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/*

Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

// net_loop.c

#include "quakedef.h"

#include "net_loop.h"

qboolean	localconnectpending = false;

qsocket_t	*loop_client = NULL;

qsocket_t	*loop_server = NULL;

int Loop_Init (void)

{

	if (cls.state == ca_dedicated)

		return -1;

	return 0;

}

void Loop_Shutdown (void)

{

}

void Loop_Listen (qboolean state)

{

}

void Loop_SearchForHosts (qboolean xmit)

{

	if (!sv.active)

		return;

	hostCacheCount = 1;

	if (Q_strcmp(hostname.string, "UNNAMED") == 0)

		Q_strcpy(hostcache[0].name, "local");

	else

		Q_strcpy(hostcache[0].name, hostname.string);

	Q_strcpy(hostcache[0].map, sv.name);

	hostcache[0].users = net_activeconnections;

	hostcache[0].maxusers = svs.maxclients;

	hostcache[0].driver = net_driverlevel;

	Q_strcpy(hostcache[0].cname, "local");

}

qsocket_t *Loop_Connect (char *host)

{

	if (Q_strcmp(host,"local") != 0)

		return NULL;

	localconnectpending = true;

	if (!loop_client)

	{

		if ((loop_client = NET_NewQSocket ()) == NULL)

		{

			Con_Printf("Loop_Connect: no qsocket available\n");

			return NULL;

		}

		Q_strcpy (loop_client->address, "localhost");

	}

	loop_client->receiveMessageLength = 0;

	loop_client->sendMessageLength = 0;

	loop_client->canSend = true;

	if (!loop_server)

	{

		if ((loop_server = NET_NewQSocket ()) == NULL)

		{

			Con_Printf("Loop_Connect: no qsocket available\n");

			return NULL;

		}

		Q_strcpy (loop_server->address, "LOCAL");

	}

	loop_server->receiveMessageLength = 0;

	loop_server->sendMessageLength = 0;

	loop_server->canSend = true;

	loop_client->driverdata = (void *)loop_server;

	loop_server->driverdata = (void *)loop_client;

	return loop_client;

}

qsocket_t *Loop_CheckNewConnections (void)

{

	if (!localconnectpending)

		return NULL;

	localconnectpending = false;

	loop_server->sendMessageLength = 0;

	loop_server->receiveMessageLength = 0;

	loop_server->canSend = true;

	loop_client->sendMessageLength = 0;

	loop_client->receiveMessageLength = 0;

	loop_client->canSend = true;

	return loop_server;

}

static int IntAlign(int value)

{

	return (value + (sizeof(int) - 1)) & (~(sizeof(int) - 1));

}

int Loop_GetMessage (qsocket_t *sock)

{

	int		ret;

	int		length;

	if (sock->receiveMessageLength == 0)

		return 0;

	ret = sock->receiveMessage[0];

	length = sock->receiveMessage[1] + (sock->receiveMessage[2] << 8);

	// alignment byte skipped here

	SZ_Clear (&net_message);

	SZ_Write (&net_message, &sock->receiveMessage[4], length);

	length = IntAlign(length + 4);

	sock->receiveMessageLength -= length;

	if (sock->receiveMessageLength)

		Q_memcpy(sock->receiveMessage, &sock->receiveMessage[length], sock->receiveMessageLength);

	if (sock->driverdata && ret == 1)

		((qsocket_t *)sock->driverdata)->canSend = true;

	return ret;

}

int Loop_SendMessage (qsocket_t *sock, sizebuf_t *data)

{

	byte *buffer;

	int  *bufferLength;

	if (!sock->driverdata)

		return -1;

	bufferLength = &((qsocket_t *)sock->driverdata)->receiveMessageLength;

	if ((*bufferLength + data->cursize + 4) > NET_MAXMESSAGE)

		Sys_Error("Loop_SendMessage: overflow\n");

	buffer = ((qsocket_t *)sock->driverdata)->receiveMessage + *bufferLength;

	// message type

	*buffer++ = 1;

	// length

	*buffer++ = data->cursize & 0xff;

	*buffer++ = data->cursize >> 8;

	// align

	buffer++;

	// message

	Q_memcpy(buffer, data->data, data->cursize);

	*bufferLength = IntAlign(*bufferLength + data->cursize + 4);

	sock->canSend = false;

	return 1;

}

int Loop_SendUnreliableMessage (qsocket_t *sock, sizebuf_t *data)

{

	byte *buffer;

	int  *bufferLength;

	if (!sock->driverdata)

		return -1;

	bufferLength = &((qsocket_t *)sock->driverdata)->receiveMessageLength;

	if ((*bufferLength + data->cursize + sizeof(byte) + sizeof(short)) > NET_MAXMESSAGE)

		return 0;

	buffer = ((qsocket_t *)sock->driverdata)->receiveMessage + *bufferLength;

	// message type

	*buffer++ = 2;

	// length

	*buffer++ = data->cursize & 0xff;

	*buffer++ = data->cursize >> 8;

	// align

	buffer++;

	// message

	Q_memcpy(buffer, data->data, data->cursize);

	*bufferLength = IntAlign(*bufferLength + data->cursize + 4);

	return 1;

}

qboolean Loop_CanSendMessage (qsocket_t *sock)

{

	if (!sock->driverdata)

		return false;

	return sock->canSend;

}

qboolean Loop_CanSendUnreliableMessage (qsocket_t *sock)

{

	return true;

}

void Loop_Close (qsocket_t *sock)

{

	if (sock->driverdata)

		((qsocket_t *)sock->driverdata)->driverdata = NULL;

	sock->receiveMessageLength = 0;

	sock->sendMessageLength = 0;

	sock->canSend = true;

	if (sock == loop_client)

		loop_client = NULL;

	else

		loop_server = NULL;

}