Quake-2

sv_send.c (12612B)

---

 /*
 Copyright (C) 1997-2001 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.
 
 */
 // sv_main.c -- server main program
 
 #include "server.h"
 
 /*
 =============================================================================
 
 Com_Printf redirection
 
 =============================================================================
 */
 
 char sv_outputbuf[SV_OUTPUTBUF_LENGTH];
 
 void SV_FlushRedirect (int sv_redirected, char *outputbuf)
 {
 	if (sv_redirected == RD_PACKET)
 	{
 		Netchan_OutOfBandPrint (NS_SERVER, net_from, "print\n%s", outputbuf);
 	}
 	else if (sv_redirected == RD_CLIENT)
 	{
 		MSG_WriteByte (&sv_client->netchan.message, svc_print);
 		MSG_WriteByte (&sv_client->netchan.message, PRINT_HIGH);
 		MSG_WriteString (&sv_client->netchan.message, outputbuf);
 	}
 }
 
 
 /*
 =============================================================================
 
 EVENT MESSAGES
 
 =============================================================================
 */
 
 
 /*
 =================
 SV_ClientPrintf
 
 Sends text across to be displayed if the level passes
 =================
 */
 void SV_ClientPrintf (client_t *cl, int level, char *fmt, ...)
 {
 	va_list		argptr;
 	char		string[1024];
 	
 	if (level < cl->messagelevel)
 		return;
 	
 	va_start (argptr,fmt);
 	vsprintf (string, fmt,argptr);
 	va_end (argptr);
 	
 	MSG_WriteByte (&cl->netchan.message, svc_print);
 	MSG_WriteByte (&cl->netchan.message, level);
 	MSG_WriteString (&cl->netchan.message, string);
 }
 
 /*
 =================
 SV_BroadcastPrintf
 
 Sends text to all active clients
 =================
 */
 void SV_BroadcastPrintf (int level, char *fmt, ...)
 {
 	va_list		argptr;
 	char		string[2048];
 	client_t	*cl;
 	int			i;
 
 	va_start (argptr,fmt);
 	vsprintf (string, fmt,argptr);
 	va_end (argptr);
 	
 	// echo to console
 	if (dedicated->value)
 	{
 		char	copy[1024];
 		int		i;
 		
 		// mask off high bits
 		for (i=0 ; i<1023 && string[i] ; i++)
 			copy[i] = string[i]&127;
 		copy[i] = 0;
 		Com_Printf ("%s", copy);
 	}
 
 	for (i=0, cl = svs.clients ; i<maxclients->value; i++, cl++)
 	{
 		if (level < cl->messagelevel)
 			continue;
 		if (cl->state != cs_spawned)
 			continue;
 		MSG_WriteByte (&cl->netchan.message, svc_print);
 		MSG_WriteByte (&cl->netchan.message, level);
 		MSG_WriteString (&cl->netchan.message, string);
 	}
 }
 
 /*
 =================
 SV_BroadcastCommand
 
 Sends text to all active clients
 =================
 */
 void SV_BroadcastCommand (char *fmt, ...)
 {
 	va_list		argptr;
 	char		string[1024];
 	
 	if (!sv.state)
 		return;
 	va_start (argptr,fmt);
 	vsprintf (string, fmt,argptr);
 	va_end (argptr);
 
 	MSG_WriteByte (&sv.multicast, svc_stufftext);
 	MSG_WriteString (&sv.multicast, string);
 	SV_Multicast (NULL, MULTICAST_ALL_R);
 }
 
 
 /*
 =================
 SV_Multicast
 
 Sends the contents of sv.multicast to a subset of the clients,
 then clears sv.multicast.
 
 MULTICAST_ALL	same as broadcast (origin can be NULL)
 MULTICAST_PVS	send to clients potentially visible from org
 MULTICAST_PHS	send to clients potentially hearable from org
 =================
 */
 void SV_Multicast (vec3_t origin, multicast_t to)
 {
 	client_t	*client;
 	byte		*mask;
 	int			leafnum, cluster;
 	int			j;
 	qboolean	reliable;
 	int			area1, area2;
 
 	reliable = false;
 
 	if (to != MULTICAST_ALL_R && to != MULTICAST_ALL)
 	{
 		leafnum = CM_PointLeafnum (origin);
 		area1 = CM_LeafArea (leafnum);
 	}
 	else
 	{
 		leafnum = 0;	// just to avoid compiler warnings
 		area1 = 0;
 	}
 
 	// if doing a serverrecord, store everything
 	if (svs.demofile)
 		SZ_Write (&svs.demo_multicast, sv.multicast.data, sv.multicast.cursize);
 	
 	switch (to)
 	{
 	case MULTICAST_ALL_R:
 		reliable = true;	// intentional fallthrough
 	case MULTICAST_ALL:
 		leafnum = 0;
 		mask = NULL;
 		break;
 
 	case MULTICAST_PHS_R:
 		reliable = true;	// intentional fallthrough
 	case MULTICAST_PHS:
 		leafnum = CM_PointLeafnum (origin);
 		cluster = CM_LeafCluster (leafnum);
 		mask = CM_ClusterPHS (cluster);
 		break;
 
 	case MULTICAST_PVS_R:
 		reliable = true;	// intentional fallthrough
 	case MULTICAST_PVS:
 		leafnum = CM_PointLeafnum (origin);
 		cluster = CM_LeafCluster (leafnum);
 		mask = CM_ClusterPVS (cluster);
 		break;
 
 	default:
 		mask = NULL;
 		Com_Error (ERR_FATAL, "SV_Multicast: bad to:%i", to);
 	}
 
 	// send the data to all relevent clients
 	for (j = 0, client = svs.clients; j < maxclients->value; j++, client++)
 	{
 		if (client->state == cs_free || client->state == cs_zombie)
 			continue;
 		if (client->state != cs_spawned && !reliable)
 			continue;
 
 		if (mask)
 		{
 			leafnum = CM_PointLeafnum (client->edict->s.origin);
 			cluster = CM_LeafCluster (leafnum);
 			area2 = CM_LeafArea (leafnum);
 			if (!CM_AreasConnected (area1, area2))
 				continue;
 			if ( mask && (!(mask[cluster>>3] & (1<<(cluster&7)) ) ) )
 				continue;
 		}
 
 		if (reliable)
 			SZ_Write (&client->netchan.message, sv.multicast.data, sv.multicast.cursize);
 		else
 			SZ_Write (&client->datagram, sv.multicast.data, sv.multicast.cursize);
 	}
 
 	SZ_Clear (&sv.multicast);
 }
 
 
 /*  
 ==================
 SV_StartSound
 
 Each entity can have eight independant sound sources, like voice,
 weapon, feet, etc.
 
 If cahnnel & 8, the sound will be sent to everyone, not just
 things in the PHS.
 
 FIXME: if entity isn't in PHS, they must be forced to be sent or
 have the origin explicitly sent.
 
 Channel 0 is an auto-allocate channel, the others override anything
 already running on that entity/channel pair.
 
 An attenuation of 0 will play full volume everywhere in the level.
 Larger attenuations will drop off.  (max 4 attenuation)
 
 Timeofs can range from 0.0 to 0.1 to cause sounds to be started
 later in the frame than they normally would.
 
 If origin is NULL, the origin is determined from the entity origin
 or the midpoint of the entity box for bmodels.
 ==================
 */  
 void SV_StartSound (vec3_t origin, edict_t *entity, int channel,
 					int soundindex, float volume,
 					float attenuation, float timeofs)
 {       
 	int			sendchan;
     int			flags;
     int			i;
 	int			ent;
 	vec3_t		origin_v;
 	qboolean	use_phs;
 
 	if (volume < 0 || volume > 1.0)
 		Com_Error (ERR_FATAL, "SV_StartSound: volume = %f", volume);
 
 	if (attenuation < 0 || attenuation > 4)
 		Com_Error (ERR_FATAL, "SV_StartSound: attenuation = %f", attenuation);
 
 //	if (channel < 0 || channel > 15)
 //		Com_Error (ERR_FATAL, "SV_StartSound: channel = %i", channel);
 
 	if (timeofs < 0 || timeofs > 0.255)
 		Com_Error (ERR_FATAL, "SV_StartSound: timeofs = %f", timeofs);
 
 	ent = NUM_FOR_EDICT(entity);
 
 	if (channel & 8)	// no PHS flag
 	{
 		use_phs = false;
 		channel &= 7;
 	}
 	else
 		use_phs = true;
 
 	sendchan = (ent<<3) | (channel&7);
 
 	flags = 0;
 	if (volume != DEFAULT_SOUND_PACKET_VOLUME)
 		flags |= SND_VOLUME;
 	if (attenuation != DEFAULT_SOUND_PACKET_ATTENUATION)
 		flags |= SND_ATTENUATION;
 
 	// the client doesn't know that bmodels have weird origins
 	// the origin can also be explicitly set
 	if ( (entity->svflags & SVF_NOCLIENT)
 		|| (entity->solid == SOLID_BSP) 
 		|| origin )
 		flags |= SND_POS;
 
 	// always send the entity number for channel overrides
 	flags |= SND_ENT;
 
 	if (timeofs)
 		flags |= SND_OFFSET;
 
 	// use the entity origin unless it is a bmodel or explicitly specified
 	if (!origin)
 	{
 		origin = origin_v;
 		if (entity->solid == SOLID_BSP)
 		{
 			for (i=0 ; i<3 ; i++)
 				origin_v[i] = entity->s.origin[i]+0.5*(entity->mins[i]+entity->maxs[i]);
 		}
 		else
 		{
 			VectorCopy (entity->s.origin, origin_v);
 		}
 	}
 
 	MSG_WriteByte (&sv.multicast, svc_sound);
 	MSG_WriteByte (&sv.multicast, flags);
 	MSG_WriteByte (&sv.multicast, soundindex);
 
 	if (flags & SND_VOLUME)
 		MSG_WriteByte (&sv.multicast, volume*255);
 	if (flags & SND_ATTENUATION)
 		MSG_WriteByte (&sv.multicast, attenuation*64);
 	if (flags & SND_OFFSET)
 		MSG_WriteByte (&sv.multicast, timeofs*1000);
 
 	if (flags & SND_ENT)
 		MSG_WriteShort (&sv.multicast, sendchan);
 
 	if (flags & SND_POS)
 		MSG_WritePos (&sv.multicast, origin);
 
 	// if the sound doesn't attenuate,send it to everyone
 	// (global radio chatter, voiceovers, etc)
 	if (attenuation == ATTN_NONE)
 		use_phs = false;
 
 	if (channel & CHAN_RELIABLE)
 	{
 		if (use_phs)
 			SV_Multicast (origin, MULTICAST_PHS_R);
 		else
 			SV_Multicast (origin, MULTICAST_ALL_R);
 	}
 	else
 	{
 		if (use_phs)
 			SV_Multicast (origin, MULTICAST_PHS);
 		else
 			SV_Multicast (origin, MULTICAST_ALL);
 	}
 }           
 
 
 /*
 ===============================================================================
 
 FRAME UPDATES
 
 ===============================================================================
 */
 
 
 
 /*
 =======================
 SV_SendClientDatagram
 =======================
 */
 qboolean SV_SendClientDatagram (client_t *client)
 {
 	byte		msg_buf[MAX_MSGLEN];
 	sizebuf_t	msg;
 
 	SV_BuildClientFrame (client);
 
 	SZ_Init (&msg, msg_buf, sizeof(msg_buf));
 	msg.allowoverflow = true;
 
 	// send over all the relevant entity_state_t
 	// and the player_state_t
 	SV_WriteFrameToClient (client, &msg);
 
 	// copy the accumulated multicast datagram
 	// for this client out to the message
 	// it is necessary for this to be after the WriteEntities
 	// so that entity references will be current
 	if (client->datagram.overflowed)
 		Com_Printf ("WARNING: datagram overflowed for %s\n", client->name);
 	else
 		SZ_Write (&msg, client->datagram.data, client->datagram.cursize);
 	SZ_Clear (&client->datagram);
 
 	if (msg.overflowed)
 	{	// must have room left for the packet header
 		Com_Printf ("WARNING: msg overflowed for %s\n", client->name);
 		SZ_Clear (&msg);
 	}
 
 	// send the datagram
 	Netchan_Transmit (&client->netchan, msg.cursize, msg.data);
 
 	// record the size for rate estimation
 	client->message_size[sv.framenum % RATE_MESSAGES] = msg.cursize;
 
 	return true;
 }
 
 
 /*
 ==================
 SV_DemoCompleted
 ==================
 */
 void SV_DemoCompleted (void)
 {
 	if (sv.demofile)
 	{
 		fclose (sv.demofile);
 		sv.demofile = NULL;
 	}
 	SV_Nextserver ();
 }
 
 
 /*
 =======================
 SV_RateDrop
 
 Returns true if the client is over its current
 bandwidth estimation and should not be sent another packet
 =======================
 */
 qboolean SV_RateDrop (client_t *c)
 {
 	int		total;
 	int		i;
 
 	// never drop over the loopback
 	if (c->netchan.remote_address.type == NA_LOOPBACK)
 		return false;
 
 	total = 0;
 
 	for (i = 0 ; i < RATE_MESSAGES ; i++)
 	{
 		total += c->message_size[i];
 	}
 
 	if (total > c->rate)
 	{
 		c->surpressCount++;
 		c->message_size[sv.framenum % RATE_MESSAGES] = 0;
 		return true;
 	}
 
 	return false;
 }
 
 /*
 =======================
 SV_SendClientMessages
 =======================
 */
 void SV_SendClientMessages (void)
 {
 	int			i;
 	client_t	*c;
 	int			msglen;
 	byte		msgbuf[MAX_MSGLEN];
 	int			r;
 
 	msglen = 0;
 
 	// read the next demo message if needed
 	if (sv.state == ss_demo && sv.demofile)
 	{
 		if (sv_paused->value)
 			msglen = 0;
 		else
 		{
 			// get the next message
 			r = fread (&msglen, 4, 1, sv.demofile);
 			if (r != 1)
 			{
 				SV_DemoCompleted ();
 				return;
 			}
 			msglen = LittleLong (msglen);
 			if (msglen == -1)
 			{
 				SV_DemoCompleted ();
 				return;
 			}
 			if (msglen > MAX_MSGLEN)
 				Com_Error (ERR_DROP, "SV_SendClientMessages: msglen > MAX_MSGLEN");
 			r = fread (msgbuf, msglen, 1, sv.demofile);
 			if (r != 1)
 			{
 				SV_DemoCompleted ();
 				return;
 			}
 		}
 	}
 
 	// send a message to each connected client
 	for (i=0, c = svs.clients ; i<maxclients->value; i++, c++)
 	{
 		if (!c->state)
 			continue;
 		// if the reliable message overflowed,
 		// drop the client
 		if (c->netchan.message.overflowed)
 		{
 			SZ_Clear (&c->netchan.message);
 			SZ_Clear (&c->datagram);
 			SV_BroadcastPrintf (PRINT_HIGH, "%s overflowed\n", c->name);
 			SV_DropClient (c);
 		}
 
 		if (sv.state == ss_cinematic 
 			|| sv.state == ss_demo 
 			|| sv.state == ss_pic
 			)
 			Netchan_Transmit (&c->netchan, msglen, msgbuf);
 		else if (c->state == cs_spawned)
 		{
 			// don't overrun bandwidth
 			if (SV_RateDrop (c))
 				continue;
 
 			SV_SendClientDatagram (c);
 		}
 		else
 		{
 	// just update reliable	if needed
 			if (c->netchan.message.cursize	|| curtime - c->netchan.last_sent > 1000 )
 				Netchan_Transmit (&c->netchan, 0, NULL);
 		}
 	}
 }