shithub: qk1

ref: e87abf9ce8f370d262cba430020d2c0a4c5b774e
dir: /net_loop.c/

#include "quakedef.h"

static bool localconnectpending;
static qsocket_t *loop_client;
static qsocket_t *loop_server;

int Loop_Init (void)
{
	if (cls.state == ca_dedicated)
		return -1;
	return 0;
}

void Loop_Shutdown (void)
{
}

qsocket_t *Loop_Connect (char *host)
{
	if(strcmp(host, "local") != 0)
		return nil;

	localconnectpending = true;

	if (!loop_client)
	{
		if ((loop_client = NET_NewQSocket ()) == nil)
		{
			Con_Printf("Loop_Connect: no qsocket available\n");
			return nil;
		}
		strcpy(loop_client->address, "localhost");
	}
	loop_client->receiveMessageLength = 0;
	loop_client->sendMessageLength = 0;
	loop_client->canSend = true;
	loop_client->local = true;

	if (!loop_server)
	{
		if ((loop_server = NET_NewQSocket ()) == nil)
		{
			Con_Printf("Loop_Connect: no qsocket available\n");
			return nil;
		}
		strcpy(loop_server->address, "LOCAL");
	}
	loop_server->receiveMessageLength = 0;
	loop_server->sendMessageLength = 0;
	loop_server->canSend = true;
	loop_server->local = true;

	loop_client->driverdata = (void *)loop_server;
	loop_server->driverdata = (void *)loop_client;

	return loop_client;
}


qsocket_t *Loop_CheckNewConnections (void)
{
	if (!localconnectpending)
		return nil;

	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)
		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)
		fatal("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
	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
	memcpy(buffer, data->data, data->cursize);
	*bufferLength = IntAlign(*bufferLength + data->cursize + 4);
	return 1;
}


bool Loop_CanSendMessage (qsocket_t *sock)
{
	if (!sock->driverdata)
		return false;
	return sock->canSend;
}


bool Loop_CanSendUnreliableMessage (qsocket_t *) /*sock*/
{
	return true;
}


void Loop_Close (qsocket_t *sock)
{
	if (sock->driverdata)
		((qsocket_t *)sock->driverdata)->driverdata = nil;
	sock->receiveMessageLength = 0;
	sock->sendMessageLength = 0;
	sock->canSend = true;
	if (sock == loop_client)
		loop_client = nil;
	else
		loop_server = nil;
}