr, cmd);
}
else
{
auto& netTic = clientState.Tics[curTic % BACKUPTICS];
int len;
uint8_t* data = netTic.Data.GetData(&len);
if (data != nullptr)
{
memcpy(cmd, data, len);
cmd += len;
}
WriteUserCmdMessage(netTic.Command,
lastTic >= 0 ? &clientState.Tics[lastTic % BACKUPTICS].Command : nullptr, cmd);
}
}
}
HSendPacket(client, int(cmd - NetBuffer));
if (net_extratic && !isSelf)
HSendPacket(client, int(cmd - NetBuffer));
}
}
}
// Update this now that all the packets have been sent out.
if (!resendOnly)
LastSentConsistency = CurrentConsistency;
// Listen for other packets. This has to also come after sending so the player that sent
// data to themselves gets it immediately (important for singleplayer, otherwise there
// would always be a one-tic delay).
GetPackets();
}
// These have to be here since they have game-specific data. Only the data
// from the frontend should be put in these, all backend handling should be
// done in the core files.
void Net_SetupUserInfo()
{
D_SetupUserInfo();
}
const char* Net_GetClientName(int client, unsigned int charLimit = 0u)
{
return players[client].userinfo.GetName(charLimit);
}
size_t Net_SetUserInfo(int client, uint8_t*& stream)
{
auto str = D_GetUserInfoStrings(client, true);
const size_t userSize = str.Len() + 1;
memcpy(stream, str.GetChars(), userSize);
return userSize;
}
size_t Net_ReadUserInfo(int client, uint8_t*& stream)
{
const uint8_t* start = stream;
D_ReadUserInfoStrings(client, &stream, false);
return stream - start;
}
size_t Net_SetGameInfo(uint8_t*& stream)
{
const uint8_t* start = stream;
WriteString(startmap.GetChars(), &stream);
WriteInt32(rngseed, &stream);
C_WriteCVars(&stream, CVAR_SERVERINFO, true);
return stream - start;
}
size_t Net_ReadGameInfo(uint8_t*& stream)
{
const uint8_t* start = stream;
startmap = ReadStringConst(&stream);
rngseed = ReadInt32(&stream);
C_ReadCVars(&stream);
return stream - start;
}
// Connects players to each other if needed.
bool D_CheckNetGame()
{
if (!I_InitNetwork())
return false;
if (Args->CheckParm("-extratic"))
net_extratic = true;
players[Net_Arbitrator].settings_controller = true;
for (auto client : NetworkClients)
playeringame[client] = true;
if (MaxClients > 1u)
{
if (consoleplayer == Net_Arbitrator)
Printf("Selected " TEXTCOLOR_BLUE "%s" TEXTCOLOR_NORMAL " networking mode\n", NetMode == NET_PeerToPeer ? "peer to peer" : "packet server");
else
Printf("Host selected " TEXTCOLOR_BLUE "%s" TEXTCOLOR_NORMAL " networking mode\n", NetMode == NET_PeerToPeer ? "peer to peer" : "packet server");
Printf("Player %d of %d\n", consoleplayer + 1, MaxClients);
}
return true;
}
//
// D_QuitNetGame
// Called before quitting to leave a net game
// without hanging the other players
//
void D_QuitNetGame()
{
if (!netgame || !usergame || consoleplayer == -1 || demoplayback || NetworkClients.Size() == 1)
return;
// Send a bunch of packets for stability.
NetBuffer[0] = NCMD_EXIT;
if (NetMode == NET_PacketServer && consoleplayer == Net_Arbitrator)
{
// This currently isn't much different from the regular P2P code, but it's being split off into its
// own branch should proper host migration be added in the future (i.e. sending over stored event
// data rather than just dropping it entirely).
int nextHost = 0;
for (auto client : NetworkClients)
{
if (client != Net_Arbitrator)
{
nextHost = client;
break;
}
}
NetBuffer[1] = nextHost;
for (int i = 0; i < 4; ++i)
{
for (auto client : NetworkClients)
{
if (client != Net_Arbitrator)
HSendPacket(client, 2);
}
I_WaitVBL(1);
}
}
else
{
for (int i = 0; i < 4; ++i)
{
// If in packet server mode, only the host should know about this
// information.
if (NetMode == NET_PacketServer)
{
HSendPacket(Net_Arbitrator, 1);
}
else
{
for (auto client : NetworkClients)
{
if (client != consoleplayer)
HSendPacket(client, 1);
}
}
I_WaitVBL(1);
}
}
}
ADD_STAT(network)
{
FString out = {};
if (!netgame || demoplayback)
{
out.AppendFormat("No network stats available.");
return out;
}
out.AppendFormat("Max players: %d\tNet mode: %s\tTic dup: %d",
MaxClients,
NetMode == NET_PacketServer ? "Packet server" : "Peer to peer",
TicDup);
if (net_extratic)
out.AppendFormat("\tExtra tic enabled");
out.AppendFormat("\nWorld tic: %06d (sequence %06d)", gametic, gametic / TicDup);
if (NetMode == NET_PacketServer && consoleplayer != Net_Arbitrator)
out.AppendFormat("\tStart tics delay: %d", LevelStartDebug);
const int delay = max<int>((ClientTic - gametic) / TicDup, 0);
const int msDelay = min<int>(delay * TicDup * 1000.0 / TICRATE, 999);
out.AppendFormat("\nLocal\n\tIs arbitrator: %d\tDelay: %02d (%03dms)",
consoleplayer == Net_Arbitrator,
delay, msDelay);
if (NetMode == NET_PacketServer && consoleplayer != Net_Arbitrator)
out.AppendFormat("\tAvg latency: %03ums", min<unsigned int>(ClientStates[consoleplayer].AverageLatency, 999u));
if (LevelStartStatus != LST_READY)
{
if (LevelStartStatus == LST_HOST)
out.AppendFormat("\tWaiting for packets");
else if (consoleplayer == Net_Arbitrator)
out.AppendFormat("\tWaiting for acks");
else
out.AppendFormat("\tWaiting for arbitrator");
}
int lowestSeq = ClientTic / TicDup;
for (auto client : NetworkClients)
{
if (client == consoleplayer)
continue;
auto& state = ClientStates[client];
if (state.CurrentSequence < lowestSeq)
lowestSeq = state.CurrentSequence;
out.AppendFormat("\n%s", players[client].userinfo.GetName(12));
if (client == Net_Arbitrator)
out.AppendFormat("\t(Host)");
if ((state.Flags & CF_RETRANSMIT) == CF_RETRANSMIT)
out.AppendFormat("\t(RT)");
else if (state.Flags & CF_RETRANSMIT_SEQ)
out.AppendFormat("\t(RT SEQ)");
else if (state.Flags & CF_RETRANSMIT_CON)
out.AppendFormat("\t(RT CON)");
if ((state.Flags & CF_MISSING) == CF_MISSING)
out.AppendFormat("\t(MISS)");
else if (state.Flags & CF_MISSING_SEQ)
out.AppendFormat("\t(MISS SEQ)");
else if (state.Flags & CF_MISSING_CON)
out.AppendFormat("\t(MISS CON)");
out.AppendFormat("\n");
if (NetMode != NET_PacketServer)
{
const int cDelay = max<int>(state.CurrentSequence - (gametic / TicDup), 0);
const int mscDelay = min<int>(cDelay * TicDup * 1000.0 / TICRATE, 999);
out.AppendFormat("\tDelay: %02d (%03dms)", cDelay, mscDelay);
}
out.AppendFormat("\tAck: %06d\tConsistency: %06d", state.SequenceAck, state.ConsistencyAck);
if (NetMode != NET_PacketServer || client != Net_Arbitrator)
out.AppendFormat("\tAvg latency: %03ums", min<unsigned int>(state.AverageLatency, 999u));
}
if (NetMode != NET_PacketServer || consoleplayer == Net_Arbitrator)
out.AppendFormat("\nAvailable tics: %03d", max<int>(lowestSeq - (gametic / TicDup), 0));
return out;
}
// Forces playsim processing time to be consistent across frames.
// This improves interpolation for frames in between tics.
//
// With this cvar off the mods with a high playsim processing time will appear
// less smooth as the measured time used for interpolation will vary.
CVAR(Bool, r_ticstability, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
static uint64_t stabilityticduration = 0;
static uint64_t stabilitystarttime = 0;
static void TicStabilityWait()
{
using namespace std::chrono;
using namespace std::this_thread;
if (!r_ticstability)
return;
uint64_t start = duration_cast<microseconds>(steady_clock::now().time_since_epoch()).count();
while (true)
{
uint64_t cur = duration_cast<microseconds>(steady_clock::now().time_since_epoch()).count();
if (cur - start > stabilityticduration)
break;
}
}
static void TicStabilityBegin()
{
using namespace std::chrono;
stabilitystarttime = duration_cast<microseconds>(steady_clock::now().time_since_epoch()).count();
}
static void TicStabilityEnd()
{
using namespace std::chrono;
uint64_t stabilityendtime = duration_cast<microseconds>(steady_clock::now().time_since_epoch()).count();
stabilityticduration = min(stabilityendtime - stabilitystarttime, (uint64_t)1'000'000);
}
// Don't stabilize tics that are going to have incredibly long pauses in them.
static bool ShouldStabilizeTick()
{
return gameaction != ga_recordgame && gameaction != ga_newgame && gameaction != ga_newgame2
&& gameaction != ga_loadgame && gameaction != ga_loadgamehidecon && gameaction != ga_autoloadgame && gameaction != ga_loadgameplaydemo
&& gameaction != ga_savegame && gameaction != ga_autosave
&& gameaction != ga_worlddone && gameaction != ga_completed && gameaction != ga_screenshot && gameaction != ga_fullconsole;
}
//
// TryRunTics
//
void TryRunTics()
{
GC::CheckGC();
if (ToggleFullscreen)
{
ToggleFullscreen = false;
AddCommandString("toggle vid_fullscreen");
}
bool doWait = (cl_capfps || pauseext || (!netgame && r_NoInterpolate && !M_IsAnimated()));
if (vid_dontdowait && (vid_maxfps > 0 || vid_vsync))
doWait = false;
if (!netgame && !AppActive && vid_lowerinbackground)
doWait = true;
// Get the full number of tics the client can run.
if (doWait)
EnterTic = I_WaitForTic(LastEnterTic);
else
EnterTic = I_GetTime();
const int startCommand = ClientTic;
int totalTics = EnterTic - LastEnterTic;
if (totalTics > 1 && singletics)
totalTics = 1;
// Listen for other clients and send out data as needed. This is also
// needed for singleplayer! But is instead handled entirely through local
// buffers. This has a limit of 17 tics that can be generated.
NetUpdate(totalTics);
LastEnterTic = EnterTic;
// If the game is paused, everything we need to update has already done so.
if (pauseext)
return;
// Get the amount of tics the client can actually run. This accounts for waiting for other
// players over the network.
int lowestSequence = INT_MAX;
for (auto client : NetworkClients)
{
if (ClientStates[client].CurrentSequence < lowestSequence)
lowestSequence = ClientStates[client].CurrentSequence;
}
// If the lowest confirmed tic matches the server gametic or greater, allow the client
// to run some of them.
const int availableTics = (lowestSequence - gametic / TicDup) + 1;
// If the amount of tics to run is falling behind the amount of available tics,
// speed the playsim up a bit to help catch up.
int runTics = min<int>(totalTics, availableTics);
if (totalTics > 0 && totalTics < availableTics - 1 && !singletics)
++runTics;
// Test player prediction code in singleplayer
// by running the gametic behind the ClientTic
if (!netgame && !demoplayback && cl_debugprediction > 0)
{
int debugTarget = ClientTic - cl_debugprediction;
int debugOffset = gametic - debugTarget;
if (debugOffset > 0)
{
runTics = max<int>(runTics - debugOffset, 0);
}
}
// If there are no tics to run, check for possible stall conditions and new
// commands to predict.
if (runTics <= 0)
{
// If we're in between a tic, try and balance things out.
if (totalTics <= 0)
TicStabilityWait();
else
P_ClearLevelInterpolation();
// If we actually advanced a command, update the player's position (even if a
// tic passes this isn't guaranteed to happen since it's capped to 35 in advance).
if (ClientTic > startCommand)
{
P_UnPredictPlayer();
P_PredictPlayer(&players[consoleplayer]);
S_UpdateSounds(players[consoleplayer].camera); // Update sounds only after predicting the client's newest position.
}
// If we actually did have some tics available, make sure the UI
// still has a chance to run.
for (int i = 0; i < totalTics; ++i)
P_RunClientsideLogic();
return;
}
for (auto client : NetworkClients)
players[client].waiting = false;
// Update the last time the game tic'd.
LastGameUpdate = EnterTic;
// Run the available tics.
P_UnPredictPlayer();
while (runTics--)
{
const bool stabilize = ShouldStabilizeTick();
if (stabilize)
TicStabilityBegin();
if (advancedemo)
D_DoAdvanceDemo();
G_Ticker();
MakeConsistencies();
++gametic;
if (stabilize)
TicStabilityEnd();
if (bCommandsReset)
{
bCommandsReset = false;
break;
}
}
P_PredictPlayer(&players[consoleplayer]);
S_UpdateSounds(players[consoleplayer].camera); // Update sounds only after predicting the client's newest position.
// These should use the actual tics since they're not actually tied to the gameplay logic.
// Make sure it always comes after so the HUD has the correct game state when updating.
for (int i = 0; i < totalTics; ++i)
P_RunClientsideLogic();
}
void Net_NewClientTic()
{
NetEvents.NewClientTic();
}
void Net_Initialize()
{
NetEvents.InitializeEventData();
}
void Net_WriteInt8(uint8_t it)
{
NetEvents << it;
}
void Net_WriteInt16(int16_t it)
{
NetEvents << it;
}
void Net_WriteInt32(int32_t it)
{
NetEvents << it;
}
void Net_WriteInt64(int64_t it)
{
NetEvents << it;
}
void Net_WriteFloat(float it)
{
NetEvents << it;
}
void Net_WriteDouble(double it)
{
NetEvents << it;
}
void Net_WriteString(const char *it)
{
NetEvents << it;
}
void Net_WriteBytes(const uint8_t *block, int len)
{
while (len--)
NetEvents << *block++;
}
//==========================================================================
//
// Dynamic buffer interface
//
//==========================================================================
FDynamicBuffer::FDynamicBuffer()
{
m_Data = nullptr;
m_Len = m_BufferLen = 0;
}
FDynamicBuffer::~FDynamicBuffer()
{
if (m_Data != nullptr)
{
M_Free(m_Data);
m_Data = nullptr;
}
m_Len = m_BufferLen = 0;
}
void FDynamicBuffer::SetData(const uint8_t *data, int len)
{
if (len > m_BufferLen)
{
m_BufferLen = (len + 255) & ~255;
m_Data = (uint8_t *)M_Realloc(m_Data, m_BufferLen);
}
if (data != nullptr)
{
m_Len = len;
memcpy(m_Data, data, len);
}
else
{
m_Len = 0;
}
}
uint8_t *FDynamicBuffer::GetData(int *len)
{
if (len != nullptr)
*len = m_Len;
return m_Len ? m_Data : nullptr;
}
static int RemoveClass(FLevelLocals *Level, const PClass *cls)
{
AActor *actor;
int removecount = 0;
bool player = false;
auto iterator = Level->GetThinkerIterator<AActor>(cls->TypeName);
while ((actor = iterator.Next()))
{
if (actor->IsA(cls))
{
// [MC]Do not remove LIVE players.
if (actor->player != nullptr)
{
player = true;
continue;
}
// [SP] Don't remove owned inventory objects.
if (!actor->IsMapActor())
continue;
removecount++;
actor->ClearCounters();
actor->Destroy();
}
}
if (player)
Printf("Cannot remove live players!\n");
return removecount;
}
// [RH] Execute a special "ticcmd". The type byte should
// have already been read, and the stream is positioned
// at the beginning of the command's actual data.
void Net_DoCommand(int cmd, uint8_t **stream, int player)
{
uint8_t pos = 0;
const char* s = nullptr;
int i = 0;
switch (cmd)
{
case DEM_SAY:
{
const char *name = players[player].userinfo.GetName();
uint8_t who = ReadInt8(stream);
s = ReadStringConst(stream);
// If chat is disabled, there's nothing else to do here since the stream has been advanced.
if (cl_showchat == CHAT_DISABLED || (MutedClients & ((uint64_t)1u << player)))
break;
constexpr int MSG_TEAM = 1;
constexpr int MSG_BOLD = 2;
if (!(who & MSG_TEAM))
{
if (cl_showchat < CHAT_GLOBAL)
break;
// Said to everyone
if (deathmatch && teamplay)
Printf(PRINT_CHAT, "(All) ");
if ((who & MSG_BOLD) && !cl_noboldchat)
Printf(PRINT_CHAT, TEXTCOLOR_BOLD "* %s" TEXTCOLOR_BOLD "%s" TEXTCOLOR_BOLD "\n", name, s);
else
Printf(PRINT_CHAT, "%s" TEXTCOLOR_CHAT ": %s" TEXTCOLOR_CHAT "\n", name, s);
if (!cl_nochatsound)
S_Sound(CHAN_VOICE, CHANF_UI, gameinfo.chatSound, 1.0f, ATTN_NONE);
}
else if (!deathmatch || players[player].userinfo.GetTeam() == players[consoleplayer].userinfo.GetTeam())
{
if (cl_showchat < CHAT_TEAM_ONLY)
break;
// Said only to members of the player's team
if (deathmatch && teamplay)
Printf(PRINT_TEAMCHAT, "(Team) ");
if ((who & MSG_BOLD) && !cl_noboldchat)
Printf(PRINT_TEAMCHAT, TEXTCOLOR_BOLD "* %s" TEXTCOLOR_BOLD "%s" TEXTCOLOR_BOLD "\n", name, s);
else
Printf(PRINT_TEAMCHAT, "%s" TEXTCOLOR_TEAMCHAT ": %s" TEXTCOLOR_TEAMCHAT "\n", name, s);
if (!cl_nochatsound)
S_Sound(CHAN_VOICE, CHANF_UI, gameinfo.chatSound, 1.0f, ATTN_NONE);
}
}
break;
case DEM_MUSICCHANGE:
S_ChangeMusic(ReadStringConst(stream));
break;
case DEM_PRINT:
Printf("%s", ReadStringConst(stream));
break;
case DEM_CENTERPRINT:
C_MidPrint(nullptr, ReadStringConst(stream));
break;
case DEM_UINFCHANGED:
D_ReadUserInfoStrings(player, stream, true);
break;
case DEM_SINFCHANGED:
D_DoServerInfoChange(stream, false);
break;
case DEM_SINFCHANGEDXOR:
D_DoServerInfoChange(stream, true);
break;
case DEM_GIVECHEAT:
s = ReadStringConst(stream);
cht_Give(&players[player], s, ReadInt32(stream));
if (player != consoleplayer)
{
FString message = GStrings.GetString("TXT_X_CHEATS");
message.Substitute("%s", players[player].userinfo.GetName());
Printf("%s: give %s\n", message.GetChars(), s);
}
break;
case DEM_TAKECHEAT:
s = ReadStringConst(stream);
cht_Take(&players[player], s, ReadInt32(stream));
break;
case DEM_SETINV:
s = ReadStringConst(stream);
i = ReadInt32(stream);
cht_SetInv(&players[player], s, i, !!ReadInt8(stream));
break;
case DEM_WARPCHEAT:
{
int x = ReadInt16(stream);
int y = ReadInt16(stream);
int z = ReadInt16(stream);
P_TeleportMove(players[player].mo, DVector3(x, y, z), true);
}
break;
case DEM_GENERICCHEAT:
cht_DoCheat(&players[player], ReadInt8(stream));
break;
case DEM_CHANGEMAP2:
pos = ReadInt8(stream);
[[fallthrough]];
case DEM_CHANGEMAP:
// Change to another map without disconnecting other players
s = ReadStringConst(stream);
// Using LEVEL_NOINTERMISSION tends to throw the game out of sync.
// That was a long time ago. Maybe it works now?
primaryLevel->flags |= LEVEL_CHANGEMAPCHEAT;
primaryLevel->ChangeLevel(s, pos, 0);
break;
case DEM_SUICIDE:
cht_Suicide(&players[player]);
break;
case DEM_ADDBOT:
primaryLevel->BotInfo.TryAddBot(primaryLevel, stream, player);
break;
case DEM_KILLBOTS:
primaryLevel->BotInfo.RemoveAllBots(primaryLevel, true);
Printf ("Removed all bots\n");
break;
case DEM_CENTERVIEW:
players[player].centering = true;
break;
case DEM_INVUSEALL:
if (gamestate == GS_LEVEL && !paused
&& players[player].playerstate != PST_DEAD)
{
AActor *item = players[player].mo->Inventory;
auto pitype = PClass::FindActor(NAME_PuzzleItem);
while (item != nullptr)
{
AActor *next = item->Inventory;
IFVIRTUALPTRNAME(item, NAME_Inventory, UseAll)
{
VMValue param[] = { item, players[player].mo };
VMCall(func, param, 2, nullptr, 0);
}
item = next;
}
}
break;
case DEM_INVUSE:
case DEM_INVDROP:
{
uint32_t which = ReadInt32(stream);
int amt = -1;
if (cmd == DEM_INVDROP)
amt = ReadInt32(stream);
if (gamestate == GS_LEVEL && !paused
&& players[player].playerstate != PST_DEAD)
{
auto item = players[player].mo->Inventory;
while (item != nullptr && item->InventoryID != which)
item = item->Inventory;
if (item != nullptr)
{
if (cmd == DEM_INVUSE)
players[player].mo->UseInventory(item);
else
players[player].mo->DropInventory(item, amt);
}
}
}
break;
case DEM_SUMMON:
case DEM_SUMMONFRIEND:
case DEM_SUMMONFOE:
case DEM_SUMMONMBF:
case DEM_SUMMON2:
case DEM_SUMMONFRIEND2:
case DEM_SUMMONFOE2:
{
int angle = 0;
int16_t tid = 0;
uint8_t special = 0;
int args[5];
s = ReadStringConst(stream);
if (cmd >= DEM_SUMMON2 && cmd <= DEM_SUMMONFOE2)
{
angle = ReadInt16(stream);
tid = ReadInt16(stream);
special = ReadInt8(stream);
for (i = 0; i < 5; i++) args[i] = ReadInt32(stream);
}
AActor* source = players[player].mo;
if (source != NULL)
{
PClassActor* typeinfo = PClass::FindActor(s);
if (typeinfo != NULL)
{
if (GetDefaultByType(typeinfo)->flags & MF_MISSILE)
{
P_SpawnPlayerMissile(source, 0, 0, 0, typeinfo, source->Angles.Yaw);
}
else
{
const AActor* def = GetDefaultByType(typeinfo);
DVector3 spawnpos = source->Vec3Angle(def->radius * 2 + source->radius, source->Angles.Yaw, 8.);
AActor* spawned = Spawn(primaryLevel, typeinfo, spawnpos, ALLOW_REPLACE);
if (spawned != NULL)
{
spawned->SpawnFlags |= MTF_CONSOLETHING;
if (cmd == DEM_SUMMONFRIEND || cmd == DEM_SUMMONFRIEND2 || cmd == DEM_SUMMONMBF)
{
if (spawned->CountsAsKill())
{
primaryLevel->total_monsters--;
}
spawned->FriendPlayer = player + 1;
spawned->flags |= MF_FRIENDLY;
spawned->LastHeard = players[player].mo;
spawned->health = spawned->SpawnHealth();
if (cmd == DEM_SUMMONMBF)
spawned->flags3 |= MF3_NOBLOCKMONST;
}
else if (cmd == DEM_SUMMONFOE || cmd == DEM_SUMMONFOE2)
{
spawned->FriendPlayer = 0;
spawned->flags &= ~MF_FRIENDLY;
spawned->health = spawned->SpawnHealth();
}
if (cmd >= DEM_SUMMON2 && cmd <= DEM_SUMMONFOE2)
{
spawned->Angles.Yaw = source->Angles.Yaw - DAngle::fromDeg(angle);
spawned->special = special;
for (i = 0; i < 5; i++) {
spawned->args[i] = args[i];
}
if (tid) spawned->SetTID(tid);
}
}
}
}
else
{ // not an actor, must be a visualthinker
PClass* typeinfo = PClass::FindClass(s);
if (typeinfo && typeinfo->IsDescendantOf("VisualThinker"))
{
DVector3 spawnpos = source->Vec3Angle(source->radius * 4, source->Angles.Yaw, 8.);
auto vt = DVisualThinker::NewVisualThinker(source->Level, typeinfo);
if (vt)
{
vt->PT.Pos = spawnpos;
vt->UpdateSector();
}
}
}
}
}
break;
case DEM_SPRAY:
s = ReadStringConst(stream);
SprayDecal(players[player].mo, s);
break;
case DEM_MDK:
s = ReadStringConst(stream);
cht_DoMDK(&players[player], s);
break;
case DEM_PAUSE:
if (gamestate == GS_LEVEL)
{
if (paused)
{
paused = 0;
S_ResumeSound(false);
}
else
{
paused = player + 1;
S_PauseSound(false, false);
}
}
break;
case DEM_SAVEGAME:
if (gamestate == GS_LEVEL)
{
savegamefile = ReadStringConst(stream);
savedescription = ReadStringConst(stream);
if (player != consoleplayer)
{
// Paths sent over the network will be valid for the system that sent
// the save command. For other systems, the path needs to be changed.
FString basename = ExtractFileBase(savegamefile.GetChars(), true);
savegamefile = G_BuildSaveName(basename.GetChars());
}
}
gameaction = ga_savegame;
break;
case DEM_CHECKAUTOSAVE:
// Do not autosave in multiplayer games or when dead.
// For demo playback, DEM_DOAUTOSAVE already exists in the demo if the
// autosave happened. And if it doesn't, we must not generate it.
if (!netgame && !demoplayback && disableautosave < 2 && autosavecount
&& players[player].playerstate == PST_LIVE)
{
Net_WriteInt8(DEM_DOAUTOSAVE);
}
break;
case DEM_DOAUTOSAVE:
gameaction = ga_autosave;
break;
case DEM_FOV:
{
float newfov = ReadFloat(stream);
if (newfov != players[player].DesiredFOV)
{
Printf("FOV%s set to %g\n",
player == Net_Arbitrator ? " for everyone" : "",
newfov);
}
for (auto client : NetworkClients)
players[client].DesiredFOV = newfov;
}
break;
case DEM_MYFOV:
players[player].DesiredFOV = ReadFloat(stream);
break;
case DEM_RUNSCRIPT:
case DEM_RUNSCRIPT2:
{
int snum = ReadInt16(stream);
int argn = ReadInt8(stream);
RunScript(stream, players[player].mo, snum, argn, (cmd == DEM_RUNSCRIPT2) ? ACS_ALWAYS : 0);
}
break;
case DEM_RUNNAMEDSCRIPT:
{
s = ReadStringConst(stream);
int argn = ReadInt8(stream);
RunScript(stream, players[player].mo, -FName(s).GetIndex(), argn & 127, (argn & 128) ? ACS_ALWAYS : 0);
}
break;
case DEM_RUNSPECIAL:
{
int snum = ReadInt16(stream);
int argn = ReadInt8(stream);
int arg[5] = {};
for (i = 0; i < argn; ++i)
{
int argval = ReadInt32(stream);
if ((unsigned)i < countof(arg))
arg[i] = argval;
}
if (!CheckCheatmode(player == consoleplayer))
P_ExecuteSpecial(primaryLevel, snum, nullptr, players[player].mo, false, arg[0], arg[1], arg[2], arg[3], arg[4]);
}
break;
case DEM_CROUCH:
if (gamestate == GS_LEVEL && players[player].mo != nullptr
&& players[player].playerstate == PST_LIVE && !(players[player].oldbuttons & BT_JUMP)
&& !P_IsPlayerTotallyFrozen(&players[player]))
{
players[player].crouching = players[player].crouchdir < 0 ? 1 : -1;
}
break;
case DEM_MORPHEX:
{
s = ReadStringConst(stream);
FString msg = cht_Morph(players + player, PClass::FindActor(s), false);
if (player == consoleplayer)
Printf("%s\n", msg[0] != '\0' ? msg.GetChars() : "Morph failed.");
}
break;
case DEM_ADDCONTROLLER:
{
uint8_t playernum = ReadInt8(stream);
players[playernum].settings_controller = true;
if (consoleplayer == playernum || consoleplayer == Net_Arbitrator)
Printf("%s has been added to the controller list.\n", players[playernum].userinfo.GetName());
}
break;
case DEM_DELCONTROLLER:
{
uint8_t playernum = ReadInt8(stream);
players[playernum].settings_controller = false;
if (consoleplayer == playernum || consoleplayer == Net_Arbitrator)
Printf("%s has been removed from the controller list.\n", players[playernum].userinfo.GetName());
}
break;
case DEM_KILLCLASSCHEAT:
{
s = ReadStringConst(stream);
int killcount = 0;
PClassActor *cls = PClass::FindActor(s);
if (cls != nullptr)
{
killcount = primaryLevel->Massacre(false, cls->TypeName);
PClassActor *cls_rep = cls->GetReplacement(primaryLevel);
if (cls != cls_rep)
killcount += primaryLevel->Massacre(false, cls_rep->TypeName);
Printf("Killed %d monsters of type %s.\n", killcount, s);
}
else
{
Printf("%s is not an actor class.\n", s);
}
}
break;
case DEM_REMOVE:
{
s = ReadStringConst(stream);
int removecount = 0;
PClassActor *cls = PClass::FindActor(s);
if (cls != nullptr && cls->IsDescendantOf(RUNTIME_CLASS(AActor)))
{
removecount = RemoveClass(primaryLevel, cls);
const PClass *cls_rep = cls->GetReplacement(primaryLevel);
if (cls != cls_rep)
removecount += RemoveClass(primaryLevel, cls_rep);
Printf("Removed %d actors of type %s.\n", removecount, s);
}
else
{
Printf("%s is not an actor class.\n", s);
}
}
break;
case DEM_CONVREPLY:
case DEM_CONVCLOSE:
case DEM_CONVNULL:
P_ConversationCommand(cmd, player, stream);
break;
case DEM_SETSLOT:
case DEM_SETSLOTPNUM:
{
int pnum = player;
if (cmd == DEM_SETSLOTPNUM)
pnum = ReadInt8(stream);
unsigned int slot = ReadInt8(stream);
int count = ReadInt8(stream);
if (slot < NUM_WEAPON_SLOTS)
players[pnum].weapons.ClearSlot(slot);
for (i = 0; i < count; ++i)
{
PClassActor *wpn = Net_ReadWeapon(stream);
players[pnum].weapons.AddSlot(slot, wpn, pnum == consoleplayer);
}
}
break;
case DEM_ADDSLOT:
{
int slot = ReadInt8(stream);
PClassActor *wpn = Net_ReadWeapon(stream);
players[player].weapons.AddSlot(slot, wpn, player == consoleplayer);
}
break;
case DEM_ADDSLOTDEFAULT:
{
int slot = ReadInt8(stream);
PClassActor *wpn = Net_ReadWeapon(stream);
players[player].weapons.AddSlotDefault(slot, wpn, player == consoleplayer);
}
break;
case DEM_SETPITCHLIMIT:
players[player].MinPitch = DAngle::fromDeg(-ReadInt8(stream)); // up
players[player].MaxPitch = DAngle::fromDeg(ReadInt8(stream)); // down
break;
case DEM_REVERTCAMERA:
players[player].camera = players[player].mo;
break;
case DEM_FINISHGAME:
// Simulate an end-of-game action
primaryLevel->ChangeLevel(nullptr, 0, 0);
break;
case DEM_NETEVENT:
{
s = ReadStringConst(stream);
int argn = ReadInt8(stream);
int arg[3] = { 0, 0, 0 };
for (int i = 0; i < 3; i++)
arg[i] = ReadInt32(stream);
bool manual = !!ReadInt8(stream);
primaryLevel->localEventManager->Console(player, s, arg[0], arg[1], arg[2], manual, false);
}
break;
case DEM_ENDSCREENJOB:
EndScreenJob();
break;
case DEM_ZSC_CMD:
{
FName cmd = ReadStringConst(stream);
unsigned int size = ReadInt16(stream);
TArray<uint8_t> buffer;
if (size)
{
buffer.Grow(size);
for (unsigned int i = 0u; i < size; ++i)
buffer.Push(ReadInt8(stream));
}
FNetworkCommand netCmd = { player, cmd, buffer };
primaryLevel->localEventManager->NetCommand(netCmd);
}
break;
case DEM_CHANGESKILL:
NextSkill = ReadInt32(stream);
break;
case DEM_KICK:
{
const int pNum = ReadInt8(stream);
if (pNum == consoleplayer)
{
I_Error("You have been kicked from the game");
}
else
{
Printf("%s has been kicked from the game\n", players[pNum].userinfo.GetName());
if (NetworkClients.InGame(pNum))
DisconnectClient(pNum);
}
}
break;
default:
I_Error("Unknown net command: %d", cmd);
break;
}
}
// Used by DEM_RUNSCRIPT, DEM_RUNSCRIPT2, and DEM_RUNNAMEDSCRIPT
static void RunScript(uint8_t **stream, AActor *pawn, int snum, int argn, int always)
{
// Scripts can be invoked without a level loaded, e.g. via puke(name) CCMD in fullscreen console
if (pawn == nullptr)
return;
int arg[4] = {};
for (int i = 0; i < argn; ++i)
{
int argval = ReadInt32(stream);
if ((unsigned)i < countof(arg))
arg[i] = argval;
}
P_StartScript(pawn->Level, pawn, nullptr, snum, primaryLevel->MapName.GetChars(), arg, min<int>(countof(arg), argn), ACS_NET | always);
}
// TODO: This really needs to be replaced with some kind of packet system that can simply read through packets and opt
// not to execute them. Right now this is making setting up net commands a nightmare.
// Reads through the network stream but doesn't actually execute any command. Used for getting the size of a stream.
// The skip amount is the number of bytes the command possesses. This should mirror the bytes in Net_DoCommand().
void Net_SkipCommand(int cmd, uint8_t **stream)
{
size_t skip = 0;
switch (cmd)
{
case DEM_SAY:
skip = strlen((char *)(*stream + 1)) + 2;
break;
case DEM_ADDBOT:
skip = strlen((char *)(*stream + 1)) + 6;
break;
case DEM_GIVECHEAT:
case DEM_TAKECHEAT:
skip = strlen((char *)(*stream)) + 5;
break;
case DEM_SETINV:
skip = strlen((char *)(*stream)) + 6;
break;
case DEM_NETEVENT:
skip = strlen((char *)(*stream)) + 15;
break;
case DEM_ZSC_CMD:
skip = strlen((char*)(*stream)) + 1;
skip += (((*stream)[skip] << 8) | (*stream)[skip + 1]) + 2;
break;
case DEM_SUMMON2:
case DEM_SUMMONFRIEND2:
case DEM_SUMMONFOE2:
skip = strlen((char *)(*stream)) + 26;
break;
case DEM_CHANGEMAP2:
skip = strlen((char *)(*stream + 1)) + 2;
break;
case DEM_MUSICCHANGE:
case DEM_PRINT:
case DEM_CENTERPRINT:
case DEM_UINFCHANGED:
case DEM_CHANGEMAP:
case DEM_SUMMON:
case DEM_SUMMONFRIEND:
case DEM_SUMMONFOE:
case DEM_SUMMONMBF:
case DEM_REMOVE:
case DEM_SPRAY:
case DEM_MORPHEX:
case DEM_KILLCLASSCHEAT:
case DEM_MDK:
skip = strlen((char *)(*stream)) + 1;
break;
case DEM_WARPCHEAT:
skip = 6;
break;
case DEM_INVUSE:
case DEM_FOV:
case DEM_MYFOV:
case DEM_CHANGESKILL:
skip = 4;
break;
case DEM_INVDROP:
skip = 8;
break;
case DEM_GENERICCHEAT:
case DEM_DROPPLAYER:
case DEM_ADDCONTROLLER:
case DEM_DELCONTROLLER:
case DEM_KICK:
skip = 1;
break;
case DEM_SAVEGAME:
skip = strlen((char *)(*stream)) + 1;
skip += strlen((char *)(*stream) + skip) + 1;
break;
case DEM_SINFCHANGEDXOR:
case DEM_SINFCHANGED:
{
uint8_t t = **stream;
skip = 1 + (t & 63);
if (cmd == DEM_SINFCHANGED)
{
switch (t >> 6)
{
case CVAR_Bool:
skip += 1;
break;
case CVAR_Int:
case CVAR_Float:
skip += 4;
break;
case CVAR_String:
skip += strlen((char*)(*stream + skip)) + 1;
break;
}
}
else
{
skip += 1;
}
}
break;
case DEM_RUNSCRIPT:
case DEM_RUNSCRIPT2:
skip = 3 + *(*stream + 2) * 4;
break;
case DEM_RUNNAMEDSCRIPT:
skip = strlen((char *)(*stream)) + 2;
skip += ((*(*stream + skip - 1)) & 127) * 4;
break;
case DEM_RUNSPECIAL:
skip = 3 + *(*stream + 2) * 4;
break;
case DEM_CONVREPLY:
skip = 3;
break;
case DEM_SETSLOT:
case DEM_SETSLOTPNUM:
{
skip = 2 + (cmd == DEM_SETSLOTPNUM);
for (int numweapons = (*stream)[skip-1]; numweapons > 0; --numweapons)
skip += 1 + ((*stream)[skip] >> 7);
}
break;
case DEM_ADDSLOT:
case DEM_ADDSLOTDEFAULT:
skip = 2 + ((*stream)[1] >> 7);
break;
case DEM_SETPITCHLIMIT:
skip = 2;
break;
}
*stream += skip;
}
// This was taken out of shared_hud, because UI code shouldn't do low level calculations that may change if the backing implementation changes.
int Net_GetLatency(int* localDelay, int* arbitratorDelay)
{
const int gameDelayMs = (ClientTic - gametic) * 1000 / TICRATE;
int severity = 0;
if (gameDelayMs >= 160)
severity = 3;
else if (gameDelayMs >= 120)
severity = 2;
else if (gameDelayMs >= 80)
severity = 1;
*localDelay = gameDelayMs;
*arbitratorDelay = NetMode == NET_PacketServer ? ClientStates[consoleplayer].AverageLatency : ClientStates[Net_Arbitrator].AverageLatency;
return severity;
}
//==========================================================================
//
//
//
//==========================================================================
// [RH] List "ping" times
CCMD(pings)
{
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
if (NetworkClients.Size() <= 1)
return;
// In Packet Server mode, this displays the latency each individual client has to the host
for (auto client : NetworkClients)
{
if ((NetMode == NET_PeerToPeer && client != consoleplayer) || (NetMode == NET_PacketServer && client != Net_Arbitrator))
Printf("%ums %s\n", ClientStates[client].AverageLatency, players[client].userinfo.GetName());
}
}
CCMD(listplayers)
{
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
for (auto client : NetworkClients)
{
if (client == consoleplayer)
Printf("* ");
Printf("%s - %d\n", players[client].userinfo.GetName(), client);
}
}
CCMD(kick)
{
if (argv.argc() == 1)
{
Printf("Usage: kick <player number>\n");
return;
}
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
// Dont give settings controllers access to this. That should be reserved as a separate power
// the host can grant.
if (consoleplayer != Net_Arbitrator)
{
Printf("Only the host is allowed to kick other players\n");
return;
}
int pNum = -1;
if (!C_IsValidInt(argv[1], pNum))
{
Printf("A player number must be provided. Use listplayers for more information\n");
return;
}
if (pNum == consoleplayer || pNum < 0 || pNum >= MAXPLAYERS)
{
Printf("Invalid player number provided\n");
return;
}
if (!NetworkClients.InGame(pNum))
{
Printf("Player is not currently in the game\n");
return;
}
Net_WriteInt8(DEM_KICK);
Net_WriteInt8(pNum);
}
CCMD(mute)
{
if (argv.argc() == 1)
{
Printf("Usage: mute <player number> - Don't receive messages from this player\n");
return;
}
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
int pNum = -1;
if (!C_IsValidInt(argv[1], pNum))
{
Printf("A player number must be provided. Use listplayers for more information\n");
return;
}
if (pNum == consoleplayer || pNum < 0 || pNum >= MAXPLAYERS)
{
Printf("Invalid player number provided\n");
return;
}
if (!NetworkClients.InGame(pNum))
{
Printf("Player is not currently in the game\n");
return;
}
MutedClients |= (uint64_t)1u << pNum;
}
CCMD(muteall)
{
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
for (auto client : NetworkClients)
{
if (client != consoleplayer)
MutedClients |= (uint64_t)1u << client;
}
}
CCMD(listmuted)
{
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
bool found = false;
for (auto client : NetworkClients)
{
if (MutedClients & ((uint64_t)1u << client))
{
found = true;
Printf("%s - %d\n", players[client].userinfo.GetName(), client);
}
}
if (!found)
Printf("No one currently muted\n");
}
CCMD(unmute)
{
if (argv.argc() == 1)
{
Printf("Usage: unmute <player number> - Allow messages from this player again\n");
return;
}
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
int pNum = -1;
if (!C_IsValidInt(argv[1], pNum))
{
Printf("A player number must be provided. Use listplayers for more information\n");
return;
}
if (pNum == consoleplayer || pNum < 0 || pNum >= MAXPLAYERS)
{
Printf("Invalid player number provided\n");
return;
}
MutedClients &= ~((uint64_t)1u << pNum);
}
CCMD(unmuteall)
{
if (!netgame)
{
Printf("Not currently in a net game\n");
return;
}
MutedClients = 0u;
}
//==========================================================================
//
// Network_Controller
//
// Implement players who have the ability to change settings in a network
// game.
//
//==========================================================================
static void Network_Controller(int pNum, bool add)
{
if (!netgame)
{
Printf("This command can only be used when playing a net game.\n");
return;
}
if (consoleplayer != Net_Arbitrator)
{
Printf("This command is only accessible to the host.\n");
return;
}
if (pNum == Net_Arbitrator)
{
Printf("The host cannot change their own settings controller status.\n");
return;
}
if (!NetworkClients.InGame(pNum))
{
Printf("Player %d is not a valid client\n", pNum);
return;
}
if (players[pNum].settings_controller && add)
{
Printf("%s is already on the setting controller list.\n", players[pNum].userinfo.GetName());
return;
}
if (!players[pNum].settings_controller && !add)
{
Printf("%s is not on the setting controller list.\n", players[pNum].userinfo.GetName());
return;
}
Net_WriteInt8(add ? DEM_ADDCONTROLLER : DEM_DELCONTROLLER);
Net_WriteInt8(pNum);
}
//==========================================================================
//
// CCMD net_addcontroller
//
//==========================================================================
CCMD(net_addcontroller)
{
if (argv.argc() < 2)
{
Printf("Usage: net_addcontroller <player num>\n");
return;
}
Network_Controller(atoi (argv[1]), true);
}
//==========================================================================
//
// CCMD net_removecontroller
//
//==========================================================================
CCMD(net_removecontroller)
{
if (argv.argc() < 2)
{
Printf("Usage: net_removecontroller <player num>\n");
return;
}
Network_Controller(atoi(argv[1]), false);
}
//==========================================================================
//
// CCMD net_listcontrollers
//
//==========================================================================
CCMD(net_listcontrollers)
{
if (!netgame)
{
Printf ("This command can only be used when playing a net game.\n");
return;
}
Printf("The following players can change the game settings:\n");
for (auto client : NetworkClients)
{
if (players[client].settings_controller)
Printf("- %s\n", players[client].userinfo.GetName());
}
}
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