The Quake sources as originally release under the GPL license on December 21, 1999

WinQuake/net_loop.c

@@ -0,0 +1,245 @@
+/*
+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;
+}