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

Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.18 by root, Fri Dec 15 04:21:29 2006 UTC vs.
Revision 1.68 by root, Thu Aug 9 04:11:24 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) 2002-2003 Mark Wedel & The Crossfire Development Team	5	* Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team
5	Copyright (C) 1992 Frank Tore Johansen	6	* Copyright (©) 1992,2007 Frank Tore Johansen
6		7	*
7	This program is free software; you can redistribute it and/or modify	8	* Crossfire TRT is free software: you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by	9	* it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or	10	* the Free Software Foundation, either version 3 of the License, or
10	(at your option) any later version.	11	* (at your option) any later version.
11		12	*
12	This program is distributed in the hope that it will be useful,	13	* This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.	16	* GNU General Public License for more details.
16		17	*
17	You should have received a copy of the GNU General Public License	18	* You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software	19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.	20	*
20
21	The author can be reached via e-mail to <crossfire@schmorp.de>	21	* The authors can be reached via e-mail to <crossfire@schmorp.de>
22	*/	22	*/
23		23
24	/**	24	/**
25	* \file	25	* \file
26	* Main client/server loops.	26	* Main client/server loops.
27	*	27	*
28	* \date 2003-12-02	28	* \date 2003-12-02
29	*	29	*
30	* loop.c mainly deals with initialization and higher level socket	30	* loop.c mainly deals with initialization and higher level socket
31	* maintenance (checking for lost connections and if data has arrived.)	31	* maintanance (checking for lost connections and if data has arrived.)
32	* The reading of data is handled in ericserver.c
33	*/	32	*/
34
35		33
36	#include <global.h>	34	#include <global.h>
37	#include <sproto.h>	35	#include <sproto.h>
38	#include <sockproto.h>	36	#include <sockproto.h>
39		37
45		43
46	#include <unistd.h>	44	#include <unistd.h>
47	#include <arpa/inet.h>	45	#include <arpa/inet.h>
48		46
49	#include <loader.h>	47	#include <loader.h>
50	#include <newserver.h>
51		48
52	/*****************************************************************************	49	#define BG_SCRUB_RATE 4 // how often to send a face in the background
53	* Start of command dispatch area.
54	* The commands here are protocol commands.
55	****************************************************************************/
56		50
57	/* Either keep this near the start or end of the file so it is	51	#define MAX_QUEUE_DEPTH 50
58	* at least reasonablye easy to find.	52	#define MAX_QUEUE_BACKLOG 3.
59	* There are really 2 commands - those which are sent/received
60	* before player joins, and those happen after the player has joined.
61	* As such, we have function types that might be called, so
62	* we end up having 2 tables.
63	*/
64		53
65	enum {	54	// disconnect a socket after this many seconds without an ack
66	PF_PLAYER = 0x01, // must have valid player	55	#define SOCKET_TIMEOUT 8.
67	PF_IMMEDIATE = 0x02, // TODO: hack, can be executed immediately
68	PF_PLAYING = 0x04, // must be in playing state
69	};
70		56
71	struct pkt_type	57	void
		58	client::reset_state ()
72	{	59	{
73	const char *name;	60	if (!pl)
74	void *cb;	61	return;
75	int flags;
76		62
77	bool may_execute (client_socket *ns)	63	pl->run_on = 0;
		64	pl->fire_on = 0;
		65	}
		66
		67	void
		68	client::queue_command (packet_type handler, char data, int datalen)
		69	{
		70	tstamp stamp = NOW;
		71
		72	if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
78	{	73	{
79	return (!(flags & PF_PLAYER) \|\| ns->pl)	74	//TODO: just disconnect here?
80	&& (!(flags & PF_PLAYING) \|\| (ns->pl && ns->pl->state == ST_PLAYING));	75	reset_state ();
		76	send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
81	}	77	}
82
83	void execute (client_socket ns, char data, int datalen)
84	{
85	//TODO: only one format
86	if (flags & PF_PLAYER)
87	((void ()(char , int, player * ))cb)((char *)data, datalen, ns->pl);
88	else	78	else
89	((void ()(char , int, client_socket ))cb)((char )data, datalen, ns);	79	{
90	}	80	cmd_queue.push_back (command ());
91	};	81	command &cmd = cmd_queue.back ();
92		82	cmd.stamp = stamp;
93	// SocketCommand, PlayingCommand, should not exist with those ugly casts	83	cmd.handler = handler;
94	#define SC(cb) (void )static_cast<void ()(char , int, client_socket )>(cb),	84	cmd.data = salloc<char> (datalen + 1, data);
95	#define PC(cb) (void )static_cast<void ()(char , int, player )>(cb), PF_PLAYER \|	85	cmd.datalen = datalen;
96
97	/**
98	* Dispatch table for the server.
99	*/
100	static struct pkt_type packets[] = {
101	{"ncom", PC(NewPlayerCmd) PF_PLAYING },
102	{"command", PC(PlayerCmd) PF_PLAYING },
103
104	{"examine", PC(ExamineCmd) PF_PLAYING \| PF_IMMEDIATE },
105	{"apply", PC(ApplyCmd) PF_PLAYING \| PF_IMMEDIATE },
106	{"reply", PC(ReplyCmd) PF_IMMEDIATE },
107	{"lookat", PC(LookAt) PF_PLAYING \| PF_IMMEDIATE },
108	{"lock", PC(LockItem) PF_PLAYING \| PF_IMMEDIATE },
109	{"mark", PC(MarkItem) PF_PLAYING \| PF_IMMEDIATE },
110	{"move", PC(MoveCmd) PF_PLAYING \| PF_IMMEDIATE },
111	{"ext", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
112	{"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */
113	{"mapinfo", PC(MapInfoCmd) PF_IMMEDIATE }, /* CF+ */
114
115	{"addme", SC(AddMeCmd) PF_IMMEDIATE },
116	{"askface", SC(SendFaceCmd) 0 }, /* Added: phil */
117	{"requestinfo", SC(RequestInfo) 0 },
118	{"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
119	{"setsound", SC(SetSound) PF_IMMEDIATE },
120	{"setup", SC(SetUp) PF_IMMEDIATE },
121	{"version", SC(VersionCmd) PF_IMMEDIATE },
122	{"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /Added: tchize /
123	{"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /Added: tchize /
124	{"asksmooth", SC(AskSmooth) 0 }, /Added: tchize (smoothing technologies) /
125	};
126
127	/**
128	* Handle client input.
129	*
130	* HandleClient is actually not named really well - we only get here once
131	* there is input, so we don't do exception or other stuff here.
132	* sock is the output socket information. pl is the player associated
133	* with this socket, null if no player (one of the init_sockets for just
134	* starting a connection)
135	*/
136
137	void
138	HandleClient (client_socket ns, player pl)
139	{
140	/* Loop through this - maybe we have several complete packets here. */
141	// limit to a few commands only, though, as to not monopolise the server
142	for (int repeat = 16; repeat--;)
143	{	86	}
144	/* If it is a player, and they don't have any speed left, we	87	}
145	* return, and will read in the data when they do have time.
146	*/
147	if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)
148	return;
149		88
150	int pkt_len = ns->read_packet ();	89	bool
		90	client::handle_command ()
		91	{
		92	if (!cmd_queue.empty ()
		93	&& state == ST_PLAYING
		94	&& pl->ob->speed_left > 0.f)
		95	{
		96	command &cmd = cmd_queue.front ();
151		97
152	if (pkt_len < 0)	98	if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW)
153	{	99	{
154	LOG (llevError, "read error on player %s\n", &pl->ob->name);	100	reset_state ();
155	/* Caller will take care of cleaning this up */	101	send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
156	ns->status = Ns_Dead;
157	return;
158	}
159	else if (pkt_len == 0)
160	/* Still dont have a full packet */
161	return;
162
163	/* First, break out beginning word. There are at least
164	* a few commands that do not have any paremeters. If
165	* we get such a command, don't worry about trying
166	* to break it up.
167	*/
168	int datalen;
169	char data = strchr ((char )ns->inbuf + 2, ' ');
170
171	if (data)
172	{
173	*data++ = 0;
174	datalen = pkt_len - (data - (char *)ns->inbuf);
175	}	102	}
176	else	103	else
		104	execute (cmd.handler, cmd.data, cmd.datalen);
		105
		106	cmd_queue.pop_front ();
		107	return true;
		108	}
		109	else
		110	return false;
		111	}
		112
		113	void
		114	client::tick ()
		115	{
		116	if (!pl \|\| destroyed ())
		117	return;
		118
		119	/* Update the players stats once per tick. More efficient than
		120	* sending them whenever they change, and probably just as useful
		121	*/
		122	esrv_update_stats (pl);
		123
		124	if (last_weight != -1 && last_weight != WEIGHT (pl->ob))
		125	{
		126	esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
		127	if (last_weight != WEIGHT (pl->ob))
		128	LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
		129	(unsigned long) last_weight, WEIGHT (pl->ob));
		130	}
		131
		132	draw_client_map (pl);
		133
		134	if (update_look)
		135	esrv_draw_look (pl);
		136
		137	#if HAVE_TCP_INFO
		138	// check time of last ack, and, if too old, kill connection
		139	socklen_t len = sizeof (tcpi);
		140
		141	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
		142	{
		143	if (tcpi.tcpi_snd_mss)
		144	mss = tcpi.tcpi_snd_mss;
		145
		146	#if 0
		147	fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n",
		148	tcpi.tcpi_unacked,
		149	tcpi.tcpi_sacked,
		150	tcpi.tcpi_lost,
		151	tcpi.tcpi_retrans,
		152	tcpi.tcpi_fackets,
		153	tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss,
		154
		155	tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked));
		156	#endif
		157
		158	// fast-time-out a player by checking for missign acks
		159	// do this only when player is active
		160	if (pl && pl->active
		161	&& tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
177	{	162	{
178	data = (char *)ns->inbuf + 2; // better read garbage than segfault	163	send_msg (NDI_RED \| NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
179	datalen = 0;	164	write_outputbuffer ();
		165
		166	LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
		167	(unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
		168	destroy ();
180	}	169	}
		170	}
		171	#endif
181		172
182	ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */	173	rate_avail = min (max_rate + mss, rate_avail + max_rate);
183		174
184	for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)	175	int max_send = rate_avail;
185	if (!strcmp ((char *)ns->inbuf + 2, pkt->name))	176
		177	#if HAVE_TCP_INFO
		178	// further restrict the available bandwidth by the excess bandwidth available
		179	max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss);
		180	#endif
		181
		182	// if we can split images, round to next-lowest mss
		183	if (fxix) max_send -= max_send % mss;
		184
		185	if (ixface.empty ())
		186	{
		187	// regularly send a new face when queue is empty
		188	if (bg_scrub && !--bg_scrub && enable_bg_scrub)
		189	while (scrub_idx < faces.size () - 1)
186	{	190	{
187	if (pkt->may_execute (ns))	191	++scrub_idx;
		192
		193	if (!faces_sent [scrub_idx])
		194	if (faceinfo *f = face_info (scrub_idx))
		195	if (f->type == FT_FACE \|\| f->type == FT_SOUND) // only scrub faces and sounds for now
188	{	196	{
189	pkt->execute (ns, data, datalen);	197	send_face (scrub_idx, -120);
190	ns->skip_packet (pkt_len);	198	flush_fx ();
191	//D//TODO not doing this causes random memory corruption	199
192	if (pkt->flags & PF_IMMEDIATE)	200	bg_scrub = 1; // send up to one fx per tick, unless an image was requested
193	goto next_packet;
194	return;	201	break;
195	}	202	}
196	}	203	}
197
198	/* If we get here, we didn't find a valid command. Logging
199	* this might be questionable, because a broken client/malicious
200	* user could certainly send a whole bunch of invalid commands.
201	*/
202	LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2);
203	ns->skip_packet (pkt_len);
204	next_packet:
205	;
206	}
207	}
208
209	void
210	flush_sockets (void)
211	{
212	for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i)
213	if ((*i)->status != Ns_Dead)
214	(*i)->flush ();
215	}
216
217	/**
218	* This checks the sockets for input, does the right thing.
219	*
220	* A bit of this code is grabbed out of socket.c
221	* There are 2 lists we need to look through - init_sockets is a list
222	*
223	*/
224	void
225	doeric_server (void)
226	{
227	int i, pollret;
228	fd_set tmp_read;
229	struct sockaddr_in addr;
230	socklen_t addrlen = sizeof (struct sockaddr);
231	player pl, next;
232	int maxfd = 0;
233
234	#ifdef CS_LOGSTATS
235	if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
236	write_cs_stats ();
237	#endif
238
239	/* Go through the players. Let the loop set the next pl value,
240	* since we may remove some
241	*/
242	//TODO: must be handled cleanly elsewhere
243	for (pl = first_player; pl; )
244	{	204	}
245	player *npl = pl->next;	205	else
		206	{
		207	bg_scrub = BG_SCRUB_RATE;
246		208
247	//TODO: must be handled cleanly elsewhere	209	for (;;)
248	if (pl->socket->status == Ns_Dead)
249	{	210	{
250	save_player (pl->ob, 0);	211	int avail = max_send - outputbuffer_len ();
251		212
252	if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))	213	if (avail <= 0)
		214	break;
		215
		216	ixsend &ix = ixface.back ();
		217
		218	if (facedata *d = face_data (ix.idx, faceset))
253	{	219	{
254	terminate_all_pets (pl->ob);	220	if (fxix)
255	pl->ob->remove ();	221	{
		222	// estimate the packet header overhead "ix " + idx + (new)ofs
		223	int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs);
		224	int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen;
		225
		226	// only transfer something if the amount of data transferred
		227	// has a healthy relation to the header overhead
		228	if (chunk < 64)
		229	break;
		230
		231	chunk = min (chunk, (int)ix.ofs);
		232
		233	ix.ofs -= chunk;
		234
		235	//fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D
		236
		237	packet sl ("ix");
		238
		239	sl << ber32 (ix.idx)
		240	<< ber32 (ix.ofs)
		241	<< data (d->data.data () + ix.ofs, chunk);
		242
		243	send_packet (sl);
		244	}
		245	else
		246	{
		247	send_image (ix.idx);
		248	ix.ofs = 0;
		249	}
256	}	250	}
		251	else
		252	ix.ofs = 0;
257		253
258	leave (pl, 1);	254	if (!ix.ofs)
259	final_free_player (pl);	255	{
		256	ixface.pop_back ();
		257
		258	if (ixface.empty ())
		259	break;
		260	}
260	}	261	}
261
262	pl = npl;
263	}
264
265	FD_ZERO (&tmp_read);
266
267	for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); )
268	{	262	}
269	client_socket s = i;
270		263
271	if (s->status == Ns_Dead)	264	rate_avail -= outputbuffer_len ();
272	{	265	}
273	client_sockets.erase (i);
274	delete s;
275	}
276	else
277	{
278	if (s->fd > maxfd) maxfd = s->fd;
279		266
280	FD_SET (s->fd, &tmp_read);	267	void
281		268	client::flush_sockets (void)
282	++i;	269	{
283	}
284	}
285
286	struct timeval timeout;
287
288	timeout.tv_sec = 0;
289	timeout.tv_usec = 0;
290
291	pollret = select (maxfd + 1,
292	&tmp_read, 0, 0,
293	&timeout);
294
295	if (pollret == -1)
296	{
297	LOG (llevError, "select failed: %s\n", strerror (errno));
298	return;
299	}
300
301	/* We need to do some of the processing below regardless */
302
303	/* Check for any input on the sockets */
304	for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i)	270	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
305	{	271	(*i)->flush ();
306	client_socket s = i;	272	}
307	player *pl = s->pl;
308		273
309	//TODO: disassociate handleclient from socket readin	274	void
310	if (s->inbuf_len \|\| FD_ISSET (s->fd, &tmp_read))	275	client::clock (void)
311	HandleClient (s, pl);	276	{
		277	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
		278	(*i)->tick ();
312		279
		280	// give them all the same chances
		281	flush_sockets ();
		282
313	//TODO: should not be done here, either	283	//TODO: should not be done here, either
314	if (s->status != Ns_Dead && pl)	284	for (unsigned i = 0; i < clients.size (); ++i)
315	{	285	clients[i]->refcnt_chk ();
316	/* Update the players stats once per tick. More efficient than
317	* sending them whenever they change, and probably just as useful
318	*/
319	esrv_update_stats (pl);
320	if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
321	{
322	esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
323	if (pl->last_weight != WEIGHT (pl->ob))
324	LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
325	(unsigned long) pl->last_weight, WEIGHT (pl->ob));
326	}
327
328	/* draw_client_map does sanity checking that map is
329	* valid, so don't do it here.
330	*/
331	draw_client_map (pl->ob);
332	if (s->update_look)
333	esrv_draw_look (pl->ob);
334	}
335	}
336	}	286	}
337		287

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Comparing deliantra/server/socket/loop.C (file contents): Revision 1.18 by root, Fri Dec 15 04:21:29 2006 UTC vs. Revision 1.68 by root, Thu Aug 9 04:11:24 2007 UTC

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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.18 by root, Fri Dec 15 04:21:29 2006 UTC vs.
Revision 1.68 by root, Thu Aug 9 04:11:24 2007 UTC