[ViewVC] Diff of: cvs/deliantra/server/socket/lowlevel.C

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.25 by root, Sun Dec 17 19:14:00 2006 UTC vs.
Revision 1.50 by root, Thu Jul 12 19:36:58 2007 UTC

…		…
1	/*	1	/*
2	CrossFire, A Multiplayer game for X-windows	2	* This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3		3	*
		4	* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
4	Copyright (C) 1992 Frank Tore Johansen	5	* Copyright (©) 1992,2007 Frank Tore Johansen
5		6	*
6	This program is free software; you can redistribute it and/or modify	7	* Crossfire TRT is free software: you can redistribute it and/or modify
7	it under the terms of the GNU General Public License as published by	8	* it under the terms of the GNU General Public License as published by
8	the Free Software Foundation; either version 2 of the License, or	9	* the Free Software Foundation, either version 3 of the License, or
9	(at your option) any later version.	10	* (at your option) any later version.
10		11	*
11	This program is distributed in the hope that it will be useful,	12	* This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.	15	* GNU General Public License for more details.
15		16	*
16	You should have received a copy of the GNU General Public License	17	* You should have received a copy of the GNU General Public License
17	along with this program; if not, write to the Free Software	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
20	The author can be reached via e-mail to mark@pyramid.com
21	*/
22
23	/**
24	* \file
25	* Low-level socket-related functions.
26	*	19	*
27	* \date 2003-12-02	20	* The authors can be reached via e-mail to <crossfire@schmorp.de>
28	*
29	* Contains some base functions that both the client and server
30	* can use. As such, depending what we are being compiled for will
31	* determine what we can include. the client is designed have
32	* CFCLIENT defined as part of its compile flags.
33	*/	21	*/
34		22
35	using namespace std;	23	using namespace std;
36		24
37	#include <global.h>	25	#include <global.h>
38	#include <sproto.h>	26	#include <sproto.h>
39	#include <cstdarg>	27	#include <cstdarg>
40		28
41	#ifdef __linux__	29	#if HAVE_TCP_INFO
42	# include <sys/types.h>	30	# include <sys/types.h>
43	# include <sys/socket.h>	31	# include <sys/socket.h>
44	# include <netinet/in.h>	32	# include <netinet/in.h>
45	# define TCP_HZ 1000 // sorry...
46	# include <netinet/tcp.h>	33	# include <netinet/tcp.h>
47	#endif	34	#endif
48		35
49	// use a really low timeout, as it doesn't cost any bandwidth, and you can	36	#define HAVE_SIOCOUTQ 1 //TODO configure.ac support
50	// easily die in 20 seconds...	37	#if HAVE_SIOCOUTQ
		38	# include <linux/sockios.h>
		39	#endif
		40
		41	// disconnect a socket after this many seconds without an ack
51	#define SOCKET_TIMEOUT1 10	42	#define SOCKET_TIMEOUT 8.
52	#define SOCKET_TIMEOUT2 20	43
		44	// force a packet when idle for more than this many seconds,
		45	// forcing an ack regularly.
		46	#define IDLE_PING 2.
53		47
54	void	48	void
55	client::flush ()	49	client::flush ()
56	{	50	{
57	#ifdef __linux__	51	if (destroyed ())
		52	return;
		53
		54	# if HAVE_SIOCOUTQ
		55	{
		56	int value;
		57
		58	if (!ioctl (fd, SIOCOUTQ, &value))
		59	outq = value;
		60	}
		61	# endif
		62
		63	#if HAVE_TCP_INFO
		64	// check about once per second, spread evenly over all clients
		65	// do this only when player is active
		66	if (!((pticks + fd) & 7) && pl && pl->active)
		67	{
58	// check time of last ack, and, if too old, kill connection	68	// check time of last ack, and, if too old, kill connection
59	struct tcp_info tcpi;	69	struct tcp_info tcpi;
60	socklen_t len = sizeof (tcpi);	70	socklen_t len = sizeof (tcpi);
61		71
62	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))	72	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
63	{	73	{
64	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;	74	if (tcpi.tcpi_snd_mss)
		75	mss = tcpi.tcpi_snd_mss;
65		76
66	rtt = tcpi.tcpi_rtt;	77	rtt = tcpi.tcpi_rtt;
67	rttvar = tcpi.tcpi_rttvar;	78	rttvar = tcpi.tcpi_rttvar;
68		79
69	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s	80	if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
70	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s
71	{	81	{
		82	send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
		83	write_outputbuffer ();
		84
72	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,	85	LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
73	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);	86	(unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
74	destroy ();	87	destroy ();
		88	}
75	}	89	}
76	}	90	}
77	#endif	91	#endif
78		92
79	/**	93	/**
81	*	95	*
82	* When the socket is clear to write, and we have backlogged data, this	96	* When the socket is clear to write, and we have backlogged data, this
83	* is called to write it out.	97	* is called to write it out.
84	*/	98	*/
85		99
86	if (!outputbuffer.len \|\| socket_ev.poll () & PE_W)	100	// write a nop to the socket at least every IDLE_NOP seconds.
		101	if (!outputbuffer.len)
		102	{
		103	if (last_send + IDLE_PING <= NOW && pl && pl->active)
		104	{
		105	// this is a bit ugly, but map1/map1a seem to be the only
		106	// nop'able commands and they are quite small.
		107	packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
		108	send_packet (sl);
		109	}
		110	else
		111	return;
		112	}
		113
		114	if (socket_ev.poll () & PE_W)
87	return;	115	return;
88		116
		117	last_send = NOW;
89	write_outputbuffer ();	118	write_outputbuffer ();
90	}	119	}
91		120
92	void	121	void
93	client::write_outputbuffer ()	122	client::write_outputbuffer ()
…		…
103	/* wrap back to start of buffer */	132	/* wrap back to start of buffer */
104	if (outputbuffer.start == SOCKETBUFSIZE)	133	if (outputbuffer.start == SOCKETBUFSIZE)
105	outputbuffer.start = 0;	134	outputbuffer.start = 0;
106		135
107	outputbuffer.len -= res;	136	outputbuffer.len -= res;
108	#ifdef CS_LOGSTATS
109	cst_tot.obytes += res;
110	cst_lst.obytes += res;
111	#endif
112	}	137	}
113	else if (res == 0)	138	else if (res == 0)
114	{	139	{
115	LOG (llevError, "socket write failed, connection closed.\n");	140	LOG (llevError, "socket write failed, connection closed.\n");
116	destroy ();	141	destroy ();
…		…
183		208
184	/**	209	/**
185	* Dispatch table for the server.	210	* Dispatch table for the server.
186	*/	211	*/
187	static struct packet_type packets[] = {	212	static struct packet_type packets[] = {
188	{"ncom", PC(NewPlayerCmd) PF_PLAYING },	213	{"ncom", PC(NewPlayerCmd) PF_PLAYING \| PF_COMMAND6 },
189	{"command", PC(PlayerCmd) PF_PLAYING },	214	{"command", PC(PlayerCmd) PF_PLAYING \| PF_COMMAND0 },
190		215
191	{"examine", PC(ExamineCmd) PF_PLAYING },	216	{"examine", PC(ExamineCmd) PF_PLAYING },
		217	{"ex", PC(ExCmd) PF_PLAYING },
192	{"apply", PC(ApplyCmd) PF_PLAYING },	218	{"apply", PC(ApplyCmd) PF_PLAYING },
193	{"reply", PC(ReplyCmd) PF_IMMEDIATE },
194	{"lookat", PC(LookAt) PF_PLAYING },	219	{"lookat", PC(LookAt) PF_PLAYING },
195	{"lock", PC(LockItem) PF_PLAYING },	220	{"lock", PC(LockItem) PF_PLAYING },
196	{"mark", PC(MarkItem) PF_PLAYING },	221	{"mark", PC(MarkItem) PF_PLAYING },
197	{"move", PC(MoveCmd) PF_PLAYING },	222	{"move", PC(MoveCmd) PF_PLAYING },
198	{"exti", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
199	{"ext", PC(ExtCmd) 0 }, /* CF+ */	223	{"ext", PC(ExtCmd) 0 }, // CF+
200	{"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */	224	{"mapredraw", PC(MapRedrawCmd) 0 },
201	{"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */	225	{"mapinfo", PC(MapInfoCmd) 0 }, // CF+
202		226
		227	{"reply", SC(ReplyCmd) 0 },
		228	{"exti", SC(ExtiCmd) 0 }, // CF+
203	{"addme", SC(AddMeCmd) PF_IMMEDIATE },	229	{"addme", SC(AddMeCmd) 0 },
204	{"askface", SC(SendFaceCmd) PF_IMMEDIATE }, /* Added: phil */	230	{"askface", SC(AskFaceCmd) 0 },
205	{"requestinfo", SC(RequestInfo) PF_IMMEDIATE },	231	{"requestinfo", SC(RequestInfo) 0 },
206	{"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },	232	{"setfacemode", SC(SetFaceMode) 0 },
207	{"setsound", SC(SetSound) PF_IMMEDIATE },	233	{"setsound", SC(SetSound) 0 },
208	{"setup", SC(SetUp) PF_IMMEDIATE },	234	{"setup", SC(SetUp) 0 },
209	{"version", SC(VersionCmd) PF_IMMEDIATE },	235	{"version", SC(VersionCmd) 0 },
210	{"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /Added: tchize /	236	{"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /Added: tchize /
211	{"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /Added: tchize /	237	{"toggleextendedtext", SC(ToggleExtendedText) 0 }, /Added: tchize /
212	{"asksmooth", SC(AskSmooth) PF_IMMEDIATE }, /Added: tchize (smoothing technologies) /	238	{"asksmooth", SC(AskSmooth) 0 }, /Added: tchize (smoothing technologies) /
213	};	239	};
214		240
215	bool	241	bool
216	client::may_execute (const packet_type *pkt) const	242	client::may_execute (const packet_type *pkt) const
217	{	243	{
218	return (!(pkt->flags & PF_PLAYER) \|\| pl)	244	return (!(pkt->flags & PF_PLAYER) \|\| pl)
219	&& (!(pkt->flags & PF_PLAYING) \|\| (pl && pl->state == ST_PLAYING));	245	&& (!(pkt->flags & PF_PLAYING) \|\| state == ST_PLAYING);
		246	}
		247
		248	// HACK: some commands currently should be executed
		249	// even when the player is frozen. this hack detects
		250	// those commands. it should be folded into may_execute,
		251	// but kept seperate to emphasise the hack aspect, i.e.
		252	// do it better, then remove.
		253	static bool
		254	always_immediate (const client ns, const packet_type pkt, const char *data, int len)
		255	{
		256	if (!(pkt->flags & (PF_COMMAND0 \| PF_COMMAND6)))
		257	return false;
		258
		259	if (!ns->pl \|\| !ns->pl->ob \|\| !ns->pl->ob->map)
		260	return false;
		261
		262	if (pkt->flags & PF_COMMAND6)
		263	{
		264	data += 6;
		265	len -= 6;
		266	}
		267
		268	if (len > 4 && !strncmp (data, "say " , 4))
		269	return true;
		270	if (len > 5 && !strncmp (data, "chat ", 5))
		271	return true;
		272
		273	return false;
220	}	274	}
221		275
222	void	276	void
223	client::execute (const packet_type pkt, char data, int datalen)	277	client::execute (const packet_type pkt, char data, int datalen)
224	{	278	{
225	if (may_execute (pkt))	279	if (may_execute (pkt) \|\| always_immediate (this, pkt, data, datalen))
226	{	280	{
227	//TODO: only one format	281	//TODO: only one format
228	if (pkt->flags & PF_PLAYER)	282	if (pkt->flags & PF_PLAYER)
229	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);	283	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
230	else	284	else
…		…
271	}	325	}
272		326
273	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)	327	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
274	if (!strcmp ((char *)inbuf + 2, pkt->name))	328	if (!strcmp ((char *)inbuf + 2, pkt->name))
275	{	329	{
276	if (pkt->flags & PF_IMMEDIATE)	330	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
		331	queue_command (pkt, data, datalen);
		332	else
277	execute (pkt, data, datalen);	333	execute (pkt, data, datalen);
278	else
279	queue_command (pkt, data, datalen);
280		334
281	goto next_packet;	335	goto next_packet;
282	}	336	}
283		337
284	/* If we get here, we didn't find a valid command. Logging	338	// If we get here, we didn't find a valid command.
285	* this might be questionable, because a broken client/malicious
286	* user could certainly send a whole bunch of invalid commands.
287	*/
288	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);	339	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
289	next_packet:	340	next_packet:
290	skip_packet (pkt_len);	341	skip_packet (pkt_len);
291		342
292	// input buffer has space again	343	// input buffer has space again
…		…
298	// callback called when socket is either readable or writable	349	// callback called when socket is either readable or writable
299	void	350	void
300	client::socket_cb (iow &w, int got)	351	client::socket_cb (iow &w, int got)
301	{	352	{
302	//TODO remove when we have better socket cleanup logic	353	//TODO remove when we have better socket cleanup logic
303	if (status == Ns_Dead)	354	if (destroyed ())
304	{	355	{
305	socket_ev.poll (0);	356	socket_ev.poll (0);
306	return;	357	return;
307	}	358	}
308		359
…		…
347	}	398	}
348	else	399	else
349	{	400	{
350	inbuf_len += amount;	401	inbuf_len += amount;
351		402
352	cst_tot.ibytes += amount;
353	cst_lst.ibytes += amount;
354
355	cmd_ev.start ();	403	cmd_ev.start ();
356	}	404	}
357	}	405	}
358	}	406	}
359		407
360	// called whenever we have additional commands to process	408	// called whenever we have additional commands to process
361	void	409	void
362	client::cmd_cb (iw &w)	410	client::cmd_cb (iw &w)
363	{	411	{
364	if (handle_packet () \|\| handle_command ())	412	if (handle_packet ())
365	w.start ();	413	w.start ();
366	else	414	else
367	flush ();	415	flush ();
368	}	416	}
369		417
…		…
381	*/	429	*/
382	void	430	void
383	client::send (void *buf_, int len)	431	client::send (void *buf_, int len)
384	{	432	{
385	char buf = (char )buf_;	433	char buf = (char )buf_;
386	char *pos = buf;
387	int amt = 0;
388		434
389	if (status == Ns_Dead \|\| !buf)	435	if (destroyed () \|\| !buf)
390	return;	436	return;
391		437
392	if ((len + outputbuffer.len) > SOCKETBUFSIZE)	438	if (len + outputbuffer.len > SOCKETBUFSIZE)
393	{	439	{
394	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);	440	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
395	destroy ();	441	// shutdown the socket, this is safer than destroying it immediately
		442	// as lots of code in the callchain might still access the map etc.
		443	shutdown (fd, SHUT_RDWR);
396	return;	444	return;
397	}	445	}
398		446
399	int avail, end;	447	int avail, end;
400		448
…		…
425	* shortcut function.	473	* shortcut function.
426	*/	474	*/
427	void	475	void
428	client::send_packet (packet &sl)	476	client::send_packet (packet &sl)
429	{	477	{
430	if (status == Ns_Dead)	478	if (destroyed ())
431	return;	479	return;
432		480
433	if (sl.length () >= MAXSOCKBUF)	481	if (sl.length () >= MAXSOCKBUF)
434	{	482	{
435	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());	483	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
…		…
476	va_end (ap);	524	va_end (ap);
477		525
478	send_packet (sl);	526	send_packet (sl);
479	}	527	}
480		528
		529	// returns true when the message needs special (read: perl) treatment
		530	static bool
		531	msg_is_special (const char *msg)
		532	{
		533	return msg [strcspn (msg, "<[&\n")];
		534	}
		535
		536	void
		537	client::send_msg (int color, const char type, const char msg)
		538	{
		539	if (msg_is_special (msg))
		540	cfperl_send_msg (this, color, type, msg);
		541	else if (can_msg)
		542	send_packet_printf ("msg %d %s %s", color, type, msg);
		543	else if (color < 0)
		544	return; // client cannot handle this
		545	else
		546	send_packet_printf ("drawinfo %d %s", color, msg);
		547	}
		548
		549	void
		550	client::send_drawinfo (const char *msg, int flags)
		551	{
		552	send_msg (flags, "log", msg);
		553	}
		554
481	/***********************************************************************	555	/***********************************************************************
482	*	556	*
483	* packet functions/utilities	557	* packet functions/utilities
484	*	558	*
485	**********************************************************************/	559	**********************************************************************/
486		560
		561	packet::packet (const char *name)
		562	{
		563	reset ();
		564
		565	int len = strlen (name);
		566	memcpy (cur, name, len); cur += len;
		567	*cur++ = ' ';
		568	}
		569
		570	packet &packet::operator <<(const ber32 v)
		571	{
		572	enum { maxlen = 32 / 7 + 1};
		573	uint8 buf[maxlen];
		574	uint8 *p = buf + maxlen;
		575	uint32 val = v.val;
		576
		577	*--p = val & 0x7F;
		578
		579	while (val > 0x7F)
		580	{
		581	val >>= 7;
		582	*--p = (val & 0x7F) \| 0x80;
		583	}
		584
		585	return *this << data (p, buf + maxlen - p);
		586	}
		587
487	packet &packet::operator <<(const data &v)	588	packet &packet::operator <<(const data &v)
488	{	589	{
489	if (room () < v.len)	590	if (room () < v.len)
490	reset ();	591	reset ();
491	else	592	else
…		…
528	return reset ();	629	return reset ();
529		630
530	cur += len;	631	cur += len;
531	}	632	}
532		633
533	/******************************************************************************
534	*
535	* statistics logging functions.
536	*
537	******************************************************************************/
538
539	#ifdef CS_LOGSTATS
540
541	/* cst_tot is for the life of the server, cst_last is for the last series of
542	* stats
543	*/
544	CS_Stats cst_tot, cst_lst;
545
546	/**
547	* Writes out the gathered stats. We clear cst_lst.
548	*/
549	void
550	write_cs_stats (void)
551	{
552	time_t now = time (NULL);
553
554	/* If no connections recently, don't both to log anything */
555	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
556	return;
557
558	/* CSSTAT is put in so scripts can easily find the line */
559	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
560	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
561	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
562	cst_lst.ibytes = 0;
563	cst_lst.obytes = 0;
564	cst_lst.time_start = now;
565	}
566	#endif
567

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.25 by root, Sun Dec 17 19:14:00 2006 UTC vs. Revision 1.50 by root, Thu Jul 12 19:36:58 2007 UTC

Diff Legend

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.25 by root, Sun Dec 17 19:14:00 2006 UTC vs.
Revision 1.50 by root, Thu Jul 12 19:36:58 2007 UTC