/*
* SVC_GetChallenge
*
* Returns a challenge number that can be used
* in a subsequent client_connect command.
* We do this to prevent denial of service attacks that
* flood the server with invalid connection IPs. With a
* challenge, they must give a valid IP address.
*/
static void SVC_GetChallenge( const socket_t *socket, const netadr_t *address )
{
int i;
int oldest;
int oldestTime;
oldest = 0;
oldestTime = 0x7fffffff;
if( sv_showChallenge->integer )
Com_Printf( "Challenge Packet %s\n", NET_AddressToString( address ) );
// see if we already have a challenge for this ip
for( i = 0; i < MAX_CHALLENGES; i++ )
{
if( NET_CompareBaseAddress( address, &svs.challenges[i].adr ) )
break;
if( svs.challenges[i].time < oldestTime )
{
oldestTime = svs.challenges[i].time;
oldest = i;
}
}
if( i == MAX_CHALLENGES )
{
// overwrite the oldest
svs.challenges[oldest].challenge = rand() & 0x7fff;
svs.challenges[oldest].adr = *address;
svs.challenges[oldest].time = Sys_Milliseconds();
i = oldest;
}
Netchan_OutOfBandPrint( socket, address, "challenge %i", svs.challenges[i].challenge );
}
/*
* TV_Downstream_GetChallenge
*
* Returns a challenge number that can be used
* in a subsequent client_connect command.
* We do this to prevent denial of service attacks that
* flood the server with invalid upstream IPs. With a
* challenge, they must give a valid IP address.
*/
static void TV_Downstream_GetChallenge( const socket_t *socket, const netadr_t *address )
{
int i;
int oldest;
int oldestTime;
oldest = 0;
oldestTime = 0x7fffffff;
// see if we already have a challenge for this ip
for( i = 0; i < MAX_CHALLENGES; i++ )
{
if( NET_CompareBaseAddress( address, &tvs.challenges[i].adr ) )
break;
if( tvs.challenges[i].time < oldestTime )
{
oldestTime = tvs.challenges[i].time;
oldest = i;
}
}
if( i == MAX_CHALLENGES )
{
// overwrite the oldest
tvs.challenges[oldest].challenge = rand() & 0x7fff;
tvs.challenges[oldest].adr = *address;
tvs.challenges[oldest].time = tvs.realtime;
i = oldest;
}
Netchan_OutOfBandPrint( socket, address, "challenge %i", tvs.challenges[i].challenge );
}
static struct sockaddr_in *QRY_FL_Filtered(struct sockaddr_in *addr)
{
int i;
for (i = 0; i < server_filter.count; i++)
{
if (NET_CompareBaseAddress(addr, &server_filter.addr[i]))
return &server_filter.addr[i];
}
return NULL;
}
/*
* SVC_DirectConnect
* A connection request that did not come from the master
*/
static void SVC_DirectConnect( const socket_t *socket, const netadr_t *address )
{
#ifdef TCP_ALLOW_CONNECT
int incoming = 0;
#endif
char userinfo[MAX_INFO_STRING];
client_t *cl, *newcl;
int i, version, game_port, challenge;
int previousclients;
int session_id;
char *session_id_str;
unsigned int ticket_id;
qboolean tv_client;
Com_DPrintf( "SVC_DirectConnect (%s)\n", Cmd_Args() );
version = atoi( Cmd_Argv( 1 ) );
if( version != APP_PROTOCOL_VERSION )
{
if( version <= 6 )
{ // before reject packet was added
Netchan_OutOfBandPrint( socket, address, "print\nServer is version %4.2f. Protocol %3i\n",
APP_VERSION, APP_PROTOCOL_VERSION );
}
else
{
Netchan_OutOfBandPrint( socket, address,
"reject\n%i\n%i\nServer and client don't have the same version\n", DROP_TYPE_GENERAL, 0 );
}
Com_DPrintf( " rejected connect from protocol %i\n", version );
return;
}
game_port = atoi( Cmd_Argv( 2 ) );
challenge = atoi( Cmd_Argv( 3 ) );
tv_client = ( atoi( Cmd_Argv( 5 ) ) & 1 ? qtrue : qfalse );
if( !Info_Validate( Cmd_Argv( 4 ) ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nInvalid userinfo string\n", DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Connection from %s refused: invalid userinfo string\n", NET_AddressToString( address ) );
return;
}
Q_strncpyz( userinfo, Cmd_Argv( 4 ), sizeof( userinfo ) );
// force the IP key/value pair so the game can filter based on ip
if( !Info_SetValueForKey( userinfo, "socket", NET_SocketTypeToString( socket->type ) ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nError: Couldn't set userinfo (socket)\n",
DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Connection from %s refused: couldn't set userinfo (socket)\n", NET_AddressToString( address ) );
return;
}
if( !Info_SetValueForKey( userinfo, "ip", NET_AddressToString( address ) ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nError: Couldn't set userinfo (ip)\n",
DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Connection from %s refused: couldn't set userinfo (ip)\n", NET_AddressToString( address ) );
return;
}
if( Cmd_Argc() >= 7 )
{
// we have extended information, ticket-id and session-id
Com_Printf("Extended information %s\n", Cmd_Argv(6) );
ticket_id = (unsigned int)atoi( Cmd_Argv(6) );
session_id_str = Info_ValueForKey( userinfo, "cl_mm_session" );
if( session_id_str != NULL )
session_id = atoi( session_id_str );
else
session_id = 0;
}
else
{
ticket_id = 0;
session_id = 0;
}
#ifdef TCP_ALLOW_CONNECT
if( socket->type == SOCKET_TCP )
{
// find the connection
for( i = 0; i < MAX_INCOMING_CONNECTIONS; i++ )
{
if( !svs.incoming[i].active )
continue;
if( NET_CompareAddress( &svs.incoming[i].address, address ) && socket == &svs.incoming[i].socket )
break;
}
if( i == MAX_INCOMING_CONNECTIONS )
{
Com_Error( ERR_FATAL, "Incoming connection not found.\n" );
return;
}
incoming = i;
}
#endif
// see if the challenge is valid
for( i = 0; i < MAX_CHALLENGES; i++ )
{
if( NET_CompareBaseAddress( address, &svs.challenges[i].adr ) )
{
if( challenge == svs.challenges[i].challenge )
{
svs.challenges[i].challenge = 0; // wsw : r1q2 : reset challenge
svs.challenges[i].time = 0;
NET_InitAddress( &svs.challenges[i].adr, NA_NOTRANSMIT );
break; // good
}
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nBad challenge\n",
DROP_TYPE_GENERAL, DROP_FLAG_AUTORECONNECT );
return;
}
}
if( i == MAX_CHALLENGES )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nNo challenge for address\n",
DROP_TYPE_GENERAL, DROP_FLAG_AUTORECONNECT );
return;
}
//r1: limit connections from a single IP
if( sv_iplimit->integer )
{
previousclients = 0;
for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ )
{
if( cl->state == CS_FREE )
continue;
if( NET_CompareBaseAddress( address, &cl->netchan.remoteAddress ) )
{
//r1: zombies are less dangerous
if( cl->state == CS_ZOMBIE )
previousclients++;
else
previousclients += 2;
}
}
if( previousclients >= sv_iplimit->integer * 2 )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nToo many connections from your host\n", DROP_TYPE_GENERAL,
DROP_FLAG_AUTORECONNECT );
Com_DPrintf( "%s:connect rejected : too many connections\n", NET_AddressToString( address ) );
return;
}
}
newcl = NULL;
// if there is already a slot for this ip, reuse it
for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ )
{
if( cl->state == CS_FREE )
continue;
if( NET_CompareAddress( address, &cl->netchan.remoteAddress ) ||
( NET_CompareBaseAddress( address, &cl->netchan.remoteAddress ) && cl->netchan.game_port == game_port ) )
{
if( !NET_IsLocalAddress( address ) &&
( svs.realtime - cl->lastconnect ) < (unsigned)( sv_reconnectlimit->integer * 1000 ) )
{
Com_DPrintf( "%s:reconnect rejected : too soon\n", NET_AddressToString( address ) );
return;
}
Com_Printf( "%s:reconnect\n", NET_AddressToString( address ) );
newcl = cl;
break;
}
}
// find a client slot
if( !newcl )
{
for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ )
{
if( cl->state == CS_FREE )
{
newcl = cl;
break;
}
// overwrite fakeclient if no free spots found
if( cl->state && cl->edict && ( cl->edict->r.svflags & SVF_FAKECLIENT ) )
newcl = cl;
}
if( !newcl )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nServer is full\n", DROP_TYPE_GENERAL,
DROP_FLAG_AUTORECONNECT );
Com_DPrintf( "Server is full. Rejected a connection.\n" );
return;
}
if( newcl->state && newcl->edict && ( newcl->edict->r.svflags & SVF_FAKECLIENT ) )
SV_DropClient( newcl, DROP_TYPE_GENERAL, "Need room for a real player" );
}
// get the game a chance to reject this connection or modify the userinfo
if( !SV_ClientConnect( socket, address, newcl, userinfo, game_port, challenge, qfalse,
tv_client, ticket_id, session_id ) )
{
char *rejtype, *rejflag, *rejtypeflag, *rejmsg;
rejtype = Info_ValueForKey( userinfo, "rejtype" );
if( !rejtype )
rejtype = "0";
rejflag = Info_ValueForKey( userinfo, "rejflag" );
if( !rejflag )
rejflag = "0";
// hax because Info_ValueForKey can only be called twice in a row
rejtypeflag = va( "%s\n%s", rejtype, rejflag );
rejmsg = Info_ValueForKey( userinfo, "rejmsg" );
if( !rejmsg )
rejmsg = "Game module rejected connection";
Netchan_OutOfBandPrint( socket, address, "reject\n%s\n%s\n", rejtypeflag, rejmsg );
Com_DPrintf( "Game rejected a connection.\n" );
return;
}
// send the connect packet to the client
Netchan_OutOfBandPrint( socket, address, "client_connect\n%s", newcl->session );
// free the incoming entry
#ifdef TCP_ALLOW_CONNECT
if( socket->type == SOCKET_TCP )
{
svs.incoming[incoming].active = qfalse;
svs.incoming[incoming].socket.open = qfalse;
}
#endif
}
/*
* SV_ReadPackets
*/
static void SV_ReadPackets( void )
{
int i, socketind, ret;
client_t *cl;
#ifdef TCP_SUPPORT
socket_t newsocket;
netadr_t mmserver;
#endif
int game_port;
socket_t *socket;
netadr_t address;
static msg_t msg;
static qbyte msgData[MAX_MSGLEN];
socket_t* sockets [] =
{
&svs.socket_loopback,
&svs.socket_udp,
&svs.socket_udp6,
};
#ifdef TCP_SUPPORT
if( SV_MM_Initialized() )
SV_MM_NetAddress( &mmserver );
if( svs.socket_tcp.open )
{
while( qtrue )
{
// find a free slot
for( i = 0; i < MAX_INCOMING_CONNECTIONS; i++ )
{
if( !svs.incoming[i].active )
break;
}
if( i == MAX_INCOMING_CONNECTIONS )
break;
if( ( ret = NET_Accept( &svs.socket_tcp, &newsocket, &address ) ) == 0 )
break;
if( ret == -1 )
{
Com_Printf( "NET_Accept: Error: %s\n", NET_ErrorString() );
continue;
}
Com_Printf( "New TCP connection from %s\n", NET_AddressToString( &address ) );
svs.incoming[i].active = qtrue;
svs.incoming[i].socket = newsocket;
svs.incoming[i].address = address;
svs.incoming[i].time = svs.realtime;
}
}
for( i = 0; i < MAX_INCOMING_CONNECTIONS; i++ )
{
if( !svs.incoming[i].active )
continue;
ret = NET_GetPacket( &svs.incoming[i].socket, &address, &msg );
if( ret == -1 )
{
Com_Printf( "NET_GetPacket: Error: %s\n", NET_ErrorString() );
NET_CloseSocket( &svs.incoming[i].socket );
svs.incoming[i].active = qfalse;
}
else if( ret == 1 )
{
if( SV_MM_Initialized() && NET_CompareBaseAddress( &mmserver, &address ) )
{
Com_DPrintf( "TCP packet from matchmaker\n" );
SV_MM_SetConnection( &svs.incoming[i] );
SV_MM_Packet( &msg );
SV_MM_SetConnection( NULL );
continue;
}
if( *(int *)msg.data != -1 )
{
Com_Printf( "Sequence packet without connection\n" );
NET_CloseSocket( &svs.incoming[i].socket );
svs.incoming[i].active = qfalse;
continue;
}
Com_Printf( "Connectionless TCP packet from: %s\n", NET_AddressToString( &address ) );
SV_ConnectionlessPacket( &svs.incoming[i].socket, &address, &msg );
}
}
#endif
MSG_Init( &msg, msgData, sizeof( msgData ) );
for( socketind = 0; socketind < sizeof( sockets ) / sizeof( sockets[0] ); socketind++ )
{
socket = sockets[socketind];
if( !socket->open )
continue;
while( ( ret = NET_GetPacket( socket, &address, &msg ) ) != 0 )
{
if( ret == -1 )
{
Com_Printf( "NET_GetPacket: Error: %s\n", NET_ErrorString() );
continue;
}
// check for connectionless packet (0xffffffff) first
if( *(int *)msg.data == -1 )
{
SV_ConnectionlessPacket( socket, &address, &msg );
continue;
}
// read the game port out of the message so we can fix up
// stupid address translating routers
MSG_BeginReading( &msg );
MSG_ReadLong( &msg ); // sequence number
MSG_ReadLong( &msg ); // sequence number
game_port = MSG_ReadShort( &msg ) & 0xffff;
// data follows
// check for packets from connected clients
for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ )
{
unsigned short addr_port;
if( cl->state == CS_FREE || cl->state == CS_ZOMBIE )
continue;
if( cl->edict && ( cl->edict->r.svflags & SVF_FAKECLIENT ) )
continue;
if( !NET_CompareBaseAddress( &address, &cl->netchan.remoteAddress ) )
continue;
if( cl->netchan.game_port != game_port )
continue;
addr_port = NET_GetAddressPort( &address );
if( NET_GetAddressPort( &cl->netchan.remoteAddress ) != addr_port )
{
Com_Printf( "SV_ReadPackets: fixing up a translated port\n" );
NET_SetAddressPort( &cl->netchan.remoteAddress, addr_port );
}
if( SV_ProcessPacket( &cl->netchan, &msg ) ) // this is a valid, sequenced packet, so process it
{
cl->lastPacketReceivedTime = svs.realtime;
SV_ParseClientMessage( cl, &msg );
}
break;
}
}
}
// handle clients with individual sockets
for( i = 0; i < sv_maxclients->integer; i++ )
{
cl = &svs.clients[i];
if( cl->state == CS_ZOMBIE || cl->state == CS_FREE )
continue;
if( !cl->individual_socket )
continue;
// not while, we only handle one packet per client at a time here
if( ( ret = NET_GetPacket( cl->netchan.socket, &address, &msg ) ) != 0 )
{
if( ret == -1 )
{
Com_Printf( "Error receiving packet from %s: %s\n", NET_AddressToString( &cl->netchan.remoteAddress ),
NET_ErrorString() );
if( cl->reliable )
SV_DropClient( cl, DROP_TYPE_GENERAL, "Error receiving packet: %s", NET_ErrorString() );
}
else
{
if( SV_ProcessPacket( &cl->netchan, &msg ) )
{
// this is a valid, sequenced packet, so process it
cl->lastPacketReceivedTime = svs.realtime;
SV_ParseClientMessage( cl, &msg );
}
}
}
}
}
/*
* TV_Downstream_DirectConnect
* A upstream request that did not come from the master
*/
static void TV_Downstream_DirectConnect( const socket_t *socket, const netadr_t *address )
{
#ifdef TCP_ALLOW_TVCONNECT
int incoming = 0;
#endif
char userinfo[MAX_INFO_STRING], *name;
client_t *cl, *newcl;
int i, version, game_port, challenge;
bool tv_client;
version = atoi( Cmd_Argv( 1 ) );
if( version != APP_PROTOCOL_VERSION )
{
if( version <= 6 )
{ // before reject packet was added
Netchan_OutOfBandPrint( socket, address, "print\nServer is version %4.2f. Protocol %3i\n",
APP_VERSION, APP_PROTOCOL_VERSION );
}
else
{
Netchan_OutOfBandPrint( socket, address,
"reject\n%i\n%i\nServer and client don't have the same version\n", DROP_TYPE_GENERAL, 0 );
}
return;
}
game_port = atoi( Cmd_Argv( 2 ) );
challenge = atoi( Cmd_Argv( 3 ) );
tv_client = ( atoi( Cmd_Argv( 5 ) ) & 1 ? true : false );
if( !Info_Validate( Cmd_Argv( 4 ) ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nInvalid userinfo string\n", DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Upstream from %s refused: invalid userinfo string\n", NET_AddressToString( address ) );
return;
}
Q_strncpyz( userinfo, Cmd_Argv( 4 ), sizeof( userinfo ) );
// force the IP key/value pair so the game can filter based on ip
if( !Info_SetValueForKey( userinfo, "socket", NET_SocketTypeToString( socket->type ) ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nError: Couldn't set userinfo (socket)\n",
DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Upstream from %s refused: couldn't set userinfo (socket)\n", NET_AddressToString( address ) );
return;
}
if( !Info_SetValueForKey( userinfo, "ip", NET_AddressToString( address ) ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nError: Couldn't set userinfo (ip)\n",
DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Upstream from %s refused: couldn't set userinfo (ip)\n", NET_AddressToString( address ) );
return;
}
// we handle name ourselves here, since tv module doesn't know about all the players
name = TV_Downstream_FixName( Info_ValueForKey( userinfo, "name" ), NULL );
if( !Info_SetValueForKey( userinfo, "name", name ) )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nError: Couldn't set userinfo (name)\n",
DROP_TYPE_GENERAL, 0 );
Com_DPrintf( "Upstream from %s refused: couldn't set userinfo (name)\n", NET_AddressToString( address ) );
return;
}
#ifdef TCP_ALLOW_TVCONNECT
if( socket->type == SOCKET_TCP )
{
// find the upstream
for( i = 0; i < MAX_INCOMING_CONNECTIONS; i++ )
{
if( !tvs.incoming[i].active )
continue;
if( NET_CompareAddress( &tvs.incoming[i].address, address ) && socket == &tvs.incoming[i].socket )
break;
}
if( i == MAX_INCOMING_CONNECTIONS )
{
Com_Error( ERR_FATAL, "Incoming upstream not found.\n" );
return;
}
incoming = i;
}
#endif
// see if the challenge is valid
for( i = 0; i < MAX_CHALLENGES; i++ )
{
if( NET_CompareBaseAddress( address, &tvs.challenges[i].adr ) )
{
if( challenge == tvs.challenges[i].challenge )
{
tvs.challenges[i].challenge = 0; // wsw : r1q2 : reset challenge
tvs.challenges[i].time = 0;
NET_InitAddress( &tvs.challenges[i].adr, NA_NOTRANSMIT );
break; // good
}
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nBad challenge\n",
DROP_TYPE_GENERAL, DROP_FLAG_AUTORECONNECT );
return;
}
}
if( i == MAX_CHALLENGES )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nNo challenge for address\n",
DROP_TYPE_GENERAL, DROP_FLAG_AUTORECONNECT );
return;
}
newcl = NULL;
// if there is already a slot for this ip, reuse it
for( i = 0, cl = tvs.clients; i < tv_maxclients->integer; i++, cl++ )
{
if( cl->state == CS_FREE )
continue;
if( NET_CompareAddress( address, &cl->netchan.remoteAddress ) ||
( NET_CompareBaseAddress( address, &cl->netchan.remoteAddress ) && cl->netchan.game_port == game_port ) )
{
if( !NET_IsLocalAddress( address ) &&
( tvs.realtime - cl->lastconnect ) < (unsigned)( tv_reconnectlimit->integer * 1000 ) )
{
return;
}
newcl = cl;
break;
}
}
// find a client slot
if( !newcl )
{
for( i = 0, cl = tvs.clients; i < tv_maxclients->integer; i++, cl++ )
{
if( cl->state == CS_FREE )
{
newcl = cl;
break;
}
}
if( !newcl )
{
Netchan_OutOfBandPrint( socket, address, "reject\n%i\n%i\nServer is full\n", DROP_TYPE_GENERAL,
DROP_FLAG_AUTORECONNECT );
return;
}
}
// get the game a chance to reject this upstream or modify the userinfo
if( !TV_Downstream_ClientConnect( socket, address, newcl, userinfo, game_port, challenge, tv_client ) )
{
char *rejtypeflag, *rejmsg;
// hax because Info_ValueForKey can only be called twice in a row
rejtypeflag = va( "%s\n%s", Info_ValueForKey( userinfo, "rejtype" ), Info_ValueForKey( userinfo, "rejflag" ) );
rejmsg = Info_ValueForKey( userinfo, "rejmsg" );
Netchan_OutOfBandPrint( socket, address, "reject\n%s\n%s\n", rejtypeflag, rejmsg );
return;
}
// send the connect packet to the client
Netchan_OutOfBandPrint( socket, address, "client_connect" );
// free the incoming entry
#ifdef TCP_ALLOW_TVCONNECT
if( socket->type == SOCKET_TCP )
{
tvs.incoming[incoming].active = false;
tvs.incoming[incoming].socket.open = false;
}
#endif
}
/*
* TV_Downstream_ReadPackets
*/
void TV_Downstream_ReadPackets( void )
{
int i, socketind, ret, game_port;
client_t *cl;
#ifdef TCP_SUPPORT
socket_t newsocket;
#endif
socket_t *socket;
netadr_t address;
msg_t msg;
qbyte msgData[MAX_MSGLEN];
socket_t* sockets [] =
{
&tvs.socket_udp,
&tvs.socket_udp6,
};
#ifdef TCP_SUPPORT
if( tvs.socket_tcp.open )
{
while( qtrue )
{
// find a free slot
for( i = 0; i < MAX_INCOMING_CONNECTIONS; i++ )
{
if( !tvs.incoming[i].active )
break;
}
if( i == MAX_INCOMING_CONNECTIONS )
break;
if( ( ret = NET_Accept( &tvs.socket_tcp, &newsocket, &address ) ) == 0 )
break;
if( ret == -1 )
{
Com_Printf( "NET_Accept: Error: %s\n", NET_ErrorString() );
continue;
}
tvs.incoming[i].active = qtrue;
tvs.incoming[i].socket = newsocket;
tvs.incoming[i].address = address;
tvs.incoming[i].time = tvs.realtime;
}
}
for( i = 0; i < MAX_INCOMING_CONNECTIONS; i++ )
{
if( !tvs.incoming[i].active )
continue;
ret = NET_GetPacket( &tvs.incoming[i].socket, &address, &msg );
if( ret == -1 )
{
NET_CloseSocket( &tvs.incoming[i].socket );
tvs.incoming[i].active = qfalse;
}
else if( ret == 1 )
{
if( *(int *)msg.data != -1 )
{ // sequence packet without upstreams
NET_CloseSocket( &tvs.incoming[i].socket );
tvs.incoming[i].active = qfalse;
continue;
}
TV_Downstream_UpstreamlessPacket( &tvs.incoming[i].socket, &address, &msg );
}
}
#endif
MSG_Init( &msg, msgData, sizeof( msgData ) );
for( socketind = 0; socketind < sizeof( sockets ) / sizeof( sockets[0] ); socketind++ )
{
socket = sockets[socketind];
while( socket->open && ( ret = NET_GetPacket( socket, &address, &msg ) ) != 0 )
{
if( ret == -1 )
{
Com_Printf( "NET_GetPacket: Error: %s\n", NET_ErrorString() );
continue;
}
// check for upstreamless packet (0xffffffff) first
if( *(int *)msg.data == -1 )
{
TV_Downstream_UpstreamlessPacket( socket, &address, &msg );
continue;
}
// read the game port out of the message so we can fix up
// stupid address translating routers
MSG_BeginReading( &msg );
MSG_ReadLong( &msg ); // sequence number
MSG_ReadLong( &msg ); // sequence number
game_port = MSG_ReadShort( &msg ) & 0xffff;
// data follows
// check for packets from connected clients
for( i = 0, cl = tvs.clients; i < tv_maxclients->integer; i++, cl++ )
{
unsigned short remoteaddr_port, addr_port;
if( cl->state == CS_FREE || cl->state == CS_ZOMBIE )
continue;
if( !NET_CompareBaseAddress( &address, &cl->netchan.remoteAddress ) )
continue;
if( cl->netchan.game_port != game_port )
continue;
remoteaddr_port = NET_GetAddressPort( &cl->netchan.remoteAddress );
addr_port = NET_GetAddressPort( &address );
if( remoteaddr_port != addr_port )
{
Com_DPrintf( "%s" S_COLOR_WHITE ": Fixing up a translated port from %i to %i\n", cl->name,
remoteaddr_port, addr_port );
NET_SetAddressPort( &cl->netchan.remoteAddress, addr_port );
}
if( TV_Downstream_ProcessPacket( &cl->netchan, &msg ) )
{ // this is a valid, sequenced packet, so process it
cl->lastPacketReceivedTime = tvs.realtime;
TV_Downstream_ParseClientMessage( cl, &msg );
}
break;
}
}
}
// handle clients with individual sockets
for( i = 0; i < tv_maxclients->integer; i++ )
{
cl = &tvs.clients[i];
if( cl->state == CS_ZOMBIE || cl->state == CS_FREE )
continue;
if( !cl->individual_socket )
continue;
// not while, we only handle one packet per client at a time here
if( ( ret = NET_GetPacket( cl->netchan.socket, &address, &msg ) ) != 0 )
{
if( ret == -1 )
{
Com_Printf( "%s" S_COLOR_WHITE ": Error receiving packet: %s\n", cl->name, NET_ErrorString() );
if( cl->reliable )
TV_Downstream_DropClient( cl, DROP_TYPE_GENERAL, "Error receiving packet: %s", NET_ErrorString() );
}
else
{
if( *(int *)msg.data == -1 )
{
TV_Downstream_UpstreamlessPacket( cl->netchan.socket, &address, &msg );
}
else
{
if( TV_Downstream_ProcessPacket( &cl->netchan, &msg ) )
{
cl->lastPacketReceivedTime = tvs.realtime;
TV_Downstream_ParseClientMessage( cl, &msg );
}
}
}
}
}
}
