C++ CL_WritePacket函数代码示例

/*
=====================
CL_Disconnect

Called when a connection, or cinematic is being terminated.
Goes from a connected state to either a menu state or a console state
Sends a disconnect message to the server
This is also called on Com_Error and Com_Quit, so it shouldn't cause any errors
=====================
*/
void CL_Disconnect( void ) {
	if ( !com_cl_running || !com_cl_running->integer ) {
		return;
	}

	if (cls.uiStarted)
		UI_SetActiveMenu( NULL,NULL );

	SCR_StopCinematic ();
	S_ClearSoundBuffer();

	// send a disconnect message to the server
	// send it a few times in case one is dropped
	if ( cls.state >= CA_CONNECTED ) {
		CL_AddReliableCommand( "disconnect" );
		CL_WritePacket();
		CL_WritePacket();
		CL_WritePacket();
	}
	
	CL_ClearState ();

	CL_FreeReliableCommands();

	extern void CL_FreeServerCommands(void);
	CL_FreeServerCommands();

	memset( &clc, 0, sizeof( clc ) );

	cls.state = CA_DISCONNECTED;

	// allow cheats locally
	Cvar_Set( "timescale", "1" );//jic we were skipping
	Cvar_Set( "skippingCinematic", "0" );//jic we were skipping
}

/*
=====================
CL_Disconnect

Called when a connection, or cinematic is being terminated.
Goes from a connected state to either a menu state or a console state
Sends a disconnect message to the server
This is also called on Com_Error and Com_Quit, so it shouldn't cause any errors
=====================
*/
void CL_Disconnect( void ) {
	if ( !com_cl_running || !com_cl_running->integer ) {
		return;
	}

#ifdef _XBOX
	Cvar_Set("r_norefresh", "0");

	// Make sure to stop all rumbling! - Prevents bug when quitting game during rumble:
	extern void IN_KillRumbleScripts( void );
	IN_KillRumbleScripts();
#endif

	if (cls.uiStarted)
		UI_SetActiveMenu( NULL,NULL );

	SCR_StopCinematic ();
	S_ClearSoundBuffer();

#ifdef _XBOX
//	extern qboolean RE_RegisterImages_LevelLoadEnd(void);
//	RE_RegisterImages_LevelLoadEnd();
	R_DeleteTextures();
#endif

	// send a disconnect message to the server
	// send it a few times in case one is dropped
	if ( cls.state >= CA_CONNECTED ) {
		CL_AddReliableCommand( "disconnect" );
		CL_WritePacket();
		CL_WritePacket();
		CL_WritePacket();
	}
	
	CL_ClearState ();

	CL_FreeReliableCommands();

	extern void CL_FreeServerCommands(void);
	CL_FreeServerCommands();

	memset( &clc, 0, sizeof( clc ) );

	cls.state = CA_DISCONNECTED;

	// allow cheats locally
	Cvar_Set( "timescale", "1" );//jic we were skipping
	Cvar_Set( "skippingCinematic", "0" );//jic we were skipping
}

/*
=================
CL_SendCmd

Called every frame to builds and sends a command packet to the server.
=================
*/
void
CL_SendCmd(void)
{
  // don't send any message if not connected
  if (clc.state < CA_CONNECTED)
  {
    return;
  }

  // don't send commands if paused
  if (com_sv_running->integer && sv_paused->integer && cl_paused->integer)
  {
    return;
  }

  // we create commands even if a demo is playing,
  CL_CreateNewCommands();

  // don't send a packet if the last packet was sent too recently
  if (!CL_ReadyToSendPacket())
  {
    if (cl_showSend->integer)
    {
      Com_Printf(". ");
    }
    return;
  }

  CL_WritePacket();
}

/*
=================
CL_SendCmd

Called every frame to builds and sends a command packet to the server.
=================
*/
void CL_SendCmd( void )
{
	// we create commands even if a demo is playing,
	CL_CreateCmd();
	// clc_move, userinfo etc
	CL_WritePacket();

	// make sure what menu and CL_WritePacket catch changes
	userinfo->modified = false;
}

/*
=====================
CL_Disconnect

Called when a connection, or cinematic is being terminated.
Goes from a connected state to either a menu state or a console state
Sends a disconnect message to the server
This is also called on Com_Error and Com_Quit, so it shouldn't cause any errors
=====================
*/
void CL_Disconnect( void ) {
	int		i;

	if ( !com_cl_running || !com_cl_running->integer ) {
		return;
	}

	if (cls.uiStarted)
		UI_SetActiveMenu( NULL,NULL );

	SCR_StopCinematic ();
	S_ClearSoundBuffer();

	// send a disconnect message to the server
	// send it a few times in case one is dropped
	if ( cls.state >= CA_CONNECTED ) {
		CL_AddReliableCommand( "disconnect" );
		CL_WritePacket();
		CL_WritePacket();
		CL_WritePacket();
	}
	
	CL_ClearState ();

	// wipe the client connection
	for ( i = 0 ; i < MAX_RELIABLE_COMMANDS ; i++ ) {
		if ( clc.reliableCommands[i] ) {
			Z_Free( clc.reliableCommands[i] );
		}
	}
	memset( &clc, 0, sizeof( clc ) );

	cls.state = CA_DISCONNECTED;

	// allow cheats locally
	Cvar_Set( "timescale", "1" );//jic we were skipping
	Cvar_Set( "skippingCinematic", "0" );//jic we were skipping
}

//.........这里部分代码省略.........
			{
				CL_AddReliableCommand( "wwwdl bbl8r" );
				cls.bWWWDlDisconnected = qtrue;
			}

			return;
		}
		else
		{
			// server keeps sending that message till we ack it, eat and ignore
			//MSG_ReadLong( msg );
			MSG_ReadString( msg );
			MSG_ReadLong( msg );
			MSG_ReadLong( msg );
			return;
		}
	}

	if ( !block )
	{
		// block zero is special, contains file size
		clc.downloadSize = MSG_ReadLong( msg );

		Cvar_SetValue( "cl_downloadSize", clc.downloadSize );

		if ( clc.downloadSize < 0 )
		{
			Com_Error( ERR_DROP, "%s", MSG_ReadString( msg ) );
		}
	}

	size = MSG_ReadShort( msg );

	if ( size < 0 || size > sizeof( data ) )
	{
		Com_Error( ERR_DROP, "CL_ParseDownload: Invalid size %d for download chunk.", size );
	}

	MSG_ReadData( msg, data, size );

	if ( clc.downloadBlock != block )
	{
		Com_DPrintf( "CL_ParseDownload: Expected block %d, got %d\n", clc.downloadBlock, block );
		return;
	}

	// open the file if not opened yet
	if ( !clc.download )
	{
		clc.download = FS_SV_FOpenFileWrite( cls.downloadTempName );

		if ( !clc.download )
		{
			Com_Printf(_( "Could not create %s\n"), cls.downloadTempName );
			CL_AddReliableCommand( "stopdl" );
			CL_NextDownload();
			return;
		}
	}

	if ( size )
	{
		FS_Write( data, size, clc.download );
	}

	CL_AddReliableCommand( va( "nextdl %d", clc.downloadBlock ) );
	clc.downloadBlock++;

	clc.downloadCount += size;

	// So UI gets access to it
	Cvar_SetValue( "cl_downloadCount", clc.downloadCount );

	if ( !size )
	{
		// A zero length block means EOF
		if ( clc.download )
		{
			FS_FCloseFile( clc.download );
			clc.download = 0;

			// rename the file
			FS_SV_Rename( cls.downloadTempName, cls.downloadName );
		}

		*cls.downloadTempName = *cls.downloadName = 0;
		Cvar_Set( "cl_downloadName", "" );

		// send intentions now
		// We need this because without it, we would hold the last nextdl and then start
		// loading right away.  If we take a while to load, the server is happily trying
		// to send us that last block over and over.
		// Write it twice to help make sure we acknowledge the download
		CL_WritePacket();
		CL_WritePacket();

		// get another file if needed
		CL_NextDownload();
	}
}

void CL_cURL_BeginDownload( const char *localName, const char *remoteURL )
{
    clc.cURLUsed = qtrue;
    Com_Printf("URL: %s\n", remoteURL);
    Com_DPrintf("***** CL_cURL_BeginDownload *****\n"
                "Localname: %s\n"
                "RemoteURL: %s\n"
                "****************************\n", localName, remoteURL);
    CL_cURL_Cleanup();
    Q_strncpyz(clc.downloadURL, remoteURL, sizeof(clc.downloadURL));
    Q_strncpyz(clc.downloadName, localName, sizeof(clc.downloadName));
    Com_sprintf(clc.downloadTempName, sizeof(clc.downloadTempName),
                "%s.tmp", localName);

    // Set so UI gets access to it
    Cvar_Set("cl_downloadName", localName);
    Cvar_Set("cl_downloadSize", "0");
    Cvar_Set("cl_downloadCount", "0");
    Cvar_SetValue("cl_downloadTime", cls.realtime);

    clc.downloadBlock = 0; // Starting new file
    clc.downloadCount = 0;

    clc.downloadCURL = qcurl_easy_init();
    if(!clc.downloadCURL) {
        Com_Error(ERR_DROP, "CL_cURL_BeginDownload: qcurl_easy_init() "
                  "failed\n");
        return;
    }
    clc.download = FS_SV_FOpenFileWrite(clc.downloadTempName);
    if(!clc.download) {
        Com_Error(ERR_DROP, "CL_cURL_BeginDownload: failed to open "
                  "%s for writing\n", clc.downloadTempName);
        return;
    }
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_WRITEDATA, clc.download);
    if(com_developer->integer)
        qcurl_easy_setopt(clc.downloadCURL, CURLOPT_VERBOSE, 1);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_URL, clc.downloadURL);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_TRANSFERTEXT, 0);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_REFERER, va("ioQ3://%s",
                      NET_AdrToString(clc.serverAddress)));
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_USERAGENT, va("%s %s",
                      Q3_VERSION, qcurl_version()));
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_WRITEFUNCTION,
                      CL_cURL_CallbackWrite);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_WRITEDATA, &clc.download);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_NOPROGRESS, 0);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_PROGRESSFUNCTION,
                      CL_cURL_CallbackProgress);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_PROGRESSDATA, NULL);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_FAILONERROR, 1);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_FOLLOWLOCATION, 1);
    qcurl_easy_setopt(clc.downloadCURL, CURLOPT_MAXREDIRS, 5);
    clc.downloadCURLM = qcurl_multi_init();
    if(!clc.downloadCURLM) {
        qcurl_easy_cleanup(clc.downloadCURL);
        clc.downloadCURL = NULL;
        Com_Error(ERR_DROP, "CL_cURL_BeginDownload: qcurl_multi_init() "
                  "failed\n");
        return;
    }
    qcurl_multi_add_handle(clc.downloadCURLM, clc.downloadCURL);

    if(!(clc.sv_allowDownload & DLF_NO_DISCONNECT) &&
            !clc.cURLDisconnected) {

        CL_AddReliableCommand("disconnect");
        CL_WritePacket();
        CL_WritePacket();
        CL_WritePacket();
        clc.cURLDisconnected = qtrue;
    }
}

/*
=====================
CL_ParseDownload

A download message has been received from the server
=====================
*/
void CL_ParseDownload ( msg_t *msg ) {
	int		size;
	unsigned char data[MAX_MSGLEN];
	uint16_t block;

	if (!*clc.downloadTempName) {
		Com_Printf("Server sending download, but no download was requested\n");
		CL_AddReliableCommand("stopdl", qfalse);
		return;
	}

	// read the data
	block = MSG_ReadShort ( msg );

	if(!block && !clc.downloadBlock)
	{
		// block zero is special, contains file size
		clc.downloadSize = MSG_ReadLong ( msg );

		Cvar_SetValue( "cl_downloadSize", clc.downloadSize );

		if (clc.downloadSize < 0)
		{
			Com_Error( ERR_DROP, "%s", MSG_ReadString( msg ) );
			return;
		}
	}

	size = MSG_ReadShort ( msg );
	if (size < 0 || size > sizeof(data))
	{
		Com_Error(ERR_DROP, "CL_ParseDownload: Invalid size %d for download chunk", size);
		return;
	}
	
	MSG_ReadData(msg, data, size);

	if((clc.downloadBlock & 0xFFFF) != block)
	{
		Com_DPrintf( "CL_ParseDownload: Expected block %d, got %d\n", (clc.downloadBlock & 0xFFFF), block);
		return;
	}

	// open the file if not opened yet
	if (!clc.download)
	{
		clc.download = FS_SV_FOpenFileWrite( clc.downloadTempName );

		if (!clc.download) {
			Com_Printf( "Could not create %s\n", clc.downloadTempName );
			CL_AddReliableCommand("stopdl", qfalse);
			CL_NextDownload();
			return;
		}
	}

	if (size)
		FS_Write( data, size, clc.download );

	CL_AddReliableCommand(va("nextdl %d", clc.downloadBlock), qfalse);
	clc.downloadBlock++;

	clc.downloadCount += size;

	// So UI gets access to it
	Cvar_SetValue( "cl_downloadCount", clc.downloadCount );

	if (!size) { // A zero length block means EOF
		if (clc.download) {
			FS_FCloseFile( clc.download );
			clc.download = 0;

			// rename the file
			FS_SV_Rename ( clc.downloadTempName, clc.downloadName, qfalse );
		}

		// send intentions now
		// We need this because without it, we would hold the last nextdl and then start
		// loading right away.  If we take a while to load, the server is happily trying
		// to send us that last block over and over.
		// Write it twice to help make sure we acknowledge the download
		CL_WritePacket();
		CL_WritePacket();

		// get another file if needed
		CL_NextDownload ();
	}
}