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/*
This file is part of Warzone 2100.
Copyright (C) 1999-2004 Eidos Interactive
Copyright (C) 2005-2011 Warzone 2100 Project
Warzone 2100 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 2 of the License, or
(at your option) any later version.
Warzone 2100 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 Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file netplay.c
*
* Basic netcode.
*/
#include "lib/framework/frame.h"
#include "lib/framework/string_ext.h"
#include "lib/framework/crc.h"
#include "lib/framework/file.h"
#include "lib/gamelib/gtime.h"
#include "src/component.h" // FIXME: we need to handle this better
#include "src/modding.h" // FIXME: we need to handle this better
#include <time.h> // for stats
#include <SDL_timer.h>
#include <SDL_thread.h>
#include <physfs.h>
#include <string.h>
#include <memory>
#include "netplay.h"
#include "netlog.h"
#include "netsocket.h"
#include "miniupnpc/miniwget.h"
#include "miniupnpc/miniupnpc.h"
#include "miniupnpc/upnpcommands.h"
#include "lib/exceptionhandler/dumpinfo.h"
#include "src/multistat.h"
#include "src/multijoin.h"
#include "src/multiint.h"
#include "src/multiplay.h"
#include "src/warzoneconfig.h"
#ifdef WZ_OS_LINUX
#include <execinfo.h> // Nonfatal runtime backtraces.
#endif //WZ_OS_LINUX
// For /(hton|ntoh)[sh]/.
#if defined(WZ_OS_UNIX)
# include <arpa/inet.h>
#endif
#ifdef WZ_OS_WIN
# include <winsock2.h>
#endif
// WARNING !!! This is initialised via configuration.c !!!
char masterserver_name[255] = {'\0'};
static unsigned int masterserver_port = 0, gameserver_port = 0;
#define NET_TIMEOUT_DELAY 2500 // we wait this amount of time for socket activity
#define NET_READ_TIMEOUT 0
/*
* === Using new socket code, this might not hold true any longer ===
* NOTE /rant: If the buffer size isn't big enough, it will invalidate the socket.
* Which means that we need to allocate a buffer big enough to handle worst case
* situations.
* reference: MaxMsgSize in netplay.h (currently set to 16K)
*
*/
#define NET_BUFFER_SIZE (MaxMsgSize) // Would be 16K
// ////////////////////////////////////////////////////////////////////////
// Function prototypes
static void NETplayerLeaving(UDWORD player); // Cleanup sockets on player leaving (nicely)
static void NETplayerDropped(UDWORD player); // Broadcast NET_PLAYER_DROPPED & cleanup
static void NETregisterServer(int state);
static void NETallowJoining(void);
static void recvDebugSync(NETQUEUE queue);
static bool onBanList(const char *ip);
static void addToBanList(const char *ip, const char *name);
/*
* Network globals, these are part of the new network API
*/
SYNC_COUNTER sync_counter; // keeps track on how well we are in sync
// ////////////////////////////////////////////////////////////////////////
// Types
struct NETSTATS // data regarding the last one second or so.
{
UDWORD bytesRecvd;
UDWORD bytesSent; // number of bytes sent in about 1 sec.
UDWORD packetsSent;
UDWORD packetsRecvd;
};
struct NET_PLAYER_DATA
{
uint16_t size;
void* data;
size_t buffer_size;
};
// ////////////////////////////////////////////////////////////////////////
// Variables
NETPLAY NetPlay;
PLAYER_IP *IPlist = NULL;
static BOOL allow_joining = false;
static bool server_not_there = false;
static GAMESTRUCT gamestruct;
// update flags
bool netPlayersUpdated;
int mapDownloadProgress;
/**
* Socket used for these purposes:
* * Host a game, be a server.
* * Connect to the lobby server.
* * Join a server for a game.
*/
static Socket* tcp_socket = NULL; //socket used to talk to lobbyserver/ host machine
static Socket *bsocket = NULL; //buffered socket (holds tcp_socket) (clients only?)
static Socket *connected_bsocket[MAX_CONNECTED_PLAYERS] = { NULL };
static SocketSet* socket_set = NULL;
// UPnP
static int upnp = false;
static bool upnp_done = false;
SDL_Thread *upnpdiscover;
static struct UPNPUrls urls;
static struct IGDdatas data;
// local ip address
static char lanaddr[16];
static char clientAddress[40] = { '\0' };
/**
* Used for connections with clients.
*/
static Socket* tmp_socket[MAX_TMP_SOCKETS] = { NULL };
static SocketSet* tmp_socket_set = NULL;
static char* hostname;
static NETSTATS nStats = { 0, 0, 0, 0 };
static int32_t NetGameFlags[4] = { 0, 0, 0, 0 };
char iptoconnect[PATH_MAX] = "\0"; // holds IP/hostname from command line
unsigned NET_PlayerConnectionStatus[CONNECTIONSTATUS_NORMAL][MAX_PLAYERS];
// ////////////////////////////////////////////////////////////////////////////
#define VersionStringSize 80
/************************************************************************************
** NOTE (!) Change the VersionString when net code changes!!
** ie ("trunk", "2.1.3", "3.0", ...)
************************************************************************************
**/
char VersionString[VersionStringSize] = "master_20110228";
static int NETCODE_VERSION_MAJOR = 4;
static int NETCODE_VERSION_MINOR = 20110228;
bool NETisCorrectVersion(uint32_t game_version_major, uint32_t game_version_minor)
{
return (NETCODE_VERSION_MAJOR == game_version_major && NETCODE_VERSION_MINOR == game_version_minor);
}
bool NETgameIsCorrectVersion(GAMESTRUCT* check_game)
{
return (NETCODE_VERSION_MAJOR == check_game->game_version_major && NETCODE_VERSION_MINOR == check_game->game_version_minor);
}
// Sets if the game is password protected or not
void NETGameLocked( bool flag)
{
NetPlay.GamePassworded = flag;
gamestruct.privateGame = flag;
NETlogEntry("Password is", SYNC_FLAG, NetPlay.GamePassworded);
debug(LOG_NET, "Passworded game is %s", NetPlay.GamePassworded ? "TRUE" : "FALSE" );
}
// Sets the game password
void NETsetGamePassword(const char *password)
{
sstrcpy(NetPlay.gamePassword, password);
debug(LOG_NET, "Password entered is: [%s]", NetPlay.gamePassword);
}
// Resets the game password
void NETresetGamePassword(void)
{
sstrcpy(NetPlay.gamePassword, _("Enter password here"));
debug(LOG_NET, "password reset to 'Enter password here'");
NETGameLocked(false);
}
// *********** Socket with buffer that read NETMSGs ******************
static size_t NET_fillBuffer(Socket **pSocket, SocketSet* socket_set, uint8_t *bufstart, int bufsize)
{
Socket *socket = *pSocket;
ssize_t size;
if (!socketReadReady(socket))
{
return 0;
}
size = readNoInt(socket, bufstart, bufsize);
if ((size != 0 || !socketReadDisconnected(socket)) && size != SOCKET_ERROR)
{
return size;
}
else
{
if (size == 0)
{
debug(LOG_NET, "Connection closed from the other side");
NETlogEntry("Connection closed from the other side..", SYNC_FLAG, selectedPlayer);
}
else
{
debug(LOG_NET, "%s tcp_socket %p is now invalid", strSockError(getSockErr()), socket);
}
// an error occured, or the remote host has closed the connection.
if (socket_set != NULL)
{
SocketSet_DelSocket(socket_set, socket);
}
ASSERT(size <= bufsize, "Socket buffer is too small!");
if (size > bufsize)
{
debug(LOG_ERROR, "Fatal connection error: buffer size of (%d) was too small, current byte count was %ld", bufsize, (long)size);
NETlogEntry("Fatal connection error: buffer size was too small!", SYNC_FLAG, selectedPlayer);
}
if (tcp_socket == socket)
{
debug(LOG_NET, "Host connection was lost!");
NETlogEntry("Host connection was lost!", SYNC_FLAG, selectedPlayer);
tcp_socket = NULL;
bsocket = NULL; // Because tcp_socket == bsocket...
//Game is pretty much over --should just end everything when HOST dies.
NetPlay.isHostAlive = false;
setLobbyError(ERROR_HOSTDROPPED);
NETclose();
return 0;
}
socketClose(socket);
*pSocket = NULL;
}
return 0;
}
void NET_InitPlayer(int i, bool initPosition)
{
NetPlay.players[i].allocated = false;
NetPlay.players[i].heartattacktime = 0;
NetPlay.players[i].heartbeat = true; // we always start with a hearbeat
NetPlay.players[i].kick = false;
if (!NetPlay.isHost)
{ // only clear name outside of games.
NetPlay.players[i].name[0] = '\0';
}
if (initPosition)
{
NetPlay.players[i].colour = i;
setPlayerColour(i, i); // PlayerColour[] in component.c must match this! Why is this in more than one place??!
NetPlay.players[i].position = i;
NetPlay.players[i].team = i;
}
NetPlay.players[i].ready = false;
NetPlay.players[i].needFile = false;
if (NetPlay.bComms)
{
NetPlay.players[i].ai = AI_OPEN;
}
else
{
NetPlay.players[i].ai = 0; // default AI
}
NetPlay.players[i].difficulty = 1; // normal
NetPlay.players[i].wzFile.isCancelled = false;
NetPlay.players[i].wzFile.isSending = false;
}
void NET_InitPlayers()
{
unsigned int i;
for (i = 0; i < MAX_CONNECTED_PLAYERS; ++i)
{
NET_InitPlayer(i, true);
NETinitQueue(NETnetQueue(i));
}
NETinitQueue(NETbroadcastQueue());
NetPlay.hostPlayer = NET_HOST_ONLY; // right now, host starts always at index zero
NetPlay.playercount = 0;
NetPlay.pMapFileHandle = NULL;
debug(LOG_NET, "Players initialized");
}
static void NETSendNPlayerInfoTo(uint32_t *index, uint32_t indexLen, unsigned to)
{
int n;
NETbeginEncode(NETnetQueue(to), NET_PLAYER_INFO);
NETuint32_t(&indexLen);
for (n = 0; n < indexLen; ++n)
{
debug(LOG_NET, "sending player's (%u) info to all players", index[n]);
NETlogEntry(" sending player's info to all players", SYNC_FLAG, index[n]);
NETuint32_t(&index[n]);
NETbool(&NetPlay.players[index[n]].allocated);
NETbool(&NetPlay.players[index[n]].heartbeat);
NETbool(&NetPlay.players[index[n]].kick);
NETstring(NetPlay.players[index[n]].name, sizeof(NetPlay.players[index[n]].name));
NETuint32_t(&NetPlay.players[index[n]].heartattacktime);
NETint32_t(&NetPlay.players[index[n]].colour);
NETint32_t(&NetPlay.players[index[n]].position);
NETint32_t(&NetPlay.players[index[n]].team);
NETbool(&NetPlay.players[index[n]].ready);
NETint8_t(&NetPlay.players[index[n]].ai);
NETint8_t(&NetPlay.players[index[n]].difficulty);
NETuint8_t(&game.skDiff[index[n]]); // This one might be possible to calculate from the other values. // TODO game.skDiff should probably be eliminated somehow.
}
NETend();
}
static void NETSendPlayerInfoTo(uint32_t index, unsigned to)
{
NETSendNPlayerInfoTo(&index, 1, to);
}
static void NETSendAllPlayerInfoTo(unsigned to)
{
static uint32_t indices[MAX_PLAYERS];
for (int i = 0; i < MAX_PLAYERS; ++i)
{
indices[i] = i;
}
ASSERT_OR_RETURN( , NetPlay.isHost == true, "Invalid call for non-host");
NETSendNPlayerInfoTo(indices, ARRAY_SIZE(indices), to);
}
void NETBroadcastTwoPlayerInfo(uint32_t index1, uint32_t index2)
{
uint32_t indices[2] = {index1, index2};
NETSendNPlayerInfoTo(indices, 2, NET_ALL_PLAYERS);
}
void NETBroadcastPlayerInfo(uint32_t index)
{
NETSendPlayerInfoTo(index, NET_ALL_PLAYERS);
}
static signed int NET_CreatePlayer(const char* name)
{
signed int index;
for (index = 0; index < MAX_CONNECTED_PLAYERS; index++)
{
if (NetPlay.players[index].allocated == false && NetPlay.players[index].ai == AI_OPEN)
{
char buf[250] = {'\0'};
ssprintf(buf, "A new player has been created. Player, %s, is set to slot %u", name, index);
debug(LOG_NET,"%s", buf);
NETlogEntry(buf, SYNC_FLAG, index);
NET_InitPlayer(index, false); // re-init everything
NetPlay.players[index].allocated = true;
sstrcpy(NetPlay.players[index].name, name);
NetPlay.playercount++;
sync_counter.joins++;
return index;
}
}
debug(LOG_ERROR, "Could not find place for player %s", name);
NETlogEntry("Could not find a place for player!", SYNC_FLAG, index);
return -1;
}
static void NET_DestroyPlayer(unsigned int index)
{
debug(LOG_NET, "Freeing slot %u for a new player", index);
NETlogEntry("Freeing slot for a new player.", SYNC_FLAG, index);
if (NetPlay.players[index].allocated)
{
NetPlay.players[index].allocated = false;
NetPlay.playercount--;
gamestruct.desc.dwCurrentPlayers = NetPlay.playercount;
if (allow_joining && NetPlay.isHost)
{
// Update player count in the lobby by disconnecting
// and reconnecting
NETregisterServer(2);
}
}
NET_InitPlayer(index, false); // reinitialize
}
/**
* @note Connection dropped. Handle it gracefully.
* \param index
*/
static void NETplayerClientDisconnect(uint32_t index)
{
if(connected_bsocket[index])
{
debug(LOG_NET, "Player (%u) has left unexpectedly, closing socket %p", index, connected_bsocket[index]);
NETplayerLeaving(index);
NETlogEntry("Player has left unexpectedly.", SYNC_FLAG, index);
// Announce to the world. This was really icky, because we may have been calling the send
// function recursively. We really ought to have had a send queue, and now we finally do...
NETbeginEncode(NETbroadcastQueue(), NET_PLAYER_DROPPED);
NETuint32_t(&index);
NETend();
}
else
{
debug(LOG_ERROR, "Player (%u) has left unexpectedly - but socket already closed?", index);
}
}
/**
* @note When a player leaves nicely (ie, we got a NET_PLAYER_LEAVING
* message), we clean up the socket that we used.
* \param index
*/
static void NETplayerLeaving(UDWORD index)
{
if(connected_bsocket[index])
{
debug(LOG_NET, "Player (%u) has left, closing socket %p", index, connected_bsocket[index]);
NETlogEntry("Player has left nicely.", SYNC_FLAG, index);
// Although we can get a error result from DelSocket, it don't really matter here.
SocketSet_DelSocket(socket_set, connected_bsocket[index]);
socketClose(connected_bsocket[index]);
connected_bsocket[index] = NULL;
}
else
{
debug(LOG_NET, "Player (%u) has left nicely, socket already closed?", index);
}
sync_counter.left++;
MultiPlayerLeave(index); // more cleanup
NET_DestroyPlayer(index); // sets index player's array to false
}
/**
* @note When a player's connection is broken we broadcast the NET_PLAYER_DROPPED
* message.
* \param index
*/
static void NETplayerDropped(UDWORD index)
{
uint32_t id = index;
// Send message type specifically for dropped / disconnects
NETbeginEncode(NETbroadcastQueue(), NET_PLAYER_DROPPED);
NETuint32_t(&id);
NETend();
debug(LOG_INFO, "sending NET_PLAYER_DROPPED for player %d", id);
sync_counter.drops++;
NET_DestroyPlayer(id); // just clears array
MultiPlayerLeave(id); // more cleanup
NETsetPlayerConnectionStatus(CONNECTIONSTATUS_PLAYER_DROPPED, id);
}
/**
* @note Cleanup for when a player is kicked.
* \param index
*/
void NETplayerKicked(UDWORD index)
{
// kicking a player counts as "leaving nicely", since "nicely" in this case
// simply means "there wasn't a connection error."
debug(LOG_INFO, "Player %u was kicked.", index);
sync_counter.kicks++;
NETlogEntry("Player was kicked.", SYNC_FLAG, index);
addToBanList(NetPlay.players[index].IPtextAddress, NetPlay.players[index].name);
NETplayerLeaving(index); // need to close socket for the player that left.
NETsetPlayerConnectionStatus(CONNECTIONSTATUS_PLAYER_LEAVING, index);
}
// ////////////////////////////////////////////////////////////////////////
// rename the local player
BOOL NETchangePlayerName(UDWORD index, char *newName)
{
if(!NetPlay.bComms)
{
sstrcpy(NetPlay.players[0].name, newName);
return true;
}
debug(LOG_NET, "Requesting a change of player name for pid=%u to %s", index, newName);
NETlogEntry("Player wants a name change.", SYNC_FLAG, index);
sstrcpy(NetPlay.players[index].name, newName);
NETBroadcastPlayerInfo(index);
return true;
}
void NETfixDuplicatePlayerNames(void)
{
char name[StringSize];
unsigned i, j, pass;
for (i = 1; i != MAX_PLAYERS; ++i)
{
sstrcpy(name, NetPlay.players[i].name);
if (name[0] == '\0')
{
continue; // Ignore empty names.
}
for (pass = 0; pass != 101; ++pass)
{
if (pass != 0)
{
ssprintf(name, "%s_%X", NetPlay.players[i].name, pass + 1);
}
for (j = 0; j != i; ++j)
{
if (strcmp(name, NetPlay.players[j].name) == 0)
{
break; // Duplicate name.
}
}
if (i == j)
{
break; // Unique name.
}
}
if (pass != 0)
{
NETchangePlayerName(i, name);
}
}
}
// ////////////////////////////////////////////////////////////////////////
// return one of the four user flags in the current sessiondescription.
SDWORD NETgetGameFlags(UDWORD flag)
{
if (flag < 1 || flag > 4)
{
return 0;
}
else
{
return NetGameFlags[flag-1];
}
}
static void NETsendGameFlags(void)
{
debug(LOG_NET, "sending game flags");
NETbeginEncode(NETbroadcastQueue(), NET_GAME_FLAGS);
{
// Send the amount of game flags we're about to send
uint8_t i, count = ARRAY_SIZE(NetGameFlags);
NETuint8_t(&count);
// Send over all game flags
for (i = 0; i < count; ++i)
{
NETint32_t(&NetGameFlags[i]);
}
}
NETend();
}
// ////////////////////////////////////////////////////////////////////////
// Set a game flag
BOOL NETsetGameFlags(UDWORD flag, SDWORD value)
{
if(!NetPlay.bComms)
{
return true;
}
if (flag > 0 && flag < 5)
{
return (NetGameFlags[flag-1] = value);
}
NETsendGameFlags();
return true;
}
/**
* @note \c game is being sent to the master server (if hosting)
* The implementation of NETsendGAMESTRUCT <em>must</em> guarantee to
* pack it in network byte order (big-endian).
*
* @return true on success, false when a socket error has occurred
*
* @see GAMESTRUCT,NETrecvGAMESTRUCT
*/
static bool NETsendGAMESTRUCT(Socket* sock, const GAMESTRUCT* ourgamestruct)
{
// A buffer that's guaranteed to have the correct size (i.e. it
// circumvents struct padding, which could pose a problem). Initialise
// to zero so that we can be sure we're not sending any (undefined)
// memory content across the network.
char buf[sizeof(ourgamestruct->GAMESTRUCT_VERSION) + sizeof(ourgamestruct->name) + sizeof(ourgamestruct->desc.host) + (sizeof(int32_t) * 8) +
sizeof(ourgamestruct->secondaryHosts) + sizeof(ourgamestruct->extra) + sizeof(ourgamestruct->mapname) + sizeof(ourgamestruct->hostname) + sizeof(ourgamestruct->versionstring) +
sizeof(ourgamestruct->modlist) + (sizeof(uint32_t) * 9) ] = { 0 };
char *buffer = buf;
unsigned int i;
ssize_t result;
// Now dump the data into the buffer
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->GAMESTRUCT_VERSION);
buffer += sizeof(uint32_t);
// Copy a string
strlcpy(buffer, ourgamestruct->name, sizeof(ourgamestruct->name));
buffer += sizeof(ourgamestruct->name);
// Copy 32bit large big endian numbers
*(int32_t*)buffer = htonl(ourgamestruct->desc.dwSize);
buffer += sizeof(int32_t);
*(int32_t*)buffer = htonl(ourgamestruct->desc.dwFlags);
buffer += sizeof(int32_t);
// Copy yet another string
strlcpy(buffer, ourgamestruct->desc.host, sizeof(ourgamestruct->desc.host));
buffer += sizeof(ourgamestruct->desc.host);
// Copy 32bit large big endian numbers
*(int32_t*)buffer = htonl(ourgamestruct->desc.dwMaxPlayers);
buffer += sizeof(int32_t);
*(int32_t*)buffer = htonl(ourgamestruct->desc.dwCurrentPlayers);
buffer += sizeof(int32_t);
for (i = 0; i < ARRAY_SIZE(ourgamestruct->desc.dwUserFlags); ++i)
{
*(int32_t*)buffer = htonl(ourgamestruct->desc.dwUserFlags[i]);
buffer += sizeof(int32_t);
}
// Copy a string
for (i = 0; i <ARRAY_SIZE(ourgamestruct->secondaryHosts); ++i)
{
strlcpy(buffer, ourgamestruct->secondaryHosts[i], sizeof(ourgamestruct->secondaryHosts[i]));
buffer += sizeof(ourgamestruct->secondaryHosts[i]);
}
// Copy a string
strlcpy(buffer, ourgamestruct->extra, sizeof(ourgamestruct->extra));
buffer += sizeof(ourgamestruct->extra);
// Copy a string
strlcpy(buffer, ourgamestruct->mapname, sizeof(ourgamestruct->mapname));
buffer += sizeof(ourgamestruct->mapname);
// Copy a string
strlcpy(buffer, ourgamestruct->hostname, sizeof(ourgamestruct->hostname));
buffer += sizeof(ourgamestruct->hostname);
// Copy a string
strlcpy(buffer, ourgamestruct->versionstring, sizeof(ourgamestruct->versionstring));
buffer += sizeof(ourgamestruct->versionstring);
// Copy a string
strlcpy(buffer, ourgamestruct->modlist, sizeof(ourgamestruct->modlist));
buffer += sizeof(ourgamestruct->modlist);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->game_version_major);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->game_version_minor);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->privateGame);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->pureGame);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->Mods);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->gameId);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->future2);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->future3);
buffer += sizeof(uint32_t);
// Copy 32bit large big endian numbers
*(uint32_t*)buffer = htonl(ourgamestruct->future4);
buffer += sizeof(uint32_t);
debug(LOG_NET, "sending GAMESTRUCT, size: %u", (unsigned int)sizeof(buf));
// Send over the GAMESTRUCT
result = writeAll(sock, buf, sizeof(buf));
if (result == SOCKET_ERROR)
{
const int err = getSockErr();
// If packet could not be sent, we should inform user of the error.
debug(LOG_ERROR, "Failed to send GAMESTRUCT. Reason: %s", strSockError(getSockErr()));
debug(LOG_ERROR, "Please make sure TCP ports %u & %u are open!", masterserver_port, gameserver_port);
setSockErr(err);
return false;
}
return true;
}
/**
* @note \c game is being retrieved from the master server (if browsing the
* lobby). The implementation of NETrecvGAMESTRUCT should assume the data
* to be packed in network byte order (big-endian).
*
* @see GAMESTRUCT,NETsendGAMESTRUCT
*/
static bool NETrecvGAMESTRUCT(GAMESTRUCT* ourgamestruct)
{
// A buffer that's guaranteed to have the correct size (i.e. it
// circumvents struct padding, which could pose a problem).
char buf[sizeof(ourgamestruct->GAMESTRUCT_VERSION) + sizeof(ourgamestruct->name) + sizeof(ourgamestruct->desc.host) + (sizeof(int32_t) * 8) +
sizeof(ourgamestruct->secondaryHosts) + sizeof(ourgamestruct->extra) + sizeof(ourgamestruct->mapname) + sizeof(ourgamestruct->hostname) + sizeof(ourgamestruct->versionstring) +
sizeof(ourgamestruct->modlist) + (sizeof(uint32_t) * 9) ] = { 0 };
char* buffer = buf;
unsigned int i;
ssize_t result = 0;
// Read a GAMESTRUCT from the connection
if (tcp_socket == NULL
|| socket_set == NULL
|| checkSockets(socket_set, NET_TIMEOUT_DELAY) <= 0
|| !socketReadReady(tcp_socket)
|| (result = readNoInt(tcp_socket, buf, sizeof(buf))) != sizeof(buf))
{
unsigned int time = SDL_GetTicks();
if (result == SOCKET_ERROR)
{
debug(LOG_ERROR, "Server socket (%p) ecountered error: %s", tcp_socket, strSockError(getSockErr()));
SocketSet_DelSocket(socket_set, tcp_socket); // mark it invalid
socketClose(tcp_socket);
tcp_socket = NULL;
return false;
}
i = result;
while (i < sizeof(buf) && SDL_GetTicks() < time + 2500)
{
result = readNoInt(tcp_socket, buf+i, sizeof(buf)-i);
if (result == SOCKET_ERROR
|| (result == 0 && socketReadDisconnected(tcp_socket)))
{
debug(LOG_ERROR, "Server socket (%p) ecountered error: %s", tcp_socket, strSockError(getSockErr()));
debug(LOG_ERROR, "GAMESTRUCT recv failed; received %u bytes out of %d", i, (int)sizeof(buf));
SocketSet_DelSocket(socket_set, tcp_socket); // mark it invalid
socketClose(tcp_socket);
tcp_socket = NULL;
return false;
}
i += result;
}
if (i != sizeof(buf))
{
debug(LOG_ERROR, "GAMESTRUCT recv size mismatch; received %u bytes; expecting %d", i, (int)sizeof(buf));
return false;
}
}
// Now dump the data into the game struct
// Copy 32bit large big endian numbers
ourgamestruct->GAMESTRUCT_VERSION = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
// Copy a string
sstrcpy(ourgamestruct->name, buffer);
buffer += sizeof(ourgamestruct->name);
// Copy 32bit large big endian numbers
ourgamestruct->desc.dwSize = ntohl(*(int32_t*)buffer);
buffer += sizeof(int32_t);
ourgamestruct->desc.dwFlags = ntohl(*(int32_t*)buffer);
buffer += sizeof(int32_t);
// Copy yet another string
sstrcpy(ourgamestruct->desc.host, buffer);
buffer += sizeof(ourgamestruct->desc.host);
// Copy 32bit large big endian numbers
ourgamestruct->desc.dwMaxPlayers = ntohl(*(int32_t*)buffer);
buffer += sizeof(int32_t);
ourgamestruct->desc.dwCurrentPlayers = ntohl(*(int32_t*)buffer);
buffer += sizeof(int32_t);
for (i = 0; i < ARRAY_SIZE(ourgamestruct->desc.dwUserFlags); ++i)
{
ourgamestruct->desc.dwUserFlags[i] = ntohl(*(int32_t*)buffer);
buffer += sizeof(int32_t);
}
// Copy a string
for (i = 0; i < ARRAY_SIZE(ourgamestruct->secondaryHosts); ++i)
{
sstrcpy(ourgamestruct->secondaryHosts[i], buffer);
buffer += sizeof(ourgamestruct->secondaryHosts[i]);
}
// Copy a string
sstrcpy(ourgamestruct->extra, buffer);
buffer += sizeof(ourgamestruct->extra);
// Copy a string
sstrcpy(ourgamestruct->mapname, buffer);
buffer += sizeof(ourgamestruct->mapname);
// Copy a string
sstrcpy(ourgamestruct->hostname, buffer);
buffer += sizeof(ourgamestruct->hostname);
// Copy a string
sstrcpy(ourgamestruct->versionstring, buffer);
buffer += sizeof(ourgamestruct->versionstring);
// Copy a string
sstrcpy(ourgamestruct->modlist, buffer);
buffer += sizeof(ourgamestruct->modlist);
// Copy 32bit large big endian numbers
ourgamestruct->game_version_major = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->game_version_minor = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->privateGame = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->pureGame = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->Mods = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->gameId = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->future2 = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->future3 = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
ourgamestruct->future4 = ntohl(*(uint32_t*)buffer);
buffer += sizeof(uint32_t);
// cat the modstring (if there is one) to the version string to display it for the end-user
if (ourgamestruct->modlist[0] != '\0')
{
ssprintf(ourgamestruct->versionstring, "%s, Mods:%s", ourgamestruct->versionstring, ourgamestruct->modlist);
}
debug(LOG_NET, "received GAMESTRUCT");
return true;
}
static int upnp_init(void *asdf)
{
struct UPNPDev *devlist;
struct UPNPDev *dev;
char *descXML;
int descXMLsize = 0;
char buf[255];
memset(&urls, 0, sizeof(struct UPNPUrls));
memset(&data, 0, sizeof(struct IGDdatas));
if (NetPlay.isUPNP)
{
debug(LOG_NET, "Searching for UPnP devices for automatic port forwarding...");
devlist = upnpDiscover(2000, NULL, NULL, 0);
debug(LOG_NET, "UPnP device search finished.");
if (devlist)
{
dev = devlist;
while (dev)
{
if (strstr(dev->st, "InternetGatewayDevice"))
break;
dev = dev->pNext;
}
if (!dev)
{
dev = devlist; /* defaulting to first device */
}
debug(LOG_NET, "UPnP device found: %s %s\n", dev->descURL, dev->st);
descXML = (char *)miniwget_getaddr(dev->descURL, &descXMLsize, lanaddr, sizeof(lanaddr));
debug(LOG_NET, "LAN address: %s", lanaddr);
if (descXML)
{
parserootdesc (descXML, descXMLsize, &data);
free (descXML); descXML = 0;
GetUPNPUrls (&urls, &data, dev->descURL);
}
ssprintf(buf, "UPnP device found: %s %s LAN address %s", dev->descURL, dev->st, lanaddr);
addDumpInfo(buf);
freeUPNPDevlist(devlist);
if (!urls.controlURL || urls.controlURL[0] == '\0')
{
ssprintf(buf, "controlURL not available, UPnP disabled");
addDumpInfo(buf);
return false;
}
return true;
}
ssprintf(buf, "UPnP device not found.");
addDumpInfo(buf);
debug(LOG_NET, "No UPnP devices found.");
return false;
}
else
{
ssprintf(buf, "UPnP detection routine disabled by user.");
addDumpInfo(buf);
debug(LOG_NET, "UPnP detection routine disabled by user.");
return false;
}
}
static bool upnp_add_redirect(int port)
{
char externalIP[16];
char port_str[16];
int r;
debug(LOG_NET, "upnp_add_redir(%d)\n", port);
UPNP_GetExternalIPAddress(urls.controlURL, data.servicetype, externalIP);
sprintf(port_str, "%d", port);
r = UPNP_AddPortMapping(urls.controlURL, data.servicetype,
port_str, port_str, lanaddr, "Warzone 2100", "TCP", 0);
if (r != UPNPCOMMAND_SUCCESS)
{
debug(LOG_NET, "AddPortMapping(%s, %s, %s) failed\n", port_str, port_str, lanaddr);
return false;
}
return true;
}
static void upnp_rem_redirect(int port)
{
char port_str[16];
debug(LOG_NET, "upnp_rem_redir(%d)", port);
sprintf(port_str, "%d", port);
UPNP_DeletePortMapping(urls.controlURL, data.servicetype, port_str, "TCP", 0);
}
void NETaddRedirects(void)
{
debug(LOG_NET, "%s\n", __FUNCTION__);
if (!upnp_done)
{
SDL_WaitThread(upnpdiscover, &upnp);
upnp_done = true;
}
if (upnp) {
upnp_add_redirect(gameserver_port);
}
}
void NETremRedirects(void)
{
debug(LOG_NET, "%s\n", __FUNCTION__);
if (upnp)
{
upnp_rem_redirect(gameserver_port);
}
}
void NETdiscoverUPnPDevices(void)
{
upnpdiscover = SDL_CreateThread(&upnp_init, NULL);
}
// ////////////////////////////////////////////////////////////////////////
// setup stuff
int NETinit(BOOL bFirstCall)
{
debug(LOG_NET, "NETinit");
NETlogEntry("NETinit!", SYNC_FLAG, selectedPlayer);
NET_InitPlayers();
SOCKETinit();
if(bFirstCall)
{
debug(LOG_NET, "NETPLAY: Init called, MORNIN'");
memset(&NetPlay.games, 0, sizeof(NetPlay.games));
// NOTE NetPlay.isUPNP is already set in configuration.c!
NetPlay.bComms = true;
NetPlay.GamePassworded = false;
NetPlay.ShowedMOTD = false;
NetPlay.isHostAlive = false;
NetPlay.gamePassword[0] = '\0';
NetPlay.MOTD = strdup("");
sstrcpy(NetPlay.gamePassword,_("Enter password here"));
NETstartLogging();
}
NetPlay.ShowedMOTD = false;
NetPlay.GamePassworded = false;
memset(&sync_counter, 0x0, sizeof(sync_counter)); //clear counters
return 0;
}
// ////////////////////////////////////////////////////////////////////////
// SHUTDOWN THE CONNECTION.
int NETshutdown(void)
{
debug( LOG_NET, "NETshutdown" );
NETlogEntry("NETshutdown", SYNC_FLAG, selectedPlayer);
NETstopLogging();
if (IPlist)
free(IPlist);
IPlist = NULL;
SOCKETshutdown();
if (NetPlay.bComms && NetPlay.isUPNP)
{
NETremRedirects();
}
return 0;
}
// ////////////////////////////////////////////////////////////////////////
//close the open game..
int NETclose(void)
{
unsigned int i;
// reset flag
NetPlay.ShowedMOTD = false;
NEThaltJoining();
debug(LOG_NET, "Terminating sockets.");
NetPlay.isHost = false;
server_not_there = false;
allow_joining = false;
if(bsocket)
{ // need SocketSet_DelSocket() as well, socket_set or tmp_socket_set?
debug(LOG_NET, "Closing bsocket %p socket %p (tcp_socket=%p)", bsocket, bsocket, tcp_socket);
//socketClose(bsocket);
bsocket=NULL;
}
for(i = 0; i < MAX_CONNECTED_PLAYERS; i++)
{
if (connected_bsocket[i])
{
debug(LOG_NET, "Closing connected_bsocket[%u], %p", i, connected_bsocket[i]);
socketClose(connected_bsocket[i]);
connected_bsocket[i]=NULL;
}
NET_DestroyPlayer(i);
}
if (tmp_socket_set)
{
debug(LOG_NET, "Freeing tmp_socket_set %p", tmp_socket_set);
deleteSocketSet(tmp_socket_set);
tmp_socket_set=NULL;
}
for (i = 0; i < MAX_TMP_SOCKETS; i++)
{
if (tmp_socket[i])
{
// FIXME: need SocketSet_DelSocket() as well, socket_set or tmp_socket_set?
debug(LOG_NET, "Closing tmp_socket[%d] %p", i, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i]=NULL;
}
}
if (socket_set)
{
// checking to make sure tcp_socket is still valid
if (tcp_socket)
{
SocketSet_DelSocket(socket_set, tcp_socket);
}
debug(LOG_NET, "Freeing socket_set %p", socket_set);
deleteSocketSet(socket_set);
socket_set=NULL;
}
if (tcp_socket)
{
debug(LOG_NET, "Closing tcp_socket %p", tcp_socket);
socketClose(tcp_socket);
tcp_socket=NULL;
}
return 0;
}
// ////////////////////////////////////////////////////////////////////////
// ////////////////////////////////////////////////////////////////////////
// Send and Recv functions
// ////////////////////////////////////////////////////////////////////////
// return bytes of data sent recently.
UDWORD NETgetBytesSent(void)
{
static UDWORD lastsec=0;
static UDWORD timy=0;
if( (UDWORD)clock() > (timy+CLOCKS_PER_SEC) )
{
timy = clock();
lastsec = nStats.bytesSent;
nStats.bytesSent = 0;
}
return lastsec;
}
UDWORD NETgetRecentBytesSent(void)
{
return nStats.bytesSent;
}
UDWORD NETgetBytesRecvd(void)
{
static UDWORD lastsec=0;
static UDWORD timy=0;
if( (UDWORD)clock() > (timy+CLOCKS_PER_SEC) )
{
timy = clock();
lastsec = nStats.bytesRecvd;
nStats.bytesRecvd = 0;
}
return lastsec;
}
UDWORD NETgetRecentBytesRecvd(void)
{
return nStats.bytesRecvd;
}
//return number of packets sent last sec.
UDWORD NETgetPacketsSent(void)
{
static UDWORD lastsec=0;
static UDWORD timy=0;
if( (UDWORD)clock() > (timy+CLOCKS_PER_SEC) )
{
timy = clock();
lastsec = nStats.packetsSent;
nStats.packetsSent = 0;
}
return lastsec;
}
UDWORD NETgetRecentPacketsSent(void)
{
return nStats.packetsSent;
}
UDWORD NETgetPacketsRecvd(void)
{
static UDWORD lastsec=0;
static UDWORD timy=0;
if( (UDWORD)clock() > (timy+CLOCKS_PER_SEC) )
{
timy = clock();
lastsec = nStats.packetsRecvd;
nStats.packetsRecvd = 0;
}
return lastsec;
}
// ////////////////////////////////////////////////////////////////////////
// Send a message to a player, option to guarantee message
bool NETsend(uint8_t player, NetMessage const *message)
{
ssize_t result = 0;
if(!NetPlay.bComms)
{
return true;
}
if (player >= MAX_CONNECTED_PLAYERS && player != NET_ALL_PLAYERS) return false;
if (NetPlay.isHost)
{
int firstPlayer = player == NET_ALL_PLAYERS ? 0 : player;
int lastPlayer = player == NET_ALL_PLAYERS ? MAX_CONNECTED_PLAYERS - 1 : player;
for (player = firstPlayer; player <= lastPlayer; ++player)
{
// We are the host, send directly to player.
if (connected_bsocket[player] != NULL)
{
uint8_t *rawData = message->rawDataDup();
ssize_t rawLen = message->rawLen();
result = writeAll(connected_bsocket[player], rawData, rawLen);
delete[] rawData; // Done with the data.
if (result == rawLen)
{
nStats.bytesSent += rawLen;
nStats.packetsSent += 1;
}
else if (result == SOCKET_ERROR)
{
// Write error, most likely client disconnect.
debug(LOG_ERROR, "Failed to send message: %s", strSockError(getSockErr()));
NETlogEntry("client disconnect?", SYNC_FLAG, player);
NETplayerClientDisconnect(player);
}
}
}
return true;
}
else if (player == NetPlay.hostPlayer)
{
// We are a client, send directly to player, who happens to be the host.
if (tcp_socket)
{
uint8_t *rawData = message->rawDataDup();
ssize_t rawLen = message->rawLen();
result = writeAll(tcp_socket, rawData, rawLen);
delete[] rawData; // Done with the data.
if (result == rawLen)
{
nStats.bytesSent += rawLen;
nStats.packetsSent += 1;
}
else if (result == SOCKET_ERROR)
{
// Write error, most likely host disconnect.
debug(LOG_ERROR, "Failed to send message: %s", strSockError(getSockErr()));
debug(LOG_ERROR, "Host connection was broken, socket %p.", tcp_socket);
NETlogEntry("write error--client disconnect.", SYNC_FLAG, player);
SocketSet_DelSocket(socket_set, tcp_socket); // mark it invalid
socketClose(tcp_socket);
tcp_socket = NULL;
bsocket = NULL; // Because tcp_socket == bsocket...
NetPlay.players[NetPlay.hostPlayer].heartbeat = false; // mark host as dead
//Game is pretty much over --should just end everything when HOST dies.
NetPlay.isHostAlive = false;
}
return result == rawLen;
}
}
else
{
// We are a client and can't send the data directly, ask the host to send the data to the player.
uint8_t sender = selectedPlayer;
NETbeginEncode(NETnetQueue(NET_HOST_ONLY), NET_SEND_TO_PLAYER);
NETuint8_t(&sender);
NETuint8_t(&player);
NETnetMessage(&message);
NETend();
}
return false;
}
void NETflush()
{
if (!NetPlay.bComms)
{
return;
}
NETflushGameQueues();
if (NetPlay.isHost)
{
int player;
for (player = 0; player < MAX_CONNECTED_PLAYERS; ++player)
{
// We are the host, send directly to player.
if (connected_bsocket[player] != NULL)
{
socketFlush(connected_bsocket[player]);
}
}
}
else
{
if (bsocket != NULL)
{
socketFlush(bsocket);
}
}
}
///////////////////////////////////////////////////////////////////////////
// Check if a message is a system message
static BOOL NETprocessSystemMessage(NETQUEUE playerQueue, uint8_t type)
{
switch (type)
{
case NET_SEND_TO_PLAYER:
{
uint8_t sender;
uint8_t receiver;
NetMessage const *message = NULL;
NETbeginDecode(playerQueue, NET_SEND_TO_PLAYER);
NETuint8_t(&sender);
NETuint8_t(&receiver);
NETnetMessage(&message); // Must delete message later.
std::auto_ptr<NetMessage const> deleteLater(message);
if (!NETend())
{
debug(LOG_ERROR, "Incomplete NET_SEND_TO_PLAYER.");
break;
}
if ((receiver == selectedPlayer || receiver == NET_ALL_PLAYERS) && playerQueue.index == NetPlay.hostPlayer)
{
// Message was sent to us via the host.
if (sender != selectedPlayer) // TODO Tell host not to send us our own broadcast messages.
{
NETinsertMessageFromNet(NETnetQueue(sender), message);
}
}
else if (NetPlay.isHost && sender == playerQueue.index)
{
// We are the host, and player is asking us to send the message to receiver.
NETbeginEncode(NETnetQueue(receiver), NET_SEND_TO_PLAYER);
NETuint8_t(&sender);
NETuint8_t(&receiver);
NETnetMessage(&message);
NETend();
if (receiver == NET_ALL_PLAYERS)
{
NETinsertMessageFromNet(NETnetQueue(sender), message); // Message is also for the host.
// Not sure if flushing here can make a difference, maybe it can:
//NETflush(); // Send the message to everyone as fast as possible.
}
}
else
{
debug(LOG_ERROR, "Player %d sent us a NET_SEND_TO_PLAYER addressed to %d from %d. We are %d.", playerQueue.index, receiver, sender, selectedPlayer);
}
break;
}
case NET_SHARE_GAME_QUEUE:
{
uint8_t player = 0;
uint32_t num = 0, n;
NetMessage const *message = NULL;
// Encoded in NETprocessSystemMessage in nettypes.cpp.
NETbeginDecode(playerQueue, NET_SHARE_GAME_QUEUE);
NETuint8_t(&player);
NETuint32_t(&num);
for (n = 0; n < num; ++n)
{
NETnetMessage(&message);
// TODO Check that playerQueue is actually responsible for this game queue.
NETinsertMessageFromNet(NETgameQueue(player), message);
delete message;
message = NULL;
}
if (!NETend() || player > MAX_PLAYERS)
{
debug(LOG_ERROR, "Bad NET_SHARE_GAME_QUEUE message.");
break;
}
break;
}
case NET_PLAYER_STATS:
{
recvMultiStats(playerQueue);
netPlayersUpdated = true;
break;
}
case NET_PLAYER_INFO:
{
uint32_t indexLen = 0, n;
uint32_t index = MAX_PLAYERS;
int32_t colour = 0;
int32_t position = 0;
int32_t team = 0;
int8_t ai = 0;
int8_t difficulty = 0;
uint8_t skDiff = 0;
bool error = false;
NETbeginDecode(playerQueue, NET_PLAYER_INFO);
NETuint32_t(&indexLen);
if (indexLen > MAX_PLAYERS || (playerQueue.index != NET_HOST_ONLY && indexLen > 1))
{
debug(LOG_ERROR, "MSG_PLAYER_INFO: Bad number of players updated");
NETend();
break;
}
for (n = 0; n < indexLen; ++n)
{
bool wasAllocated = false;
char oldName[sizeof(NetPlay.players[index].name)];
// Retrieve the player's ID
NETuint32_t(&index);
// Bail out if the given ID number is out of range
if (index >= MAX_CONNECTED_PLAYERS || (playerQueue.index != NetPlay.hostPlayer && (playerQueue.index != index || !NetPlay.players[index].allocated)))
{
debug(LOG_ERROR, "MSG_PLAYER_INFO from %u: Player ID (%u) out of range (max %u)", playerQueue.index, index, (unsigned int)MAX_CONNECTED_PLAYERS);
error = true;
break;
}
// Retrieve the rest of the data
wasAllocated = NetPlay.players[index].allocated;
NETbool(&NetPlay.players[index].allocated);
NETbool(&NetPlay.players[index].heartbeat);
NETbool(&NetPlay.players[index].kick);
strncpy(oldName, NetPlay.players[index].name, sizeof(NetPlay.players[index].name));
NETstring(NetPlay.players[index].name, sizeof(NetPlay.players[index].name));
NETuint32_t(&NetPlay.players[index].heartattacktime);
NETint32_t(&colour);
NETint32_t(&position);
NETint32_t(&team);
NETbool(&NetPlay.players[index].ready);
NETint8_t(&ai);
NETint8_t(&difficulty);
NETuint8_t(&skDiff);
// Don't let anyone except the host change these, otherwise it will end up inconsistent at some point, and the game gets really messed up.
if (playerQueue.index == NetPlay.hostPlayer)
{
NetPlay.players[index].colour = colour;
NetPlay.players[index].position = position;
NetPlay.players[index].team = team;
NetPlay.players[index].ai = ai;
NetPlay.players[index].difficulty = difficulty;
game.skDiff[index] = skDiff; // This one might be possible to calculate from the other values. // TODO game.skDiff should probably be eliminated somehow.
}
debug(LOG_NET, "%s for player %u (%s)", n == 0? "Receiving MSG_PLAYER_INFO" : " and", (unsigned int)index, NetPlay.players[index].allocated ? "human" : "AI");
// update the color to the local array
setPlayerColour(index, NetPlay.players[index].colour);
if (wasAllocated && NetPlay.players[index].allocated && strncmp(oldName, NetPlay.players[index].name, sizeof(NetPlay.players[index].name)) != 0)
{
printConsoleNameChange(oldName, NetPlay.players[index].name);
}
}
NETend();
// If we're the game host make sure to send the updated
// data to all other clients as well.
if (NetPlay.isHost && !error)
{
NETBroadcastPlayerInfo(index);
NETfixDuplicatePlayerNames();
}
netPlayersUpdated = true;
break;
}
case NET_PLAYER_JOINED:
{
uint8_t index;
NETbeginDecode(playerQueue, NET_PLAYER_JOINED);
NETuint8_t(&index);
NETend();
debug(LOG_NET, "Receiving NET_PLAYER_JOINED for player %u using socket %p",
(unsigned int)index, tcp_socket);
MultiPlayerJoin(index);
netPlayersUpdated = true;
break;
}
// This message type is when player is leaving 'nicely', and socket is still valid.
case NET_PLAYER_LEAVING:
{
uint32_t index;
NETbeginDecode(playerQueue, NET_PLAYER_LEAVING);
NETuint32_t(&index);
NETend();
if (playerQueue.index != NetPlay.hostPlayer && index != playerQueue.index)
{
debug(LOG_ERROR, "Player %d left, but accidentally set player %d as leaving.", playerQueue.index, index);
index = playerQueue.index;
}
if(connected_bsocket[index])
{
debug(LOG_NET, "Receiving NET_PLAYER_LEAVING for player %u on socket %p", (unsigned int)index, connected_bsocket[index]);
}
else
{ // dropped from join screen most likely
debug(LOG_NET, "Receiving NET_PLAYER_LEAVING for player %u (no socket?)", (unsigned int)index);
}
if (NetPlay.isHost)
{
debug(LOG_NET, "Broadcast leaving message to everyone else");
NETbeginEncode(NETbroadcastQueue(), NET_PLAYER_LEAVING);
{
BOOL host = NetPlay.isHost;
uint32_t id = index;
NETuint32_t(&id);
NETbool(&host);
}
NETend();
}
debug(LOG_INFO, "Player %u has left the game.", index);
NETplayerLeaving(index); // need to close socket for the player that left.
NETsetPlayerConnectionStatus(CONNECTIONSTATUS_PLAYER_LEAVING, index);
break;
}
case NET_GAME_FLAGS:
{
debug(LOG_NET, "Receiving game flags");
NETbeginDecode(playerQueue, NET_GAME_FLAGS);
{
static unsigned int max_flags = ARRAY_SIZE(NetGameFlags);
// Retrieve the amount of game flags that we should receive
uint8_t i, count;
NETuint8_t(&count);
// Make sure that we won't get buffer overflows by checking that we
// have enough space to store the given amount of game flags.
if (count > max_flags)
{
debug(LOG_NET, "NET_GAME_FLAGS: More game flags sent (%u) than our buffer can hold (%u)", (unsigned int)count, max_flags);
count = max_flags;
}
// Retrieve all game flags
for (i = 0; i < count; ++i)
{
NETint32_t(&NetGameFlags[i]);
}
}
NETend();
if (NetPlay.isHost)
{
NETsendGameFlags();
}
break;
}
case NET_DEBUG_SYNC:
{
recvDebugSync(playerQueue);
break;
}
default:
return false;
}
NETpop(playerQueue);
return true;
}
/*
* Checks to see if a human player is still with us.
* @note: resuscitation isn't possible with current code, so once we lose
* the socket, then we have no way to connect with them again. Future
* item to enhance.
*/
static void NETcheckPlayers(void)
{
int i;
for (i = 0; i< MAX_PLAYERS ; i++)
{
if (NetPlay.players[i].allocated == 0) continue; // not allocated means that it most like it is a AI player
if (NetPlay.players[i].heartbeat == 0 && NetPlay.players[i].heartattacktime == 0) // looks like they are dead
{
NetPlay.players[i].heartattacktime = gameTime2; // mark when this occured
}
else
{
if (NetPlay.players[i].heartattacktime)
{
if (NetPlay.players[i].heartattacktime + (15 * GAME_TICKS_PER_SEC) < gameTime2) // wait 15 secs
{
debug(LOG_NET, "Kicking due to client heart attack");
NetPlay.players[i].kick = true; // if still dead, then kick em.
}
}
}
if (NetPlay.players[i].kick)
{
debug(LOG_NET, "Kicking player %d", i);
NETplayerDropped(i);
}
}
}
// ////////////////////////////////////////////////////////////////////////
// Receive a message over the current connection. We return true if there
// is a message for the higher level code to process, and false otherwise.
// We should not block here.
BOOL NETrecvNet(NETQUEUE *queue, uint8_t *type)
{
uint32_t current;
if (!NetPlay.bComms)
{
return false;
}
if (NetPlay.isHost)
{
NETallowJoining();
}
NETcheckPlayers(); // make sure players are still alive & well
if (socket_set == NULL || checkSockets(socket_set, NET_READ_TIMEOUT) <= 0)
{
goto checkMessages;
}
for (current = 0; current < MAX_CONNECTED_PLAYERS; ++current)
{
Socket **pSocket = NetPlay.isHost ? &connected_bsocket[current] : &bsocket;
uint8_t buffer[NET_BUFFER_SIZE];
size_t dataLen;
if (!NetPlay.isHost && current != NET_HOST_ONLY)
{
continue; // Don't have a socket open to this player.
}
if (*pSocket == NULL)
{
continue;
}
dataLen = NET_fillBuffer(pSocket, socket_set, buffer, sizeof(buffer));
if (dataLen > 0)
{
// we received some data, add to buffer
NETinsertRawData(NETnetQueue(current), buffer, dataLen);
}
else if (*pSocket == NULL)
{
// If there is a error in NET_fillBuffer() then socket is already invalid.
// This means that the player dropped / disconnected for whatever reason.
debug(LOG_INFO, "Player, (player %u) seems to have dropped/disconnected.", (unsigned)current);
if (NetPlay.isHost)
{
// Send message type specifically for dropped / disconnects
NETplayerDropped(current);
NetPlay.players[current].kick = true; // they are going to get kicked.
}
}
}
checkMessages:
for (current = 0; current < MAX_CONNECTED_PLAYERS; ++current)
{
*queue = NETnetQueue(current);
while (NETisMessageReady(*queue))
{
*type = NETgetMessage(*queue)->type;
if (!NETprocessSystemMessage(*queue, *type))
{
return true; // We couldn't process the message, let the caller deal with it..
}
}
}
//NETlogPacket(pMsg, true);
return false;
}
BOOL NETrecvGame(NETQUEUE *queue, uint8_t *type)
{
uint32_t current;
for (current = 0; current < MAX_PLAYERS; ++current)
{
*queue = NETgameQueue(current);
while (!checkPlayerGameTime(current) && NETisMessageReady(*queue)) // Check for any messages that are scheduled to be read now.
{
*type = NETgetMessage(*queue)->type;
if (*type == GAME_GAME_TIME)
{
recvPlayerGameTime(*queue);
NETpop(*queue);
continue;
}
if (!NETprocessSystemMessage(*queue, *type))
{
return true; // We couldn't process the message, let the caller deal with it..
}
else
{
debug(LOG_ERROR, "There was a system message in a game queue...");
}
}
if (!checkPlayerGameTime(current))
{
break; // Still waiting for messages from this player, and all players should process messages in the same order.
}
}
return false;
}
// ////////////////////////////////////////////////////////////////////////
// ////////////////////////////////////////////////////////////////////////
// Protocol functions
BOOL NETsetupTCPIP(const char *machine)
{
debug(LOG_NET, "NETsetupTCPIP(%s)", machine ? machine : "NULL");
if ( hostname != NULL
&& hostname != masterserver_name)
{
free(hostname);
}
if ( machine != NULL
&& machine[0] != '\0')
{
hostname = strdup(machine);
} else {
hostname = masterserver_name;
}
return true;
}
// ////////////////////////////////////////////////////////////////////////
// File Transfer programs.
/** Send file. It returns % of file sent when 100 it's complete. Call until it returns 100.
* @TODO: more error checking (?) different file types (?)
* Maybe should close file handle, and seek each time?
*
* @NOTE: MAX_FILE_TRANSFER_PACKET is set to 2k per packet since 7*2 = 14K which is pretty
* much our limit. Don't screw with that without having a bigger buffer!
* NET_BUFFER_SIZE is at 16k. (also remember text chat, plus all the other cruff)
*/
#define MAX_FILE_TRANSFER_PACKET 2048
UBYTE NETsendFile(char *fileName, UDWORD player)
{
uint32_t bytesToRead = 0;
uint8_t sendto = 0;
uint8_t inBuff[MAX_FILE_TRANSFER_PACKET];
// We are not the host, so we don't care. (in fact, this would be a error)
if (!NetPlay.isHost)
{
debug(LOG_ERROR, "trying to send a file and we are not the host!");
return true;
}
memset(inBuff, 0x0, sizeof(inBuff));
// read some bytes.
bytesToRead = PHYSFS_read(NetPlay.players[player].wzFile.pFileHandle, inBuff, 1, MAX_FILE_TRANSFER_PACKET);
ASSERT_OR_RETURN(100, (int32_t)bytesToRead >= 0, "Error reading file.");
sendto = (uint8_t) player;
NETbeginEncode(NETnetQueue(sendto), NET_FILE_PAYLOAD);
NETint32_t(&NetPlay.players[player].wzFile.fileSize_32); // total bytes in this file. (we don't support 64bit yet)
NETuint32_t(&bytesToRead); // bytes in this packet
NETint32_t(&NetPlay.players[player].wzFile.currPos); // start byte
NETstring(fileName, 256); //256 = max filename size
NETbin(inBuff, bytesToRead);
NETend();
NetPlay.players[player].wzFile.currPos += bytesToRead; // update position!
if(NetPlay.players[player].wzFile.currPos == NetPlay.players[player].wzFile.fileSize_32)
{
PHYSFS_close(NetPlay.players[player].wzFile.pFileHandle);
NetPlay.players[player].wzFile.isSending = false; // we are done sending to this client.
NetPlay.players[player].needFile = false;
}
return (NetPlay.players[player].wzFile.currPos * 100) / NetPlay.players[player].wzFile.fileSize_32;
}
/* @TODO more error checking (?) different file types (?) */
// recv file. it returns % of the file so far recvd.
UBYTE NETrecvFile(NETQUEUE queue)
{
uint32_t bytesToRead = 0;
int32_t fileSize = 0, currPos = 0;
char fileName[256];
uint8_t outBuff[MAX_FILE_TRANSFER_PACKET];
static bool isLoop = false;
memset(fileName, 0x0, sizeof(fileName));
memset(outBuff, 0x0, sizeof(outBuff));
//read incoming bytes.
NETbeginDecode(queue, NET_FILE_PAYLOAD);
NETint32_t(&fileSize); // total bytes in this file.
NETuint32_t(&bytesToRead); // bytes in this packet
NETint32_t(&currPos); // start byte
NETstring(fileName, 256); // read filename (only valid on 1st packet)
debug(LOG_NET, "Creating new file %s, position is %d", fileName, currPos);
if (currPos == 0) // first packet!
{
if (PHYSFS_exists(fileName))
{
PHYSFS_file *fin;
PHYSFS_sint64 fsize;
fin = PHYSFS_openRead(fileName);
if (!fin)
{
// the file exists, but we can't open it, and I have no clue how to fix this...
debug(LOG_FATAL, "PHYSFS_openRead(\"%s\") failed with error: %s\n", fileName, PHYSFS_getLastError());
debug(LOG_NET, "We are leaving 'nicely' after a fatal error");
NETbeginEncode(NETnetQueue(NET_HOST_ONLY), NET_PLAYER_LEAVING);
{
BOOL host = NetPlay.isHost;
uint32_t id = selectedPlayer;
NETuint32_t(&id);
NETbool(&host);
}
NETend();
abort();
}
else
{
fsize = PHYSFS_fileLength(fin);
}
if ((int32_t) fsize == fileSize)
{
uint32_t reason = ALREADY_HAVE_FILE;
debug(LOG_NET, "We already have the file %s! ", fileName);
PHYSFS_close(fin);
NETend();
NETbeginEncode(NETnetQueue(NET_HOST_ONLY), NET_FILE_CANCELLED);
NETuint32_t(&selectedPlayer);
NETuint32_t(&reason);
NETend();
if (!isLoop)
{
isLoop = true;
}
else
{
uint32_t reason = STUCK_IN_FILE_LOOP;
NETend();
// we should never get here, it means, that the game can't detect the level, but we have the file.
// so we kick this player out.
NETbeginEncode(NETnetQueue(NET_HOST_ONLY), NET_FILE_CANCELLED);
NETuint32_t(&selectedPlayer);
NETuint32_t(&reason);
NETend();
PHYSFS_close(NetPlay.pMapFileHandle);
NetPlay.pMapFileHandle = NULL;
debug(LOG_FATAL, "Something is really wrong with the file's (%s) data, game can't detect it?", fileName);
return 100;
}
}
PHYSFS_close(fin);
debug(LOG_NET, "We already have the file %s, but different size %d vs %d. Redownloading", fileName, (int32_t) fsize, fileSize);
}
NetPlay.pMapFileHandle = PHYSFS_openWrite(fileName); // create a new file.
}
if (!NetPlay.pMapFileHandle) // file can't be opened
{
debug(LOG_FATAL, "Fatal error while creating file: %s", PHYSFS_getLastError());
debug(LOG_FATAL, "Either we do not have write permission, or the host sent us a invalid file (%s)!", fileName);
abort();
}
if (bytesToRead > sizeof(outBuff))
{
debug(LOG_ERROR, "Error receiving file from host.");
NETend();
return 100;
}
NETbin(outBuff, bytesToRead);
NETend();
//write packet to the file.
PHYSFS_write(NetPlay.pMapFileHandle, outBuff, bytesToRead, 1);
if (currPos + bytesToRead == fileSize) // last packet
{
PHYSFS_close(NetPlay.pMapFileHandle);
NetPlay.pMapFileHandle = NULL;
}
//return the percentage count
return ((currPos + bytesToRead) * 100) / fileSize;
}
static ssize_t readLobbyResponse(Socket* sock, unsigned int timeout)
{
uint32_t lobbyStatusCode;
uint32_t MOTDLength;
uint32_t buffer[2];
ssize_t result, received = 0;
// Get status and message length
result = readAll(sock, &buffer, sizeof(buffer), timeout);
if (result != sizeof(buffer))
goto error;
received += result;
lobbyStatusCode = ntohl(buffer[0]);
MOTDLength = ntohl(buffer[1]);
// Get status message
free(NetPlay.MOTD);
NetPlay.MOTD = (char *)malloc(MOTDLength + 1);
result = readAll(sock, NetPlay.MOTD, MOTDLength, timeout);
if (result != MOTDLength)
goto error;
received += result;
// NUL terminate string
NetPlay.MOTD[MOTDLength] = '\0';
if (lobbyStatusCode / 100 != 2) // Check whether status code is 2xx (success)
{
debug(LOG_ERROR, "Lobby error (%u): %s", (unsigned int)lobbyStatusCode, NetPlay.MOTD);
return received;
}
debug(LOG_NET, "Lobby success (%u): %s", (unsigned int)lobbyStatusCode, NetPlay.MOTD);
return received;
error:
if (result == SOCKET_ERROR)
{
free(NetPlay.MOTD);
if (asprintf(&NetPlay.MOTD, "Error while connecting to the lobby server: %s\nMake sure port %d can receive incoming connections.", strSockError(getSockErr()), gameserver_port) == -1)
NetPlay.MOTD = NULL;
debug(LOG_ERROR, "%s", NetPlay.MOTD);
}
else
{
free(NetPlay.MOTD);
if (asprintf(&NetPlay.MOTD, "Disconnected from lobby server. Failed to register game.") == -1)
NetPlay.MOTD = NULL;
debug(LOG_ERROR, "%s", NetPlay.MOTD);
}
return SOCKET_ERROR;
}
static void NETregisterServer(int state)
{
static Socket* rs_socket = NULL;
static int registered = 0;
if (server_not_there)
{
return;
}
if (state != registered)
{
switch(state)
{
// Update player counts
case 2:
{
if (!NETsendGAMESTRUCT(rs_socket, &gamestruct))
{
socketClose(rs_socket);
rs_socket = NULL;
}
}
break;
// Register a game with the lobby
case 1:
{
uint32_t gameId = 0;
SocketAddress *const hosts = resolveHost(masterserver_name, masterserver_port);
if (hosts == NULL)
{
debug(LOG_ERROR, "Cannot resolve masterserver \"%s\": %s", masterserver_name, strSockError(getSockErr()));
free(NetPlay.MOTD);
if (asprintf(&NetPlay.MOTD, _("Could not resolve masterserver name (%s)!"), masterserver_name) == -1)
NetPlay.MOTD = NULL;
server_not_there = true;
return;
}
// Close an existing socket.
if (rs_socket != NULL)
{
socketClose(rs_socket);
rs_socket = NULL;
}
// try each address from resolveHost until we successfully connect.
rs_socket = socketOpenAny(hosts, 1500);
deleteSocketAddress(hosts);
// No address succeeded.
if (rs_socket == NULL)
{
debug(LOG_ERROR, "Cannot connect to masterserver \"%s:%d\": %s", masterserver_name, masterserver_port, strSockError(getSockErr()));
free(NetPlay.MOTD);
if (asprintf(&NetPlay.MOTD, _("Could not communicate with lobby server! Is TCP port %u open for outgoing traffic?"), masterserver_port) == -1)
NetPlay.MOTD = NULL;
server_not_there = true;
return;
}
// Get a game ID
if (writeAll(rs_socket, "gaId", sizeof("gaId")) == SOCKET_ERROR
|| readAll(rs_socket, &gameId, sizeof(gameId), 10000) != sizeof(gameId))
{
free(NetPlay.MOTD);
if (asprintf(&NetPlay.MOTD, "Failed to retrieve a game ID: %s", strSockError(getSockErr())) == -1)
NetPlay.MOTD = NULL;
debug(LOG_ERROR, "%s", NetPlay.MOTD);
// The socket has been invalidated, so get rid of it. (using them now may cause SIGPIPE).
socketClose(rs_socket);
rs_socket = NULL;
server_not_there = true;
return;
}
gamestruct.gameId = ntohl(gameId);
debug(LOG_NET, "Using game ID: %u", (unsigned int)gamestruct.gameId);
// Register our game with the server
if (writeAll(rs_socket, "addg", sizeof("addg")) == SOCKET_ERROR
// and now send what the server wants
|| !NETsendGAMESTRUCT(rs_socket, &gamestruct))
{
debug(LOG_ERROR, "Failed to register game with server: %s", strSockError(getSockErr()));
socketClose(rs_socket);
rs_socket = NULL;
}
if (readLobbyResponse(rs_socket, NET_TIMEOUT_DELAY) == SOCKET_ERROR)
{
socketClose(rs_socket);
rs_socket = NULL;
return;
}
// Preserves another register
registered=state;
}
break;
// Unregister the game (close the socket)
case 0:
{
if (rs_socket != NULL)
{
// we don't need this anymore, so clean up
socketClose(rs_socket);
rs_socket = NULL;
server_not_there = true;
}
// Preserves another unregister
registered=state;
}
break;
}
}
}
// ////////////////////////////////////////////////////////////////////////
// Host a game with a given name and player name. & 4 user game flags
static void NETallowJoining(void)
{
unsigned int i;
UDWORD numgames = htonl(1); // always 1 on normal server
char buffer[5];
ssize_t recv_result = 0;
if (allow_joining == false) return;
ASSERT(NetPlay.isHost, "Cannot receive joins if not host!");
NETregisterServer(1);
// This is here since we need to get the status, before we can show the info.
// FIXME: find better location to stick this?
if (!NetPlay.ShowedMOTD)
{
ShowMOTD();
NetPlay.ShowedMOTD = true;
}
if (tmp_socket_set == NULL)
{
// initialize server socket set
// FIXME: why is this not done in NETinit()?? - Per
tmp_socket_set = allocSocketSet();
if (tmp_socket_set == NULL)
{
debug(LOG_ERROR, "Cannot create socket set: %s", strSockError(getSockErr()));
return;
}
}
// Find the first empty socket slot
for (i = 0; i < MAX_TMP_SOCKETS; ++i)
{
if (tmp_socket[i] == NULL)
{
break;
}
}
if (i == MAX_TMP_SOCKETS)
{
// this should *never* happen, it would mean we are going to reuse a socket already in use.
debug(LOG_ERROR, "all temp sockets are used up!");
return;
}
// See if there's an incoming connection
if (tmp_socket[i] == NULL // Make sure that we're not out of sockets
&& (tmp_socket[i] = socketAccept(tcp_socket)) != NULL)
{
NETinitQueue(NETnetTmpQueue(i));
SocketSet_AddSocket(tmp_socket_set, tmp_socket[i]);
if (checkSockets(tmp_socket_set, NET_TIMEOUT_DELAY) > 0
&& socketReadReady(tmp_socket[i])
&& (recv_result = readNoInt(tmp_socket[i], buffer, 5))
&& recv_result != SOCKET_ERROR)
{
if(strcmp(buffer, "list")==0)
{
debug(LOG_NET, "cmd: list. Sending game list");
if (writeAll(tmp_socket[i], &numgames, sizeof(numgames)) == SOCKET_ERROR)
{
// Write error, most likely client disconnect.
debug(LOG_ERROR, "Failed to send message: %s", strSockError(getSockErr()));
debug(LOG_ERROR, "Couldn't get list from server. Make sure required ports are open. (TCP 9998-9999)");
}
else
{
// get the correct player count after kicks / leaves
gamestruct.desc.dwCurrentPlayers = NetPlay.playercount;
debug(LOG_NET, "Sending update to server to reflect new player count %d", NetPlay.playercount);
NETsendGAMESTRUCT(tmp_socket[i], &gamestruct);
}
debug(LOG_NET, "freeing temp socket %p (%d)", tmp_socket[i], __LINE__);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
}
else if (strcmp(buffer, "join") == 0)
{
debug(LOG_NET, "cmd: join. Sending GAMESTRUCT");
if (!NETsendGAMESTRUCT(tmp_socket[i], &gamestruct))
{
debug(LOG_ERROR, "Failed to respond (with GAMESTRUCT) to 'join' command, socket (%p) error: %s", tmp_socket[i], strSockError(getSockErr()));
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
}
socketBeginCompression(tmp_socket[i]);
}
else
{
debug(LOG_NET, "freeing temp socket %p (%d)", tmp_socket[i], __LINE__);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
}
}
else
{
debug(LOG_NET, "freeing temp socket %p (%d)", tmp_socket[i], __LINE__);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
}
}
if (checkSockets(tmp_socket_set, NET_READ_TIMEOUT) > 0)
{
for(i = 0; i < MAX_TMP_SOCKETS; ++i)
{
if ( tmp_socket[i] != NULL
&& socketReadReady(tmp_socket[i]))
{
uint8_t buffer[NET_BUFFER_SIZE];
ssize_t size = readNoInt(tmp_socket[i], buffer, sizeof(buffer));
if ((size == 0 && socketReadDisconnected(tmp_socket[i])) || size == SOCKET_ERROR)
{
// disconnect or programmer error
if (size == 0)
{
debug(LOG_NET, "Client socket disconnected.");
}
else
{
debug(LOG_NET, "Client socket encountered error: %s", strSockError(getSockErr()));
}
NETlogEntry("Client socket disconnected (allowJoining)", SYNC_FLAG, i);
debug(LOG_NET, "freeing temp socket %p (%d)", tmp_socket[i], __LINE__);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
continue;
}
NETinsertRawData(NETnetTmpQueue(i), buffer, size);
if (NETisMessageReady(NETnetTmpQueue(i)) && NETgetMessage(NETnetTmpQueue(i))->type == NET_JOIN)
{
uint8_t j;
uint8_t index;
uint8_t rejected = 0;
int tmp;
char name[64];
int32_t MajorVersion = 0;
int32_t MinorVersion = 0;
char ModList[modlist_string_size] = { '\0' };
char GamePassword[password_string_size] = { '\0' };
if (onBanList(clientAddress))
{
char buf[256] = {'\0'};
ssprintf(buf, "** A player that you have kicked tried to rejoin the game, and was rejected. IP:%s", clientAddress );
debug(LOG_INFO, "%s", buf);
NETlogEntry(buf, SYNC_FLAG, i);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
sync_counter.rejected++;
return;
}
NETbeginDecode(NETnetTmpQueue(i), NET_JOIN);
NETstring(name, sizeof(name));
NETint32_t(&MajorVersion); // NETCODE_VERSION_MAJOR
NETint32_t(&MinorVersion); // NETCODE_VERSION_MINOR
NETstring(ModList, sizeof(ModList));
NETstring(GamePassword, sizeof(GamePassword));
NETend();
NETpop(NETnetTmpQueue(i));
tmp = NET_CreatePlayer(name);
if (tmp == -1)
{
// FIXME: No room. Dropping the player without warning since protocol doesn't seem to support rejection at this point
debug(LOG_ERROR, "freeing temp socket %p, couldn't create player!", tmp_socket[i]);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
socketClose(tmp_socket[i]);
tmp_socket[i] = NULL;
sync_counter.cantjoin++;
return;
}
index = tmp;
debug(LOG_NET, "freeing temp socket %p (%d), creating permanent socket.", tmp_socket[i], __LINE__);
SocketSet_DelSocket(tmp_socket_set, tmp_socket[i]);
connected_bsocket[index] = tmp_socket[i];
tmp_socket[i] = NULL;
SocketSet_AddSocket(socket_set, connected_bsocket[index]);
NETmoveQueue(NETnetTmpQueue(i), NETnetQueue(index));
if (!NETisCorrectVersion(MajorVersion, MinorVersion))
{
// Wrong version. Reject.
rejected = (uint8_t)ERROR_WRONGVERSION;
}
else if (NetPlay.GamePassworded && strcmp(NetPlay.gamePassword, GamePassword) != 0)
{
// Wrong password. Reject.
rejected = (uint8_t)ERROR_WRONGPASSWORD;
}
else if ((int)NetPlay.playercount > gamestruct.desc.dwMaxPlayers)
{
// Game full. Reject.
rejected = (uint8_t)ERROR_FULL;
}
else if (strcmp(getModList(), ModList) != 0)
{
// Incompatible mods. Reject.
rejected = (uint8_t)ERROR_WRONGDATA;
}
if (rejected)
{
debug(LOG_INFO, "We were rejected, reason (%u)", (unsigned int) rejected);
//NETlogEntry(buf, SYNC_FLAG, index); // buf undeclared in newnet branch.
NETbeginEncode(NETnetQueue(index), NET_REJECTED);
NETuint8_t(&rejected);
NETend();
NETflush();
allow_joining = false; // no need to inform master server
NET_DestroyPlayer(index);
allow_joining = true;
SocketSet_DelSocket(socket_set, connected_bsocket[index]);
socketClose(connected_bsocket[index]);
connected_bsocket[index] = NULL;
return;
}
sstrcpy(NetPlay.players[index].IPtextAddress, clientAddress);
{
char buf[250] = {'\0'};
snprintf(buf, sizeof(buf), "Player %d has joined, IP is:%s", index, clientAddress);
NETlogEntry(buf, SYNC_FLAG, index);
}
NETbeginEncode(NETnetQueue(index), NET_ACCEPTED);
NETuint8_t(&index);
NETend();
// First send info about players to newcomer.
NETSendAllPlayerInfoTo(index);
// then send info about newcomer to all players.
NETBroadcastPlayerInfo(index);
debug(LOG_NET, "Player, %s, with index of %u has joined using socket %p", name, (unsigned int)index, connected_bsocket[index]);
// Increment player count
gamestruct.desc.dwCurrentPlayers++;
MultiPlayerJoin(index);
// Narrowcast to new player that everyone has joined.
for (j = 0; j < MAX_CONNECTED_PLAYERS; ++j)
{
if (index != j) // We will broadcast the index == j case.
{
if (NetPlay.players[j].allocated)
{
NETbeginEncode(NETnetQueue(index), NET_PLAYER_JOINED);
NETuint8_t(&j);
NETend();
}
}
}
// Broadcast to everyone that a new player has joined
NETbeginEncode(NETbroadcastQueue(), NET_PLAYER_JOINED);
NETuint8_t(&index);
NETend();
for (j = 0; j < MAX_CONNECTED_PLAYERS; ++j)
{
NETBroadcastPlayerInfo(j);
}
NETfixDuplicatePlayerNames();
// Send the updated GAMESTRUCT to the masterserver
NETregisterServer(2);
// reset flags for new players
NetPlay.players[index].wzFile.isCancelled = false;
NetPlay.players[index].wzFile.isSending = false;
NetPlay.players[index].needFile = false;
}
}
}
}
}
BOOL NEThostGame(const char* SessionName, const char* PlayerName,
SDWORD one, SDWORD two, SDWORD three, SDWORD four,
UDWORD plyrs) // # of players.
{
unsigned int i;
debug(LOG_NET, "NEThostGame(%s, %s, %d, %d, %d, %d, %u)", SessionName, PlayerName,
one, two, three, four, plyrs);
mapDownloadProgress = 100;
netPlayersUpdated = true;
if (NetPlay.bComms && NetPlay.isUPNP)
{
NETaddRedirects();
}
NET_InitPlayers();
if(!NetPlay.bComms)
{
selectedPlayer = 0;
NetPlay.isHost = true;
NetPlay.players[0].allocated = true;
NetPlay.players[0].connection = -1;
NetPlay.playercount = 1;
debug(LOG_NET, "Hosting but no comms");
// Now switch player color of the host to what they normally use for SP games
if ( getPlayerColour(NET_HOST_ONLY) != war_GetSPcolor())
{
changeColour(NET_HOST_ONLY, war_GetSPcolor());
}
return true;
}
// tcp_socket is the connection to the lobby server (or machine)
if (!tcp_socket)
tcp_socket = socketListen(gameserver_port);
if(tcp_socket == NULL)
{
debug(LOG_ERROR, "Cannot connect to master self: %s", strSockError(getSockErr()));
return false;
}
debug(LOG_NET, "New tcp_socket = %p", tcp_socket);
// Host needs to create a socket set for MAX_PLAYERS
if(!socket_set) socket_set = allocSocketSet();
if (socket_set == NULL)
{
debug(LOG_ERROR, "Cannot create socket set: %s", strSockError(getSockErr()));
return false;
}
// allocate socket storage for all possible players
for (i = 0; i < MAX_CONNECTED_PLAYERS; ++i)
{
connected_bsocket[i] = NULL;
NETinitQueue(NETnetQueue(i));
}
NetPlay.isHost = true;
NETlogEntry("Hosting game, resetting ban list.", SYNC_FLAG, 0);
if (IPlist)
{
free(IPlist);
IPlist = NULL;
}
sstrcpy(gamestruct.name, SessionName);
memset(&gamestruct.desc, 0, sizeof(gamestruct.desc));
gamestruct.desc.dwSize = sizeof(gamestruct.desc);
//gamestruct.desc.guidApplication = GAME_GUID;
memset(gamestruct.desc.host, 0, sizeof(gamestruct.desc.host));
gamestruct.desc.dwCurrentPlayers = 1;
gamestruct.desc.dwMaxPlayers = plyrs;
gamestruct.desc.dwFlags = 0;
gamestruct.desc.dwUserFlags[0] = one;
gamestruct.desc.dwUserFlags[1] = two;
gamestruct.desc.dwUserFlags[2] = three;
gamestruct.desc.dwUserFlags[3] = four;
memset(gamestruct.secondaryHosts, 0, sizeof(gamestruct.secondaryHosts));
sstrcpy(gamestruct.extra, "Extra"); // extra string (future use)
sstrcpy(gamestruct.mapname, game.map); // map we are hosting
sstrcpy(gamestruct.hostname, PlayerName);
sstrcpy(gamestruct.versionstring, VersionString); // version (string)
sstrcpy(gamestruct.modlist, getModList()); // List of mods
gamestruct.GAMESTRUCT_VERSION = 3; // version of this structure
gamestruct.game_version_major = NETCODE_VERSION_MAJOR; // Netcode Major version
gamestruct.game_version_minor = NETCODE_VERSION_MINOR; // NetCode Minor version
// gamestruct.privateGame = 0; // if true, it is a private game
gamestruct.pureGame = 0; // NO mods allowed if true
gamestruct.Mods = 0; // number of concatenated mods?
gamestruct.gameId = 0;
gamestruct.future2 = 0xBAD02; // for future use
gamestruct.future3 = 0xBAD03; // for future use
gamestruct.future4 = 0xBAD04; // for future use
selectedPlayer= NET_CreatePlayer(PlayerName);
realSelectedPlayer = selectedPlayer;
NetPlay.isHost = true;
NetPlay.isHostAlive = true;
NetPlay.hostPlayer = NET_HOST_ONLY;
ASSERT(selectedPlayer == NET_HOST_ONLY, "For now, host must start at player index zero, was %d", (int)selectedPlayer);
MultiPlayerJoin(selectedPlayer);
// Now switch player color of the host to what they normally use for SP games
if ( getPlayerColour(NET_HOST_ONLY) != war_GetSPcolor())
{
changeColour(NET_HOST_ONLY, war_GetSPcolor());
}
allow_joining = true;
NETregisterServer(0);
debug(LOG_NET, "Hosting a server. We are player %d.", selectedPlayer);
return true;
}
// ////////////////////////////////////////////////////////////////////////
// Stop the dplay interface from accepting more players.
BOOL NEThaltJoining(void)
{
debug(LOG_NET, "temporarily locking game to prevent more players");
allow_joining = false;
// disconnect from the master server
NETregisterServer(0);
return true;
}
// ////////////////////////////////////////////////////////////////////////
// find games on open connection
BOOL NETfindGame(void)
{
SocketAddress* hosts;
unsigned int gamecount = 0;
uint32_t gamesavailable;
unsigned int port = (hostname == masterserver_name) ? masterserver_port : gameserver_port;
int result = 0;
debug(LOG_NET, "Looking for games...");
if (getLobbyError() == ERROR_CHEAT || getLobbyError() == ERROR_KICKED)
{
return false;
}
setLobbyError(ERROR_NOERROR);
NetPlay.games[0].desc.dwSize = 0;
NetPlay.games[0].desc.dwCurrentPlayers = 0;
NetPlay.games[0].desc.dwMaxPlayers = 0;
if(!NetPlay.bComms)
{
selectedPlayer = NET_HOST_ONLY; // Host is always 0
NetPlay.isHost = true;
NetPlay.hostPlayer = NET_HOST_ONLY;
return true;
}
// We first check to see if we were given a IP/hostname from the command line
if (strlen(iptoconnect) )
{
hosts = resolveHost(iptoconnect, port);
if (hosts == NULL)
{
debug(LOG_ERROR, "Error connecting to client via hostname provided (%s)",iptoconnect);
debug(LOG_ERROR, "Cannot resolve hostname :%s",strSockError(getSockErr()));
setLobbyError(ERROR_CONNECTION);
return false;
}
else
{
// We got a valid ip now
hostname = strdup(iptoconnect); //copy it
memset(iptoconnect,0x0,sizeof(iptoconnect)); //reset it (so we don't loop back to this routine)
}
}
else if ((hosts = resolveHost(hostname, port)) == NULL)
{
debug(LOG_ERROR, "Cannot resolve hostname \"%s\": %s", hostname, strSockError(getSockErr()));
setLobbyError(ERROR_CONNECTION);
return false;
}
if (tcp_socket != NULL)
{
debug(LOG_NET, "Deleting tcp_socket %p", tcp_socket);
if (socket_set)
{
SocketSet_DelSocket(socket_set, tcp_socket);
}
socketClose(tcp_socket);
tcp_socket = NULL;
}
tcp_socket = socketOpenAny(hosts, 15000);
deleteSocketAddress(hosts);
hosts = NULL;
if (tcp_socket == NULL)
{
debug(LOG_ERROR, "Cannot connect to \"%s:%d\": %s", hostname, port, strSockError(getSockErr()));
setLobbyError(ERROR_CONNECTION);
return false;
}
debug(LOG_NET, "New tcp_socket = %p", tcp_socket);
// client machines only need 1 socket set
socket_set = allocSocketSet();
if (socket_set == NULL)
{
debug(LOG_ERROR, "Cannot create socket set: %s", strSockError(getSockErr()));
setLobbyError(ERROR_CONNECTION);
return false;
}
debug(LOG_NET, "Created socket_set %p", socket_set);
SocketSet_AddSocket(socket_set, tcp_socket);
debug(LOG_NET, "Sending list cmd");
if (writeAll(tcp_socket, "list", sizeof("list")) != SOCKET_ERROR
&& checkSockets(socket_set, NET_TIMEOUT_DELAY) > 0
&& socketReadReady(tcp_socket)
&& (result = readNoInt(tcp_socket, &gamesavailable, sizeof(gamesavailable))))
{
gamesavailable = MIN(ntohl(gamesavailable), ARRAY_SIZE(NetPlay.games));
}
else
{
if (result == SOCKET_ERROR)
{
debug(LOG_NET, "Server socket ecountered error: %s", strSockError(getSockErr()));
}
else
{
debug(LOG_NET, "Server didn't respond (timeout)");
}
SocketSet_DelSocket(socket_set, tcp_socket); // mark it invalid
socketClose(tcp_socket);
tcp_socket = NULL;
// when we fail to receive a game count, bail out
setLobbyError(ERROR_CONNECTION);
return false;
}
debug(LOG_NET, "receiving info on %u game(s)", (unsigned int)gamesavailable);
// Clear old games from list.
memset(NetPlay.games, 0x00, sizeof(NetPlay.games));
while (gamecount < gamesavailable)
{
// Attempt to receive a game description structure
if (!NETrecvGAMESTRUCT(&NetPlay.games[gamecount]))
{
debug(LOG_NET, "only %u game(s) received", (unsigned int)gamecount);
// If we fail, success depends on the amount of games that we've read already
return gamecount;
}
if (NetPlay.games[gamecount].desc.host[0] == '\0')
{
strncpy(NetPlay.games[gamecount].desc.host, getSocketTextAddress(tcp_socket), sizeof(NetPlay.games[gamecount].desc.host));
}
++gamecount;
}
return true;
}
// ////////////////////////////////////////////////////////////////////////
// ////////////////////////////////////////////////////////////////////////
// Functions used to setup and join games.
BOOL NETjoinGame(UDWORD gameNumber, const char* playername)
{
SocketAddress *hosts = NULL;
unsigned int i;
debug(LOG_NET, "resetting sockets.");
NETclose(); // just to be sure :)
debug(LOG_NET, "Trying to join gameNumber (%u)...", gameNumber);
mapDownloadProgress = 100;
netPlayersUpdated = true;
if (hostname == masterserver_name)
{
hostname = NULL;
}
// Loop through all of the hosts, using the first one we can connect to.
for (i = 0; i < ARRAY_SIZE(NetPlay.games[gameNumber].secondaryHosts) + 1; ++i)
{
free(hostname);
if (i > 0)
{
hostname = strdup(NetPlay.games[gameNumber].secondaryHosts[i - 1]);
}
else
{
hostname = strdup(NetPlay.games[gameNumber].desc.host);
}
hosts = resolveHost(hostname, gameserver_port);
if (hosts == NULL)
{
debug(LOG_ERROR, "Cannot resolve hostname \"%s\": %s", hostname, strSockError(getSockErr()));
continue;
}
if (tcp_socket != NULL)
{
socketClose(tcp_socket);
}
tcp_socket = socketOpenAny(hosts, 15000);
deleteSocketAddress(hosts);
if (tcp_socket != NULL)
{
break;
}
}
if (tcp_socket == NULL)
{
return false;
}
// client machines only need 1 socket set
socket_set = allocSocketSet();
if (socket_set == NULL)
{
debug(LOG_ERROR, "Cannot create socket set: %s", strSockError(getSockErr()));
return false;
}
debug(LOG_NET, "Created socket_set %p", socket_set);
// tcp_socket is used to talk to host machine
SocketSet_AddSocket(socket_set, tcp_socket);
if (writeAll(tcp_socket, "join", sizeof("join")) == SOCKET_ERROR)
{
debug(LOG_ERROR, "Failed to send 'join' command: %s", strSockError(getSockErr()));
SocketSet_DelSocket(socket_set, tcp_socket);
socketClose(tcp_socket);
tcp_socket = NULL;
deleteSocketSet(socket_set);
socket_set = NULL;
return false;
}
if (NETrecvGAMESTRUCT(&NetPlay.games[gameNumber])
&& NetPlay.games[gameNumber].desc.host[0] == '\0')
{
strncpy(NetPlay.games[gameNumber].desc.host, getSocketTextAddress(tcp_socket), sizeof(NetPlay.games[gameNumber].desc.host));
}
if (NetPlay.games[gameNumber].desc.dwCurrentPlayers >= NetPlay.games[gameNumber].desc.dwMaxPlayers)
{
// Shouldn't join; game is full
SocketSet_DelSocket(socket_set, tcp_socket);
socketClose(tcp_socket);
tcp_socket = NULL;
deleteSocketSet(socket_set);
socket_set = NULL;
setLobbyError(ERROR_FULL);
return false;
}
// Allocate memory for a new socket
NETinitQueue(NETnetQueue(NET_HOST_ONLY));
// NOTE: tcp_socket = bsocket now!
bsocket = tcp_socket;
socketBeginCompression(bsocket);
// Send a join message to the host
NETbeginEncode(NETnetQueue(NET_HOST_ONLY), NET_JOIN);
NETstring(playername, 64);
NETint32_t(&NETCODE_VERSION_MAJOR);
NETint32_t(&NETCODE_VERSION_MINOR);
NETstring(getModList(), modlist_string_size);
NETstring(NetPlay.gamePassword, sizeof(NetPlay.gamePassword));
NETend();
if (bsocket == NULL)
{
return false; // Connection dropped while sending NET_JOIN.
}
socketFlush(bsocket); // Make sure the message was completely sent.
i = SDL_GetTicks();
// Loop until we've been accepted into the game
for (;;)
{
NETQUEUE queue;
uint8_t type;
// FIXME: shouldn't there be some sort of rejection message?
if (SDL_GetTicks() > i + 5000)
{
// timeout
return false;
}
if (!NETrecvNet(&queue, &type))
{
continue;
}
if (type == NET_ACCEPTED)
{
// :)
uint8_t index;
NETbeginDecode(queue, NET_ACCEPTED);
// Retrieve the player ID the game host arranged for us
NETuint8_t(&index);
NETend();
NETpop(queue);
selectedPlayer = index;
realSelectedPlayer = selectedPlayer;
debug(LOG_NET, "NET_ACCEPTED received. Accepted into the game - I'm player %u using bsocket %p, tcp_socket=%p", (unsigned int)index, bsocket, tcp_socket);
NetPlay.isHost = false;
NetPlay.isHostAlive = true;
if (index >= MAX_CONNECTED_PLAYERS)
{
debug(LOG_ERROR, "Bad player number (%u) received from host!", index);
return false;
}
NetPlay.players[index].allocated = true;
sstrcpy(NetPlay.players[index].name, playername);
NetPlay.players[index].heartbeat = true;
return true;
}
else if (type == NET_REJECTED)
{
uint8_t rejection = 0;
NETbeginDecode(queue, NET_REJECTED);
NETuint8_t(&rejection);
NETend();
NETpop(queue);
debug(LOG_NET, "NET_REJECTED received. Error code: %u", (unsigned int) rejection);
setLobbyError((LOBBY_ERROR_TYPES)rejection);
NETclose();
}
NETpop(queue);
}
}
/*!
* Set the masterserver name
* \param hostname The hostname of the masterserver to connect to
*/
void NETsetMasterserverName(const char* hostname)
{
sstrcpy(masterserver_name, hostname);
}
/**
* @return The hostname of the masterserver we will connect to.
*/
const char* NETgetMasterserverName()
{
return masterserver_name;
}
/*!
* Set the masterserver port
* \param port The port of the masterserver to connect to
*/
void NETsetMasterserverPort(unsigned int port)
{
masterserver_port = port;
}
/**
* @return The port of the masterserver we will connect to.
*/
unsigned int NETgetMasterserverPort()
{
return masterserver_port;
}
/*!
* Set the port we shall host games on
* \param port The port to listen to
*/
void NETsetGameserverPort(unsigned int port)
{
gameserver_port = port;
}
/**
* @return The port we will host games on.
*/
unsigned int NETgetGameserverPort()
{
return gameserver_port;
}
void NETsetPlayerConnectionStatus(CONNECTION_STATUS status, unsigned player)
{
unsigned n;
const int timeouts[] = {GAME_TICKS_PER_SEC*10, GAME_TICKS_PER_SEC*10, GAME_TICKS_PER_SEC, GAME_TICKS_PER_SEC/6};
ASSERT(ARRAY_SIZE(timeouts) == CONNECTIONSTATUS_NORMAL, "Connection status timeout array too small.");
if (status == CONNECTIONSTATUS_NORMAL)
{
for (n = 0; n < CONNECTIONSTATUS_NORMAL; ++n)
{
NET_PlayerConnectionStatus[n][player] = 0;
}
return;
}
if (player == NET_ALL_PLAYERS)
{
for (n = 0; n < MAX_PLAYERS; ++n)
{
NETsetPlayerConnectionStatus(status, n);
}
return;
}
NET_PlayerConnectionStatus[status][player] = realTime + timeouts[status];
}
bool NETcheckPlayerConnectionStatus(CONNECTION_STATUS status, unsigned player)
{
unsigned n;
if (player == NET_ALL_PLAYERS)
{
for (n = 0; n < MAX_PLAYERS; ++n)
{
if (NETcheckPlayerConnectionStatus(status, n))
{
return true;
}
}
return false;
}
if (status == CONNECTIONSTATUS_NORMAL)
{
for (n = 0; n < CONNECTIONSTATUS_NORMAL; ++n)
{
if (NETcheckPlayerConnectionStatus((CONNECTION_STATUS)n, player))
{
return true;
}
}
return false;
}
return realTime < NET_PlayerConnectionStatus[status][player];
}
#define MAX_LEN_LOG_LINE 512 // From debug.c - no use printing something longer.
#define MAX_SYNC_MESSAGES 20000
#define MAX_SYNC_HISTORY 12
static unsigned syncDebugNext = 0;
static uint32_t syncDebugNum[MAX_SYNC_HISTORY];
static uint32_t syncDebugGameTime[MAX_SYNC_HISTORY + 1];
static char const *syncDebugFunctions[MAX_SYNC_HISTORY][MAX_SYNC_MESSAGES];
static char *syncDebugStrings[MAX_SYNC_HISTORY][MAX_SYNC_MESSAGES];
static uint32_t syncDebugCrcs[MAX_SYNC_HISTORY + 1];
void _syncDebug(const char *function, const char *str, ...)
{
#ifdef WZ_CC_MSVC
char const *f = function; while (*f != '\0') if (*f++ == ':') function = f; // Strip "Class::" from "Class::myFunction".
#endif
va_list ap;
char outputBuffer[MAX_LEN_LOG_LINE];
va_start(ap, str);
vssprintf(outputBuffer, str, ap);
va_end(ap);
if (syncDebugNum[syncDebugNext] < MAX_SYNC_MESSAGES)
{
syncDebugFunctions[syncDebugNext][syncDebugNum[syncDebugNext]] = function; // Function names are link-time constants, no need to duplicate.
syncDebugStrings[syncDebugNext][syncDebugNum[syncDebugNext]] = strdup(outputBuffer);
syncDebugCrcs[syncDebugNext] = crcSum(syncDebugCrcs[syncDebugNext], function, strlen(function) + 1);
syncDebugCrcs[syncDebugNext] = crcSum(syncDebugCrcs[syncDebugNext], outputBuffer, strlen(outputBuffer) + 1);
++syncDebugNum[syncDebugNext];
}
}
void _syncDebugBacktrace(const char *function)
{
#ifdef WZ_CC_MSVC
char const *f = function; while (*f != '\0') if (*f++ == ':') function = f; // Strip "Class::" from "Class::myFunction".
#endif
uint32_t backupCrc = syncDebugCrcs[syncDebugNext]; // Ignore CRC changes from _syncDebug(), since identical backtraces can be printed differently.
#ifdef WZ_OS_LINUX
void *btv[20];
unsigned num = backtrace(btv, sizeof(btv)/sizeof(*btv));
char **btc = backtrace_symbols(btv, num);
unsigned i;
for (i = 1; i + 2 < num; ++i) // =1: Don't print "src/warzone2100(syncDebugBacktrace+0x16) [0x6312d1]". +2: Don't print last two lines of backtrace such as "/lib/libc.so.6(__libc_start_main+0xe6) [0x7f91e040ea26]", since the address varies (even with the same binary).
{
_syncDebug("BT", "%s", btc[i]);
}
free(btc);
#else
_syncDebug("BT", "Sorry, syncDebugBacktrace() not implemented on your system. Called from %s.", function);
#endif
// Use CRC of something platform-independent, to avoid false positive desynchs.
syncDebugCrcs[syncDebugNext] = crcSum(backupCrc, function, strlen(function) + 1);
}
static void clearSyncDebugNext(void)
{
unsigned i;
for (i = 0; i != syncDebugNum[syncDebugNext]; ++i)
{
free(syncDebugStrings[syncDebugNext][i]);
syncDebugFunctions[syncDebugNext][i] = NULL; // Function names are link-time constants, and therefore shouldn't and can't be freed.
syncDebugStrings[syncDebugNext][i] = NULL;
}
syncDebugNum[syncDebugNext] = 0;
syncDebugGameTime[syncDebugNext] = 0;
syncDebugCrcs[syncDebugNext] = 0x00000000;
}
void resetSyncDebug()
{
for (syncDebugNext = 0; syncDebugNext < MAX_SYNC_HISTORY; ++syncDebugNext)
{
clearSyncDebugNext();
}
syncDebugGameTime[MAX_SYNC_HISTORY] = 0;
syncDebugCrcs[MAX_SYNC_HISTORY] = 0x00000000;
syncDebugNext = 0;
}
uint32_t nextDebugSync(void)
{
uint32_t ret = ~syncDebugCrcs[syncDebugNext]; // Invert bits, since everyone else seems to do that with CRCs...
// Save gameTime, so we know which CRC to compare with, later.
syncDebugGameTime[syncDebugNext] = gameTime;
// Go to next position, and free it ready for use.
syncDebugNext = (syncDebugNext + 1)%MAX_SYNC_HISTORY;
clearSyncDebugNext();
return ret;
}
static void dumpDebugSync(uint8_t *buf, size_t bufLen, uint32_t time, unsigned player)
{
char fname[100];
PHYSFS_file *fp;
ssprintf(fname, "logs/desync%u_p%u.txt", time, player);
fp = openSaveFile(fname);
PHYSFS_write(fp, buf, bufLen, 1);
PHYSFS_close(fp);
debug(LOG_ERROR, "Dumped player %u's sync error at gameTime %u to file: %s%s", player, time, PHYSFS_getRealDir(fname), fname);
}
static void sendDebugSync(uint8_t *buf, uint32_t bufLen, uint32_t time)
{
// Save our own, before sending, so that if we have 2 clients running on the same computer, to guarantee that it is done saving before the other client saves on top.
dumpDebugSync(buf, bufLen, time, selectedPlayer);
NETbeginEncode(NETbroadcastQueue(), NET_DEBUG_SYNC);
NETuint32_t(&time);
NETuint32_t(&bufLen);
NETbin(buf, bufLen);
NETend();
}
static uint8_t debugSyncTmpBuf[2000000];
static void recvDebugSync(NETQUEUE queue)
{
uint32_t time = 0;
uint32_t bufLen = 0;
NETbeginDecode(queue, NET_DEBUG_SYNC);
NETuint32_t(&time);
NETuint32_t(&bufLen);
bufLen = MIN(bufLen, ARRAY_SIZE(debugSyncTmpBuf));
NETbin(debugSyncTmpBuf, bufLen);
NETend();
dumpDebugSync(debugSyncTmpBuf, bufLen, time, queue.index);
}
bool checkDebugSync(uint32_t checkGameTime, uint32_t checkCrc)
{
unsigned index;
unsigned i;
static uint32_t numDumps = 0;
size_t bufSize = 0;
if (checkGameTime == syncDebugGameTime[syncDebugNext]) // Can't happen - and syncDebugGameTime[] == 0, until just before sending the CRC, anyway.
{
debug(LOG_ERROR, "Huh? We aren't done yet...");
return true;
}
for (index = 0; index < MAX_SYNC_HISTORY + 1; ++index)
{
if (syncDebugGameTime[index] == checkGameTime)
{
if (~syncDebugCrcs[index] == checkCrc) // Invert bits, since everyone else seems to do that with CRCs...
{
return true; // Check passed. (So far... There might still be more players to compare CRCs with.)
}
break; // Check failed!
}
}
if (index >= MAX_SYNC_HISTORY)
{
return false; // Couldn't check. May have dumped already, or MAX_SYNC_HISTORY isn't big enough compared to the maximum latency.
}
// Dump our version, and also erase it, so we only dump it at most once.
debug(LOG_ERROR, "Inconsistent sync debug at gameTime %u. My version has %u lines, CRC = 0x%08X.", syncDebugGameTime[index], syncDebugNum[index], ~syncDebugCrcs[index] & 0xFFFFFFFF);
bufSize += snprintf((char *)debugSyncTmpBuf + bufSize, ARRAY_SIZE(debugSyncTmpBuf) - bufSize, "===== BEGIN gameTime=%u, %u lines, CRC 0x%08X =====\n", syncDebugGameTime[index], syncDebugNum[index], ~syncDebugCrcs[index] & 0xFFFFFFFF);
bufSize = MIN(bufSize, ARRAY_SIZE(debugSyncTmpBuf)); // snprintf will not overflow debugSyncTmpBuf, but returns as much as it would have printed if possible.
for (i = 0; i < syncDebugNum[index]; ++i)
{
bufSize += snprintf((char *)debugSyncTmpBuf + bufSize, ARRAY_SIZE(debugSyncTmpBuf) - bufSize, "[%s] %s\n", syncDebugFunctions[index][i], syncDebugStrings[index][i]);
bufSize = MIN(bufSize, ARRAY_SIZE(debugSyncTmpBuf)); // snprintf will not overflow debugSyncTmpBuf, but returns as much as it would have printed if possible.
free(syncDebugStrings[index][i]);
}
bufSize += snprintf((char *)debugSyncTmpBuf + bufSize, ARRAY_SIZE(debugSyncTmpBuf) - bufSize, "===== END gameTime=%u, %u lines, CRC 0x%08X =====\n", syncDebugGameTime[index], syncDebugNum[index], ~syncDebugCrcs[index] & 0xFFFFFFFF);
bufSize = MIN(bufSize, ARRAY_SIZE(debugSyncTmpBuf)); // snprintf will not overflow debugSyncTmpBuf, but returns as much as it would have printed if possible.
if (numDumps < 5)
{
++numDumps;
sendDebugSync(debugSyncTmpBuf, bufSize, syncDebugGameTime[index]);
}
// Backup correct CRC for checking against remaining players, even though we erased the logs (which were dumped already).
syncDebugGameTime[MAX_SYNC_HISTORY] = syncDebugGameTime[index];
syncDebugCrcs[MAX_SYNC_HISTORY] = syncDebugCrcs[index];
// Finish erasing our version.
syncDebugNum[index] = 0;
syncDebugGameTime[index] = 0;
syncDebugCrcs[index] = 0x00000000;
return false; // Ouch.
}
const char *messageTypeToString(unsigned messageType_)
{
MESSAGE_TYPES messageType = (MESSAGE_TYPES)messageType_; // Cast to enum, so switch gives a warning if new message types are added without updating the switch.
switch (messageType)
{
// Search: \s*([\w_]+).*
// Replace: case \1: return "\1";
// Search: (case ...............................) *(return "[\w_]+";)
// Replace: \t\t\1\2
case NET_MIN_TYPE: return "NET_MIN_TYPE";
case NET_PING: return "NET_PING";
case NET_PLAYER_STATS: return "NET_PLAYER_STATS";
case NET_TEXTMSG: return "NET_TEXTMSG";
case NET_PLAYERRESPONDING: return "NET_PLAYERRESPONDING";
case NET_OPTIONS: return "NET_OPTIONS";
case NET_KICK: return "NET_KICK";
case NET_FIREUP: return "NET_FIREUP";
case NET_COLOURREQUEST: return "NET_COLOURREQUEST";
case NET_AITEXTMSG: return "NET_AITEXTMSG";
case NET_BEACONMSG: return "NET_BEACONMSG";
case NET_TEAMREQUEST: return "NET_TEAMREQUEST";
case NET_JOIN: return "NET_JOIN";
case NET_ACCEPTED: return "NET_ACCEPTED";
case NET_PLAYER_INFO: return "NET_PLAYER_INFO";
case NET_PLAYER_JOINED: return "NET_PLAYER_JOINED";
case NET_PLAYER_LEAVING: return "NET_PLAYER_LEAVING";
case NET_PLAYER_DROPPED: return "NET_PLAYER_DROPPED";
case NET_GAME_FLAGS: return "NET_GAME_FLAGS";
case NET_READY_REQUEST: return "NET_READY_REQUEST";
case NET_REJECTED: return "NET_REJECTED";
case NET_POSITIONREQUEST: return "NET_POSITIONREQUEST";
case NET_DATA_CHECK: return "NET_DATA_CHECK";
case NET_HOST_DROPPED: return "NET_HOST_DROPPED";
case NET_SEND_TO_PLAYER: return "NET_SEND_TO_PLAYER";
case NET_SHARE_GAME_QUEUE: return "NET_SHARE_GAME_QUEUE";
case NET_FILE_REQUESTED: return "NET_FILE_REQUESTED";
case NET_FILE_CANCELLED: return "NET_FILE_CANCELLED";
case NET_FILE_PAYLOAD: return "NET_FILE_PAYLOAD";
case NET_DEBUG_SYNC: return "NET_DEBUG_SYNC";
case NET_MAX_TYPE: return "NET_MAX_TYPE";
case GAME_MIN_TYPE: return "GAME_MIN_TYPE";
case GAME_DROID: return "GAME_DROID";
case GAME_DROIDINFO: return "GAME_DROIDINFO";
case GAME_TEMPLATE: return "GAME_TEMPLATE";
case GAME_TEMPLATEDEST: return "GAME_TEMPLATEDEST";
case GAME_FEATUREDEST: return "GAME_FEATUREDEST";
case GAME_RESEARCH: return "GAME_RESEARCH";
case GAME_FEATURES: return "GAME_FEATURES";
case GAME_ALLIANCE: return "GAME_ALLIANCE";
case GAME_GIFT: return "GAME_GIFT";
case GAME_ARTIFACTS: return "GAME_ARTIFACTS";
case GAME_RESEARCHSTATUS: return "GAME_RESEARCHSTATUS";
case GAME_STRUCTUREINFO: return "GAME_STRUCTUREINFO";
case GAME_LASSAT: return "GAME_LASSAT";
case GAME_GAME_TIME: return "GAME_GAME_TIME";
case GAME_PLAYER_LEFT: return "GAME_PLAYER_LEFT";
case GAME_DROIDDEST: return "GAME_DROIDDEST";
case GAME_CHECK_DROID: return "GAME_CHECK_DROID";
case GAME_CHECK_STRUCT: return "GAME_CHECK_STRUCT";
case GAME_CHECK_POWER: return "GAME_CHECK_POWER";
case GAME_STRUCTDEST: return "GAME_STRUCTDEST";
case GAME_BUILDFINISHED: return "GAME_BUILDFINISHED";
case GAME_DEMOLISH: return "GAME_DEMOLISH";
case GAME_DROIDEMBARK: return "GAME_DROIDEMBARK";
case GAME_DROIDDISEMBARK: return "GAME_DROIDDISEMBARK";
case GAME_MAX_TYPE: return "GAME_MAX_TYPE";
}
return "(INVALID MESSAGE TYPE)";
}
/**
* Check if ip is on the banned list.
* \param ip IP address converted to text
*/
static bool onBanList(const char *ip)
{
int i;
if (!IPlist) return false; //if no bans are added, then don't check.
for(i = 0; i < MAX_BANS ; i++)
{
if (strcmp(ip, IPlist[i].IPAddress) == 0)
{
return true;
}
}
return false;
}
/**
* Create the banned list.
* \param ip IP address in text format
* \param name Name of the player we are banning
*/
static void addToBanList(const char *ip, const char *name)
{
static int numBans = 0;
if (!IPlist)
{
IPlist = (PLAYER_IP *)malloc(sizeof(PLAYER_IP) * MAX_BANS + 1);
if (!IPlist)
{
debug(LOG_FATAL, "Out of memory!");
abort();
}
numBans = 0;
}
memset(IPlist, 0x0, sizeof(PLAYER_IP) * MAX_BANS);
sstrcpy(IPlist[numBans].IPAddress, ip);
sstrcpy(IPlist[numBans].pname, name);
numBans++;
sync_counter.banned++;
if (numBans > MAX_BANS)
{
debug(LOG_INFO, "We have exceeded %d bans, resetting to 0", MAX_BANS);
numBans = 0;
}
}
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