/* ======================= SV_SendClientDatagram ======================= */ void SV_SendClientDatagram( sv_client_t *cl ) { byte msg_buf[NET_MAX_PAYLOAD]; sizebuf_t msg; svs.currentPlayer = cl; svs.currentPlayerNum = (cl - svs.clients); BF_Init( &msg, "Datagram", msg_buf, sizeof( msg_buf )); // always send servertime at new frame BF_WriteByte( &msg, svc_time ); BF_WriteFloat( &msg, sv.time ); SV_WriteClientdataToMessage( cl, &msg ); SV_WriteEntitiesToClient( cl, &msg ); // copy the accumulated multicast datagram // for this client out to the message if( BF_CheckOverflow( &cl->datagram )) MsgDev( D_WARN, "datagram overflowed for %s\n", cl->name ); else BF_WriteBits( &msg, BF_GetData( &cl->datagram ), BF_GetNumBitsWritten( &cl->datagram )); BF_Clear( &cl->datagram ); if( BF_CheckOverflow( &msg )) { // must have room left for the packet header MsgDev( D_WARN, "msg overflowed for %s\n", cl->name ); BF_Clear( &msg ); } // send the datagram Netchan_TransmitBits( &cl->netchan, BF_GetNumBitsWritten( &msg ), BF_GetData( &msg )); }
/* ================= CL_FlushEntityPacket ================= */ void CL_FlushEntityPacket( sizebuf_t *msg ) { int newnum; entity_state_t from, to; MsgDev( D_INFO, "FlushEntityPacket()\n" ); Q_memset( &from, 0, sizeof( from )); cl.frames[cl.parsecountmod].valid = false; cl.validsequence = 0; // can't render a frame // read it all, but ignore it while( 1 ) { newnum = BF_ReadWord( msg ); if( !newnum ) break; // done if( BF_CheckOverflow( msg )) Host_Error( "CL_FlushEntityPacket: read overflow\n" ); MSG_ReadDeltaEntity( msg, &from, &to, newnum, CL_IsPlayerIndex( newnum ), cl.mtime[0] ); } }
/* ================== CL_ParsePacketEntities An svc_packetentities has just been parsed, deal with the rest of the data stream. ================== */ void CL_ParsePacketEntities( sizebuf_t *msg, qboolean delta ) { frame_t *newframe, *oldframe; int oldindex, newnum, oldnum; int oldpacket, newpacket; cl_entity_t *player; entity_state_t *oldent; int i, count; // save first uncompressed packet as timestamp if( cls.changelevel && !delta && cls.demorecording ) CL_WriteDemoJumpTime(); // first, allocate packet for new frame count = BF_ReadWord( msg ); newpacket = cl.parsecountmod; newframe = &cl.frames[newpacket]; // allocate parse entities newframe->first_entity = cls.next_client_entities; newframe->num_entities = 0; newframe->valid = true; // assume valid if( delta ) { int subtracted; oldpacket = BF_ReadByte( msg ); subtracted = ((( cls.netchan.incoming_sequence & 0xFF ) - oldpacket ) & 0xFF ); if( subtracted == 0 ) { Host_Error( "CL_DeltaPacketEntities: update too old, connection dropped.\n" ); return; } if( subtracted >= CL_UPDATE_MASK ) { // we can't use this, it is too old Con_NPrintf( 2, "^3Warning:^1 delta frame is too old^7\n" ); CL_FlushEntityPacket( msg ); return; } oldframe = &cl.frames[oldpacket & CL_UPDATE_MASK]; if(( cls.next_client_entities - oldframe->first_entity ) > ( cls.num_client_entities - 128 )) { Con_NPrintf( 2, "^3Warning:^1 delta frame is too old^7\n" ); CL_FlushEntityPacket( msg ); return; } } else { // this is a full update that we can start delta compressing from now oldframe = NULL; oldpacket = -1; // delta too old or is initial message cl.force_send_usercmd = true; // send reply cls.demowaiting = false; // we can start recording now } // mark current delta state cl.validsequence = cls.netchan.incoming_sequence; oldent = NULL; oldindex = 0; if( !oldframe ) { oldnum = MAX_ENTNUMBER; } else { if( oldindex >= oldframe->num_entities ) { oldnum = MAX_ENTNUMBER; } else { oldent = &cls.packet_entities[(oldframe->first_entity+oldindex) % cls.num_client_entities]; oldnum = oldent->number; } } while( 1 ) { newnum = BF_ReadWord( msg ); if( !newnum ) break; // end of packet entities if( BF_CheckOverflow( msg )) Host_Error( "CL_ParsePacketEntities: read overflow\n" ); while( oldnum < newnum ) { // one or more entities from the old packet are unchanged CL_DeltaEntity( msg, newframe, oldnum, oldent, true ); oldindex++; if( oldindex >= oldframe->num_entities ) { oldnum = MAX_ENTNUMBER; } else { oldent = &cls.packet_entities[(oldframe->first_entity+oldindex) % cls.num_client_entities]; oldnum = oldent->number; } } if( oldnum == newnum ) { // delta from previous state CL_DeltaEntity( msg, newframe, newnum, oldent, false ); oldindex++; if( oldindex >= oldframe->num_entities ) { oldnum = MAX_ENTNUMBER; } else { oldent = &cls.packet_entities[(oldframe->first_entity+oldindex) % cls.num_client_entities]; oldnum = oldent->number; } continue; } if( oldnum > newnum ) { // delta from baseline ? CL_DeltaEntity( msg, newframe, newnum, NULL, false ); continue; } } // any remaining entities in the old frame are copied over while( oldnum != MAX_ENTNUMBER ) { // one or more entities from the old packet are unchanged CL_DeltaEntity( msg, newframe, oldnum, oldent, true ); oldindex++; if( oldindex >= oldframe->num_entities ) { oldnum = MAX_ENTNUMBER; } else { oldent = &cls.packet_entities[(oldframe->first_entity+oldindex) % cls.num_client_entities]; oldnum = oldent->number; } } cl.frame = *newframe; if( !cl.frame.valid ) return; player = CL_GetLocalPlayer(); if( cls.state != ca_active ) { // client entered the game cls.state = ca_active; cl.force_refdef = true; cls.changelevel = false; // changelevel is done cls.changedemo = false; // changedemo is done SCR_MakeLevelShot(); // make levelshot if needs Cvar_SetFloat( "scr_loading", 0.0f ); // reset progress bar if(( cls.demoplayback || cls.disable_servercount != cl.servercount ) && cl.video_prepped ) SCR_EndLoadingPlaque(); // get rid of loading plaque } // update local player states clgame.dllFuncs.pfnTxferLocalOverrides( &player->curstate, &newframe->local.client ); // update state for all players for( i = 0; i < cl.maxclients; i++ ) { cl_entity_t *ent = CL_GetEntityByIndex( i + 1 ); if( !ent ) continue; clgame.dllFuncs.pfnProcessPlayerState( &newframe->playerstate[i], &ent->curstate ); newframe->playerstate[i].number = ent->index; } cl.frame = *newframe; }
/* ===================== CL_ParseServerMessage ===================== */ void CL_ParseServerMessage( sizebuf_t *msg ) { char *s; int i, j, cmd; int param1, param2; int bufStart; cls_message_debug.parsing = true; // begin parsing starting_count = BF_GetNumBytesRead( msg ); // updates each frame // parse the message while( 1 ) { if( BF_CheckOverflow( msg )) { Host_Error( "CL_ParseServerMessage: overflow!\n" ); return; } // mark start position bufStart = BF_GetNumBytesRead( msg ); // end of message if( BF_GetNumBitsLeft( msg ) < 8 ) break; cmd = BF_ReadByte( msg ); // record command for debugging spew on parse problem CL_Parse_RecordCommand( cmd, bufStart ); // other commands switch( cmd ) { case svc_bad: Host_Error( "svc_bad\n" ); break; case svc_nop: // this does nothing break; case svc_disconnect: MsgDev( D_INFO, "Disconnected from server\n" ); CL_Drop (); Host_AbortCurrentFrame (); break; case svc_changing: if( BF_ReadOneBit( msg )) { cls.changelevel = true; S_StopAllSounds(); if( cls.demoplayback ) { SCR_BeginLoadingPlaque( cl.background ); cls.changedemo = true; } } else MsgDev( D_INFO, "Server disconnected, reconnecting\n" ); CL_ClearState (); CL_InitEdicts (); // re-arrange edicts if( cls.demoplayback ) { cl.background = (cls.demonum != -1) ? true : false; cls.state = ca_connected; } else cls.state = ca_connecting; cls.connect_time = MAX_HEARTBEAT; // CL_CheckForResend() will fire immediately break; case svc_setview: cl.refdef.viewentity = BF_ReadWord( msg ); break; case svc_sound: CL_ParseSoundPacket( msg, false ); break; case svc_time: // shuffle timestamps cl.mtime[1] = cl.mtime[0]; cl.mtime[0] = BF_ReadFloat( msg ); break; case svc_print: i = BF_ReadByte( msg ); MsgDev( D_INFO, "^6%s", BF_ReadString( msg )); if( i == PRINT_CHAT ) S_StartLocalSound( "common/menu2.wav", VOL_NORM, false ); break; case svc_stufftext: CL_ParseStuffText( msg ); break; case svc_lightstyle: CL_ParseLightStyle( msg ); break; case svc_setangle: CL_ParseSetAngle( msg ); break; case svc_serverdata: Cbuf_Execute(); // make sure any stuffed commands are done CL_ParseServerData( msg ); break; case svc_addangle: CL_ParseAddAngle( msg ); break; case svc_clientdata: CL_ParseClientData( msg ); break; case svc_packetentities: CL_ParsePacketEntities( msg, false ); break; case svc_deltapacketentities: CL_ParsePacketEntities( msg, true ); break; case svc_updatepings: CL_UpdateUserPings( msg ); break; case svc_usermessage: CL_RegisterUserMessage( msg ); break; case svc_particle: CL_ParseParticles( msg ); break; case svc_restoresound: CL_ParseRestoreSoundPacket( msg ); break; case svc_spawnstatic: CL_ParseStaticEntity( msg ); break; case svc_ambientsound: CL_ParseSoundPacket( msg, true ); break; case svc_crosshairangle: CL_ParseCrosshairAngle( msg ); break; case svc_spawnbaseline: CL_ParseBaseline( msg ); break; case svc_temp_entity: CL_ParseTempEntity( msg ); break; case svc_setpause: cl.refdef.paused = ( BF_ReadOneBit( msg ) != 0 ); break; case svc_deltamovevars: CL_ParseMovevars( msg ); break; case svc_customization: CL_ParseCustomization( msg ); break; case svc_centerprint: CL_CenterPrint( BF_ReadString( msg ), 0.25f ); break; case svc_event: CL_ParseEvent( msg ); break; case svc_event_reliable: CL_ParseReliableEvent( msg ); break; case svc_updateuserinfo: CL_UpdateUserinfo( msg ); break; case svc_intermission: cl.refdef.intermission = true; break; case svc_modelindex: CL_PrecacheModel( msg ); break; case svc_soundindex: CL_PrecacheSound( msg ); break; case svc_soundfade: CL_ParseSoundFade( msg ); break; case svc_cdtrack: param1 = BF_ReadByte( msg ); param1 = bound( 1, param1, MAX_CDTRACKS ); // tracknum param2 = BF_ReadByte( msg ); param2 = bound( 1, param2, MAX_CDTRACKS ); // loopnum S_StartBackgroundTrack( clgame.cdtracks[param1-1], clgame.cdtracks[param2-1], 0 ); break; case svc_serverinfo: CL_ServerInfo( msg ); break; case svc_eventindex: CL_PrecacheEvent( msg ); break; case svc_deltatable: Delta_ParseTableField( msg ); break; case svc_weaponanim: param1 = BF_ReadByte( msg ); // iAnim param2 = BF_ReadByte( msg ); // body CL_WeaponAnim( param1, param2 ); break; case svc_bspdecal: CL_ParseStaticDecal( msg ); break; case svc_roomtype: param1 = BF_ReadShort( msg ); Cvar_SetFloat( "room_type", param1 ); break; case svc_chokecount: i = BF_ReadByte( msg ); j = cls.netchan.incoming_acknowledged - 1; for( ; i > 0 && j > cls.netchan.outgoing_sequence - CL_UPDATE_BACKUP; j-- ) { if( cl.frames[j & CL_UPDATE_MASK].receivedtime != -3.0 ) { cl.frames[j & CL_UPDATE_MASK].receivedtime = -2.0; i--; } } break; case svc_resourcelist: CL_ParseResourceList( msg ); break; case svc_director: CL_ParseDirector( msg ); break; case svc_studiodecal: CL_ParseStudioDecal( msg ); break; case svc_querycvarvalue: CL_ParseCvarValue( msg ); break; case svc_querycvarvalue2: CL_ParseCvarValue2( msg ); break; default: CL_ParseUserMessage( msg, cmd ); break; } } cls_message_debug.parsing = false; // done // we don't know if it is ok to save a demo message until // after we have parsed the frame if( !cls.demoplayback ) { if( cls.demorecording && !cls.demowaiting ) { CL_WriteDemoMessage( false, starting_count, msg ); } else if( cls.state != ca_active ) { CL_WriteDemoMessage( true, starting_count, msg ); } } }
/* =================== CL_WritePacket Create and send the command packet to the server Including both the reliable commands and the usercmds =================== */ void CL_WritePacket( void ) { sizebuf_t buf; qboolean send_command = false; byte data[MAX_CMD_BUFFER]; int i, from, to, key, size; int numbackup = 2; int numcmds; int newcmds; int cmdnumber; // don't send anything if playing back a demo if( cls.demoplayback || cls.state == ca_cinematic ) return; if( cls.state == ca_disconnected || cls.state == ca_connecting ) return; CL_ComputePacketLoss (); #ifndef _DEBUG if( cl_cmdrate->value < MIN_CMD_RATE ) { Cvar_SetFloat( "cl_cmdrate", MIN_CMD_RATE ); } #endif Q_memset( data, 0, MAX_CMD_BUFFER ); BF_Init( &buf, "ClientData", data, sizeof( data )); // Determine number of backup commands to send along numbackup = bound( 0, cl_cmdbackup->integer, MAX_BACKUP_COMMANDS ); if( cls.state == ca_connected ) numbackup = 0; // Check to see if we can actually send this command // In single player, send commands as fast as possible // Otherwise, only send when ready and when not choking bandwidth if(( cl.maxclients == 1 ) || ( NET_IsLocalAddress( cls.netchan.remote_address ) && !host_limitlocal->integer )) send_command = true; else if(( host.realtime >= cls.nextcmdtime ) && Netchan_CanPacket( &cls.netchan )) send_command = true; if( cl.force_send_usercmd ) { send_command = true; cl.force_send_usercmd = false; } if(( cls.netchan.outgoing_sequence - cls.netchan.incoming_acknowledged ) >= CL_UPDATE_MASK ) { if(( host.realtime - cls.netchan.last_received ) > CONNECTION_PROBLEM_TIME ) { Con_NPrintf( 1, "^3Warning:^1 Connection Problem^7\n" ); cl.validsequence = 0; } } if( cl_nodelta->integer ) { cl.validsequence = 0; } // send a userinfo update if needed if( userinfo->modified ) { BF_WriteByte( &cls.netchan.message, clc_userinfo ); BF_WriteString( &cls.netchan.message, Cvar_Userinfo( )); } if( send_command ) { int outgoing_sequence; if( cl_cmdrate->integer > 0 ) cls.nextcmdtime = host.realtime + ( 1.0f / cl_cmdrate->value ); else cls.nextcmdtime = host.realtime; // always able to send right away if( cls.lastoutgoingcommand == -1 ) { outgoing_sequence = cls.netchan.outgoing_sequence; cls.lastoutgoingcommand = cls.netchan.outgoing_sequence; } else outgoing_sequence = cls.lastoutgoingcommand + 1; // begin a client move command BF_WriteByte( &buf, clc_move ); // save the position for a checksum byte key = BF_GetRealBytesWritten( &buf ); BF_WriteByte( &buf, 0 ); // write packet lossage percentation BF_WriteByte( &buf, cls.packet_loss ); // say how many backups we'll be sending BF_WriteByte( &buf, numbackup ); // how many real commands have queued up newcmds = ( cls.netchan.outgoing_sequence - cls.lastoutgoingcommand ); // put an upper/lower bound on this newcmds = bound( 0, newcmds, MAX_TOTAL_CMDS ); if( cls.state == ca_connected ) newcmds = 0; BF_WriteByte( &buf, newcmds ); numcmds = newcmds + numbackup; from = -1; for( i = numcmds - 1; i >= 0; i-- ) { cmdnumber = ( cls.netchan.outgoing_sequence - i ) & CL_UPDATE_MASK; to = cmdnumber; CL_WriteUsercmd( &buf, from, to ); from = to; if( BF_CheckOverflow( &buf )) Host_Error( "CL_Move, overflowed command buffer (%i bytes)\n", MAX_CMD_BUFFER ); } // calculate a checksum over the move commands size = BF_GetRealBytesWritten( &buf ) - key - 1; buf.pData[key] = CRC32_BlockSequence( buf.pData + key + 1, size, cls.netchan.outgoing_sequence ); // message we are constructing. i = cls.netchan.outgoing_sequence & CL_UPDATE_MASK; // determine if we need to ask for a new set of delta's. if( cl.validsequence && (cls.state == ca_active) && !( cls.demorecording && cls.demowaiting )) { cl.delta_sequence = cl.validsequence; BF_WriteByte( &buf, clc_delta ); BF_WriteByte( &buf, cl.validsequence & 0xFF ); } else { // request delta compression of entities cl.delta_sequence = -1; } if( BF_CheckOverflow( &buf )) { Host_Error( "CL_Move, overflowed command buffer (%i bytes)\n", MAX_CMD_BUFFER ); } // remember outgoing command that we are sending cls.lastoutgoingcommand = cls.netchan.outgoing_sequence; // composite the rest of the datagram.. if( BF_GetNumBitsWritten( &cls.datagram ) <= BF_GetNumBitsLeft( &buf )) BF_WriteBits( &buf, BF_GetData( &cls.datagram ), BF_GetNumBitsWritten( &cls.datagram )); BF_Clear( &cls.datagram ); // deliver the message (or update reliable) Netchan_Transmit( &cls.netchan, BF_GetNumBytesWritten( &buf ), BF_GetData( &buf )); } else { // increment sequence number so we can detect that we've held back packets. cls.netchan.outgoing_sequence++; } if( cls.demorecording ) { // Back up one because we've incremented outgoing_sequence each frame by 1 unit cmdnumber = ( cls.netchan.outgoing_sequence - 1 ) & CL_UPDATE_MASK; CL_WriteDemoUserCmd( cmdnumber ); } // update download/upload slider. Netchan_UpdateProgress( &cls.netchan ); }
/* ======================= SV_SendClientMessages ======================= */ void SV_SendClientMessages( void ) { sv_client_t *cl; int i; svs.currentPlayer = NULL; svs.currentPlayerNum = 0; if( sv.state == ss_dead ) return; SV_UpdateToReliableMessages (); // send a message to each connected client for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ ) { if( !cl->state || cl->fakeclient ) continue; if( cl->skip_message ) { cl->skip_message = false; continue; } if( !host_limitlocal->integer && NET_IsLocalAddress( cl->netchan.remote_address )) cl->send_message = true; if( cl->state == cs_spawned ) { // Try to send a message as soon as we can. // If the target time for sending is within the next frame interval ( based on last frame ), // trigger the send now. Note that in single player, // send_message is also set to true any time a packet arrives from the client. float time_unti_next_message = cl->next_messagetime - (host.realtime + host.frametime); if( time_unti_next_message <= 0.0f ) cl->send_message = true; // something got hosed if( time_unti_next_message > 2.0f ) cl->send_message = true; } // if the reliable message overflowed, drop the client if( BF_CheckOverflow( &cl->netchan.message )) { BF_Clear( &cl->netchan.message ); BF_Clear( &cl->datagram ); SV_BroadcastPrintf( PRINT_HIGH, "%s overflowed\n", cl->name ); MsgDev( D_WARN, "reliable overflow for %s\n", cl->name ); SV_DropClient( cl ); cl->send_message = true; cl->netchan.cleartime = 0; // don't choke this message } else if( cl->send_message ) { // If we haven't gotten a message in sv_failuretime seconds, then stop sending messages to this client // until we get another packet in from the client. This prevents crash/drop and reconnect where they are // being hosed with "sequenced packet without connection" packets. if(( host.realtime - cl->netchan.last_received ) > sv_failuretime->value ) cl->send_message = false; } // only send messages if the client has sent one // and the bandwidth is not choked if( !cl->send_message ) continue; // Bandwidth choke active? if( !Netchan_CanPacket( &cl->netchan )) { cl->chokecount++; continue; } cl->send_message = false; // Now that we were able to send, reset timer to point to next possible send time. cl->next_messagetime = host.realtime + host.frametime + cl->cl_updaterate; if( cl->state == cs_spawned ) { SV_SendClientDatagram( cl ); } else { // just update reliable Netchan_Transmit( &cl->netchan, 0, NULL ); } } // reset current client svs.currentPlayer = NULL; svs.currentPlayerNum = 0; }
/* ======================= SV_UpdateToReliableMessages ======================= */ void SV_UpdateToReliableMessages( void ) { int i; sv_client_t *cl; // check for changes to be sent over the reliable streams to all clients for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ ) { if( !cl->edict ) continue; // not in game yet if( cl->state != cs_spawned ) continue; if( cl->sendinfo ) { cl->sendinfo = false; SV_FullClientUpdate( cl, &sv.reliable_datagram ); } if( cl->sendmovevars ) { cl->sendmovevars = false; SV_FullUpdateMovevars( cl, &cl->netchan.message ); } } // 1% chanse for simulate random network bugs if( sv.write_bad_message && Com_RandomLong( 0, 512 ) == 404 ) { // just for network debugging (send only for local client) BF_WriteByte( &sv.datagram, svc_bad ); BF_WriteLong( &sv.datagram, rand( )); // send some random data BF_WriteString( &sv.datagram, host.finalmsg ); // send final message sv.write_bad_message = false; } // clear the server datagram if it overflowed. if( BF_CheckOverflow( &sv.datagram )) { MsgDev( D_ERROR, "sv.datagram overflowed!\n" ); BF_Clear( &sv.datagram ); } // clear the server datagram if it overflowed. if( BF_CheckOverflow( &sv.spectator_datagram )) { MsgDev( D_ERROR, "sv.spectator_datagram overflowed!\n" ); BF_Clear( &sv.spectator_datagram ); } // now send the reliable and server datagrams to all clients. for( i = 0, cl = svs.clients; i < sv_maxclients->integer; i++, cl++ ) { if( cl->state < cs_connected || cl->fakeclient ) continue; // reliables go to all connected or spawned BF_WriteBits( &cl->netchan.message, BF_GetData( &sv.reliable_datagram ), BF_GetNumBitsWritten( &sv.reliable_datagram )); BF_WriteBits( &cl->datagram, BF_GetData( &sv.datagram ), BF_GetNumBitsWritten( &sv.datagram )); if( cl->hltv_proxy ) { BF_WriteBits( &cl->datagram, BF_GetData( &sv.spectator_datagram ), BF_GetNumBitsWritten( &sv.spectator_datagram )); } } // now clear the reliable and datagram buffers. BF_Clear( &sv.spectator_datagram ); BF_Clear( &sv.reliable_datagram ); BF_Clear( &sv.datagram ); }
/* =============== Netchan_TransmitBits tries to send an unreliable message to a connection, and handles the transmition / retransmition of the reliable messages. A 0 length will still generate a packet and deal with the reliable messages. ================ */ void Netchan_TransmitBits( netchan_t *chan, int length, byte *data ) { sizebuf_t send; byte send_buf[NET_MAX_MESSAGE]; qboolean send_reliable_fragment; qboolean send_resending = false; qboolean send_reliable; size_t size1, size2; uint w1, w2, hdr_size; int i, j; float fRate; // check for message overflow // check for message overflow if( BF_CheckOverflow( &chan->message )) { MsgDev( D_ERROR, "%s:outgoing message overflow\n", NET_AdrToString( chan->remote_address )); return; } // if the remote side dropped the last reliable message, resend it send_reliable = false; if( chan->incoming_acknowledged > chan->last_reliable_sequence && chan->incoming_reliable_acknowledged != chan->reliable_sequence ) { send_reliable = true; send_resending = true; } // A packet can have "reliable payload + frag payload + unreliable payload // frag payload can be a file chunk, if so, it needs to be parsed on the receiving end and reliable payload + unreliable payload need // to be passed on to the message queue. The processing routine needs to be able to handle the case where a message comes in and a file // transfer completes // if the reliable transmit buffer is empty, copy the current message out if( !chan->reliable_length ) { qboolean send_frag = false; fragbuf_t *pbuf; // will be true if we are active and should let chan->message get some bandwidth int send_from_frag[MAX_STREAMS] = { 0, 0 }; int send_from_regular = false; // if we have data in the waiting list(s) and we have cleared the current queue(s), then // push the waitlist(s) into the current queue(s) Netchan_FragSend( chan ); // sending regular payload send_from_regular = BF_GetNumBytesWritten( &chan->message ) ? 1 : 0; // check to see if we are sending a frag payload for( i = 0; i < MAX_STREAMS; i++ ) { if( chan->fragbufs[i] ) { send_from_frag[i] = 1; } } // stall reliable payloads if sending from frag buffer if( send_from_regular && ( send_from_frag[FRAG_NORMAL_STREAM] )) { send_from_regular = false; // if the reliable buffer has gotten too big, queue it at the end of everything and clear out buffer if( BF_GetNumBytesWritten( &chan->message ) > MAX_RELIABLE_PAYLOAD ) { Netchan_CreateFragments(( chan->sock == NS_SERVER ), chan, &chan->message ); BF_Clear( &chan->message ); } } // startpos will be zero if there is no regular payload for( i = 0; i < MAX_STREAMS; i++ ) { chan->frag_startpos[i] = 0; // assume no fragment is being sent chan->reliable_fragment[i] = 0; chan->reliable_fragid[i] = 0; chan->frag_length[i] = 0; if( send_from_frag[i] ) { send_frag = true; } } if( send_from_regular || send_frag ) { chan->reliable_sequence ^= 1; send_reliable = true; } if( send_from_regular ) { Q_memcpy( chan->reliable_buf, chan->message_buf, BF_GetNumBytesWritten( &chan->message )); chan->reliable_length = BF_GetNumBitsWritten( &chan->message ); BF_Clear( &chan->message ); // if we send fragments, this is where they'll start for( i = 0; i < MAX_STREAMS; i++ ) { chan->frag_startpos[i] = chan->reliable_length; } } for( i = 0; i < MAX_STREAMS; i++ ) { int fragment_size; int newpayloadsize; // is there someting in the fragbuf? pbuf = chan->fragbufs[i]; fragment_size = 0; if( pbuf ) { fragment_size = BF_GetNumBytesWritten( &pbuf->frag_message ); // files set size a bit differently. if( pbuf->isfile && !pbuf->isbuffer ) { fragment_size = pbuf->size; } } newpayloadsize = (( chan->reliable_length + ( fragment_size << 3 )) + 7 ) >> 3; // make sure we have enought space left if( send_from_frag[i] && pbuf && ( newpayloadsize < MAX_RELIABLE_PAYLOAD )) { sizebuf_t temp; // which buffer are we sending ? chan->reliable_fragid[i] = MAKE_FRAGID( pbuf->bufferid, chan->fragbufcount[i] ); // if it's not in-memory, then we'll need to copy it in frame the file handle. if( pbuf->isfile && !pbuf->isbuffer ) { byte filebuffer[2048]; file_t *hfile; hfile = FS_Open( pbuf->filename, "rb", false ); FS_Seek( hfile, pbuf->foffset, SEEK_SET ); FS_Read( hfile, filebuffer, pbuf->size ); BF_WriteBits( &pbuf->frag_message, filebuffer, pbuf->size << 3 ); FS_Close( hfile ); } // copy frag stuff on top of current buffer BF_StartWriting( &temp, chan->reliable_buf, sizeof( chan->reliable_buf ), chan->reliable_length, -1 ); BF_WriteBits( &temp, BF_GetData( &pbuf->frag_message ), BF_GetNumBitsWritten( &pbuf->frag_message )); chan->reliable_length += BF_GetNumBitsWritten( &pbuf->frag_message ); chan->frag_length[i] = BF_GetNumBitsWritten( &pbuf->frag_message ); // unlink pbuf Netchan_UnlinkFragment( pbuf, &chan->fragbufs[i] ); chan->reliable_fragment[i] = 1; // offset the rest of the starting positions for( j = i + 1; j < MAX_STREAMS; j++ ) { chan->frag_startpos[j] += chan->frag_length[i]; } } } }