/**
* Read all incoming data from the server
*/
int CL_ReadFromServer(void) {
int ret;
cl.oldtime = cl.time;
cl.time += host_frametime;
do {
ret = CL_GetMessage();
if (ret == -1)
Host_Error("CL_ReadFromServer: lost server connection");
if (!ret)
break;
cl.last_received_message = realtime;
CL_ParseServerMessage();
} while (ret && cls.state == ca_connected);
if (cl_shownet.getBool())
Con_Printf("\n");
CL_RelinkEntities();
CL_UpdateTEnts();
// bring the links up to date
return 0;
}
/*
=================
CL_ReadNetMessage
=================
*/
void CL_ReadNetMessage( void )
{
size_t curSize;
while( CL_GetMessage( net_message_buffer, &curSize ))
{
BF_Init( &net_message, "ServerData", net_message_buffer, curSize );
// check for connectionless packet (0xffffffff) first
if( BF_GetMaxBytes( &net_message ) >= 4 && *(int *)net_message.pData == -1 )
{
CL_ConnectionlessPacket( net_from, &net_message );
continue;
}
// can't be a valid sequenced packet
if( cls.state < ca_connected ) continue;
if( BF_GetMaxBytes( &net_message ) < 8 )
{
MsgDev( D_WARN, "%s: runt packet\n", NET_AdrToString( net_from ));
continue;
}
// packet from server
if( !cls.demoplayback && !NET_CompareAdr( net_from, cls.netchan.remote_address ))
{
MsgDev( D_ERROR, "CL_ReadPackets: %s:sequenced packet without connection\n", NET_AdrToString( net_from ));
continue;
}
if( !cls.demoplayback && !Netchan_Process( &cls.netchan, &net_message ))
continue; // wasn't accepted for some reason
CL_ParseServerMessage( &net_message );
}
// check for fragmentation/reassembly related packets.
if( cls.state != ca_disconnected && Netchan_IncomingReady( &cls.netchan ))
{
// the header is different lengths for reliable and unreliable messages
int headerBytes = BF_GetNumBytesRead( &net_message );
// process the incoming buffer(s)
if( Netchan_CopyNormalFragments( &cls.netchan, &net_message ))
{
CL_ParseServerMessage( &net_message );
}
if( Netchan_CopyFileFragments( &cls.netchan, &net_message ))
{
// remove from resource request stuff.
CL_ProcessFile( true, cls.netchan.incomingfilename );
}
}
Netchan_UpdateProgress( &cls.netchan );
}
/*
==================
CL_KeepaliveMessage
When the client is taking a long time to load stuff, send keepalive messages
so the server doesn't disconnect.
==================
*/
void CL_KeepaliveMessage (void)
{
float time;
static float lastmsg;
int ret;
sizebuf_t old;
byte* olddata;
if (sv.active)
return; // no need if server is local
if (cls.demoplayback)
return;
// read messages from server, should just be nops
old = net_message;
olddata = Sys_BigStackAlloc(8192 * sizeof(byte), "CL_KeepaliveMessage");
memcpy (olddata, net_message.data, net_message.cursize);
do
{
ret = CL_GetMessage ();
switch (ret)
{
default:
Host_Error ("CL_KeepaliveMessage: CL_GetMessage failed");
case 0:
break; // nothing waiting
case 1:
Host_Error ("CL_KeepaliveMessage: received a message");
break;
case 2:
if (MSG_ReadByte() != svc_nop)
Host_Error ("CL_KeepaliveMessage: datagram wasn't a nop");
break;
}
} while (ret);
net_message = old;
memcpy (net_message.data, olddata, net_message.cursize);
// check time
time = Sys_FloatTime ();
if (time - lastmsg < 5)
{
Sys_BigStackFree(8192 * sizeof(byte), "CL_KeepaliveMessage");
return;
}
lastmsg = time;
// write out a nop
Con_Printf ("--> client to server keepalive\n");
MSG_WriteByte (&cls.message, clc_nop);
NET_SendMessage (cls.netcon, &cls.message);
SZ_Clear (&cls.message);
Sys_BigStackFree(8192 * sizeof(byte), "CL_KeepaliveMessage");
}
/*
==================
CL_KeepaliveMessage
When the client is taking a long time to load stuff, send keepalive messages
so the server doesn't disconnect.
==================
*/
static void CL_KeepaliveMessage (void)
{
float time;
static float lastmsg;
int ret;
sizebuf_t old;
byte olddata[NET_MAXMESSAGE];
if (sv.active)
return; // no need if server is local
if (cls.demoplayback)
return;
// read messages from server, should just be nops
old = net_message;
memcpy (olddata, net_message.data, net_message.cursize);
do
{
ret = CL_GetMessage ();
switch (ret)
{
default:
Host_Error ("%s: CL_GetMessage failed", __thisfunc__);
case 0:
break; // nothing waiting
case 1:
Host_Error ("%s: received a message", __thisfunc__);
break;
case 2:
if (MSG_ReadByte() != svc_nop)
Host_Error ("%s: datagram wasn't a nop", __thisfunc__);
break;
}
} while (ret);
net_message = old;
memcpy (net_message.data, olddata, net_message.cursize);
// check time
time = Sys_DoubleTime ();
if (time - lastmsg < 5)
return;
lastmsg = time;
// write out a nop
Con_Printf ("--> client to server keepalive\n");
MSG_WriteByte (&cls.message, clc_nop);
NET_SendMessage (cls.netcon, &cls.message);
SZ_Clear (&cls.message);
}