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netplay.cpp
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netplay.cpp
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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_20110320";
static int NETCODE_VERSION_MAJOR = 4;
static int NETCODE_VERSION_MINOR = 20110320;
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);
}
}