[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 1.49 by root, Sun Jul 1 05:00:20 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	// disconnect a socket after this many seconds without an ack
50	// easily die in 20 seconds...
51	#define SOCKET_TIMEOUT1 10	37	#define SOCKET_TIMEOUT 8.
52	#define SOCKET_TIMEOUT2 20	38
		39	// force a packet when idle for more than this many seconds,
		40	// forcing an ack regularly.
		41	#define IDLE_PING 2.
53		42
54	void	43	void
55	client::flush ()	44	client::flush ()
56	{	45	{
57	#ifdef __linux__	46	if (destroyed ())
		47	return;
		48
		49	#if HAVE_TCP_INFO
		50	// check about once per second, spread evenly over all clients
		51	// do this only when player is active
		52	if (!((pticks + fd) & 7) && pl && pl->active)
		53	{
58	// check time of last ack, and, if too old, kill connection	54	// check time of last ack, and, if too old, kill connection
59	struct tcp_info tcpi;	55	struct tcp_info tcpi;
60	socklen_t len = sizeof (tcpi);	56	socklen_t len = sizeof (tcpi);
61		57
62	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))	58	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
63	{	59	{
64	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;	60	if (tcpi.tcpi_snd_mss)
		61	mss = tcpi.tcpi_snd_mss;
65		62
66	rtt = tcpi.tcpi_rtt;	63	rtt = tcpi.tcpi_rtt;
67	rttvar = tcpi.tcpi_rttvar;	64	rttvar = tcpi.tcpi_rttvar;
68		65
69	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s	66	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	{	67	{
		68	send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
		69	write_outputbuffer ();
		70
72	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,	71	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);	72	(unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
74	destroy ();	73	destroy ();
		74	}
75	}	75	}
76	}	76	}
77	#endif	77	#endif
78		78
79	/**	79	/**
81	*	81	*
82	* When the socket is clear to write, and we have backlogged data, this	82	* When the socket is clear to write, and we have backlogged data, this
83	* is called to write it out.	83	* is called to write it out.
84	*/	84	*/
85		85
86	if (!outputbuffer.len \|\| socket_ev.poll () & PE_W)	86	// write a nop to the socket at least every IDLE_NOP seconds.
		87	if (!outputbuffer.len)
		88	{
		89	if (last_send + IDLE_PING <= NOW && pl && pl->active)
		90	{
		91	// this is a bit ugly, but map1/map1a seem to be the only
		92	// nop'able commands and they are quite small.
		93	packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
		94	send_packet (sl);
		95	}
		96	else
		97	return;
		98	}
		99
		100	if (socket_ev.poll () & PE_W)
87	return;	101	return;
88		102
		103	last_send = NOW;
89	write_outputbuffer ();	104	write_outputbuffer ();
90	}	105	}
91		106
92	void	107	void
93	client::write_outputbuffer ()	108	client::write_outputbuffer ()
…		…
103	/* wrap back to start of buffer */	118	/* wrap back to start of buffer */
104	if (outputbuffer.start == SOCKETBUFSIZE)	119	if (outputbuffer.start == SOCKETBUFSIZE)
105	outputbuffer.start = 0;	120	outputbuffer.start = 0;
106		121
107	outputbuffer.len -= res;	122	outputbuffer.len -= res;
108	#ifdef CS_LOGSTATS
109	cst_tot.obytes += res;
110	cst_lst.obytes += res;
111	#endif
112	}	123	}
113	else if (res == 0)	124	else if (res == 0)
114	{	125	{
115	LOG (llevError, "socket write failed, connection closed.\n");	126	LOG (llevError, "socket write failed, connection closed.\n");
116	destroy ();	127	destroy ();
…		…
183		194
184	/**	195	/**
185	* Dispatch table for the server.	196	* Dispatch table for the server.
186	*/	197	*/
187	static struct packet_type packets[] = {	198	static struct packet_type packets[] = {
188	{"ncom", PC(NewPlayerCmd) PF_PLAYING },	199	{"ncom", PC(NewPlayerCmd) PF_PLAYING \| PF_COMMAND6 },
189	{"command", PC(PlayerCmd) PF_PLAYING },	200	{"command", PC(PlayerCmd) PF_PLAYING \| PF_COMMAND0 },
190		201
191	{"examine", PC(ExamineCmd) PF_PLAYING },	202	{"examine", PC(ExamineCmd) PF_PLAYING },
		203	{"ex", PC(ExCmd) PF_PLAYING },
192	{"apply", PC(ApplyCmd) PF_PLAYING },	204	{"apply", PC(ApplyCmd) PF_PLAYING },
193	{"reply", PC(ReplyCmd) PF_IMMEDIATE },
194	{"lookat", PC(LookAt) PF_PLAYING },	205	{"lookat", PC(LookAt) PF_PLAYING },
195	{"lock", PC(LockItem) PF_PLAYING },	206	{"lock", PC(LockItem) PF_PLAYING },
196	{"mark", PC(MarkItem) PF_PLAYING },	207	{"mark", PC(MarkItem) PF_PLAYING },
197	{"move", PC(MoveCmd) PF_PLAYING },	208	{"move", PC(MoveCmd) PF_PLAYING },
198	{"exti", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
199	{"ext", PC(ExtCmd) 0 }, /* CF+ */	209	{"ext", PC(ExtCmd) 0 }, // CF+
200	{"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */	210	{"mapredraw", PC(MapRedrawCmd) 0 },
201	{"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */	211	{"mapinfo", PC(MapInfoCmd) 0 }, // CF+
202		212
		213	{"reply", SC(ReplyCmd) 0 },
		214	{"exti", SC(ExtiCmd) 0 }, // CF+
203	{"addme", SC(AddMeCmd) PF_IMMEDIATE },	215	{"addme", SC(AddMeCmd) 0 },
204	{"askface", SC(SendFaceCmd) PF_IMMEDIATE }, /* Added: phil */	216	{"askface", SC(AskFaceCmd) 0 },
205	{"requestinfo", SC(RequestInfo) PF_IMMEDIATE },	217	{"requestinfo", SC(RequestInfo) 0 },
206	{"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },	218	{"setfacemode", SC(SetFaceMode) 0 },
207	{"setsound", SC(SetSound) PF_IMMEDIATE },	219	{"setsound", SC(SetSound) 0 },
208	{"setup", SC(SetUp) PF_IMMEDIATE },	220	{"setup", SC(SetUp) 0 },
209	{"version", SC(VersionCmd) PF_IMMEDIATE },	221	{"version", SC(VersionCmd) 0 },
210	{"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /Added: tchize /	222	{"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /Added: tchize /
211	{"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /Added: tchize /	223	{"toggleextendedtext", SC(ToggleExtendedText) 0 }, /Added: tchize /
212	{"asksmooth", SC(AskSmooth) PF_IMMEDIATE }, /Added: tchize (smoothing technologies) /	224	{"asksmooth", SC(AskSmooth) 0 }, /Added: tchize (smoothing technologies) /
213	};	225	};
214		226
215	bool	227	bool
216	client::may_execute (const packet_type *pkt) const	228	client::may_execute (const packet_type *pkt) const
217	{	229	{
218	return (!(pkt->flags & PF_PLAYER) \|\| pl)	230	return (!(pkt->flags & PF_PLAYER) \|\| pl)
219	&& (!(pkt->flags & PF_PLAYING) \|\| (pl && pl->state == ST_PLAYING));	231	&& (!(pkt->flags & PF_PLAYING) \|\| state == ST_PLAYING);
		232	}
		233
		234	// HACK: some commands currently should be executed
		235	// even when the player is frozen. this hack detects
		236	// those commands. it should be folded into may_execute,
		237	// but kept seperate to emphasise the hack aspect, i.e.
		238	// do it better, then remove.
		239	static bool
		240	always_immediate (const client ns, const packet_type pkt, const char *data, int len)
		241	{
		242	if (!(pkt->flags & (PF_COMMAND0 \| PF_COMMAND6)))
		243	return false;
		244
		245	if (!ns->pl \|\| !ns->pl->ob \|\| !ns->pl->ob->map)
		246	return false;
		247
		248	if (pkt->flags & PF_COMMAND6)
		249	{
		250	data += 6;
		251	len -= 6;
		252	}
		253
		254	if (len > 4 && !strncmp (data, "say " , 4))
		255	return true;
		256	if (len > 5 && !strncmp (data, "chat ", 5))
		257	return true;
		258
		259	return false;
220	}	260	}
221		261
222	void	262	void
223	client::execute (const packet_type pkt, char data, int datalen)	263	client::execute (const packet_type pkt, char data, int datalen)
224	{	264	{
225	if (may_execute (pkt))	265	if (may_execute (pkt) \|\| always_immediate (this, pkt, data, datalen))
226	{	266	{
227	//TODO: only one format	267	//TODO: only one format
228	if (pkt->flags & PF_PLAYER)	268	if (pkt->flags & PF_PLAYER)
229	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);	269	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
230	else	270	else
…		…
271	}	311	}
272		312
273	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)	313	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
274	if (!strcmp ((char *)inbuf + 2, pkt->name))	314	if (!strcmp ((char *)inbuf + 2, pkt->name))
275	{	315	{
276	if (pkt->flags & PF_IMMEDIATE)	316	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
		317	queue_command (pkt, data, datalen);
		318	else
277	execute (pkt, data, datalen);	319	execute (pkt, data, datalen);
278	else
279	queue_command (pkt, data, datalen);
280		320
281	goto next_packet;	321	goto next_packet;
282	}	322	}
283		323
284	/* If we get here, we didn't find a valid command. Logging	324	// 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);	325	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
289	next_packet:	326	next_packet:
290	skip_packet (pkt_len);	327	skip_packet (pkt_len);
291		328
292	// input buffer has space again	329	// input buffer has space again
…		…
298	// callback called when socket is either readable or writable	335	// callback called when socket is either readable or writable
299	void	336	void
300	client::socket_cb (iow &w, int got)	337	client::socket_cb (iow &w, int got)
301	{	338	{
302	//TODO remove when we have better socket cleanup logic	339	//TODO remove when we have better socket cleanup logic
303	if (status == Ns_Dead)	340	if (destroyed ())
304	{	341	{
305	socket_ev.poll (0);	342	socket_ev.poll (0);
306	return;	343	return;
307	}	344	}
308		345
…		…
347	}	384	}
348	else	385	else
349	{	386	{
350	inbuf_len += amount;	387	inbuf_len += amount;
351		388
352	cst_tot.ibytes += amount;
353	cst_lst.ibytes += amount;
354
355	cmd_ev.start ();	389	cmd_ev.start ();
356	}	390	}
357	}	391	}
358	}	392	}
359		393
360	// called whenever we have additional commands to process	394	// called whenever we have additional commands to process
361	void	395	void
362	client::cmd_cb (iw &w)	396	client::cmd_cb (iw &w)
363	{	397	{
364	if (handle_packet () \|\| handle_command ())	398	if (handle_packet ())
365	w.start ();	399	w.start ();
366	else	400	else
367	flush ();	401	flush ();
368	}	402	}
369		403
…		…
381	*/	415	*/
382	void	416	void
383	client::send (void *buf_, int len)	417	client::send (void *buf_, int len)
384	{	418	{
385	char buf = (char )buf_;	419	char buf = (char )buf_;
386	char *pos = buf;
387	int amt = 0;
388		420
389	if (status == Ns_Dead \|\| !buf)	421	if (destroyed () \|\| !buf)
390	return;	422	return;
391		423
392	if ((len + outputbuffer.len) > SOCKETBUFSIZE)	424	if (len + outputbuffer.len > SOCKETBUFSIZE)
393	{	425	{
394	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);	426	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
395	destroy ();	427	// shutdown the socket, this is safer than destroying it immediately
		428	// as lots of code in the callchain might still access the map etc.
		429	shutdown (fd, SHUT_RDWR);
396	return;	430	return;
397	}	431	}
398		432
399	int avail, end;	433	int avail, end;
400		434
…		…
425	* shortcut function.	459	* shortcut function.
426	*/	460	*/
427	void	461	void
428	client::send_packet (packet &sl)	462	client::send_packet (packet &sl)
429	{	463	{
430	if (status == Ns_Dead)	464	if (destroyed ())
431	return;	465	return;
432		466
433	if (sl.length () >= MAXSOCKBUF)	467	if (sl.length () >= MAXSOCKBUF)
434	{	468	{
435	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());	469	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
…		…
476	va_end (ap);	510	va_end (ap);
477		511
478	send_packet (sl);	512	send_packet (sl);
479	}	513	}
480		514
		515	// returns true when the message needs special (read: perl) treatment
		516	static bool
		517	msg_is_special (const char *msg)
		518	{
		519	return msg [strcspn (msg, "<[&\n")];
		520	}
		521
		522	void
		523	client::send_msg (int color, const char type, const char msg)
		524	{
		525	if (msg_is_special (msg))
		526	cfperl_send_msg (this, color, type, msg);
		527	else if (can_msg)
		528	send_packet_printf ("msg %d %s %s", color, type, msg);
		529	else if (color < 0)
		530	return; // client cannot handle this
		531	else
		532	send_packet_printf ("drawinfo %d %s", color, msg);
		533	}
		534
		535	void
		536	client::send_drawinfo (const char *msg, int flags)
		537	{
		538	send_msg (flags, "log", msg);
		539	}
		540
481	/***********************************************************************	541	/***********************************************************************
482	*	542	*
483	* packet functions/utilities	543	* packet functions/utilities
484	*	544	*
485	**********************************************************************/	545	**********************************************************************/
486		546
		547	packet::packet (const char *name)
		548	{
		549	reset ();
		550
		551	int len = strlen (name);
		552	memcpy (cur, name, len); cur += len;
		553	*cur++ = ' ';
		554	}
		555
		556	packet &packet::operator <<(const ber32 v)
		557	{
		558	enum { maxlen = 32 / 7 + 1};
		559	uint8 buf[maxlen];
		560	uint8 *p = buf + maxlen;
		561	uint32 val = v.val;
		562
		563	*--p = val & 0x7F;
		564
		565	while (val > 0x7F)
		566	{
		567	val >>= 7;
		568	*--p = (val & 0x7F) \| 0x80;
		569	}
		570
		571	return *this << data (p, buf + maxlen - p);
		572	}
		573
487	packet &packet::operator <<(const data &v)	574	packet &packet::operator <<(const data &v)
488	{	575	{
489	if (room () < v.len)	576	if (room () < v.len)
490	reset ();	577	reset ();
491	else	578	else
…		…
528	return reset ();	615	return reset ();
529		616
530	cur += len;	617	cur += len;
531	}	618	}
532		619
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 1.49 by root, Sun Jul 1 05:00:20 2007 UTC

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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 1.49 by root, Sun Jul 1 05:00:20 2007 UTC