C++ NET_SendPacket函数代码示例

/*
=====================
CL_Rcon_f

  Send the rest of the command line over as
  an unconnected command.
=====================
*/
void CL_Rcon_f (void)
{
    char	message[1024];
    int		i;
    netadr_t	to;

    if (!rcon_client_password->string)
    {
        Com_Printf ("You must set 'rcon_password' before\n"
                    "issuing an rcon command.\n");
        return;
    }

    message[0] = (char)255;
    message[1] = (char)255;
    message[2] = (char)255;
    message[3] = (char)255;
    message[4] = 0;

    NET_Config (true);		// allow remote

    strcat (message, "rcon ");

    strcat (message, rcon_client_password->string);
    strcat (message, " ");

    for (i=1 ; i<Cmd_Argc() ; i++)
    {
        strcat (message, Cmd_Argv(i));
        strcat (message, " ");
    }

    if (cls.state >= ca_connected)
        to = cls.netchan.remote_address;
    else
    {
        if (!strlen(rcon_address->string))
        {
            Com_Printf ("You must either be connected,\n"
                        "or set the 'rcon_address' cvar\n"
                        "to issue rcon commands\n");

            return;
        }
        NET_StringToAdr (rcon_address->string, &to);
        if (to.port == 0)
            to.port = BigShort (PORT_SERVER);
    }

    NET_SendPacket (NS_CLIENT, strlen(message)+1, message, to);
}

/*
================
CL_Connect_f

MAUTH version -- kick off an authentication sequence as first part of
connection routine.
================
*/
void CL_Connect_f (void)
{
	char	*server;
	char	*masterserver;
    char    data[2048];

	if (Cmd_Argc() != 3)
	{
		Com_Printf ("usage: connect <master> <server>\n");
		return;
	}
	
	Host_EndGame ();
	
    server = Cmd_Argv (1);
	strlcpy (cls.servername, server, sizeof(cls.servername));

    // Have to check for valid server address here as we must send to master...
	if (!NET_StringToAdr (cls.servername, &cls.server_adr))
	{
		Com_Printf ("Bad server address\n");
		return;
	}
	if (cls.server_adr.port == 0)
		cls.server_adr.port = BigShort (PORT_SERVER);

	masterserver = Cmd_Argv (2);
	strlcpy (cls.masterservername, masterserver, sizeof(cls.masterservername));

    // Start off auth sequence before trying to connect...
	if (!NET_StringToAdr (cls.masterservername, &cls.masterserver_adr))
	{
		Com_Printf ("Bad master server address\n");
		return;
	}
	if (cls.masterserver_adr.port == 0)
		cls.masterserver_adr.port = BigShort (27000);  // master port

	Com_Printf ("Attempting to auth with %s...\n", cls.masterservername);
	sprintf (data, "%c\n%s\n%s:%d\n",
            C2M_AUTH_INIT,
            Cvar_String("name"),
            cls.servername,
            cls.server_adr.port);
	NET_SendPacket (NS_CLIENT, strlen(data), data, cls.masterserver_adr);

    // Normal connection procedure...
    // FIXME wait?
    // FIXME use some qbools to work out if we get a NACK to stop trying to connect -- ie preserve state
	CL_BeginServerConnect();
}

/*
===============
Netchan_Transmit

Sends a message to a connection, fragmenting if necessary
A 0 length will still generate a packet.
================
*/
void Netchan_Transmit( netchan_t *chan, int length, const byte *data )
{
	msg_t send;
	byte  send_buf[ MAX_PACKETLEN ];

	if ( length > MAX_MSGLEN )
	{
		Com_Error( ERR_DROP, "Netchan_Transmit: length = %i", length );
	}

	chan->unsentFragmentStart = 0;

	// fragment large reliable messages
	if ( length >= FRAGMENT_SIZE )
	{
		chan->unsentFragments = qtrue;
		chan->unsentLength = length;
		Com_Memcpy( chan->unsentBuffer, data, length );

		// only send the first fragment now
		Netchan_TransmitNextFragment( chan );

		return;
	}

	// write the packet header
	MSG_InitOOB( &send, send_buf, sizeof( send_buf ) );

	MSG_WriteLong( &send, chan->outgoingSequence );
	chan->outgoingSequence++;

	// send the qport if we are a client
	if ( chan->sock == NS_CLIENT )
	{
		MSG_WriteShort( &send, qport->integer );
	}

	MSG_WriteData( &send, data, length );

	// send the datagram
	NET_SendPacket( chan->sock, send.cursize, send.data, chan->remoteAddress );

	if ( showpackets->integer )
	{
		Com_Printf( "%s send %4i : s=%i ack=%i\n"
		            , netsrcString[ chan->sock ]
		            , send.cursize
		            , chan->outgoingSequence - 1
		            , chan->incomingSequence );
	}
}

static void CL_SendConnectPacket_QW(peer_t *p) 
{
	char data[2048];
	char biguserinfo[MAX_INFO_STRING + 32];

	if (p->ps != ps_challenge)
		return;

	// Let the server know what extensions we support.
	strlcpy (biguserinfo, p->userinfo, sizeof (biguserinfo));
	snprintf(data, sizeof(data), "\xff\xff\xff\xff" "connect %i %i %i \"%s\"\n", QW_PROTOCOL_VERSION, p->qport, p->challenge, biguserinfo);

	NET_SendPacket(net_from_socket, strlen(data), data, &net_from);
}

/*
===============
NET_OutOfBandPrint

Sends a text message in an out-of-band datagram
================
*/
void QDECL PRINTF_LIKE(3) NET_OutOfBandPrint( netsrc_t sock, netadr_t adr, const char *format, ... )
{
	va_list argptr;
	char    string[ MAX_MSGLEN ];

	NET_SetOOBHeader( string );

	va_start( argptr, format );
	Q_vsnprintf( string + 4, sizeof( string ) - 4, format, argptr );
	va_end( argptr );

	// send the datagram
	NET_SendPacket( sock, strlen( string ), string, adr );
}

void NET_SV_SendQueryResponse(net_addr_t *addr)
{
    net_packet_t *reply;
    net_querydata_t querydata;
    int p;

    // Version

    querydata.version = PACKAGE_STRING;

    // Server state

    querydata.server_state = server_state;

    // Number of players/maximum players

    querydata.num_players = NET_SV_NumPlayers();
    querydata.max_players = NET_SV_MaxPlayers();

    // Game mode/mission

    querydata.gamemode = sv_gamemode;
    querydata.gamemission = sv_gamemission;

    //!
    // @category net
    // @arg <name>
    //
    // When starting a network server, specify a name for the server.
    //

    p = M_CheckParmWithArgs("-servername", 1);

    if (p > 0)
    {
        querydata.description = myargv[p + 1];
    }
    else
    {
        querydata.description = "Unnamed server";
    }

    // Send it and we're done.
    NET_Log("server: sending query response to %s", NET_AddrToString(addr));
    reply = NET_NewPacket(64);
    NET_WriteInt16(reply, NET_PACKET_TYPE_QUERY_RESPONSE);
    NET_WriteQueryData(reply, &querydata);
    NET_SendPacket(addr, reply);
    NET_FreePacket(reply);
}

/*
===============
Netchan_OutOfBand

Sends an out-of-band datagram
================
*/
void Netchan_OutOfBand (int net_socket, netadr_t adr, int length, byte *data)
{
	sizebuf_t	send;
	byte		send_buf[MAX_MSGLEN];

// write the packet header
	SZ_Init (&send, send_buf, sizeof(send_buf));
	
	MSG_WriteLong (&send, -1);	// -1 sequence means out of band
	SZ_Write (&send, data, length);

// send the datagram
	NET_SendPacket (net_socket, send.cursize, send.data, adr);
}

void Host_GetBatchModList_f() { //Odd...

   master_server_t * ptr;


   NET_Config(1);
   if(gfNoMasterServer != 0 || masterlist == NULL) { return; }

   for(ptr = masterlist; ptr != NULL; ptr = ptr->next) {

      Con_Printf("Requesting batch mod status from %s", NET_AdrToString(ptr->address));
      NET_SendPacket(NS_CLIENT, sizeof("x\r\nstart-of-list\r\n"), "x\r\nstart-of-list\r\n", ptr->address);
   }
}

/*
	CL_SendConnectPacket

	called by CL_Connect_f and CL_CheckResend
*/
void
CL_SendConnectPacket (void)
{
	netadr_t    adr;
	char        data[2048];
	double      t1, t2;

// JACK: Fixed bug where DNS lookups would cause two connects real fast
//       Now, adds lookup time to the connect time.
//       Should I add it to realtime instead?!?!

	if (cls.state != ca_disconnected)
		return;

	t1 = Sys_DoubleTime ();

	if (!NET_StringToAdr (cls.servername, &adr)) {
		Con_Printf ("Bad server address\n");
		connect_time = -1;
		return;
	}

	if (!NET_IsClientLegal (&adr)) {
		Con_Printf ("Illegal server address\n");
		connect_time = -1;
		return;
	}

	if (adr.port == 0)
		adr.port = BigShort (27500);
	t2 = Sys_DoubleTime ();

	connect_time = realtime + t2 - t1;	// for retransmit requests

	cls.qport = Cvar_VariableValue ("qport");

	// Arrgh, this was not in the old binary only release, and eats up
	// far too much of the 196 chars in the userinfo space, leaving nothing
	// for player use, thus, its commented out for the moment..
	// 
	// Info_SetValueForStarKey (cls.userinfo, "*ip", NET_AdrToString(adr),
	// MAX_INFO_STRING);

//  Con_Printf ("Connecting to %s...\n", cls.servername);
	snprintf (data, sizeof (data), "%c%c%c%cconnect %i %i %i \"%s\"\n",
			  255, 255, 255, 255, PROTOCOL_VERSION, cls.qport, cls.challenge,
			  cls.userinfo);
	NET_SendPacket (strlen (data), data, adr);
}

/*
=================
Netchan_TransmitNextFragment

Send one fragment of the current message
=================
*/
qboolean Netchan_TransmitNextFragment( netchan_t *chan ) {
	msg_t send;
	qboolean sendsucc;
	byte send_buf[MAX_PACKETLEN];
	int fragmentLength;
	qboolean var_01 = qfalse;
	// write the packet header
	MSG_Init( &send, send_buf, sizeof( send_buf ) );                // <-- only do the oob here

	MSG_WriteLong( &send, chan->outgoingSequence | FRAGMENT_BIT );

	// send the qport if we are a client
	if ( chan->sock == NS_CLIENT ) {
		MSG_WriteShort( &send, qport->integer );
	}

	// copy the reliable message to the packet first
	fragmentLength = FRAGMENT_SIZE;
	if ( chan->unsentFragmentStart  + fragmentLength > chan->unsentLength ) {
		fragmentLength = chan->unsentLength - chan->unsentFragmentStart;
		var_01 = qtrue;
	}

	MSG_WriteLong(&send, chan->unsentFragmentStart);
	MSG_WriteShort( &send, fragmentLength );
	MSG_WriteData( &send, chan->unsentBuffer + chan->unsentFragmentStart, fragmentLength );

	// send the datagram
	sendsucc = NET_SendPacket( chan->sock, send.cursize, send.data, &chan->remoteAddress );
	if ( showpackets->boolean ) {
		Com_Printf( "%s send %4i : s=%i fragment=%i,%i\n"
					, netsrcString[ chan->sock ]
					, send.cursize
					, chan->outgoingSequence
					, chan->unsentFragmentStart, fragmentLength );
	}

	chan->unsentFragmentStart += fragmentLength;

	// this exit condition is a little tricky, because a packet
	// that is exactly the fragment length still needs to send
	// a second packet of zero length so that the other side
	// can tell there aren't more to follow
	if ( chan->unsentFragmentStart == chan->unsentLength && var_01 ) {
		chan->outgoingSequence++;
		chan->unsentFragments = qfalse;
	}
	return sendsucc;
}

/*
=================
SV_ConnectionlessPacket

A connectionless packet has four leading 0xff
characters to distinguish it from a game channel.
Clients that are in the game can still send
connectionless packets.
=================
*/
static void SV_ConnectionlessPacket (void)
{
	const char	*s;
	const char	*c;

	MSG_BeginReading ();
	MSG_ReadLong ();	// skip the -1 marker

	s = MSG_ReadStringLine ();

	Cmd_TokenizeString (s);

	c = Cmd_Argv(0);

	if (!strcmp(c, "ping") || ( c[0] == A2A_PING && (c[1] == 0 || c[1] == '\n')) )
	{
		SVC_Ping ();
		return;
	}
	if (c[0] == A2A_ACK && (c[1] == 0 || c[1] == '\n') )
	{
		Con_Printf ("A2A_ACK from %s\n", NET_AdrToString (net_from));
		return;
	}
	else if (c[0] == A2S_ECHO)
	{
		NET_SendPacket (net_message.cursize, net_message.data, net_from);
		return;
	}
	else if (!strcmp(c,"status"))
	{
		SVC_Status ();
		return;
	}
	else if (!strcmp(c,"log"))
	{
		SVC_Log ();
		return;
	}
	else if (!strcmp(c,"connect"))
	{
		SVC_DirectConnect ();
		return;
	}
	else if (!strcmp(c, "rcon"))
		SVC_RemoteCommand ();
	else
		Con_Printf ("bad connectionless packet from %s:\n%s\n", NET_AdrToString (net_from), s);
}

/*
=================
CL_InternetServers_f
=================
*/
void CL_InternetServers_f( void )
{
	netadr_t	adr;
	char	fullquery[512] = "\x31\xFF" "0.0.0.0:0\0" "\\gamedir\\";

	MsgDev( D_INFO, "Scanning for servers on the internet area...\n" );
	NET_Config( true ); // allow remote

	if( !NET_StringToAdr( MASTERSERVER_ADR, &adr ) )
		MsgDev( D_INFO, "Can't resolve adr: %s\n", MASTERSERVER_ADR );

	Q_strcpy( &fullquery[21], GI->gamedir );

	NET_SendPacket( NS_CLIENT, Q_strlen( GI->gamedir ) + 22, fullquery, adr );
}

/*
================
SVC_Log

Responds with all the logged frags for ranking programs.
If a sequence number is passed as a parameter and it is
the same as the current sequence, an A2A_NACK will be returned
instead of the data.
================
*/
void SVC_Log (void)
{
	int		seq;
	char	data[MAX_DATAGRAM+64];

	if (Cmd_Argc() == 2)
		seq = atoi(Cmd_Argv(1));
	else
		seq = -1;

	if (seq == svs.logsequence-1 || !sv_fraglogfile)
	{	// they already have this data, or we aren't logging frags
		data[0] = A2A_NACK;
		NET_SendPacket (NS_SERVER, 1, data, net_from);
		return;
	}

	Com_DPrintf ("sending log %i to %s\n", svs.logsequence-1, NET_AdrToString(net_from));

	sprintf (data, "stdlog %i\n", svs.logsequence-1);
	strcat (data, (char *)svs.log_buf[((svs.logsequence-1)&1)]);

	NET_SendPacket (NS_SERVER, strlen(data)+1, data, net_from);
}

/*
* Netchan_OutOfBand
* 
* Sends an out-of-band datagram
*/
void Netchan_OutOfBand( const socket_t *socket, const netadr_t *address, size_t length, const uint8_t *data )
{
	msg_t send;
	uint8_t send_buf[MAX_PACKETLEN];

	// write the packet header
	MSG_Init( &send, send_buf, sizeof( send_buf ) );

	MSG_WriteLong( &send, -1 ); // -1 sequence means out of band
	MSG_WriteData( &send, data, length );

	// send the datagram
	if( !NET_SendPacket( socket, send.data, send.cursize, address ) )
		Com_Printf( "NET_SendPacket: Error: %s\n", NET_ErrorString() );
}

/*
=====================
CL_Rcon_f

  Send the rest of the command line over as
  an unconnected command.
=====================
*/
void CL_Rcon_f (void)
{
	char	message[1024];
	int		i;
	netadr_t	to;

	if (!rcon_password.string)
	{
		Con_Printf ("You must set 'rcon_password' before\n"
					"issuing an rcon command.\n");
		return;
	}

	message[0] = 255;
	message[1] = 255;
	message[2] = 255;
	message[3] = 255;
	message[4] = 0;

	strcat (message, "rcon ");

	strcat (message, rcon_password.string);
	strcat (message, " ");

	for (i=1 ; i<Cmd_Argc() ; i++)
	{
		strcat (message, Cmd_Argv(i));
		strcat (message, " ");
	}

	if (cls.state >= ca_connected)
		to = cls.netchan.remote_address;
	else
	{
		if (!strlen(rcon_address.string))
		{
			Con_Printf ("You must either be connected,\n"
						"or set the 'rcon_address' cvar\n"
						"to issue rcon commands\n");

			return;
		}
		NET_StringToAdr (rcon_address.string, &to);
	}
	
	NET_SendPacket (strlen(message)+1, message
		, to);
}