fteqw/fteqtv/forward.c

/*
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 included (GNU.txt) 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.
*/

/*
This is the file responsible for handling incoming tcp connections.
This includes mvd recording.
Password checks and stuff are implemented here. This i server side stuff.

*/

#include "qtv.h"
#include "time.h"


#undef IN
#define IN(x) buffer[(x)&(MAX_PROXY_BUFFER-1)]

void CheckMVDConsistancy(unsigned char *buffer, int pos, int size)
{
/*
	int length;
	int msec, type;
	while(pos < size)
	{
		msec = IN(pos++);
		type = IN(pos++);
		if (type == dem_set)
		{
			pos+=8;
			continue;
		}
		if (type == dem_multiple)
			pos+=4;
		length = (IN(pos+0)<<0) + (IN(pos+1)<<8) + (IN(pos+2)<<16) + (IN(pos+3)<<24);
		pos+=4;
		if (length > MAX_MSGLEN)
			printf("too big (%i)\n", length);
		pos += length;
	}
	if (pos != size)
		printf("pos != size\n");
	*/
}





void SV_FindProxies(SOCKET sock, cluster_t *cluster, sv_t *defaultqtv)
{
	unsigned long nonblocking = true;
	oproxy_t *prox;

	if (sock == INVALID_SOCKET)
		return;
	sock = accept(sock, NULL, NULL);
	if (sock == INVALID_SOCKET)
		return;

	if (ioctlsocket (sock, FIONBIO, &nonblocking) == -1)
	{
		Sys_Printf(cluster, "failed to set client socket to nonblocking. dropping.\n");
		closesocket(sock);	//failed...
		return;
	}

	if (cluster->maxproxies >= 0 && cluster->numproxies >= cluster->maxproxies)
	{
		const char buffer[] = {dem_all, 1, 'P','r','o','x','y',' ','i','s',' ','f','u','l','l','.'};
		send(sock, buffer, strlen(buffer), 0);
		closesocket(sock);
		return;
	}

	prox = malloc(sizeof(*prox));
	if (!prox)
	{//out of mem?
		closesocket(sock);
		return;
	}
	memset(prox, 0, sizeof(*prox));
	prox->sock = sock;
	prox->file = NULL;

	cluster->numproxies++;

	prox->droptime = cluster->curtime + 5*1000;
#if 1
	prox->defaultstream = defaultqtv;

	prox->next = cluster->pendingproxies;
	cluster->pendingproxies = prox;
#else
	prox->next = qtv->pendingproxies;
	qtv->pendingproxies = prox;
	Net_SendConnectionMVD(qtv, prox);
#endif
}


void Fwd_ParseCommands(cluster_t *cluster, oproxy_t *prox)
{
	netmsg_t buf;
	int packetlength;
	int bytes;
	bytes = NET_WebSocketRecv(prox->sock, &prox->websocket, prox->inbuffer+prox->inbuffersize, sizeof(prox->inbuffer)-prox->inbuffersize, NULL);
	if (bytes < 0)
	{
		if (qerrno != NET_EWOULDBLOCK && qerrno != NET_EAGAIN)	//not a problem, so long as we can flush it later.
		{
			Sys_Printf(cluster, "network error from client proxy\n");
			prox->drop = true;	//drop them if we get any errors
			return;
		}
		bytes = 0;
	}
	else if (bytes == 0)
	{
		prox->drop = true;
		return;
	}

	prox->inbuffersize += bytes;

	for(;;)
	{
		if (prox->inbuffersize < 2)	//we do need at least 3 bytes for anything useful
			break;

		packetlength = prox->inbuffer[0] + (prox->inbuffer[1]<<8);
		packetlength -= 2;	//qqshka's inconsistent-upstream-sizes stupidity.
		if (packetlength+2 > prox->inbuffersize)
			break;

		InitNetMsg(&buf, prox->inbuffer+2, packetlength);
		buf.cursize = packetlength;

		while(buf.readpos < buf.cursize)
		{
			switch (ReadByte(&buf))
			{
			case qtv_clc_stringcmd:
				{
					char stringbuf[1024];
					ReadString(&buf, stringbuf, sizeof(stringbuf));
					QTV_Printf(prox->stream, "ds: %s\n", stringbuf);
				}
			
				break;
			default:
				Sys_Printf(cluster, "Received unrecognized packet type from downstream proxy.\n");
				buf.readpos = buf.cursize;
				break;
			}
		}
		packetlength+=2;
		memmove(prox->inbuffer, prox->inbuffer+packetlength, prox->inbuffersize - packetlength);
		prox->inbuffersize -= packetlength;
	}
}

void Net_TryFlushProxyBuffer(cluster_t *cluster, oproxy_t *prox)
{
	unsigned char *buffer;
	int length;
	int bufpos;

//	if (prox->drop)
//		return;

	while (prox->bufferpos >= MAX_PROXY_BUFFER)
	{	//so we never get any issues with wrapping..
		prox->bufferpos -= MAX_PROXY_BUFFER;
		prox->buffersize -= MAX_PROXY_BUFFER;
	}

	bufpos = prox->bufferpos&(MAX_PROXY_BUFFER-1);
	length = prox->buffersize - prox->bufferpos;
	if (length > MAX_PROXY_BUFFER-bufpos)	//cap the length correctly.
		length = MAX_PROXY_BUFFER-bufpos;
	if (!length)
		return;	//already flushed.
	buffer = prox->buffer + bufpos;

//	CheckMVDConsistancy(prox->buffer, prox->bufferpos, prox->buffersize);

	if (bufpos+length > MAX_PROXY_BUFFER)
		Sys_Printf(cluster, "oversize flush\n");

	if (prox->file)
		length = fwrite(buffer, 1, length, prox->file);
	else
		length = send(prox->sock, buffer, length, 0);


	switch (length)
	{
	case 0:	//eof / they disconnected
		prox->drop = true;
		prox->flushing = false;
		break;
	case -1:
		if (qerrno != NET_EWOULDBLOCK && qerrno != NET_EAGAIN)	//not a problem, so long as we can flush it later.
		{
			Sys_Printf(cluster, "network error from client proxy\n");
			prox->drop = true;	//drop them if we get any errors
			prox->flushing = false;
		}
		break;
	default:
		prox->bufferpos += length;
	}
}

void Net_ProxySendString(cluster_t *cluster, oproxy_t *prox, void *buffer)
{
	Net_ProxySend(cluster, prox, buffer, strlen(buffer));
}

void Net_ProxySend(cluster_t *cluster, oproxy_t *prox, void *buffer, int length)
{
	int wrap;

	if (!length)
		return;

	if (prox->websocket.websocket)
	{
		unsigned int c;
		int enclen = 0;
		int datatype = 2;	//1=utf-8, 2=binary

		/*work out how much buffer space we'll need*/
		if (datatype == 2)
			enclen += length;
		else
		{
			for (c = 0; c < length; c++)
			{
				if (((unsigned char*)buffer)[c] == 0 || ((unsigned char*)buffer)[c] >= 0x80)
					enclen += 2;
				else
					enclen += 1;
			}
		}

		if (prox->buffersize-prox->bufferpos + (enclen+4) > MAX_PROXY_BUFFER)
		{
			Net_TryFlushProxyBuffer(cluster, prox);	//try flushing
			if (prox->buffersize-prox->bufferpos + (enclen+4) > MAX_PROXY_BUFFER)	//damn, still too big.
			{	//they're too slow. hopefully it was just momentary lag
				if (!prox->flushing)
				{
					printf("QTV client is too lagged\n");
					prox->flushing = true;
				}
				return;
			}
		}

		if (enclen >= 126)
		{
			prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = 0x80|datatype;
			prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = 126;
			prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = enclen>>8;
			prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = enclen;
		}
		else
		{
			prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = 0x80|datatype;
			prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = enclen;
		}
		if (datatype == 2)
		{
			for(; length-->0; buffer = (char*)buffer+1)
				prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = *(unsigned char*)buffer;
		}
		else
		{	//utf-8 (or really just bytes with upper bits truncated. sue me.
			while(length-->0)
			{
				c = *(unsigned char*)buffer;
				buffer = (char*)buffer+1;
				if (!c)
					c |= 0x100;	/*will get truncated at the other end*/
				if (c >= 0x80)
				{
					prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = 0xc0 | (c>>6);
					prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = 0x80 | (c & 0x3f);
				}
				else
					prox->buffer[prox->buffersize++&(MAX_PROXY_BUFFER-1)] = c;
			}
		}
		Net_TryFlushProxyBuffer(cluster, prox);	//try flushing in a desperate attempt to reduce bugs in google chrome.
		return;
	}

	if (prox->buffersize-prox->bufferpos + length > MAX_PROXY_BUFFER)
	{
		Net_TryFlushProxyBuffer(cluster, prox);	//try flushing
		if (prox->buffersize-prox->bufferpos + length > MAX_PROXY_BUFFER)	//damn, still too big.
		{	//they're too slow. hopefully it was just momentary lag
			if (!prox->flushing)
			{
				printf("QTV client is too lagged\n");
				prox->flushing = true;
			}
			return;
		}
	}
#if 1
	//just simple
	prox->buffersize+=length;
	for (wrap = prox->buffersize-length; wrap < prox->buffersize; wrap++)
	{
		prox->buffer[wrap&(MAX_PROXY_BUFFER-1)] = *(unsigned char*)buffer;
		buffer = (char*)buffer+1;
	}
#else
	//we don't do multiple wrappings, the above check cannot succeed if it were required.

	//find the wrap point
	wrap = prox->buffersize-(prox->buffersize&(MAX_PROXY_BUFFER-1)) + MAX_PROXY_BUFFER;
	wrap = wrap - (prox->buffersize&(MAX_PROXY_BUFFER-1));	//the ammount of data we can fit before wrapping.

	if (wrap > length)
	{	//we don't wrap afterall
		memcpy(prox->buffer+(prox->buffersize)&(MAX_PROXY_BUFFER-1), buffer, length);
		prox->buffersize+=length;
		return;
	}
	memcpy(prox->buffer+prox->buffersize&(MAX_PROXY_BUFFER-1), buffer, wrap);
	buffer += wrap;
	length -= wrap;
	memcpy(prox->buffer, buffer, length);

	prox->buffersize+=length;
#endif
}

void Prox_SendMessage(cluster_t *cluster, oproxy_t *prox, char *buf, int length, int dem_type, unsigned int playermask)
{
	netmsg_t msg;
	char tbuf[16];
	InitNetMsg(&msg, tbuf, sizeof(tbuf));
	WriteByte(&msg, 0);
	WriteByte(&msg, dem_type);
	WriteLong(&msg, length);
	if (dem_type == dem_multiple)
		WriteLong(&msg, playermask);

	if (prox->buffersize-prox->bufferpos + length + msg.cursize > MAX_PROXY_BUFFER)
	{
		Net_TryFlushProxyBuffer(cluster, prox);	//try flushing
		if (prox->buffersize-prox->bufferpos + length + msg.cursize > MAX_PROXY_BUFFER)	//damn, still too big.
		{	//they're too slow. hopefully it was just momentary lag
			prox->flushing = true;
			return;
		}
	}


	Net_ProxySend(cluster, prox, msg.data, msg.cursize);

	Net_ProxySend(cluster, prox, buf, length);
}

void Fwd_SendDownstream(sv_t *qtv, void *buffer, int length)
{	//broadcasts data to all client proxies, with dont-buffer
	oproxy_t *prox;
	for (prox = qtv->proxies; prox; prox = prox->next)
	{
		Prox_SendMessage(qtv->cluster, prox, buffer, length, dem_qtvdata, (unsigned int)-1);
	}
}

void Fwd_SayToDownstream(sv_t *qtv, char *message)
{
	netmsg_t msg;
	char buffer[1024];

	InitNetMsg(&msg, buffer, sizeof(buffer));
	WriteByte(&msg, svc_print);
	WriteByte(&msg, PRINT_CHAT);
	WriteString2(&msg, "[QTV]");
	WriteString(&msg, message);

	Fwd_SendDownstream(qtv, msg.data, msg.cursize);
}

void Prox_SendPlayerStats(sv_t *qtv, oproxy_t *prox)
{
	char buffer[MAX_MSGLEN];
	netmsg_t msg;
	int player, snum;

	InitNetMsg(&msg, buffer, sizeof(buffer));

	for (player = 0; player < MAX_CLIENTS; player++)
	{
		for (snum = 0; snum < MAX_STATS; snum++)
		{
			if (qtv->map.players[player].stats[snum])
			{
				if ((unsigned)qtv->map.players[player].stats[snum] > 255)
				{
					WriteByte(&msg, svc_updatestatlong);
					WriteByte(&msg, snum);
					WriteLong(&msg, qtv->map.players[player].stats[snum]);
				}
				else
				{
					WriteByte(&msg, svc_updatestat);
					WriteByte(&msg, snum);
					WriteByte(&msg, qtv->map.players[player].stats[snum]);
				}
			}
		}

		if (msg.cursize)
		{
//			Prox_SendMessage(prox, msg.data, msg.cursize, dem_stats|(player<<3), (1<<player));
			msg.cursize = 0;
		}
	}
}

void Prox_SendInitialPlayers(sv_t *qtv, oproxy_t *prox, netmsg_t *msg)
{
	int i, j, flags;
	char buffer[64];

	for (i = 0; i < MAX_CLIENTS; i++)
	{
		if (!qtv->map.players[i].active) // interesting, is this set to false if player disconnect from server?
			continue;

		flags =   (DF_ORIGIN << 0) | (DF_ORIGIN << 1) | (DF_ORIGIN << 2)
				| (DF_ANGLES << 0) | (DF_ANGLES << 1) | (DF_ANGLES << 2) // angles is something what changed frequently, so may be not send it?
				| DF_EFFECTS
				| DF_SKINNUM // though it rare thingie, so better send it?
				| (qtv->map.players[i].dead   ? DF_DEAD : 0)
				| (qtv->map.players[i].gibbed ? DF_GIB  : 0)
				| DF_WEAPONFRAME // do we so really need it?
				| DF_MODEL; // generally, that why we wrote this function, so YES send this

		if (*qtv->map.players[i].userinfo && atoi(Info_ValueForKey(qtv->map.players[i].userinfo, "*spectator", buffer, sizeof(buffer))))
			flags = DF_MODEL; // oh, that spec, just sent his model, may be even better ignore him?

		WriteByte (msg, svc_playerinfo);
		WriteByte (msg, i);
		WriteShort (msg, flags);

		WriteByte (msg, qtv->map.players[i].current.frame); // always sent

		for (j = 0 ; j < 3 ; j++)
			if (flags & (DF_ORIGIN << j))
				WriteCoord (msg, qtv->map.players[i].current.origin[j], qtv->pext1);

		for (j = 0 ; j < 3 ; j++)
			if (flags & (DF_ANGLES << j))
				WriteShort (msg, qtv->map.players[i].current.angles[j]);

		if (flags & DF_MODEL) // generally, that why we wrote this function, so YES send this
			WriteByte (msg, qtv->map.players[i].current.modelindex);

		if (flags & DF_SKINNUM)
			WriteByte (msg, qtv->map.players[i].current.skinnum);

		if (flags & DF_EFFECTS)
			WriteByte (msg, qtv->map.players[i].current.effects);

		if (flags & DF_WEAPONFRAME)
			WriteByte (msg, qtv->map.players[i].current.weaponframe);
	}
}

void Net_GreetingMessage(oproxy_t *prox)
{
	char buffer[1024];
	netmsg_t msg;

	InitNetMsg(&msg, buffer, sizeof(buffer));
	WriteByte(&msg, svc_print);
	WriteByte(&msg, PRINT_HIGH);
	WriteString2(&msg, "Welcome to ");
	WriteString2(&msg, prox->stream->cluster->hostname);
	WriteString(&msg, "\n");

	Prox_SendMessage(prox->stream->cluster, prox, msg.data, msg.cursize, dem_qtvdata, (unsigned)-1);
}

void Net_SendConnectionMVD(sv_t *qtv, oproxy_t *prox)
{
	char buffer[MAX_MSGLEN*8];
	netmsg_t msg;
	int prespawn;

	//only send connection data if there's actual data to be sent
	//if not, the other end will get the data when we receive it anyway.
	if (!*qtv->map.mapname)
		return;

	InitNetMsg(&msg, buffer, sizeof(buffer));

	prox->flushing = false;

	BuildServerData(qtv, &msg, 0, NULL);
	Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
	msg.cursize = 0;

	for (prespawn = 0;prespawn >= 0;)
	{
		prespawn = SendList(qtv, prespawn, qtv->map.soundlist, svc_soundlist, &msg);
		Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
		msg.cursize = 0;
	}

	for (prespawn = 0;prespawn >= 0;)
	{
		prespawn = SendList(qtv, prespawn, qtv->map.modellist, svc_modellist, &msg);
		Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
		msg.cursize = 0;
	}

	Net_TryFlushProxyBuffer(qtv->cluster, prox);	//that should be enough data to fill a packet.

	for(prespawn = 0;prespawn>=0;)
	{
		prespawn = Prespawn(qtv, 0, &msg, prespawn, MAX_CLIENTS-1);

		Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
		msg.cursize = 0;
	}

	//playerstates are delta-compressed, unfortunatly this isn't qwd (thanks to qqshka for showing my folly)
	Prox_SendInitialPlayers(qtv, prox, &msg);
	Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
	msg.cursize = 0;

	//we do need to send entity states.
	Prox_SendInitialEnts(qtv, prox, &msg);
	Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
	msg.cursize = 0;

	WriteByte(&msg, svc_stufftext);
	WriteString(&msg, "skins\n");
	Prox_SendMessage(qtv->cluster, prox, msg.data, msg.cursize, dem_read, (unsigned)-1);
	msg.cursize = 0;

	Net_TryFlushProxyBuffer(qtv->cluster, prox);

	Prox_SendPlayerStats(qtv, prox);
	Net_TryFlushProxyBuffer(qtv->cluster, prox);

	if (!qtv->cluster->lateforward)
		Net_ProxySend(qtv->cluster, prox, qtv->buffer, qtv->forwardpoint);	//send all the info we've not yet processed (but have already forwarded).


	if (prox->flushing)
	{
		Sys_Printf(qtv->cluster, "Connection data is too big, dropping proxy client\n");
		prox->drop = true;	//this is unfortunate...
	}
	else
		Net_TryFlushProxyBuffer(qtv->cluster, prox);
}


oproxy_t *Net_FileProxy(sv_t *qtv, char *filename)
{
	oproxy_t *prox;
	FILE *f;

	f = fopen(filename, "wb");
	if (!f)
		return NULL;

	//no full proxy check, this is going to be used by proxy admins, who won't want to have to raise the limit to start recording.

	prox = malloc(sizeof(*prox));
	if (!prox)
		return NULL;
	memset(prox, 0, sizeof(*prox));

	prox->sock = INVALID_SOCKET;
	prox->file = f;

	prox->next = qtv->proxies;
	qtv->proxies = prox;

	qtv->cluster->numproxies++;

	Net_SendConnectionMVD(qtv, prox);

	return prox;
}

qboolean Net_StopFileProxy(sv_t *qtv)
{
	oproxy_t *prox;
	for (prox = qtv->proxies; prox; prox = prox->next)
	{
		if (prox->file)
		{
			prox->drop = true;
			return true;
		}
	}
	return false;
}



void SV_ForwardStream(sv_t *qtv, void *buffer, int length)
{	//forward the stream on to connected clients
	oproxy_t *prox, *next, *fre;

	CheckMVDConsistancy(buffer, 0, length);


	while (qtv->proxies && qtv->proxies->drop)
	{
		next = qtv->proxies->next;
		fre = qtv->proxies;
		if (fre->file)
			fclose(fre->file);
		else
			closesocket(fre->sock);
		free(fre);
		qtv->cluster->numproxies--;
		qtv->proxies = next;
	}

	for (prox = qtv->proxies; prox; prox = prox->next)
	{
		while (prox->next && prox->next->drop)
		{
			next = prox->next->next;
			fre = prox->next;
			if (fre->file)
				fclose(fre->file);
			else
				closesocket(fre->sock);
			if (fre->srcfile)
				fclose(fre->srcfile);
			free(fre);
			qtv->cluster->numproxies--;
			prox->next = next;
		}

		if (prox->flushing)	//don't send it if we're trying to empty thier buffer.
		{
			if (prox->buffersize == prox->bufferpos)
			{
				if (!qtv->parsingconnectiondata)
					Net_SendConnectionMVD(qtv, prox);	//they're up to date, resend the connection info.
			}
			else
			{
				Net_TryFlushProxyBuffer(qtv->cluster, prox);	//try and flush it.
				continue;
			}
		}

		if (prox->drop)
			continue;

		//add the new data
		Net_ProxySend(qtv->cluster, prox, buffer, length);

		Net_TryFlushProxyBuffer(qtv->cluster, prox);
//		Net_TryFlushProxyBuffer(qtv->cluster, prox);
//		Net_TryFlushProxyBuffer(qtv->cluster, prox);

#ifndef _MSC_VER
	#warning This is not the place for this
#endif
		if (prox->sock != INVALID_SOCKET)
		{
			Fwd_ParseCommands(qtv->cluster, prox);
		}
	}
}

/*wrapper around recv to handle websocket connections*/
int NET_WebSocketRecv(SOCKET sock, wsrbuf_t *ws, unsigned char *out, unsigned int outlen, int *clen)
{
	unsigned int mask = 0;
	unsigned int paylen;
	int len, i;

	if (clen)
		*clen = -1;
	if (!ws->websocket)
		return recv(sock, out, outlen, 0);

	if (!ws->wsbuflen)
	{
		len = recv(sock, ws->wsbuf, 2, 0);
		if (len > 0)
			ws->wsbuflen+=2;
		else
			return len;
	}
	if (ws->wsbuflen >= 2)
	{
		unsigned short ctrl = (ws->wsbuf[0]<<8) | ws->wsbuf[1];
		len = 2;
		if ((ctrl & 0x7f) == 127)
			len += 8;
		else if ((ctrl & 0x7f) == 126)
			len += 2;
		if (ctrl & 0x80)
			len += 4;
		if (ws->wsbuflen < len)
		{
			paylen = recv(sock, ws->wsbuf+ws->wsbuflen, len - ws->wsbuflen, 0);
			if (paylen > 0)
				ws->wsbuflen += paylen;
			else
				return paylen;
		}

		/*headers are complete*/
		if (ws->wsbuflen >= len)
		{
			if ((ctrl & 0x7f) == 127)
			{
//				paylen = paylen = ((ws->wsbuf[2]<<56) | (ws->wsbuf[3]<<48) | (ws->wsbuf[4]<<40) | (ws->wsbuf[5]<<32) | (ws->wsbuf[6]<<24) | (ws->wsbuf[7]<<16) | (ws->wsbuf[8]<<8) | (ws->wsbuf[9]<<0);
//				if (paylen < 65536)
					return 0;	//error
			}
			else if ((ctrl & 0x7f) == 126)
			{
				paylen = (ws->wsbuf[2]<<8) | ws->wsbuf[3];
				if (paylen < 126)
					return 0;	//error
			}
			else
				paylen = ctrl & 0x7f;

			if (ctrl & 0x80)
			{
				((unsigned char*)&mask)[0] = ws->wsbuf[ws->wsbuflen-4];
				((unsigned char*)&mask)[1] = ws->wsbuf[ws->wsbuflen-3];
				((unsigned char*)&mask)[2] = ws->wsbuf[ws->wsbuflen-2];
				((unsigned char*)&mask)[3] = ws->wsbuf[ws->wsbuflen-1];
			}
			if (!(ctrl & 0x8000))
				return 0;	//can't handle fragmented frames

			switch((ctrl>>8) & 0xf)
			{
			case 1: /*text frame*/
				len = 0;
				while (outlen>len && ws->wspushed < paylen)
				{
					unsigned char n;
					ctrl = recv(sock, &n, 1, 0);	//FIXME: not my fastest code...
					if (ctrl <= 0)
						return len>0?len:ctrl;

					n ^= ((unsigned char*)&mask)[(ws->wspushed++)&3];
					
					if (ws->wsbits)
					{
						*out++ = ((ws->wsbits&0x1f)<<6) | (n & 0x3f);
						len++;
						ws->wsbits = 0;
					}
					else if ((n & 0xe0) == 0xc0)
					{
						ws->wsbits = n;
					}
					else if (n & 0x80)
						return 0; //error
					else
					{
						*out++ = n;
						len++;
					}
				}
				if (ws->wspushed == paylen)
				{
					if (ws->wsbits)
						return 0; //error
					if (clen)
						*clen = ws->wspushed;
					ws->wspushed = 0;
					ws->wsbuflen = 0;
				}
				return len;
			case 2: /*binary frame*/
				if (outlen > paylen - ws->wspushed)
					outlen = paylen - ws->wspushed;
				len = recv(sock, out, outlen, 0);
				if (len > 0)
				{
					for(i = 0; i < len; i++)
						out[i] ^= ((unsigned char*)&mask)[(ws->wspushed+i)&3];
					ws->wspushed += len;
				}
				if (paylen == ws->wspushed)
				{
					/*success! move on to the next*/
					if (clen)
						*clen = ws->wspushed;
					ws->wspushed = 0;
					ws->wsbuflen = 0;
				}
				return len;
			case 8: /*close*/
			case 9: /*ping*/
			case 10: /*pong*/
			default:
				return 0; //unsupported
			}
			return 0;
		}
		return 0;
	}
	else
		return 0;
}

//returns true if the pending proxy should be unlinked
//truth does not imply that it should be freed/released, just unlinked.
qboolean SV_ReadPendingProxy(cluster_t *cluster, oproxy_t *pend)
{
	//drop: ignored if flushing is still set. clear flushing and set drop on errors.
	char tempbuf[512];
	unsigned char *s;
	unsigned char *e;
	char *colon;
	float clientversion = 0;
	int len;
	qboolean eoh;
	int headersize;
	qboolean raw;
	sv_t *qtv;

	if (pend->drop && !pend->flushing)
	{
		printf("pending drop\n");
		if (pend->srcfile)
			fclose(pend->srcfile);
		if (pend->sock != INVALID_SOCKET)
			closesocket(pend->sock);
		free(pend);
		cluster->numproxies--;
		return true;
	}
#define QTVSVHEADER "QTVSV 1.1\n"

	Net_TryFlushProxyBuffer(cluster, pend);

	if (pend->flushing)
	{
		if (pend->srcfile)
		{
#if 0
			//bufferend = transmit point
			//buffersize = write point
			if (bufferend < buffersize)
				space = (MAX_PROXY_BUFFER - pend->buffersize) + pend->bufferend;
			else
				space = pend->bufferend - pend->buffersize;

			if (space < 256)	/*don't bother reading if we're dribbling*/
				return false;
			if (space > 0)	/*never fully saturate so as to not confuse the ring*/
				space--;

			if (space > MAX_PROXY_BUFFER - 
			fread(prox->buffer + pend->buffersize, 1, space, pend->srcfile);
#else
			if (pend->bufferpos == pend->buffersize)
			{
				char buffer[MAX_PROXY_BUFFER/2];
				pend->droptime = cluster->curtime + 5*1000;
				len = fread(buffer, 1, sizeof(buffer), pend->srcfile);
				if (!len)
				{
					fclose(pend->srcfile);
					pend->srcfile = NULL;
				}
				Net_ProxySend(cluster, pend, buffer, len);
			}
#endif
			return false;	//don't try reading anything yet
		}

		if (pend->bufferpos != pend->buffersize)
			return false;
		pend->flushing = false;
		if (pend->drop)
			return false;
	}

	if (pend->droptime < cluster->curtime)
	{
		printf("pending timeout\n");
		pend->drop = true;
		pend->flushing = false;
		return false;
	}

	len = sizeof(pend->inbuffer) - pend->inbuffersize - 1;
	len = NET_WebSocketRecv(pend->sock, &pend->websocket, pend->inbuffer+pend->inbuffersize, len, NULL);
	if (len == 0)
	{
		pend->drop = true;
		return false;
	}
	else if (len > 0)
		pend->droptime = cluster->curtime + 5*1000;
	if (len < 0)
	{
		return false;
	}

	pend->inbuffersize += len;
	pend->inbuffer[pend->inbuffersize] = '\0';

	if (pend->inbuffersize >= 4)
	{
		if (!strncmp(pend->inbuffer, "qizmo\n", 6))
		{
			wsrbuf_t ws = pend->websocket;
			SOCKET sock;
			//carries unreliable packets
			printf("tcpconnect\n");
			if (pend->srcfile)
				fclose(pend->srcfile);
			sock = pend->sock;
			free(pend);
			cluster->numproxies--;

			send(sock, "qizmo\n", 6, 0);
			QW_TCPConnection(cluster, sock, ws);

			return true;
		}
		if (pend->websocket.websocket && !strncmp(pend->inbuffer, "\xff\xff\xff\xff", 4))
		{
			wsrbuf_t ws = pend->websocket;
			SOCKET sock;
			//carries unreliable packets
			printf("wsconnect\n");
			if (pend->srcfile)
				fclose(pend->srcfile);
			sock = pend->sock;
			free(pend);
			cluster->numproxies--;

			QW_TCPConnection(cluster, sock, ws);

			return true;
		}
		if (ustrncmp(pend->inbuffer, "QTV\r", 4) && ustrncmp(pend->inbuffer, "QTV\n", 4) && ustrncmp(pend->inbuffer, "GET ", 4) && ustrncmp(pend->inbuffer, "POST ", 5))
		{	//I have no idea what the smeg you are.
			pend->drop = true;

			pend->inbuffer[16] = 0;
			Sys_Printf(cluster, "pending proxy: Connect for unrecognized protocol %s\n", pend->inbuffer);
			return false;
		}
	}

	//make sure there's a double \n somewhere

	eoh = false;
	for (s = pend->inbuffer; s<=pend->inbuffer+pend->inbuffersize; s++)
	{
		if (s[0] == '\n' && s[1] == '\n')
		{
			s += 2;
			eoh = true;
			break;
		}
		if (s[0] == '\n' && s[1] == '\r' && s[2] == '\n')
		{
			s += 3;
			eoh = true;
			break;
		}
	}
	if (!eoh)
		return false;	//don't have enough yet
	headersize = s - pend->inbuffer;

	if (!ustrncmp(pend->inbuffer, "POST ", 5))
	{
		HTTPSV_PostMethod(cluster, pend, (char*)s);

		return false;	//not keen on this..
	}
	else if (!ustrncmp(pend->inbuffer, "GET ", 4))
	{
		pend->drop = true;
		HTTPSV_GetMethod(cluster, pend);
		pend->flushing = true;
		memmove(pend->inbuffer, pend->inbuffer+headersize, pend->inbuffersize-headersize);
		pend->inbuffersize -= headersize;
		return SV_ReadPendingProxy(cluster, pend);
	}

	raw = false;

	qtv = pend->defaultstream;

	e = pend->inbuffer;
	s = e;
	while(*e)
	{
		if (*e == '\n' || *e == '\r')
		{
			*e = '\0';
			colon = strchr((char*)s, ':');
			if (*s)
			{
				if (!colon)
				{
					if (!ustrcmp(s, "QTV"))
					{
						//just a qtv request (as in, not http or some other protocol)
					}
					else if (!ustrcmp(s, "SOURCELIST"))
					{	//lists sources that are currently playing
						Net_ProxySendString(cluster, pend, QTVSVHEADER);
						if (!cluster->servers)
						{
							Net_ProxySendString(cluster, pend, "PERROR: No sources currently available\n");
						}
						else
						{
							for (qtv = cluster->servers; qtv; qtv = qtv->next)
							{
								if (clientversion > 1)
								{
									int plyrs = 0;
									int i;
									for (i = 0; i < MAX_CLIENTS; i++)
									{
										if (*qtv->map.players[i].userinfo)
											plyrs++;
									}
									sprintf(tempbuf, "SRCSRV: %s\n", qtv->server);
									Net_ProxySendString(cluster, pend, tempbuf);
									sprintf(tempbuf, "SRCHOST: %s\n", qtv->map.hostname);
									Net_ProxySendString(cluster, pend, tempbuf);
									sprintf(tempbuf, "SRCPLYRS: %i\n", plyrs);
									Net_ProxySendString(cluster, pend, tempbuf);
									sprintf(tempbuf, "SRCVIEWS: %i\n", qtv->numviewers);
									Net_ProxySendString(cluster, pend, tempbuf);
									sprintf(tempbuf, "SRCID: %i\n", qtv->streamid);	//final part of each source
									Net_ProxySendString(cluster, pend, tempbuf);
								}
								else
								{
									sprintf(tempbuf, "ASOURCE: %i: %15s: %15s\n", qtv->streamid, qtv->server, qtv->map.hostname);
									Net_ProxySendString(cluster, pend, tempbuf);
								}
							}
							qtv = NULL;
						}
						Net_ProxySendString(cluster, pend, "\n");
						pend->flushing = true;
					}
					else if (!ustrcmp(s, "REVERSE"))
					{	//this is actually a server trying to connect to us
						//start up a new stream

						if (cluster->reverseallowed)
						{
							qtv = QTV_NewServerConnection(cluster, 0, "reverse"/*server*/, "", true, AD_REVERSECONNECT, false, 0);

							Net_ProxySendString(cluster, pend, QTVSVHEADER);
							Net_ProxySendString(cluster, pend, "VERSION: 1\n");
							Net_ProxySendString(cluster, pend, "REVERSED\n");
							Net_ProxySendString(cluster, pend, "\n");

							//switch over the socket to the actual source connection rather than the pending
							Net_TryFlushProxyBuffer(cluster, pend); //flush anything... this isn't ideal, but should be small enough
							qtv->sourcesock = pend->sock;
							pend->sock = INVALID_SOCKET;

							memcpy(qtv->buffer, pend->inbuffer + headersize, pend->inbuffersize - headersize);
							qtv->parsingqtvheader = true;
							return false;
						}
						else
						{
							Net_ProxySendString(cluster, pend, QTVSVHEADER
																"PERROR: Reverse connections are disabled on this proxy\n");
							pend->flushing = true;
						}
					}
					else if (!ustrcmp(s, "RECEIVE"))
					{	//a client connection request without a source
						if (cluster->numservers == 1)
						{	//only one stream anyway
							qtv = cluster->servers;
						}
						else
						{	//try and hunt down an explicit stream (rather than a user-recorded one)
							int numfound = 0;
							sv_t *suitable = NULL;	//shush noisy compilers
							for (qtv = cluster->servers; qtv; qtv = qtv->next)
							{
								if (qtv->autodisconnect == AD_NO)
								{
									suitable = qtv;
									numfound++;
								}
							}
							if (numfound == 1)
								qtv = suitable;
						}
						if (!qtv)
						{
							Net_ProxySendString(cluster, pend, QTVSVHEADER);
							Net_ProxySendString(cluster, pend, "PERROR: Multiple streams are currently playing\n");
							Net_ProxySendString(cluster, pend, "\n");
							pend->flushing = true;
						}
					}
					else if (!ustrcmp(s, "DEMOLIST"))
					{	//lists sources that are currently playing
						int i;

						Cluster_BuildAvailableDemoList(cluster);

						Net_ProxySendString(cluster, pend, QTVSVHEADER);
						if (!cluster->availdemoscount)
						{
							Net_ProxySendString(cluster, pend, "PERROR: No demos currently available\n");
						}
						else
						{
							for (i = 0; i < cluster->availdemoscount; i++)
							{
								sprintf(tempbuf, "ADEMO: %i: %15s\n", cluster->availdemos[i].size, cluster->availdemos[i].name);
								Net_ProxySendString(cluster, pend, tempbuf);
							}
							qtv = NULL;
						}
						Net_ProxySendString(cluster, pend, "\n");
						pend->flushing = true;
					}
					else if (!ustrcmp(s, "AUTH"))
					{	//lists the demos available on this proxy
						//part of the connection process, can be ignored if there's no password
					}
					else
						printf("Unrecognized token in QTV connection request (%s)\n", s);
				}
				else
				{
					*colon++ = '\0';
					if (!ustrcmp(s, "VERSION"))
					{
						clientversion = atof(colon);
					}
					else if (!ustrcmp(s, "RAW"))
						raw = atoi(colon);
					/*else if (!ustrcmp(s, "ROUTE"))
					{	//pure rewroute...
						//is this safe? probably not.
						s = QTVSVHEADER
							"PERROR: ROUTE command not yet implemented\n"
							"\n";
						Net_ProxySend(cluster, pend, s, ustrlen(s));
						pend->flushing = true;
					}
					*/
					else if (!ustrcmp(s, "SOURCE"))
					{	//connects, creating a new source
						char *t;
						while (*colon == ' ')
							colon++;
						for (t = colon; *t; t++)
							if (*t < '0' || *t > '9')
								break;
						if (*t)
							qtv = QTV_NewServerConnection(cluster, 0, colon, "", false, AD_WHENEMPTY, true, false);
						else
						{
							//numerical source, use a stream id.
							for (qtv = cluster->servers; qtv; qtv = qtv->next)
								if (qtv->streamid == atoi(colon))
									break;
						}
					}
					else if (!ustrcmp(s, "DEMO"))
					{	//starts a demo off the server... source does the same thing though...
						char buf[256];
	
						snprintf(buf, sizeof(buf), "demo:%s", colon);
						qtv = QTV_NewServerConnection(cluster, 0, buf, "", false, AD_WHENEMPTY, true, false);
						if (!qtv)
						{
							Net_ProxySendString(cluster, pend,	QTVSVHEADER
												"PERROR: couldn't open demo\n"
												"\n");
							pend->flushing = true;
						}
					}
					else if (!ustrcmp(s, "AUTH"))
					{	//lists the demos available on this proxy
						//part of the connection process, can be ignored if there's no password
					}
					else
						printf("Unrecognized token in QTV connection request (%s)\n", s);
				}
			}
			s = e+1;
		}

		e++;
	}

	if (!pend->flushing)
	{
		if (clientversion < 1)
		{
			Net_ProxySendString(cluster, pend,	QTVSVHEADER
								"PERROR: Requested protocol version not supported\n"
								"\n");
			pend->flushing = true;
		}
		else if (!qtv)
		{
			Net_ProxySendString(cluster, pend,	QTVSVHEADER
								"PERROR: No stream selected\n"
								"\n");
			pend->flushing = true;
		}
	}
	if (pend->flushing)
		return false;


	if (qtv->usequakeworldprotocols)
	{
		Net_ProxySendString(cluster, pend,	QTVSVHEADER
							"PERROR: This version of QTV is unable to convert QuakeWorld to QTV protocols\n"
							"\n");
		pend->flushing = true;
		return false;
	}
	if (cluster->maxproxies>=0 && cluster->numproxies >= cluster->maxproxies)
	{
		Net_ProxySendString(cluster, pend,	QTVSVHEADER
							"TERROR: This QTV has reached it's connection limit\n"
							"\n");
		pend->flushing = true;
		return false;
	}

	pend->next = qtv->proxies;
	qtv->proxies = pend;

	if (!raw)
	{
		Net_ProxySendString(cluster, pend,	QTVSVHEADER);
		Net_ProxySendString(cluster, pend,	"BEGIN: ");
		Net_ProxySendString(cluster, pend,	qtv->server);
		Net_ProxySendString(cluster, pend,	"\n\n");
	}
//	else if (passwordprotected)	//raw mode doesn't support passwords, so reject them
//	{
//		pend->flushing = true;
//		return;
//	}

	pend->stream = qtv;

	memmove(pend->inbuffer, pend->inbuffer+headersize, pend->inbuffersize-headersize);
	pend->inbuffersize -= headersize;

	Net_GreetingMessage(pend);
	Net_SendConnectionMVD(qtv, pend);

	return true;
}